This study evaluates the performance of an anaerobic membrane bioreactor (AnMBR) digesting waste activated sludge. A digestion reactor equipped with an external hollow fiber microfiltration membrane module was operated in continuous-mode for 248 days. The system demonstrated 56% volatile solids degradation at an organic loading rate of 0.40 g-VS/(L·d) in 15 days of hydraulic retention time. The average methane content in the biogas produced was 76% which is considerably high compared to that from a typical continuously stirred tank reactor. The transmembrane pressure remained under 12 kPa without membrane cleaning during the experimental period due to low filtration flux (0.01–0.07 m/d) and cross-flow-mode filtration. Ex situ membrane cleaning revealed that physically irreversible fouling was the dominant form of membrane fouling. Inorganic and organic fouling accounted for 16% and 45% of total membrane fouling, respectively.

这项研究评估厌氧膜生物反应器（AnMBR）消化废物活性污泥的性能。配有外部中空纤维微滤膜组件的消化反应器以连续模式运行248天。该系统在15天的水力停留时间内，有机负荷率为0.40 g-VS /（L·d）时，显示出56％的挥发性固体降解。产生的沼气中的平均甲烷含量为76％，与典型的连续搅拌釜式反应器相比，甲烷含量高得多。在实验期间，由于较低的过滤通量（0.01–0.07 m / d）和错流模式过滤，跨膜压力保持在12 kPa以下，无需进行膜清洁。异地膜清洗表明，物理上不可逆的结垢是膜结垢的主要形式。