| Title: | Continuous waste activated sludge and food waste co-fermentation for synchronously recovering vivianite and volatile fatty acids at different sludge retention times: Performance and microbial response |
| Author(s): | Wu Y; Cao J; Zhang Q; Xu R; Fang F; Feng Q; Li C; Xue Z; Luo J; |
| Address: | "Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China; Guohe Environmental Research Institute (Nanjing) Co Ltd, Nanjing 211599, China. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China; Guohe Environmental Research Institute (Nanjing) Co Ltd, Nanjing 211599, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200000, China. Electronic address: luojy2016@hhu.edu.cn" |
| DOI: | 10.1016/j.biortech.2020.123610 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "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 FeCl(3) contributed to the fermentation conditions by adjusting pH biologically and increasing the concentration of organic substrates, which enhanced the Fe(3+) reduction efficiency and microbial activities (e.g., hydrolases and acidogenic enzymes). Microbial analysis found the functional bacteria related to Fe(3+) reduction and VFAs generation were further enhanced and enriched. Besides, results indicated that the efficiencies of Fe(2+) 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" |
| Keywords: | "Bioreactors Fatty Acids, Volatile Fermentation Ferrous Compounds Food Hydrogen-Ion Concentration Phosphates *Refuse Disposal *Sewage Anaerobic fermentation Food waste (FW) Sludge retention time (SRT) Vivianite Waste activated sludge (WAS);" |
| Notes: | "MedlineWu, Yang Cao, Jiashun Zhang, Qin Xu, Runze Fang, Fang Feng, Qian Li, Chao Xue, Zhaoxia Luo, Jingyang eng England 2020/06/07 Bioresour Technol. 2020 Oct; 313:123610. doi: 10.1016/j.biortech.2020.123610. Epub 2020 Jun 1" |
