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

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） operat...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2017-04, Vol.54 (4), p.246-255
Main Authors: Liu, Jia, Zuo, Wei, Zhang, Jun, Li, Hui, Li, Lipin, Tian, Yu
Format: Article
Language:English
Subjects:
Bioreactors - microbiology
Enzyme activities
MBR
Membrane bioreactor (MBR)
Microbial community structure
Waste Disposal, Fluid - methods
Waste Water - microbiology
Water Microbiology
合成废水
复合膜生物反应器
多样性
微生物群落结构
梭状芽孢杆菌
污泥沉降性能
蚯蚓
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Summary: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.
ISSN:1001-0742
1878-7320
DOI:10.1016/j.jes.2016.03.009