Influence of attapulgite addition on the biological performance and microbial communities of submerged dynamic membrane bioreactor
| Autor: | Xiaoguang Xu, Qigui Niu, Wei Li, Wensong Duan, Dafang Fu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0208 environmental biotechnology
Filtration and Separation 02 engineering and technology 010501 environmental sciences Biology polymerase chain reaction-denaturing gradient gel electrophoresis Membrane bioreactor 01 natural sciences bacterial community lcsh:Water supply for domestic and industrial purposes Microbial ecology dynamic membrane bioreactor Dissolved organic carbon Effluent 0105 earth and related environmental sciences Water Science and Technology lcsh:TD201-500 Chemical oxygen demand Environmental engineering Obligate anaerobe biology.organism_classification attapulgite 020801 environmental engineering Microbial population biology Environmental chemistry Proteobacteria 16S rRNA gene cloning |
| Zdroj: | Journal of Water Reuse and Desalination, Vol 7, Iss 4, Pp 488-501 (2017) |
| ISSN: | 2408-9370 2220-1319 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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