Two-Phase improves Bio-hydrogen and Bio-methane production of anaerobic membrane bioreactor from waste activated sludge with digestate recirculation

被引:22
作者
Li, Wanjiang [1 ,2 ]
Cai, Teng [1 ]
Lu, Xueqin [1 ,3 ,4 ,8 ]
Han, Yule [1 ]
Kudisi, Dilibaierkezi [1 ]
Chang, Guohua [2 ]
Dong, Ke [7 ]
Zhen, Guangyin [1 ,3 ,5 ,6 ,8 ]
机构
[1] East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200241, Peoples R China
[2] Lanzhou City Univ, Coll Urban Environm, Engn Res Ctr Min Pollut Treatment & Ecol Restorat, Lanzhou 730070, Gansu, Peoples R China
[3] Shanghai Engn Res Ctr Biotransformat Organ Solid W, Shanghai 200241, Peoples R China
[4] Inst Ecochongming, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China
[5] Shanghai Inst Pollut Control & Ecol Secur, 1515 North Zhongshan Rd 2, Shanghai 200092, Peoples R China
[6] Minist Nat Resources, Technol Innovat Ctr Land Spatial Ecorestorat Metro, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China
[7] Kyonggi Univ, Suwon, South Korea
[8] East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Dongchuan Rd 500, Shanghai 200241, Peoples R China
基金
中国国家自然科学基金;
关键词
Two-phase anaerobic digestion; Recirculation ratio; Hydrogen; Methane; Microbial community; MICROBIAL COMMUNITY STRUCTURE; FOOD WASTE; BIOHYTHANE PRODUCTION; DARK-FERMENTATION; PRETREATMENT; PERFORMANCE; TEMPERATURE; MORPHOLOGY; CONVERSION; WATER;
D O I
10.1016/j.cej.2022.139547
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The conventional recirculated two-phase anaerobic digestion (R-TPAD) equipped with two continuous stirred tank reactors (CSTR) usually shows poor water quality, insufficient bioconversion degree and low methane productivity. In this study, a new R-TPAD with CSTR as acidogenic phase and anaerobic membrane reactor (AnMBR) as methanogenic phase was constructed to digest waste activated sludge (WAS) for renewable energy recovery (H2 and CH4). The effects of recirculation ratio (R) on start-up time, long-term performance, membrane fouling behaviors, microbial community evolution, and energy recovery efficiencies were investigated system-atically. Result showed that the R-TPAD possessed high H2 (6.1 mL/g-COD) and CH4 (67.9 mL/g-COD) yields with the corresponding COD removal of up to 96.1% at R0.2. During the whole process, the transmembrane pressure was lower than-3.3 kPa with negligible membrane fouling observed. The 16S rRNA gene analysis revealed that the synergistic role of membrane separation and recirculation system promoted the proliferation of fatty acids-producing and organics-degrading bacteria (i.e. Coprothermobacteraeota, Bacteroidetes, etc.) in acidogenic phase and CH4-producing methanogens (i.e. Methanobacterium, Methanosaeta, etc.) in methanogenic phase, thus accelerating the biodegradation of WAS. This positive stimulation sustained the high diversity and the dynamic balance of key microorganisms in the R-TPAD process. Energy balance analysis further indicated that the R-TPAD with R0.2 could increase net energy output by 77.9% compared to the control TPAD without recirculation. This work provides a fundamental data base for the scientific management of WAS and push forward the real-world application of R-TPAD technology in the real-world scenarios.
引用
收藏
页数:13
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