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论文类型：期刊论文

发表时间：2016-12-01

发表刊物：BIORESOURCE TECHNOLOGY

收录刊物：SCIE、EI、PubMed、Scopus

卷号：222

页面范围：270-276

ISSN号：0960-8524

关键字：Incineration leachate; Direct interspecies electron transfer; Carbon cloth; Methanogenesis; Extracellular electron transfer

摘要：Bio-methanogenic digestion of incineration leachate is hindered by high OLRs, which can lead to build-up of VFAs, drops in pH and ultimately in reactor souring. It was hypothesized that incorporation of carbon cloth into reactors treating leachate would promote DIET and enhance reactor performance. To examine this possibility, carbon cloth was added to laboratory-scale UASB reactors that were fed incineration leachate. As expected, the carbon-cloth amended reactor could operate stably with a 34.2% higher OLR than the control (49.4 vs 36.8 kg COD/(m(3) d)). Microbial community analysis showed that bacteria capable of extracellular electron transfer and methanogens known to participate in DIET were enriched on the carbon cloth surface, and conductivity of sludge from the carbon cloth amended reactor was almost twofold higher than sludge from the control (9.77 vs 5.47 mu S/cm), suggesting that microorganisms in the experimental reactor may have been expressing electrically conductive filaments. (C) 2016 Elsevier Ltd. All rights reserved.