LIU Shi-hu,WANG Jia-le,ZHOU Jian.Effect of C/N Ratio on High-standard Nitrogen and Phosphorus Removal Efficiency of SBR with Short-time Aeration[J].China Water & Wastewater,2020,36(15 15):13-17.
Effect of C/N Ratio on High-standard Nitrogen and Phosphorus Removal Efficiency of SBR with Short-time Aeration
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
15 15
Page:
13-17
Column:
Date of publication:
2020-08-01
- Keywords:
- sewage; SBR; short-time aeration; C/N ratio; high-standard nitrogen and phosphorus removal
- Abstract:
- A series of problems existed in sewage treatment such as low nitrogen and phosphorus removal efficiency and shortness of carbon source. A high-standard nitrogen and phosphorus removal technology based on SBR with shorttime aeration was proposed for sewage treatment, and the effect of influent C/N ratio on nitrogen and phosphorus removal efficiency of the SBR system was investigated. Results showed that C/N ratio had a significant effect on the nitrogen and phosphorus removal efficiency of the SBR with shorttime aeration. When the temperature was 25 ℃, the SRT was 40 days and the influent C/N ratios were 4, 5, 6 and 7, the removal rates of NH4+-N were 83.3%, 99.3%, 99.4% and 99.5%, respectively, the removal rates of TN were 58.8%, 82.6%, 88.1% and 93.8%, respectively, and the removal rates of TP were 14.6%, 54.5%, 76.6% and 97.5%, respectively. When the influent C/N ratio was 7, the average concentrations of COD, NH4+-N, TN and TP in the effluent were 18 mg/L, 0.20 mg/L, 2.46 mg/L and 0.13 mg/L, respectively. The concentrations of COD, NH4+-N and TP in the effluent could meet the level Ⅳ standard of surface water, and the TN concentration in the effluent was close to the level Ⅴ standard of surface water.。
Last Update:
2020-08-01