Abstract The study evaluated the microbial behavior of a submerged super fast membrane reactor (SFMBR) with settled sewage and a soluble synthetic substrate (peptone mixture) exhibiting similar biodegradation characteristics with sewage. A laboratory scale SFMBR was run at very low sludge retention times of 0.5–2.0 d and a hydraulic retention time of 8 h. Effluent COD was always lower than the soluble COD in the reactor and remained in the range 14–28 mg/L for the peptone mixture and 36–44 mg/L for settled sewage. Significant characteristics of SFMBR performance were assessed by particle size distribution analysis; respirometry; modeling defining related process kinetics; and molecular analysis, which revealed changes in microbial community composition under different operating conditions. Model simulation was also performed for raw sewage for revealing COD fractionation in the permeate and biomass in the reactor for the same operating conditions. The results indicated, as predicted, partial removal of the particulate slowly biodegradable COD fraction while soluble biodegradable COD components were almost totally removed. Modeling also highlighted energy conservation and recovery as the major feature of SFMBR, which was assessed to vary between 54% and 77%, a range significantly higher than what can be achieved with different activated sludge alternatives.

中文翻译：

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一种最大化生物处理节能潜力的新工艺：超快速膜生物反应器

摘要 本研究评估了浸没式超快膜反应器 (SFMBR) 与沉降的污水和具有与污水相似的生物降解特性的可溶性合成底物（蛋白胨混合物）的微生物行为。实验室规模的 SFMBR 在 0.5-2.0 天的极低污泥停留时间和 8 小时的水力停留时间下运行。出水 COD 始终低于反应器中的可溶性 COD，蛋白胨混合物保持在 14–28 mg/L 范围内，沉淀污水保持在 36–44 mg/L 范围内。通过粒度分布分析评估 SFMBR 性能的显着特征；呼吸测量法；建模定义相关的过程动力学；分子分析揭示了不同操作条件下微生物群落组成的变化。还对原污水进行了模型模拟，以揭示在相同操作条件下反应器中渗透液和生物质中的 COD 分馏。结果表明，正如预测的那样，部分去除了可缓慢生物降解的颗粒状 COD 部分，而几乎完全去除了可溶性可生物降解的 COD 成分。建模还强调了节能和回收是 SFMBR 的主要特征，经评估在 54% 到 77% 之间变化，这个范围明显高于不同活性污泥替代品所能达到的范围。