Shifts in microbial community structure and diversity in a MBR combined with worm reactors treating synthetic wastewater

作     者：Jia Liu Wei Zuo Jun Zhang Hui Li Lipin Li Yu Tian 

作者机构：State Key Laboratory of Urban Water Resource and Environment(SKLUWRE)School of Municipal and Environmental EngineeringHarbin Institute of Technology 

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

年 卷 期：2017年第29卷第4期

页      面：246-255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 Major Science and Technology Program for Water Pollution Control and Management(No.2013ZX07201007) the State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(No.2014DX03) the Science Fund for Distinguished Young Scholars of Heilongjiang Province(No.JC201303) 

主　　题：Membrane bioreactor(MBR) Enzyme activities Microbial community structure 

摘      要：The chemical oxygen demand（COD） and NH3-N removal, membrane fouling, sludge characteristics and microbial community structure in a membrane bioreactor（MBR） coupled with worm reactors（SSBWR） were evaluated for 210 days. The obtained results were compared to those from a conventional MBR（C-MBR） operated in parallel. The results indicated that the combined MBR（S-MBR） achieved higher COD and NH3-N removal efficiency,slower increase in membrane fouling, better sludge settleability and higher activities of the related enzymes in the activated sludge. Denaturing gradient gel electrophoresis was used to analyze the microbial community structures in the C-MBR and the S-MBR. The microbial community structure in the S-MBR was more diverse than that in the C-MBR. Additionally, the slow-growing microbes such as Saprospiraceae, Actinomyces, Frankia, Clostridium, Comamonas,Pseudomonas, Dechloromonas and Flavobacterium were enriched in the S-MBR, further accounting for the sludge reduction, membrane fouling alleviation and wastewater treatment.