Co-optimization of sponge-core bioreactors for removing total nitrogen and antibiotic resistance genes from domestic wastewater

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	Co-optimization of sponge-core bioreactors for removing total nitrogen and antibiotic resistance genes from domestic wastewater
	Jong, Mui-Choo; Su, Jian-Qiang; Bunce, Joshua T.; Harwood, Colin R.; Snape, Jason R.; Zhu, Yong-Guan; Graham, David W.
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-09-01
卷号	634 页码:1417-1423
关键词	Antibiotic resistance genes Sustainable wastewater treatment Wastewater bypass Denitrification High-throughput qPCR
ISSN号	0048-9697
文献子类	Article
英文摘要	Inadequate sanitation can lead to the spread of infectious diseases and antimicrobial resistance (AMR) via contaminated water. Unfortunately, wastewater treatment is not universal in many developing and emerging countries, especially in rural and peri-urban locations that are remote from central sewers. As such, small-scale, more sustainable treatment options are needed, such as aerobic-Denitrifying Downflow Hanging Sponge (DDHS) bioreactors. In this study, DDHS reactors were assessed for such applications, and achieved over 79% and 84% removal of Chemical Oxygen Demand and Ammonium, respectively, and up to 71% removal of Total Nitrogen (TN) from domestic wastes. Elevated TN removals were achieved via bypassing a fraction of raw wastewater around the top layer of the DDHS system to promote denitrification. However, itwas not known how this bypass impacts AMR gene (ARG) and mobile genetic element (MGE) levels in treated effluents. High-throughput qPCR was used to quantify ARG and MGE levels in DDHS bioreactors as a function of percent bypass (0, 10, 20 and 30% by volume). All systems obtained over 90% ARG reduction, although effluent ARG and TN levels differed among bypass regimes, with co-optimal reductions occurring at similar to 20% bypass. ARG removal paralleled bacterial removal rate, although effluent bacteria tended to have greater genetic plasticity based on higher apparent MGE levels per cell. Overall, TN removal increased and ARG removal decreased with increasing bypass, therefore co-optimization is needed in each DDHS application to achieve locally targeted TN and AMR effluent levels. (C) 2018 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41215]
专题	生态环境研究中心_土壤环境科学实验室
推荐引用方式 GB/T 7714	Jong, Mui-Choo,Su, Jian-Qiang,Bunce, Joshua T.,et al. Co-optimization of sponge-core bioreactors for removing total nitrogen and antibiotic resistance genes from domestic wastewater[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,634:1417-1423.
APA	Jong, Mui-Choo.,Su, Jian-Qiang.,Bunce, Joshua T..,Harwood, Colin R..,Snape, Jason R..,...&Graham, David W..(2018).Co-optimization of sponge-core bioreactors for removing total nitrogen and antibiotic resistance genes from domestic wastewater.SCIENCE OF THE TOTAL ENVIRONMENT,634,1417-1423.
MLA	Jong, Mui-Choo,et al."Co-optimization of sponge-core bioreactors for removing total nitrogen and antibiotic resistance genes from domestic wastewater".SCIENCE OF THE TOTAL ENVIRONMENT 634(2018):1417-1423.