A MBR treating compost leachate was studied in order to link the operating parameters (solid and hydraulic retention time) to contaminant's specific bacterial catabolic activity. In this context, a lab-scale aerobic membrane bioreactor was operated for 200 days, at solid retention times (SRT) of 30 and 45 days and four different contaminant load rates. Results showed that increasing the food to microorganism ratio (F/M) by increasing the contaminant load rates lessened the selectivity pressure, which allowed the proliferation of subdominant operational taxonomic units (OTU) (relative abundance >3%) that were otherwise inhibited by highly adapted dominant OTUs (relative abundance >10%). Subsequently, increasing the SRT resulted in a lower species richness and the selection of two dominant types of bacteria: 1) genera with low growth rates that feed on non-limiting substrates or substrates with few competitors, and 2) genera with metabolisms that are highly specific to the available substrates and that can outcompete the other genera by using the substrate more efficiently. The bacterial population evolution observed during this study suggests that the mixed liquor population diversity and structure can be modulated with the operating conditions for the bioenhancement of contaminant specific catabolic activity. Identified dominant and subdominant genera were linked to the sMBR's NH₄⁺ and COD removal performances. Interestingly, nitrification performances were unaffected by the organic load rate and the Nitrosomonas relative abundance.

为了将操作参数（固体和水力停留时间）与污染物的特定细菌分解代谢活性联系起来，对MBR处理堆肥渗滤液进行了研究。在这种情况下，实验室规模的好氧膜生物反应器在30和45天的固体保留时间（SRT）和四种不同的污染物负载率下运行200天。结果表明，通过增加污染物负荷率来提高食物与微生物的比例（F / M）会降低选择压力，从而使主要的操作生物分类单位（OTU）增殖（相对丰度> 3％），而这些原本受高度抑制改编的主要OTU（相对丰度> 10％）。随后，增加SRT导致物种丰富度降低，并选择了两种主要细菌：1）具有低生长速度的属以非限制性底物或竞争者较少的底物为食，和2）具有对可用底物高度特异的代谢的属，并且通过更有效地使用底物可以与其他属竞争。在这项研究中观察到的细菌种群进化表明，混合液种群的多样性和结构可以通过操作条件来调节，以提高污染物的特定分解代谢活性。确定的优势和次要属与sMBR的NH相关 在这项研究中观察到的细菌种群进化表明，混合液种群的多样性和结构可以通过操作条件来调节，以提高污染物的特定分解代谢活性。确定的优势和次要属与sMBR的NH相关 在这项研究中观察到的细菌种群进化表明，混合液种群的多样性和结构可以通过操作条件来调节，以提高污染物的特定分解代谢活性。确定的优势和次要属与sMBR的NH相关₄ ⁺和COD去除性能。有趣的是，硝化性能不受有机负荷率和亚硝化单胞菌相对丰度的影响。