期刊
BIORESOURCE TECHNOLOGY
卷 313, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123610
关键词
Anaerobic fermentation; Vivianite; Sludge retention time (SRT); Waste activated sludge (WAS); Food waste (FW)
资金
- National Natural Science Foundation of China [51708171, 51878243]
- China Postdoctoral Science Foundation [2018M630508, 2019T120387]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste [SERC2020C04]
A practical approach of synchronously recovering vivianite and volatile fatty acids (VFAs) by food waste (FW) and waste activated sludge (WAS) co-fermentation in continuous operation was investigated. Approximately 82.88% P as high-purity vivianite (95.23%) and 7894 mg COD/L VFAs were finally recovered. The simultaneous addition of FW and FeCl3 contributed to the fermentation conditions by adjusting pH biologically and increasing the concentration of organic substrates, which enhanced the Fe3+ reduction efficiency and microbial activities (e.g., hydrolases and acidogenic enzymes). Microbial analysis found the functional bacteria related to Fe3+ reduction and VFAs generation were further enhanced and enriched. Besides, results indicated that the effi- ciencies of Fe2+ and P release and VFAs recovery were highly linked to SRT, the satisfactory fermentation performance was obtained at SRT of 6 d. This research would provide a practical waste recycling technology to treat FW and WAS simultaneously for recovering vivianite and VFAs synchronously.
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