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Effect of Cod/n Ratio on Performance of a Sequencing Batch Reactor Treating Saline Wastewater
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gao, Mengchun Wang, Sen Wang, Zichao She, Zonglian Xin, Yanjun Ma, Dong Chang, Qingbo Li, Zhiwei Zhang, Jian |
| Copyright Year | 2018 |
| Abstract | The performance and microbial community of an anoxic-aerobic sequencing batch reactor (SBR) treating saline wastewater were investigated at different influent COD/N ratios. The average COD removal efficiencies at steady states were 87.46%, 73.75%, 64.87% and 88.34% at the COD/N ratios of 20, 10, 6 and 30, respectively. The average NH4+-N removal efficiencies were 79.74%, 74.34%, 64.55% and 89.29% at the COD/N ratios of 20, 10, 6 and 30, respectively. No obvious accumulation of NO2--N and NO3--N in the effluent was found during the whole operational period. The specific ammonium oxidation rate (SAOR), specific nitrite oxidation rate (SNOR) and specific oxygen uptake rate (SOUR) increased with the decrease of COD/N ratio from 20 to 6, whereas the specific nitrate reduction rate (SNRR) decreased. The diversity indices of microbial community in the SBR were 2.19, 2.10, 2.17 and 2.07 at the COD/N ratio of 20, 10, 6 and 30, respectively. Some bacteria were present at all the COD/N ratios, such as Nitrosomonas sp., Ohtaekwangia kribbensis and Propionicimonas paludicola, suggesting these bacteria could adapt to the shock of influent COD/N ratio. |
| Starting Page | 1161 |
| Ending Page | 1168 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.30638/eemj.2018.115 |
| Volume Number | 17 |
| Alternate Webpage(s) | http://www.eemj.icpm.tuiasi.ro/pdfs/vol17/no5/15_280_Wang_14.pdf |
| Alternate Webpage(s) | https://doi.org/10.30638/eemj.2018.115 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
