期刊
BIORESOURCE TECHNOLOGY
卷 272, 期 -, 页码 63-69出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.147
关键词
Anaerobic digestion; Biogas; Cross-flow filtration; Membrane fouling; Polytetrafluoroethylene membrane
资金
- Japan Society for the Promotion of Science [16H04440, 18K13860]
- Grants-in-Aid for Scientific Research [16H04440, 18K13860] Funding Source: KAKEN
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.
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