A novel approach for nutrients recovery from municipal waste as biofertilizers by combining electrodialytic and gas permeable membrane technologies
Open accessAbstract
The recovery of valuable materials from waste fits the principle of circular economy and sustainable use of resources, but contaminants in the waste are still a major obstacle. This works proposes a novel approach to recover high-purity phosphorus (P) and nitrogen (N) from digestate of municipal solid waste based on the combination of two independent membrane processes: electrodialytic (ED) process to extract P, and gas permeable membranes (GPM) for N extraction. A laboratory ED cell was adapted to accommodate a GPM. The length of waste compartment (10 cm; 15 cm), current intensity (50 mA; 75 mA) and operation time (9 days; 12 days) were the variables tested. 81% of P in the waste was successfully extracted to the anolyte when an electric current of 75 mA was applied for 9 days, and 74% of NH 4+ was extracted into an acid-trapping solution. The two purified nutrient solutions were subsequently used in the synthesis of a biofertilizer (secondary struvite) through precipitation, achieving an efficiency of 99.5%. The properties of the secondary struvite synthesized using N and P recovered from the waste were similar to secondary struvite formed using synthetic chemicals but the costs were higher due to the need to neutralize the acid-trapping solution, highlighting the need to further tune the process and make it economically more competitive. The high recycling rates of P and N achieved are encouraging and widen the possibility of replacing synthetic fertilizers, manufactured from finite sources, by secondary biofertilizers produced using nutrients extracted from wastes.
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High purity phosphorous (81%) from waste was recovered by electrodialysis and 74% of nitrogen in the form of nitrate was recovered from waste by gas permeable membrane for production of biofertilization.
“High purity phosphorous (81%) from waste were recovered by electrodialysis and 74% of nitrogen in the form of nitrate was recovered from waste by gas permeable membrane for production of biofertilization [124].”
From Food Waste Biorefinery: Pathway towards Circular Bioeconomy (2021) · cites this paper as [124]
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Food Waste Biorefinery: Pathway towards Circular Bioeconomy
Tsegaye, B., Jaiswal, S., & Jaiswal, A. K. (2021) · Foods · doi:10.3390/foods10061174 · Cited by 191 · see citing works
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- Authors
- Oliveira, V., Dias-Ferreira, C., González-García, I., Labrincha, J., Horta, C., & García-González, M. C.
- Affiliations
- Instituto Tecnológico Agrario de Castilla y León (ES)
- University of Aveiro (PT)
- Universidade Politécnica de Castelo Branco (PT)
- Venue
- Waste Management
- Publisher
- Elsevier BV
- Published
- 2021-04
- Volume
- 125
- Pages
- 293-302
- ISSN
- 0956-053X (ISSN-L)
- OpenAlex
- W3138419087
- Cited by
- 40
- References
- 27
- Citations by year
- 2026: 4 · 2025: 10 · 2024: 4 · 2023: 10 · 2022: 11 · 2021: 1
- FWCI
- 3.94
- Type
- journal article
- Language
- en
- Open access
- green
- doi.org
- Licence
- Locations
- Waste Management (publishedVersion)
- PubMed (publishedVersion)
- Hispana (submittedVersion, other-oa)
- Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion)
- UVaDOC UVaDOC University of Valladolid Documentary Repository (University of Valladolid) (submittedVersion, other-oa)
- Funders
- Fundação para a Ciência e a Tecnologia
- European Regional Development Fund
- Gobierno de Espana Agencia Estatal de Investigacion
- Topics
- Physical Sciences › Environmental Science › Waste Management and Disposal › Phosphorus and nutrient management
- Physical Sciences › Engineering › Biomedical Engineering › Membrane-based Ion Separation Techniques
- Physical Sciences › Engineering › Mechanical Engineering › Extraction and Separation Processes
- Keywords
- nutrient recovery, municipal solid waste, digestate, electrodialysis, gas-permeable membrane, phosphorus recovery, nitrogen recovery, biofertilizers, circular economy, ammonium extraction
- MeSH terms
- Struvite, Nutrients, Nitrogen, Phosphates, Phosphorus, Waste Disposal, Fluid, Wastewater
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