Digestion performance and contributions of organic and inorganic fouling in an anaerobic membrane bioreactor treating waste activated sludge
Digestion performance and contributions of organic and inorganic fouling in an anaerobic membrane bioreactor treating waste activated sludge
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DOI：
10.1016/j.biortech.2018.09.147
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发表时间：
2019-01-01
影响因子：
11.4
通讯作者：
Watanabe, Yoshimasa
中科院分区：
文献类型：
--
作者：
Hafuka, Akira;Mashiko, Riho;Watanabe, Yoshimasa
本文研究了厌氧膜生物反应器（AnMBR）消化剩余活性污泥的性能。一个消化反应器配备了外部中空纤维微滤膜组件在连续模式下运行了248天。该系统表现出56%的挥发性固体降解有机负荷率为0.40 g-VS/（L.d）在15天的水力停留时间。所产生的沼气中的平均甲烷含量为76%，这与来自典型的连续搅拌釜反应器的甲烷含量相比相当高。由于低过滤通量（0.01-0.07 m/d）和错流模式过滤，在实验期间不进行膜清洗，跨膜压力保持在12 kPa以下。非原位膜清洗表明，物理不可逆污染是膜污染的主要形式。无机污染和有机污染分别占膜污染总量的16%和45%。
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.