期刊
BIORESOURCE TECHNOLOGY
卷 216, 期 -, 页码 1083-1087出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.05.061
关键词
Optimal hydraulic retention time; Biological phosphorus removal; Granules; Continuous-flow reactor; High-throughput pyrosequencing
资金
- Trans-Century Training Programme Foundation for the Talents by the State Education Commission [NCET-10-0008]
- water project of National Science and Technology Major Project Grant [2012ZX07202-005]
In continuous-flow reactor (CFR), suboptimal hydraulic retention time (HRT) can affect the substrate loading, anaerobic time and aerobic time and further affect the performance and characteristics of granules, thus different HRTs (7.5, 6.0, 4.5 and 5.2 h) were tested to improve the phosphorus (P) and carbon (COD) removal of the continuous-flow system with granules in this study. When HRT was below 6.0 h, the COD removal efficiency in anaerobic zone and the P removal efficiency in aerobic zone reduced obviously, and the settling ability of EBPR granules deteriorated. The residual COD in anaerobic zone resulted in the proliferation of filamentous bacteria on the granules surface. Pyrosequencing analysis revealed that Proteobacteria was the dominant phylum in this system. The dominant class transformed from Betaproteobacteria to Gammaproteobacteria when HRT was reduced from 6.0 h to 4.5 h. (C) 2016 Elsevier Ltd. All rights reserved.
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