Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 水污染控制实验室

	Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers
	Li, Wenkai; Zheng, Tianlong; Ma, Yingqun; Liu, Junxin
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2020-04
卷号	90 页码:1-9
关键词	Bacterial community Biofilms Functional bacteria Rural area Small diameter gravity sewers
ISSN号	1001-0742
英文摘要	Small diameter gravity sewers (SDGS) are extensively used to collect rural sewage as they are low in cost and quick to construct. However, the characteristics of biofilms in rural SDGS are still not clear. In this study, biofilms characteristics of aerobic rural SDGS were investigated using simulations in a lab under different flow conditions and slopes. Results indicated that the average thickness of aerobic rural SDGS biofilms was in the range of 350-650 mu m, decreasing at locations with variable flow and high slopes. Protein was the most abundant substance in extracellular polymeric substance of SDGS biofilms. The most abundant bacteria, Proteobacteria, Actinobacteria, and Bacteroidetes, and functional bacteria showed different distributions when analyzed through Illumina HiSeq sequencing of 16S rRNA. The relative abundances of denitrifying bacteria, nitrite-oxidizing bacteria, and sulfate-reducing bacteria (SRB) were lower during variable flow than during stable flow. High slopes (15 parts per thousand) decreased SRB presence, which could be used to mitigate H2S accumulation in aerobic SDGS. Overall, this study describes the characteristics of aerobic rural SDGS biofilms and provides valuable suggestions for the optimal design of SDGS based on these characteristics. (C) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45020]
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	Li, Wenkai,Zheng, Tianlong,Ma, Yingqun,et al. Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,90:1-9.
APA	Li, Wenkai,Zheng, Tianlong,Ma, Yingqun,&Liu, Junxin.(2020).Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers.JOURNAL OF ENVIRONMENTAL SCIENCES,90,1-9.
MLA	Li, Wenkai,et al."Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers".JOURNAL OF ENVIRONMENTAL SCIENCES 90(2020):1-9.