LI Wei-guang,LI Dong-hui,YAO Jie,et al.Effect of Sludge Retention Time on Nitrogen and Phosphorus Removal Efficiency of Bi-bio-selector for Nitrogen and Phosphorus Removal Process[J].China Water & Wastewater,2020,36(17 17):13-17.
Effect of Sludge Retention Time on Nitrogen and Phosphorus Removal Efficiency of Bi-bio-selector for Nitrogen and Phosphorus Removal Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
17 17
Page:
13-17
Column:
Date of publication:
2020-09-01
- Keywords:
- bi-bio-selector for nitrogen and phosphorus removal (BBSNP)process; sludge retention time; anoxic phosphorus uptake rate; denitrifying phosphorus accumulating bacteria
- Abstract:
- Effect of sludge retention time (SRT) on the nitrogen and phosphorus removal efficiency of the bi-bio-selector for nitrogen and phosphorus removal (BBSNP)process was explored based on full-scale test device in a municipal sewage treatment plant in Shanghai. The results showed that SRT had a great influence on nitrogen and phosphorus removal efficiency of the BBSNP process. After increasing the SRT from 7 days to 15 days, COD removal efficiency in the anaerobic tank increased from 62.37% to 80.32%, the anoxic phosphorus uptake rate increased from the average of 33.9% to 77.9%, the anaerobic phosphorus release time increased from 3.11 times to 4.13 times, and the total nitrogen removal efficiency increased from 68.27% to 74.05%. This indicated that a large number of denitrifying phosphorus accumulating bacteria were enriched in the system, which showed a good removal effect of nitrogen and phosphorus and improved the effluent quality.
Last Update:
2020-09-01