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Bioresour Technol

Title:		Effects of carbon source on methanogenic activities and pathways incorporating metagenomic analysis of microbial community
Author(s):		Xing L; Yang S; Yin Q; Xie S; Strong PJ; Wu G;
Address:		"School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China. Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China. Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW 2522, Australia. Queensland University of Technology, GPO Box 2432, 2 George St, Brisbane, QLD 4001, Australia. Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China. Electronic address: wu.guangxue@sz.tsinghua.edu.cn"
Journal Title:		Bioresour Technol
Year:		2017
Volume:		20170812
Issue:		Pt 1
Page Number:		982 - 988
DOI:		10.1016/j.biortech.2017.08.065
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"In this study, the effects of four types of organic compounds (tryptone, acetate/propionate, glucose and ethanol) on methanogenesis, electron transfer processes and microbial community structure were examined. When tryptone and acetate/propionate were used, the dominant methanogenic pathway was aceticlastic methanogenesis and Methanosarcina was the most abundant methanogen. When glucose or ethanol were provided as the external carbon source, the aceticlastic and hydrogenotrophic pathways were utilised simultaneously, and Methanosarcina and Methanobacterium were enriched. However, the reactor fed with glucose was prone to acidification because volatile fatty acids accumulated in the medium, which inhibited methane synthesis. Geobacter was dominant in the reactor fed with ethanol and 45% of genes encoding pili synthesis were attributable to Geobacter, indicating that direct interspecies electron transfer may be a possible mechanism during syntrophic methanogenesis"
Keywords:		Bioreactors *Carbon Geobacter Metagenomics *Methane *Methanosarcina Organic Chemicals Carbon sources Electron transfer Metagenome Methanogenesis;
Notes:		"MedlineXing, Lizhen Yang, Shuo Yin, Qidong Xie, Sihuang Strong, Peter James Wu, Guangxue eng England 2017/08/30 Bioresour Technol. 2017 Nov; 244(Pt 1):982-988. doi: 10.1016/j.biortech.2017.08.065. Epub 2017 Aug 12"