Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers

作     者：Wenkai Li Tianlong Zheng Yingqun Ma Junxin Liu Wenkai Li;Tianlong Zheng;Yingqun Ma;Junxin Liu

作者机构：State Key Joint Laboratory of Environment Simulation and Pollution ControlResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of SciencesBeijing 100049China Advanced Environmental Biotechnology CentreNanyang Environment&Water Research InstituteNanyang Technological UniversitySingapore637141Singapore 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2020年第32卷第4期

页      面：1-9页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51838013,51808536) the National Key R&D Program of China(No.2016YFC0400804) 

主　　题：Bacterial community Biofilms Functional bacteria Rural area Small diameter gravity sewers 

摘      要：Small diameter gravity sewers(SDGS)are extensively used to collect rural sewage as they are low in cost and quick to ***,the characteristics of biofilms in rural SDGS are still not *** this study,biofilms characteristics of aerobic rural SDGS were investigated using simulations in a lab under different flow conditions and *** indic ated that the average thickness of aerobic rural SDGS biofilms was in the range of 350-650μm,decreasing at locations with variable flow and high *** was the most abundant substance in extracellular polymeric substance of SDGS *** most abundant bacteria,Proteobacteria,Actinobacteria,and Bacteroidetes,and functional bacteria showed different distributions when analyzed through Illumina HiSeq sequencing of 16 S *** relative abundances of denitrifying bacteria,nitrite-oxidizing bacteria,and sulfate-reducing bacteria(SRB)were lower during variable flow than during stable *** slopes(15‰)decreased SRB presence,which could be used to mitigate H2 S accumulation in aerobic ***,this study describes the characteristics of aerobic rural SDGS biofilms and provides valuable suggestions for the optimal design of SDGS based on these characteristics.