期刊
MICROBES AND ENVIRONMENTS
卷 29, 期 3, 页码 261-268出版社
JAPANESE SOC MICROBIAL ECOLOGY, DEPT BIORESOURCE SCIENCE
DOI: 10.1264/jsme2.ME13132
关键词
EBPR; denitrifying phosphorous removal; microbial community; pyrosequencing
资金
- China Major Science and Technology Program for Water Pollutant Control and Treatment [2012ZX07313001]
- National Natural Science Foundation of China [31200104]
- Shenzhen Basic Research Project [JC201105160582A]
- Guangdong Natural Science Foundation [S2012040006350]
- China Postdoctoral Science Foundation [2012M510975]
Denitrifying phosphorus removal is an attractive wastewater treatment process due to its reduced carbon source demand and sludge minimization potential. Two lab-scale sequencing batch reactors (SBRs) were operated in alternating anaerobic-anoxic (A-A) or anaerobic-oxic (A-O) conditions to achieve denitrifying enhanced biological phosphate removal (EBPR) and traditional EBPR. No significant differences were observed in phosphorus removal efficiencies between A-A SBR and A-O SBR, with phosphorus removal rates being 87.9% and 89.0% respectively. The community structures in denitrifying and traditional EBPR processes were evaluated by high-throughput sequencing of the PCR-amplified partial 16S rRNA genes from each sludge. The results obtained showed that the bacterial community was more diverse in A-O sludge than in A-A sludge. Taxonomy and beta-diversity analyses indicated that a significant shift occurred in the dominant microbial community in A-A sludge compared with the seed sludge during the whole acclimation phase, while a slight fluctuation was observed in the abundance of the major taxonomies in A-O sludge. One Dechloromonas-related OTU outside the 4 known Candidatus Accumulibacter clades was detected as the main OTU in A-A sludge at the stationary operation, while Candidatus Accumulibacter dominated in A-O sludge.
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