This study investigated the influence of sludge retention time (SRT) in three hybrid membrane bioreactors to treat domestic wastewater at different SRTs (10, 20, and 40 d) simultaneously, based on extracellular polymeric substances (EPS) analysis. The results showed that significant positive correlation existed between SRT and humic acids quantity in TB-EPS, humic acids quantity in S-EPS, DNA quantity in S-EPS, and total quantity in TB-EPS, with the correlation coefficient 0.9992, 0.9980, 0.9973, 0.9821, respectively. Significant negative correlation existed in SRT and proteins in TB-EPS, proteins quantity in S-EPS, and polysaccharose in S-EPS, with the correlation coefficient 0.9993, 0.9107, 0.8552, respectively. A high logarithmic relationship existed between supernatant turbidity and SVI. The optimal SRT was 20 d and the corresponding operational cycle of the membrane module was 109 d.

这项研究基于细胞外聚合物（EPS）分析，研究了三种混合膜生物反应器中污泥停留时间（SRT）对同时处理不同SRT（10、20和40 d）的生活污水的影响。结果表明，SRT与TB-EPS中的腐殖酸数量，S-EPS中的腐殖酸数量，S-EPS中的DNA数量，TB-EPS中的总量存在显着的正相关，相关系数分别为0.9992、0.9980，分别为0.9973和0.9821。SRT和TB-EPS中的蛋白质，S-EPS中的蛋白质数量以及S-EPS中的多糖存在显着的负相关，相关系数分别为0.9993、0.9107、0.8552。上清液浊度和SVI之间存在高对数关系。