The DOI matches its Crossref record; 243 of the 243 references it cites were found in a registry or an index; 1 of the 146 sources its claims cite were checked for support.
Hybrid Treatment Systems for Dye Wastewater
Open accessAbstract
Virtually all the known physicochemical and biological techniques have been explored for treatment of extremely recalcitrant dye wastewater; none, however, has emerged as a panacea. A single universally applicable end-of-pipe solution appears to be unrealistic, and combination of appropriate techniques is deemed imperative to devise technically and economically feasible options. An in-depth evaluation of wide range of potential hybrid technologies delineated in literature along with plausible analyses of available cost information has been furnished. In addition to underscoring the indispensability of hybrid technologies, this article also endorses the inclusion of energy and water reuse plan within the treatment scheme, and accordingly proposes a conceptual hybrid dye wastewater treatment system.
Overview
AI snapshot
Written from the paper’s full text.
TL;DR
This review argues that no single treatment is a panacea for recalcitrant dye wastewater and evaluates hybrid combinations, concluding that biological-core hybrids—especially membrane bioreactors with dye-degrading fungi—are most prospective. It proposes a conceptual on-site system integrating MBR, optional AOP, and membrane recovery/reuse of water, salt, and chemicals.
Key findings
- No single universally applicable end-of-pipe solution is realistic; hybrid technologies are deemed imperative. AOPs are cost-prohibitive, effective only for wastewater with very low dye concentrations, and mostly limited to laboratory-scale studies; combinations among AOPs alone are unlikely to yield satisfactory effluent at reasonable cost.
- Hybrid technologies with biological processes as the core appear most prospective. A fungi-MBR system is reported to achieve stable 99% decoloration and 97% TOC removal from synthetic textile wastewater, and MBR with special dye-degrading microorganisms plus simultaneous adsorbent addition is highlighted as a potential contender.
- Cost analysis indicates AOP pretreatment prior to biological treatment is more cost-effective than complete mineralization by AOP; in the cited examples, AOP as post-treatment incurs less cost than as pre-treatment. Integrated systems achieving water and/or auxiliary chemical reuse can recover capital cost within a few years, and recovery/reuse schemes are noted to have a payback period of 2–3 years or less.
- The proposed conceptual system uses a submerged microfiltration MBR with a mixed microbial culture predominantly composed of white-rot fungi as its core, optionally followed by solar photocatalysis, with internal recycle and RO/NF for salt and water recovery; two cases are considered—an integrated textile plant and a segregated dyeing/finishing plant.
Methods
- Design: comprehensive literature review of hybrid technologies for dye wastewater treatment, categorizing combinations among AOPs, conventional physico-chemical processes with AOPs, and biological systems with physico-chemical/AOPs.
- Data: published studies and available cost information, including tables of typical examples and quoted cost values; no new experimental sample or primary dataset is generated.
- Analysis: qualitative synthesis of advantages and limitations of individual and hybrid techniques, plausible analysis of cost data, and proposal of a conceptual on-site treatment scheme incorporating energy and water reuse.
Limitations
- The paper states the proposed layout is not claimed to be a panacea, but rather one probable suitable combination; case-specific selection is key, and cost estimates are very site-specific, making direct comparison difficult, especially between segregated and mixed streams.
- The paper states AOP commercialization has not been realized due to cost and complexity, and that most AOP studies are small-scale laboratory investigations insufficient to establish practical feasibility; full-scale reports on sole AOP treatment of dye bath effluents are apparently lacking.
- Evident from the text: as a review, it synthesizes prior literature and does not present new experimental validation of the proposed conceptual system; the cost data are heterogeneous and based on varied assumptions.
Model-written summary. Check it against the paper before relying on it.
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Claims the paper makes
61 Sources not found · 51 No full text of the sources · 23 Own interpretation · 4 No basis given · 2 Not checked yet · 1 Partly supported · accuracy not yet measured
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“In addition to its adsorption capacity, activated carbon has also been reported to enhance anaerobic azo dye reduction 234 by acting as a biologically regenerable redox mediator due to quinone surface group on it.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Partly supportedcites [234] Zee F. P., 2003, Environ. Sci. Technol. sourceExperimental — accuracy not yet measured
The Abstract says activated carbon accepts electrons from microbial oxidation and transfers them to azo dyes, accelerating their reduction. It discusses quinone surface groups as a possible contributor to the catalysis; it does not establish that those groups are the cause, as the citing sentence states. (LLM, conf=0.87)
hedgeddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
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- Partly supported
In the paper
“Bulk of such studies report on improvement of biodegradability (as revealed by BOD/COD ratio or partial oxidation parameter 92 ) and reduction of toxicity (using bioassay, e.g., bioluminescence test) following some AOP treatment without involving actual experiment in biological reactor.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
What the sources say
- Not checked — no full text of the sourcecites [92] source
plaindirect- Asserted: passes — The authors put it forward as true.
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In the paper
“Under a higher biomass concentration (> 3g/l), the carbon particles are, however, trapped in the floc matrix and lose their properties of adsorption, thereby, hindering microbial growth and dye removal.141”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not checked — no full text of the sourcecites [141] Márquez M. C., 1997, Water Res. source
plaindirect- Asserted: passes — The authors put it forward as true.
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- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
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In the paper
“It allows the removal of COD and color from textile wastewater in a single step with no additional physicochemical treatment 141 .”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not checked — no full text of the sourcecites [141] Márquez M. C., 1997, Water Res. source
plaindirect- Asserted: passes — The authors put it forward as true.
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A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“After biological treatment ferrous sulfate cannot be used because pH is close to neutral.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 1. Biological/ Physico-chemical
plaindirect- Asserted: passes — The authors put it forward as true.
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- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
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In the paper
“However, concentrated sludge production and occurrence of frequent membrane fouling requiring costly membrane replacement impede widespread use of this technology 36 .”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > C. Membrane based combinations
What the sources say
- Not checked — no full text of the sourcecites [36] source
plaindirect- Asserted: passes — The authors put it forward as true.
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A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“A single universally applicable end-of-pipe solution appears to be unrealistic”
- Also stated in: § I. INTRODUCTION · hedged
“It appears that a single, universally applicable end-of-pipe solution is unrealistic”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Abstract
hedged- Asserted: passes — The authors put it forward as true.
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- Also stated in: § I. INTRODUCTION · hedged
In the paper
“Fixed granular activated carbon (GAC) bed inoculated with special chromophoric bondcleaving and aromatic ring-cleaving bacteria, after initial acclimatization period, have been reported to outperform conventional GAC bed.218”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not checked — no full text of the sourcecites [218] source
hedgeddirect- Asserted: passes — The authors put it forward as true.
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In the paper
“Dogruel et al 56 , pointed out to the selective preference of ozone for simpler readily biodegradable soluble COD fractions, which leads to unnecessary consumption of the chemical.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
What the sources say
- Not checked — no full text of the sourcecites [56] Dogruel S., 2002, J. Chem. Technol. Biotechnol. source
plaindirect- Asserted: passes — The authors put it forward as true.
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In the paper
“Owing to limited effectiveness of conventional biological treatment for recalcitrant textile wastewater composed of recalcitrant textile chemicals and dyes, various adsorbents and chemicals 161 , predominantly activated carbon, have been directly added into the activated sludge systems in certain studies.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not checked — no full text of the sourcecites [161] source
plain- Asserted: passes — The authors put it forward as true.
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- Probably not a substantial claim. 20
- It may state two separate claims as one. 58
- The quote only partly states this claim. 2
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Studies generally show that AOPs and membrane processes are more costly than biological processes.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > V. COST ANALYSIS
hedgedcorrelational- Asserted: passes — The authors put it forward as true.
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Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“Conversely, enhancement of COD removal (e.g., after ozonation) 127 or improvement of settleability of sludge (e.g., after electrofloatation) 43,130 may require physico-chemical treatment subsequent to AOPs.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 1. Biological/ Physico-chemical
What the sources say
hedgedconditional- Asserted: passes — The authors put it forward as true.
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In the paper
“The main step in dye removal for activated carbon amended biological process is microbial degradation, which is higher than adsorption on both activated carbon as well as on biomass.49”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not checked — no full text of the sourcecites [49] Costa C., 1997, Water Res. source
plaindirect- Asserted: passes — The authors put it forward as true.
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In the paper
“A novel approach entailing partial bioregeneration (physical adsorption on fluidized biological GAC followed by biodegradation and desorption), coupled with complementary periodic physical regeneration of 50% of total GAC, has been reported by Vuoriranta et al. 217 The system was observed to achieve an improved COD and color removal apart from reduction in regeneration cost and weight loss of GAC.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not checked — no full text of the sourcecites [217] Vuoriranta P., 1994, Water Sci. Technol. source
plaindirect- Asserted: passes — The authors put it forward as true.
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In the paper
“In the coagulation process, it is difficult to remove highly water-soluble dyes, and even more important, the process produces a large quantity of sludge.179”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > A. Coagulation based combinations
What the sources say
- Not checked — no full text of the sourcecites [179] source
plaindirect- Asserted: passes — The authors put it forward as true.
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It may state two separate claims as one.
In the paper
“These processes are cost prohibitive and complex at the present level of their development.163”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > II. COMBINATION AMONG AOPs
What the sources say
- Not checked — no full text of the sourcecites [163] source
plain- Asserted: passes — The authors put it forward as true.
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It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“A typical example of such processes is combination of advanced oxidation with an activated sludge treatment where the chemical oxidation is specifically aimed to partially degrade the recalcitrant contaminants to more easily biodegradable intermediates, thereby, enhancing subsequent biological unit and simultaneously avoiding the high costs of total mineralization by AOP.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
plaindirect- Asserted: passes — The authors put it forward as true.
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It may state two separate claims as one.
A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“On the other hand, the dose of coagulants and consequently the quantity of the chemical sludge after biological treatment are smaller compared to those in coagulation followed by biological treatment.57,75,100”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 1. Biological/ Physico-chemical
What the sources say
plaindirect- Asserted: passes — The authors put it forward as true.
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In the paper
“Further oxidation may not lead to any significant changes in the molecular weight distribution, but results in an increasing mineralization of low molecular weight biodegradable substances.92”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
What the sources say
- Not checked — no full text of the sourcecites [92] source
hedgedconditional- Asserted: passes — The authors put it forward as true.
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It may state two separate claims as one.
A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“Their stand alone application in treating textile/dye waste is, however, relatively ineffective 79,101,163 , for example, only 50% removal was achieved using either alum or ferrous sulfate for an azo reactive yellow dye.79”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > A. Coagulation based combinations
What the sources say
plaindirect- Asserted: passes — The authors put it forward as true.
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In the paper
“Nonetheless, the extent of combined COD removal achievable with this strategy may be limited in some cases, making utilization of a longer oxidation period necessary and the following biological process redundant.170”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
What the sources say
- Not checked — no full text of the sourcecites [170] Poole A. J., 2004, Water Res. source
hedgedconditional- Asserted: passes — The authors put it forward as true.
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The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Biological treatment is a cost-competitive and eco-friendly alternative.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > IV. BIOLOGICAL TREATMENT BASED COMBINATIONS A. Combination among biological processes
plain- Asserted: passes — The authors put it forward as true.
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Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds. It may state two separate claims as one.
In the paper
“Virtually all the known physico-chemical and biological techniques have been explored for treatment of extremely recalcitrant dye wastewater; none, however, has emerged as a panacea.”
- Also stated in: § I. INTRODUCTION · plain
“despite the fact that virtually all the known physico-chemical and biological techniques have been explored for decolorization, 79 none has emerged as a panacea.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Abstract
What the sources say
- Not checked — no full text of the sourcecites [79] source
plain- Asserted: passes — The authors put it forward as true.
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- Also stated in: § I. INTRODUCTION · plain
In the paper
“Coagulation followed by adsorption was reported to produce effluent of reuse standard, apart from cutting down the coagulant consumption by 50%, hence, lowering the volume of sludge formed, in comparison to coagulation only.163”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > A. Coagulation based combinations
What the sources say
- Not checked — no full text of the sourcecites [163] source
plaindirect- Asserted: passes — The authors put it forward as true.
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It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“combination of appropriate techniques is deemed imperative to devise technically and economically feasible options.”
- Also stated in: § I. INTRODUCTION · plain
“combination of different techniques is required to devise a technically and economically feasible option.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Abstract
plaindirect- Asserted: passes — The authors put it forward as true.
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Probably not a substantial claim. It may be too vague to check against evidence.
- Also stated in: § I. INTRODUCTION · plain
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“If considerable amount of biodegradable compounds originally exist in the wastewater, pre-oxidation step obviously will not lead to a significant improvement of biodegradability, rather will cause unnecessary consumption of chemicals.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
boosteddirect- Asserted: passes — The authors put it forward as true.
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A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“Although simultaneous adsorption and biodegradation treatment occasionally has been demonstrated as a mere combination of adsorption and biodegradation without any mutual enhancement 159 and has controversies in bioregeneration hypothesis 225 , application of this process to the treatment of textile wastewaters is an important economic improvement.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
hedged- Asserted: passes — The authors put it forward as true.
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It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Cost-competitive biological options are rather ineffective while physico-chemical processes are restricted in scale of operation and pollution profile of the effluent.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > I. INTRODUCTION
plain- Asserted: passes — The authors put it forward as true.
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In the paper
“For instance, Fenton-like treatment using Nafion-Fe +3 membrane, rather than direct addition of iron salt 17 , or immobilized TiO 2 photocatalysis rather than photo-Fenton process 164 would facilitate further biological treatment under biocompatible pH making neutralization redundant.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 2. Integrated Partial oxidation/ Biodegradation
What the sources say
hedgeddirect- Asserted: passes — The authors put it forward as true.
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A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“Accordingly although the dye removal in that process has frequently been reported to be better than in the conventional activated sludge process 161,197 , mode of COD removal may be the same.49”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
hedgedcorrelational- Asserted: passes — The authors put it forward as true.
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The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“As mentioned earlier, adsorption is a non-destructive method involving only phase change of pollutants, and hence imposes further problem in the form of sludge disposal.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > B. Adsorption based combinations
plaindirect- Asserted: passes — The authors put it forward as true.
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The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Hybrid processes based on membrane and photocatalysis have been reported to eradicate the problem of ultrafine catalyst to be separated from the treated liquid in case of slurry reactors, with the added advantage of membrane acting as selective barrier for the species to be degraded.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > C. Membrane based combinations
plaindirect- Asserted: passes — The authors put it forward as true.
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A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“Hence it is strongly believed that their combination will result in more free radicals, thereby increasing the rates of reactions.72,73”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > II. COMBINATION AMONG AOPs
What the sources say
boosteddirect- Asserted: passes — The authors put it forward as true.
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- Rests on an assumption: Advanced oxidation processes are only effective for wastewater with very low concentrations of organic dyes.
In the paper
“Carbonbiocatalyst amalgamation in adsorption cartridges for decoloration has been commercialized ('BIOCOL') in UK.48”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 3. Biodegradation/ Adsorption
What the sources say
- Not matchedcites [48]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plain- Asserted: passes — The authors put it forward as true.
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A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“To sustain an uninterrupted supply of non-specific extra cellular enzyme by fungi, the reactor requires to be operated under a quasi-controlled environment (acidic pH) with simultaneous supply of an easily biodegradable carbon source (e.g., starch used in textile sizing).”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
plaindirect- Asserted: passes — The authors put it forward as true.
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A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“It is worth mentioning here that recovery/ reuse of both chemicals and water is different from that of only water, in that, the former entails handling of the point sources separately, while the latter may be achieved by following usual end-of-pipe strategy (mixing different streams).”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
plaindirect- Asserted: passes — The authors put it forward as true.
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Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds. It may state two separate claims as one.
In the paper
“Under natural pH (10.66) 5 min pre-ozonation (293 mg/l), removing high UV-absorbing components (60% reduction in UV 254 ), accelerated subsequent 55 min.H 2 O 2 (50 mmol/l)-UV(25W) treatment, enhancing its COD & TOC removal efficiency by a factor of 13 & 4, respectively; the combined treatment yielding 25% COD, 50% TOC & complete color removal (Initial COD=1476 mg/l; TOC= 336mg/l).”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 8 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirectSingle case- Asserted: passes — The authors put it forward as true.
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- Not matched
In the paper
“H 2 O 2 , yielding .OH by reacting with hydrated electron formed in radiolysis of water, achieved enhanced decoloration (100%, 50 ppm dye) and COD removal (76-80%) with 1 and 15 kGy doses for RB5 and RB15, respectively, decoloration (%) being the highest at the lowest dose rate (0.14 kGy/h).”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 194 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one. The quote only partly states this claim.
- Not matched
In the paper
“Development of such a system offering stable 99% decoloration and 97% TOC removal from synthetic textile wastewater along with avoidance of membrane fouling has been recently documented.78”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > b. Membrane bioreactors
What the sources say
- Not checked — no full text of the sourcecites [78] source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“TOC removal [180 min.]:30%; Decoloration [30 min.]:75-85% for 60-100 mg/L concentration; Low efficiency due to radical scavenging by the graphite cathode.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 116 (2004)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Combined sonolysis (520 kHz) and ozonation (irradiation intensity, O 3 input and volume were 1.63 W cm -2 ; 50 l h/1; and 600 ml) showed synergistic effect, doubling the decolorization (100%, 15 min.)and mineralization (76%, 1hr) rate.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 90 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Chemical synergism of photochemical & electrochemical processes yielded enhanced decoloration (95%), COD removal (87%) & TOC removal (81%) in 30 min [Dye=1 mmol/l; 500W lamp, 6.64 mWcm -2 ; 1gTiO 2 /200 ml; 30 V DC; Natural pH(6.6)].”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 6 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“Membrane filtration of biologically pretreated dye wastewater 109 has been occasionally reported to require less cost than that for direct membrane filtration 108 of dye bath, presumably as the former involves less membrane fouling.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > V. COST ANALYSIS
What the sources say
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Moreover, use of the AOP for post treatment will minimize its light penetration limitation, which would be significant if it were used for pre-treatment.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: unclear — It is unclear why the paper says it holds.
It may state two separate claims as one.
In the paper
“85% color removal (Dye=100 mg/l) & 90% COD removal within 10 mins.with 24.5 mmol H 2 O 2 /l and 1.225 mmol FeSO 4 /l at pH=3, resulting effluent having only 7.29% inhibition in bioluminescence test.Presence of dispersing agent reduces removal efficiency.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 153 (2003)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“UV (125 W)-H 2 O 2 (565.8mg/l, 16.6 mM): Complete decoloration (35 min.)& 82% TOC removal (60 min.)for 40 mg/l dye at natural pH (7.5), although subsequent toxicity test recommended.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 46 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Sonication (50 kHz, 150 W) enhanced oxidation property of MnO 2 (1 g/l) by improving mass transfer, removal of passivating outer oxide layer & production of H 2 O 2 , eventually realizing 94.93% decolorization (argon atmosphere) and 48.12 % TOC removal (oxygen atmosphere) [initial pH=3, 240 min.].”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 68 (2003)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Removals (60 min.)-Photocatalysis(0.1 g/l anatase TiO 2 , 125 W, fluency rate 31.1 J m 2 s -1 , pH=11): Color= 90%, TOC= 50%; Ozonation (pH=11, 14 mg/l): Color= 60%, TOC= negligible; Combined: Color=100%, TOC> 60%, Toxicity=50%”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 146 (2000)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This example may be further extended to filtration of segregated dye bath effluent utilizing membrane of appropriate molecular cut off size which allows passage of salt but retains dye.Consequently dye bath water containing salt may be reused for dye bath reconstruction, while the membrane-concentrate may be degraded in anaerobic digester.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 4. Biodegradation/ Membrane filtration a. Chronological application
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Due to declining membrane costs 34 , recovery and reuse of chemicals and water using membrane is expected to gain rapid acceptability in near future.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
What the sources say
- Not checked — no full text of the sourcecites [34] source
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“However, because of the numerous site-specific factors and assumptions inevitably made in such estimates, a direct comparison is difficult.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > V. COST ANALYSIS
plain- Asserted: passes — The authors put it forward as true.
- Checkable: fails — It may be too vague to check against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. It may be too vague to check against evidence. The paper’s conclusions may not depend on it.
- Rests on an assumption: Most costs of dye wastewater treatment are very site-specific.
In the paper
“Decoloration (20 mg/l dye): 100% in 10 min.by O 3 (6 l/min.O 2 ) with/without UV; 80% in 25 min.by H 2 O 2 -UV.Negligible enhancement of ozonation by UV (low power) due to absorption of most UV by dye.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 192 (1995)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Rinsing water may be reused after reclamation by membrane while the concentrated waste may be degraded in anaerobic digester.219”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 4. Biodegradation/ Membrane filtration a. Chronological application
What the sources say
- Not checked — no full text of the sourcecites [219] Wenzel H., 1996, Desalination source
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“The MBR system has been envisaged to be capable of coping with the impedances in implementation of white-rot fungi in large scale industrial waste treatment, such as, rather slow fungal degradation 147 , loss of the extracellular enzymes and mediators with discharged water 235 , and excessive growth of fungi 236 .”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > b. Membrane bioreactors
What the sources say
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
In the paper
“Dye removal (0.5 mmol/l), 150 min., pH 3: UV (64W, 365nm)-H 2 O 2 (10 mmol)= 88.68% decolourisation , 59.85% degradation.Sunlight-H 2 O 2 = 80.15% decolourisation, 50.91% degradation.Dye auxiliaries like Na 2 CO 3 , NaOH seriously retard decoloration rate while NaCl does not.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 149 (2004)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“In contrast to negligible removal by MW (300W), or less removal by photocatalysis (75W, 0.3mW cm -2 ; 30 mg TiO 2 /30 ml) alone, combined process achieved 97% decoloration (Dye= 0.05 mM) and 73% TOC removal within 3 hrs at pH=5.5.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 84 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Besides, post treatment of the MBR-permeate by an AOP will ensure complete decoloration.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper may give no reason why it holds.
In the paper
“95% color (Dyes= 0.5 g/l), 48% COD (initially= 3784 mg/l) removal and 10 times improvement in BOD 5 /COD ratio at natural acidic pH of dye bath ( 3.6 mM Fe +2 ; [Fe +2 ]: [O 3 ]= 1:14; FeSO 4 .7H 2 O= 1000 mg/l).Negligible TOC removal is due to low O 3 dose of 14 g/l.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 9 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“However, both the processes furnish potential of water reuse, thereby, achieving further cost savings.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > V. COST ANALYSIS
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“A treatment scheme comprising activated carbon amended anaerobic reactor preceding aerobic MBR realizes stable decoloration along with high TOC removal, with concurrent improvement in activated sludge dewaterability and reduction in filtration resistance.157”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > b. Membrane bioreactors
What the sources say
- Not checked — no full text of the sourcecites [157] source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This eventually leads to a poor color and COD removal performance.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VII.CONCLUSION
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper may give no reason why it holds.
- Rests on an assumption: Residual dyes along with auxiliary chemical reagents, impurities from raw materials, and other hazardous materials applied in finishing impose a massive load on wastewater treatment systems.
In the paper
“Treatment trains composed of conventional physico-chemical and biological systems involve sustainable cost 155 , however, their removal performance may not satisfy contemporary stricter regulations.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > V. COST ANALYSIS
What the sources say
- Not checked — no full text of the sourcecites [155] Nicolaou M., 1992, Water Sci. Technol. source
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Enhanced decoloration (100% for 50 mg/l dye) & mineralization (95%) in 1 hr (19W lamp, 1g/l TiO 2 , 100 mg/l H 2 O 2 , pH=5.4) along with 85% reduction in toxicity.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 173 (2003)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Such practice may, however, give rise to concern about salinity increase in biological plant.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 4. Biodegradation/ Membrane filtration a. Chronological application
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
In the paper
“Decoloration and TOC removal of dye (0.5 mM) in 0.5 mmol l -1 NaCl solution within 60 min.(Natural pH) : i) Adsorption on packed material: 9%, --; ii)Photocatalysis [TiO 2 (antase= 70%)-coated quartz sand, 500 W high-pressure mercury lamp]: 70%, 20%; iii) Electro-oxidation [30.0 V DC cell voltage, reaction flow rate=190 ml min -1 , 0.05 MPa airflow]: 77%, 7%; iv) Photoelectrocatalysis: 96%, 38%.Ob”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 238 (2003)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“UV (15 W)/ H 2 O 2 (optimum dose 24.5 mmol/l): 15 min.: [Decolorization>65%, COD removal= 40-70%], 60 min.: [Decolorization> 99%]; Degradation by products unobjectionable.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 152 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Sonication (320 kHz) dramatically enhanced oxidation efficiency of UV(6@11W)+H 2 O 2 ( 0.1 ml/l) system (pH=11) by improving oxygen uptake & transfer, the combined process achieving 94% dye (0.1 g/l) removal in 60 min.following pseudo 1 st order kinetics.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 63 (1999)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
boosteddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Over 90% decolorization of 100 ppm dye within 24 hr.(70-80% within first 6 hr.) with 10 mM CuSO 4 , 200 mM ange N=N , Reactive N=N black 5; Poly AQ B-411, Reactive AQ blue 2, RBBR AQ , Acridin (Basic) AQ orange; Azure blue TH , Crystal violet TPM H 2 O 2 and low dose of glucaric acid (15 mM).Insensitive to pH, unlike fenton reaction.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites [2004]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“These concerns have led to new and/or stricter regulations concerning colored wastewater discharges, rendering the decolorization process further difficult and costly.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VII.CONCLUSION
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
- Rests on an assumption: Release of colored wastewater into the ecosystem is a source of esthetic pollution, eutrophication, and perturbations in aquatic life.
A claim is checked only against the cited paper’s full text, never its abstract, and none is available for its sources.
In the paper
“This assumption was prompted by the fact that such practice realizes cost-savings through reduction in production of waste and consumption of fresh chemicals/water, and consequently the usual payback period of the high capital investment associated with it is 2-3 years or less.151,180”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
What the sources say
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. It may state two separate claims as one.
In the paper
“Sunlight, supplying higher number of photons (3-4x10 -3 W cm -2 ) than the low power artificial source (350 nm, 6W, 1.3x10 -4 W cm -2 ), resulted in faster complete decoloration (15-30 min.)and complete (or near) TOC removal (20-60 min.)for dye concentration of 100 mg/l with 10 mg/l Fe +2 and 100-250 mg/l H 2 O 2 [pH=3].”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 207 (2004)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The concentrates generated there from and discarded streams (including dye), however, entail further effective economical treatment.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > VI. PROPOSED HYBRID PROCESS
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper may give no reason why it holds.
In the paper
“Wu et al. 224 reported a cost-competitive dye wastewater reclamation system involving deep aeration activated sludge prior to bioactivated carbon and nanofiltration, which, in addition to yielding prolonged membrane life and recovery/reuse potential, allowed direct discharge of concentrated membrane-retentate.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > 4. Biodegradation/ Membrane filtration a. Chronological application
What the sources say
- Not checked — no full text of the sourcecites [224] Wu H.-Z., 2005, Desalination source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“compounds too large to be adsorbed onto ACC are successfully retained by the membrane (>98% turbidity & 15-40% dye removal)”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 168 (2000)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Annualized total installation cost is US$ 243,000 while saving generated from water reuse is US$ 98,000.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 120 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“With expected decline in membrane cost to US$ 50 m -2 in 2004, the unit cost would reduce to US$ 0.181 m -3 .”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 228 (2004)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
hedgeddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Not matched
In the paper
“49% turbidity & 71% color removal by clariflocculation & ozonation, respectively”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 139 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Membrane bioreactor US$ 0.273 m -3 Municipal wastewater”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 228 (2004)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Not matched
In the paper
“Reuse after Membrane filtration (i), followed by UV/H 2 O 2 (ii), concurrent with reuse after membrane concentrate treatment by Wet air oxidation (iii) and Biological (iv) US$ m -3 (i) 0.53 (ii)2.6 (iii)4.4(iv)0.13”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 120 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Not matched
In the paper
“contributed to achievement of final 66% COD and 93% color removal”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 139 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“Required fresh water supply (50% of total) incurs a further cost of 0.92 US$ m -3 .”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 42 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Not matched
In the paper
“Sonification (320 kHz) significantly enhanced the decoloration (Dye= 0.1 g/L) efficiency of UV/ H 2 O 2 .Higher flow rate (insufficient irradiation) necessitated higher dosing rate of H 2 O 2 .”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > D i f f e r e n t P h y s i c o -c h e m i c a l p r o c e s s e s A d v a n c e d O x i d a t i o n P r o c e s s , A O P
What the sources say
- Not matchedcites 64 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
boosteddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
In the paper
“A payback of investment cost may be expected in 3 yrs with the saving of water supply cost.”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 139 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
hedgedconditionalSingle case- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one. The quote only partly states this claim.
- Not matched
In the paper
“Reuse after Membrane filtration (i), followed by UV/H 2 O 2 (ii), concurrent with reuse after membrane concentrate treatment by Wet air oxidation (iii) and Biological (iv) US$ m -3 (i) 0.53 (ii)2.6 (iii)4.4(iv)0.13”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 120 (2001)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Not matched
In the paper
“high turbidity (27%) & TSS (30%) removal by the subsequent UF membrane”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Additional information
What the sources say
- Not matchedcites 139 (2002)
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
The paper relies on this without support.
Advanced oxidation processes are only effective for wastewater with very low concentrations of organic dyes.
“Additional impediment exists in treatment of dye wastewater with relatively higher concentration of dyes, as AOPs are only effective for wastewater with very low concentrations of organic dyes.”
The paper relies on this without support.
Inclusion of an energy and water reuse plan within a dye wastewater treatment scheme is feasible and beneficial.
“this paper also endorses the inclusion of energy and water reuse plan within the treatment scheme, and accordingly proposes a conceptual hybrid dye wastewater treatment system.”
“a conceptual on-site textile dye wastewater treatment system integrated with energy and water recovery/reuse has been proposed.”
The authors state this as an assumption.
An ideal state of practice of recovery and reuse of textile chemicals, energy, and water by using appropriate membranes is assumed for the proposed system.
“Additionally, an ideal state of practice of recovery and reuse of textile chemicals (sizing agent, detergent, lanolin from raw wool scouring, caustic for cotton mercerizing, dye bath electrolyte), energy (heat) and water by using appropriate membranes has been assumed (Fig. 2).”
The paper relies on this without support.
Most costs of dye wastewater treatment are very site-specific.
“Most costs are very site-specific, and for a full-scale system these costs strongly depend on the flow rate of the effluent, the configuration of the reactor, the nature (concentration) of the effluent as well as the pursued extent of treatment.”
The paper relies on this without support.
Bacterial activity in a GAC bed may decrease after a certain period due to lack of nutrient and/or dissolved oxygen.
“However, the bacterial activity in GAC bed may decrease after certain period due to lack of nutrient and/or dissolved oxygen.”
The paper relies on this without support.
Residual dyes along with auxiliary chemical reagents, impurities from raw materials, and other hazardous materials applied in finishing impose a massive load on wastewater treatment systems.
“Residual dyes along with other auxiliary chemical reagents used for processing, impurities from the raw materials and other hazardous materials applied in the finishing process impose massive load on wastewater treatment system.”
The paper relies on this without support.
Release of colored wastewater into the ecosystem is a source of esthetic pollution, eutrophication, and perturbations in aquatic life.
“The release of colored wastewater in the ecosystem is a remarkable source of esthetic pollution, eutrophication and perturbations in aquatic life.”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Rated minor: it would not touch a result — a value no result rests on, a p-value that stays on the same side of the significance level, or a conflict that is clerical, resolved elsewhere in the paper, or outside its own findings.
In the paper
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > b. Membrane bioreactors
“Development of such a system offering stable 99% decoloration and 97% TOC removal from synthetic textile wastewater along with avoidance of membrane fouling has been recently documented.78”
§ Hybrid treatment systems for dye wastewater Hybrid treatment systems for dye wastewater > Oiling
“HRT of 15 hrs., under a pH of 4.5, temperature of 28C and otherwise non-sterile condition, stable 98% decoloration and 97% TOC removal was achieved.”
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Metadata
- Authors
- Hai, F. I., Yamamoto, K., & Fukushi, K.
- Affiliations
- The University of Tokyo (JP)
- Environmental Science Center, The University of Tokyo (JP)
- Venue
- Critical Reviews in Environmental Science and Technology
- Publisher
- Informa UK Limited
- Published
- 2007-05-14
- Volume
- 37
- Issue
- 4
- Pages
- 315-377
- ISSN
- 1064-3389 (ISSN-L)
- 1547-6537
- OpenAlex
- W1496105965
- Cited by
- 557
- References
- 241
- Citations by year
- 2026: 18 · 2025: 13 · 2024: 21 · 2023: 31 · 2022: 50 · 2021: 41 · 2020: 45 · 2019: 38 · 2018: 46 · 2017: 35 · 2016: 30 · 2015: 22 · 2014: 22 · 2013: 26 · 2012: 37
- FWCI
- 20.40
- Type
- journal article
- Language
- en
- Open access
- green
- ro.uow.edu.au
- Locations
- Critical Reviews in Environmental Science and Technology (publishedVersion)
- Research Online (University of Wollongong) (submittedVersion)
- Figshare (submittedVersion, cc-by)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Physical Sciences › Environmental Science › Waste Management and Disposal › Wastewater Treatment and Reuse
- Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Keywords
- dyeing wastewater, hybrid treatment systems, recalcitrant dyes, physicochemical treatment, biological treatment, treatment cost analysis, energy reuse, water reuse
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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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