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Effects of applying different carbon substrates on nutrient removal and greenhouse gas emissions by constructed wetlands treating carbon-depleted hydroponic wastewater
Abstract
The addition of external carbon sources is crucial for effective biological treatment of nutrient-rich but carbon-depleted hydroponic wastewater using constructed wetlands. In this study, we examined the effects of applying three types of carbon substrates, namely sucrose, hydroponic kale residues, and common reed litter, on the nutrient removal efficiency and greenhouse gas emission rate of vertical flow constructed wetlands. The addition of sucrose and common reed litter was shown to perform equally well in enhancing the removal of total nitrogen (84.9-93.5%), nitrate (98.3-99.8%) and phosphate (53.8-55.2%) as compared to the control. Moreover, the application of common reed litter led to significantly lower mean CH 4 and N 2 O emissions than that of kale residues. These findings suggested that Phragmites reed litter, which is easily found in wetlands worldwide, could be an effective, low-cost and climate-friendly carbon substrate to be applied in constructed wetlands for hydroponic wastewater treatment.
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“At pilot scale, a cyanobacterial consortium maintained in a 1150 L outdoor tubular PBR for 130 consecutive days at pH 10.4–11.4 achieved areal productivities of 3.1–5.8 g m−2 d−1 while enabling direct atmospheric CO2 capture, demonstrating that high-pH alkaliphilic cultivation supports stable long-term outdoor production [49].”
From Cyanobacteria as a Photosynthetic Chassis for Metabolic Pathway Engineering with Heterologous Gene Expression (2026) · cites this paper as [49]
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Walshe, J., & Saha, S. K. (2026) · Current Issues in Molecular Biology · doi:10.3390/cimb48060638 · Cited by 1
“…maintained in a 1150 L outdoor tubular PBR for 130 consecutive days at pH 10.4–11.4 achieved areal productivities of 3.1–5.8 g m − 2 d − 1 while enabling direct atmospheric CO 2 capture, demonstrating that high-pH alkaliphilic cultivation supports stable long-term outdoor production [49].”
Influential
Metadata
- Authors
- Zhou, T., Liu, J., Lie, Z., & Lai, D. Y. F.
- Affiliations
- Chinese University of Hong Kong (HK)
- Seoul National University (KR)
- Chinese Academy of Sciences (CN)
- Corresponding author
- Lai, Derrick Y.F.
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2022-08
- Volume
- 357
- Pages
- 127312
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W4280592540
- Cited by
- 55
- References
- 48
- Citations by year
- 2026: 14 · 2025: 11 · 2024: 11 · 2023: 16 · 2022: 3
- FWCI
- 5.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Waste Management and Disposal › Constructed Wetlands for Wastewater Treatment
- Physical Sciences › Environmental Science › Waste Management and Disposal › Wastewater Treatment and Reuse
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Innovations in Aquaponics and Hydroponics Systems
- Keywords
- constructed wetlands, carbon substrates, nutrient removal, greenhouse gas emissions, methane, nitrous oxide, sucrose, vertical flow constructed wetlands, nitrogen removal, phosphate removal, nitrate removal
- MeSH terms
- Greenhouse Gases, Nutrients, Carbon, Methane, Nitrogen, Nitrous Oxide, Sucrose, Hydroponics, Wetlands, Wastewater
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