Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7070304 | Bioresource Technology | 2016 | 4 Pages |
Abstract
In this study, we evaluated the performance of an anaerobic membrane bioreactor in terms of digestion and thickening of excess sludge from an aerobic membrane bioreactor. A digestion reactor equipped with an external polytetrafluoroethylene tubular microfiltration membrane module was operated in semi-batch mode. Solids were concentrated by repeated membrane filtration and sludge feeding, and their concentration reached 25,400Â mg/L after 92Â d. A high chemical oxygen demand (COD) removal efficiency, i.e., 98%, was achieved during operation. A hydraulic retention time of 34Â d and a pulse organic loading rate of 2200Â mg-COD/(L-reactor) gave a biogas production rate and biogas yield of 1.33Â L/(reactor d) and 0.08Â L/g-CODinput, respectively. The external membrane unit worked well without membrane cleaning for 90Â d. The transmembrane pressure reached 25Â kPa and the filtration flux decreased by 80% because of membrane fouling after operation for 90Â d.
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Authors
Akira Hafuka, Kazuhisa Mimura, Qing Ding, Hiroshi Yamamura, Hisashi Satoh, Yoshimasa Watanabe,