Wang Mengyu, An Ying, Huang Jing, Sun Xiao, Yang Aming, Zhou Zhen
Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
Bioresour Technol. 2021 Dec;342:125931. doi: 10.1016/j.biortech.2021.125931. Epub 2021 Sep 15.
Three anoxic/oxic membrane bioreactors (AO-MBRs) coupled with the anaerobic side-stream reactor (ASSR) with different influent flow distribution ratios (IFDRs) were assessed to elucidate how IFDR in the ASSR affected pollutants removal, sludge reduction, membrane fouling, and potential co-occurrence network of microorganisms. When the IFDR in the ASSR was increased from 0% (ASSR-MBR), to 25% (ASSR-MBR) and 75% (ASSR-MBR), chemical oxygen demand removal was enhanced and nutrient removal was comparable. Compared to ASSR-MBR, ASSR- and ASSR-MBR further improved the sludge reduction by 7.6% and 10.9%, respectively. ASSR-MBR followed cake-complete model due to the weak membrane surface scouring and high concentration of extracellular polymeric substances, while ASSR- and ASSR-MBR fitted cake-standard model. The increased IFDR in the ASSR boosted the relative abundance of hydrolytic and slow-growing bacteria. The co-occurrence networks of sludge reduction, nutrient removal and membrane fouling propensity indicated that the symbiotic relationships were dominant.
评估了三个缺氧/好氧膜生物反应器（AO-MBR）与具有不同进水流量分配比（IFDR）的厌氧侧流反应器（ASSR）相结合的系统，以阐明ASSR中的IFDR如何影响污染物去除、污泥减量、膜污染以及微生物潜在的共现网络。当ASSR中的IFDR从0%（ASSR-MBR）增加到25%（ASSR-MBR）和75%（ASSR-MBR）时，化学需氧量去除率提高，营养物去除效果相当。与ASSR-MBR相比，ASSR-和ASSR-MBR分别进一步提高了7.6%和10.9%的污泥减量。由于膜表面冲刷较弱和胞外聚合物浓度较高，ASSR-MBR遵循饼层完全模型，而ASSR-和ASSR-MBR符合饼层标准模型。ASSR中增加的IFDR提高了水解菌和生长缓慢细菌的相对丰度。污泥减量、营养物去除和膜污染倾向的共现网络表明共生关系占主导。
