Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure
	Zhang, Yu; Chen, Zhimin; An, Wei; Xiao, Shumin; Yuan, Hongying; Zhang, Dongqing; Yang, Min
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2015-04-01
卷号	30 页码:252-258
关键词	Giardia Reclaimed water Water quality Risk Genotype
英文摘要	Membrane bioreactors (MBR) are highly efficient at intercepting particles and microbes and have become an important technology for wastewater reclamation. However, many pathogens can accumulate in activated sludge due to the long residence time usually adopted in MBR, and thus may pose health risks when membrane integrity problems occur. This study presents data from a survey on the occurrence of water-borne Giardia pathogens in reclaimed water from a full-scale wastewater treatment plant with MBR experiencing membrane integrity failure, and assessed the associated risk for green space irrigation. Due to membrane integrity failure, the MBR effluent turbidity varied between 0.23 and 1.90 NTU over a period of eight months. Though this turbidity level still met reclaimed water quality standards (<= 5 NTU), Giardia were detected at concentrations of 0.3 to 95 cysts/10 L, with a close correlation between effluent turbidity and Giardia concentration. All beta-giardin gene sequences of Giardia in the WW'PP influents were genotyped as Assemblages A and B, both of which are known to infect humans. An exponential dose response model was applied to assess the risk of infection by Giardia. The risk in the MBR effluent with chlorination was 9.83 x 10(-3), higher than the acceptable annual risk of 1.0 x 10(-4). This study suggested that membrane integrity is very important for keeping a low pathogen level, and multiple barriers are needed to ensure the biological safety of MBR effluent. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
研究领域[WOS]	Environmental Sciences
WOS记录号	WOS:000353844800031
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32841]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhang, Yu,Chen, Zhimin,An, Wei,et al. Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2015,30:252-258.
APA	Zhang, Yu.,Chen, Zhimin.,An, Wei.,Xiao, Shumin.,Yuan, Hongying.,...&Yang, Min.(2015).Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,30,252-258.
MLA	Zhang, Yu,et al."Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 30(2015):252-258.