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论文类型：期刊论文

发表时间：2015-09-01

发表刊物：BIORESOURCE TECHNOLOGY

收录刊物：ESI高被引论文、SCIE、EI、PubMed、Scopus

卷号：191

页面范围：140-145

ISSN号：0960-8524

关键字：Syntrophic metabolism; Conductive carbon materials; Direct interspecies electron transfer; Up-flow anaerobic sludge blanket

摘要：Syntrophic metabolism of alcohols and fatty acids is a critical step in anaerobic digestion, which if enhanced can better stabilize the process and enable shorter retention times. Direct interspecies electron transfer (DIET) has recently been recognized as an alternative route to hydrogen interspecies transfer as a mechanism for interspecies syntrophic electron exchange. Therefore, the possibility of accelerating syntrophic metabolism of ethanol in up-flow anaerobic sludge blanket (UASB) reactors by incorporating conductive materials in reactor design was investigated. Graphite, biochar, and carbon cloth all immediately enhanced methane production and COD removal. As the hydraulic retention time was decreased the increased effectiveness of treatment in reactors with conductive materials increased versus the control reactor. When these conductive materials were removed from the reactors rates of syntrophic metabolism declined to rates comparable to the control reactor. These results suggest that incorporating conductive materials in the design of UASB reactors may enhance digester effectiveness. (C) 2015 Elsevier Ltd. All rights reserved.