Anaerobic treatment of glutamate-rich wastewater in a continuous UASB reactor: Effect of hydraulic retention time and methanogenic degradation pathway

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	Anaerobic treatment of glutamate-rich wastewater in a continuous UASB reactor: Effect of hydraulic retention time and methanogenic degradation pathway
	Chen, Hong; Wei, Yanxiao; Xie, Chenglei; Wang, Hong; Chang, Sheng; Xiong, Ying; Du, Chunyan; Xiao, Benyi; Yu, Guanlong
刊名	CHEMOSPHERE
	2020-04
卷号	245 页码:1-7
关键词	3-Methylaspartate pathway Biodegradation Glutamate fermentation Methanogenesis Upflow anaerobic sludge blanket
ISSN号	0045-6535
英文摘要	To investigate the anaerobic treatment efficiency and degradation pathways of glutamate-rich wastewater under various hydraulic retention times (HRTs), a lab-scale upflow anaerobic sludge blanket (UASB) reactor was operated continuously for 180 days. Results showed that high chemical oxygen demand (COD) removal efficiencies of 95.5%-96.5% were achieved at HRTs of 4.5 h-6 h with a maximum methane yield of 0.31 L-CH4/g-COD. When the HRT was shortened to less than 3 h, the removal performance of the reactor declined. There also was an excessive accumulation of volatile fatty acids, which implies that an appropriately small HRT is applicable to the UASB reactor treating glutamate-rich wastewater. Methanogenic degradation of glutamate in the UASB reactor depended on the HRT applied, and the typical methane-producing capability of the sludge at an HRT of 3 h, in descending order, was acetate > glutamate > butyrate > H-2/CO2 > valerate > propionate. Clostridium and Methanosaeta were predominant in the glutamate-degrading sludge. At least three degradation pathways most likely existed in the UASB reactor, and the pathway via 3-methlaspartate by Clostridium pascui was expected to be dominant. (C) 2019 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45016]
专题	生态环境研究中心_水污染控制实验室
推荐引用方式 GB/T 7714	Chen, Hong,Wei, Yanxiao,Xie, Chenglei,et al. Anaerobic treatment of glutamate-rich wastewater in a continuous UASB reactor: Effect of hydraulic retention time and methanogenic degradation pathway[J]. CHEMOSPHERE,2020,245:1-7.
APA	Chen, Hong.,Wei, Yanxiao.,Xie, Chenglei.,Wang, Hong.,Chang, Sheng.,...&Yu, Guanlong.(2020).Anaerobic treatment of glutamate-rich wastewater in a continuous UASB reactor: Effect of hydraulic retention time and methanogenic degradation pathway.CHEMOSPHERE,245,1-7.
MLA	Chen, Hong,et al."Anaerobic treatment of glutamate-rich wastewater in a continuous UASB reactor: Effect of hydraulic retention time and methanogenic degradation pathway".CHEMOSPHERE 245(2020):1-7.