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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ning, Xinqiang Qiao, Wenwen Zhang, Lei Gao, Xu |
| Description | Author Affiliation: Ning X ( a Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, People's Republic of China.) |
| Abstract | Modification of the anoxic-oxic (AO) process by inserting a sludge holding tank (SHT) into the sludge return line forms an anoxic-oxic-settling-anaerobic (A+OSA) process that can achieve a 48.98% sludge reduction rate. The 454 pyrosequencing method was used to obtain the microbial communities of the AO and A+OSA processes. Results showed that the microbial community structures of the 2 processes were different as a result of the SHT insertion. Bacteria assigned to the phyla Proteobacteria and Bacteroidetes commonly existed and dominated the microbial populations of the 2 processes. However, the relative abundance of these populations shifted in the presence of SHT. The relative abundance of Proteobacteria decreased during the A+OSA process. A specific comparison at the class level showed that Sphingobacteria was enriched in the A+OSA process. The result suggested that the fermentative bacteria Sphingobacteria may have key functions in reducing the sludge from the A+OSA process. Uncultured Nitrosomonadaceae gradually became the dominant ammonia-oxidizing bacteria, and the nitrite-oxidizing bacterium Nitrospira was enriched in the A+OSA process. Both occurrences were favorable for stabilized nitrogen removal. The known denitrifying species in the A+OSA process were similar to those in the AO process; however, their relative abundance also decreased. |
| File Format | HTM / HTML |
| ISSN | 00084166 |
| e-ISSN | 14803275 |
| Journal | Canadian Journal of Microbiology |
| Issue Number | 12 |
| Volume Number | 60 |
| Language | English |
| Publisher | Canadian Science Publishing |
| Publisher Date | 2014-12-01 |
| Publisher Place | Canada |
| Access Restriction | Open |
| Subject Keyword | Discipline Microbiology Bacteroidetes Physiology Microbiota Proteobacteria Sewage Microbiology Waste Disposal, Fluid Waste Water Aerobiosis Anaerobiosis Classification Genetics Isolation & Purification Bioreactors Genes, Rrna Phylogeny Rna, Ribosomal, 16s Sequence Analysis, Dna Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Medicine Molecular Biology Immunology Microbiology Applied Microbiology and Biotechnology |
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