YANGWei,ZHENGJia-yong,LI Liang,et al.Application of Three-stage Biofilter Process in Upgrading of a WWTP[J].China Water & Wastewater,2022,38(24):87-91.
Application of Three-stage Biofilter Process in Upgrading of a WWTP
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第24期
Page:
87-91
Column:
Date of publication:
2022-12-17
- Keywords:
- intermediate nitrification and denitrification at both ends; three-stage biofilter; high-density sedimentation tank
- Abstract:
- According to the project characteristics of limited investment and no new land use, the original structures are used for transformation as much as possible. Three-stage biofilter with intermediate nitrification and denitrification at both ends process is adopted in phase Ⅰ project, the A2/O biological tank, high-density sedimentation tank and post denitrification biofilter process is adopted in phase Ⅱ project, and the effluents of both phase projects of the whole plant are treated together in the advanced treatment stage. After reconstruction, the primary biofilters and comprehensive units of intermediate nitrification and post denitrification biofilter meet the treatment capacity of 80 000 m3/d in rainy season. Besides, it can meet the treatment capacity of 60 000 m3/d for the water quality of high concentration influent in dry season. After transformation, the total unit production cost is about 2.26 yuan/m3 and the unit operating cost is about 1.80 yuan/m3. The effluent treatment effect is good, and the effluent COD, BOD5, NH3-N, SS, TN, TP are less than 30 mg/L, 6 mg/L, 1.5 mg/L, 10 mg/L, 10 mg/L, and 0.3 mg/L, respectively, which reach the Discharge Standard of Water Pollutants for Minjiang and Tuojiang River Basins in Sichuan Province (DB 51/2311-2016).
Last Update:
2022-12-17