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Title: Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester
Authors: Chen, Yun
Xiao, Keke
Jiang, Xie
Shen, Nan
Zeng, Raymond J.
Zhou, Yan
Keywords: Engineering::Civil engineering
Issue Date: 2017
Source: Chen, Y., Xiao, K., Jiang, X., Shen, N., Zeng, R. J., & Zhou, Y. (2018). Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester. Bioresource Technology, 247, 724-729. doi:10.1016/j.biortech.2017.09.153
Journal: Bioresource Technology
Abstract: In this study, a thermophilic (65°C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6days with methane yield of 186.16mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system.
ISSN: 0960-8524
DOI: 10.1016/j.biortech.2017.09.153
Rights: © 2017 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:NEWRI Journal Articles

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