水力停留时间对厌氧侧流反应器耦合膜生物反应器工艺性能的影响：动力学模型、污泥减量机制和微生物群落结构。
Effects of hydraulic retention time on process performance of anaerobic side-stream reactor coupled membrane bioreactors: Kinetic model, sludge reduction mechanism and microbial community structures.
机构信息
College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
出版信息
Bioresour Technol. 2018 Nov;267:218-226. doi: 10.1016/j.biortech.2018.07.047. Epub 2018 Jul 10.
An anoxic/oxic membrane bioreactor (AO-MBR) and three anaerobic side-stream reactor (ASSR) coupled MBRs (ASSR-MBR) were operated to investigate the effects of hydraulic retention time of ASSR (HRT) and to elucidate sludge reduction mechanisms in ASSR-MBRs. Increasing HRT from 3.3 to 6.6 h improved nitrogen removal, and enhanced sludge reduction from 8.0% to 40.9% in ASSR-MBR. The sludge decay coefficient was 0.0221 d in MBRs, and 0.0231-0.0345 d in ASSRs. The measured lysis rate coefficient of heterotrophic biomass was 0.083-0.112 d in MBRs and 0.079-0.111 d in ASSRs. The hydrolysis rate coefficient of inactive particulate organic matters (POMs) in ASSRs significantly exceeded that in the MBR. At HRT of 6.6 h, POMs hydrolysis in ASSR (38.6%) is the dominant route of sludge reduction, and cell lysis occurred principally in aerobic tanks. Illumina-MiSeq sequencing showed ASSR-MBRs enriched hydrolytic and fermentative bacteria, and confirmed that anaerobic hydrolysis contributed most to sludge reduction.
缺氧/好氧膜生物反应器（AO-MBR）和三个厌氧侧流反应器（ASSR）耦合的 MBR（ASSR-MBR）被运行，以研究 ASSR 的水力停留时间（HRT）的影响，并阐明 ASSR-MBR 中的污泥减少机制。将 ASSR-MBR 中的 ASSR 的水力停留时间从 3.3 小时增加到 6.6 小时，提高了氮的去除率，并将污泥减少率从 8.0%提高到 40.9%。MBR 中的污泥衰减系数为 0.0221 d，ASSR 中的污泥衰减系数为 0.0231-0.0345 d。在 MBR 和 ASSR 中，异养生物质的测量裂解速率系数分别为 0.083-0.112 d 和 0.079-0.111 d。ASSR 中惰性颗粒有机物质（POM）的水解速率系数明显高于 MBR。在 HRT 为 6.6 小时时，ASSR 中的 POM 水解（38.6%）是污泥减少的主要途径，细胞裂解主要发生在好氧池中。Illumina-MiSeq 测序表明，ASSR-MBR 富集了水解和发酵细菌，并证实了厌氧水解对污泥减少的贡献最大。
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