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Monballiu A, Desmidt E, Ghyselbrecht K, Meesschaert B. The inhibitory effect of inorganic carbon on phosphate recovery from upflow anaerobic sludge blanket reactor (UASB) effluent as calcium phosphate. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:2608-2615. [PMID: 30767925 DOI: 10.2166/wst.2019.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
After treatment of the wastewater from the potato processing industry in an upflow anaerobic sludge blanket reactor (UASB) the effluent is rich in phosphate and dissolved inorganic carbon (IC). Increasing the pH of the UASB effluent with NaOH to precipitate phosphate as calcium phosphate leads to contamination with magnesium phosphate. Increasing the pH with Ca(OH)2 had a positive effect on phosphate precipitation, but after increasing the pH with Na2CO3 no precipitate was formed. After prior nitrification of the UASB effluent to remove IC, less NaOH was needed to increase the pH and the ions precipitated in a ratio that agreed with calcium phosphate formation. When the pH of the nitrified effluent was increased with Na2CO3 neither calcium nor phosphate precipitated. This inhibitory effect of IC on phosphate precipitation as calcium phosphate could not be derived from the saturation indexes calculated by the geochemical modelling program PHREEQC.
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Affiliation(s)
- A Monballiu
- Laboratory for Microbial and Bio-Chemical Technology, Cluster for Bio-engineering, Faculty of Engineering Technology, KU Leuven Bruges Campus, Spoorwegstraat 12, 8200 Brugge, Belgium E-mail:
| | - E Desmidt
- Laboratory for Microbial and Bio-Chemical Technology, Cluster for Bio-engineering, Faculty of Engineering Technology, KU Leuven Bruges Campus, Spoorwegstraat 12, 8200 Brugge, Belgium E-mail:
| | - K Ghyselbrecht
- Laboratory for Microbial and Bio-Chemical Technology, Cluster for Bio-engineering, Faculty of Engineering Technology, KU Leuven Bruges Campus, Spoorwegstraat 12, 8200 Brugge, Belgium E-mail:
| | - B Meesschaert
- Laboratory for Microbial and Bio-Chemical Technology, Cluster for Bio-engineering, Faculty of Engineering Technology, KU Leuven Bruges Campus, Spoorwegstraat 12, 8200 Brugge, Belgium E-mail:
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Zhao WY, Zhou M, Yan B, Sun X, Liu Y, Wang Y, Xu T, Zhang Y. Waste Conversion and Resource Recovery from Wastewater by Ion Exchange Membranes: State-of-the-Art and Perspective. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00519] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wen-Yan Zhao
- Waste Valorization and Water Reuse Group (WVWR), Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, China
- State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, PR China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Miaomiao Zhou
- Waste Valorization and Water Reuse Group (WVWR), Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, China
- State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, PR China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Binghua Yan
- Waste Valorization and Water Reuse Group (WVWR), Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, China
- Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Xiaohan Sun
- Waste Valorization and Water Reuse Group (WVWR), Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, China
- Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Yang Liu
- Waste Valorization and Water Reuse Group (WVWR), Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, China
- Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Yaoming Wang
- CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, PR China
| | - Tongwen Xu
- CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, PR China
| | - Yang Zhang
- Waste Valorization and Water Reuse Group (WVWR), Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, China
- Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
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Zhang Y, Desmidt E, Van Looveren A, Pinoy L, Meesschaert B, Van der Bruggen B. Phosphate separation and recovery from wastewater by novel electrodialysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:5888-5895. [PMID: 23651001 DOI: 10.1021/es4004476] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Stimulated by the depletion of phosphate resources, phosphate recovery systems have been studied in recent years. The use of struvite reactors has proven to be an effective phosphate recovery process. However, the struvite reactor effluent still consists of an excessive amount of phosphate that cannot be recovered nor can be directly discharged. In this study, selectrodialysis (SED) was used to improve the efficiency of phosphate recovery from a struvite reactor: SED was implemented in such a way that phosphate from the effluent of an USAB (upflow anaerobic sludge blanket) reactor was transferred to the recycled effluent of a struvite reactor. Prior to the experiments, synthetic water with chloride and phosphate was used to characterize the efficiency of SED for phosphate separation. Results indicate that SED was successful in concentrating phosphate from the feed stream. The initial current efficiency reached 72%, with a satisfying (9 mmol L(-1)) phosphate concentration. In the experiments with the anaerobic effluent as the phosphate source for enrichment of the effluent of the struvite reactor, the phosphate flux was 16 mmol m(-2) h(-1). A cost evaluation shows that 1 kWh electricity can produce 60 g of phosphate by using a full scale stack, with a desalination rate of 95% on the feed wastewater. Finally, a struvite precipitation experiment shows that 93% of phosphate can be recovered. Thus, an integrated SED-struvite reactor process can be used to improve phosphate recovery from wastewater.
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Affiliation(s)
- Yang Zhang
- Department of Chemical Engineering, Process Engineering for Sustainable Systems, KU Leuven, W. de Croylaan 46, B-3001 Leuven, Belgium.
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