Influence of attapulgite addition on the biological performance and microbial communities of submerged dynamic membrane bioreactor

Journal of Water Reuse and Desalination

Duan, Wensong¹  Xu, Xiaoguang²  Li, Wei³  Niu, Qigui³  Fu, Dafang⁴ 

[1] College of Environmental Science and Engineering, Anhui Normal University, Wuhu 241003, China;Department of Civil and Environmental Engineering, Graduate School of Engineering Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;Department of Municipal Engineering, Southeast University, Nanjing 210096, China;School of Environment, Nanjing Normal University, Nanjing 210023, China

关键词: 16S rRNA gene cloning;    attapulgite;    bacterial community;    dynamic membrane bioreactor;    polymerase chain reaction-denaturing gradient gel electrophoresis;   

DOI  :  10.2166/wrd.2016.133

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

A submerged dynamic membrane bioreactor (sDMBR) was developed to test the influence of attapulgite (AT) addition on the treatment performances and the microbial community structure and function. The batch experimental results displayed the highest UV254 and dissolved organic carbon (DOC) removal efficiencies with 5% AT/mixed liquid suspended solids addition dosage. The continuous sDMBR results showed that the removal efficiencies of chemical oxygen demand, NH4+-N, total nitrogen and total phosphorus significantly increased in the AT added sDMBR. Excitation emission matrix analysis demonstrated that the protein-like peaks and fulvic acid-like peaks were significantly decreased in both in the mixed liquid and the effluent of the AT added reactor. The obligate anaerobes were observed in the sDMBR with AT addition, such as Bacteroidetes and Gamma proteobacterium in the dynamic membrane, which played an important role in the process of sludge granulation. Bacterial community richness significantly increased after AT addition with predominated phyla of Proteobacteria and Bacteroidetes. Similarly, species abundance significantly increased in the AT added sDMBR. Further investigations with cluster proved that AT was a favorite biological carrier for the microbial ecology, which enriched microbial abundance and community diversity of the sDMBR.

【 授权许可】

CC BY-NC-ND