RU Chun,ZHANG Shuang,LU Hui,et al.Pollutants Removal Performance and Operation Regulation of Urban Wastewater Treatment Plant under Low Temperature Condition[J].China Water & Wastewater,2021,37(9 9):1-6.
Pollutants Removal Performance and Operation Regulation of Urban Wastewater Treatment Plant under Low Temperature Condition
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
9 9
Page:
1-6
Column:
Date of publication:
2021-05-01
- Keywords:
- MBBR; modified Bardenpho process; magnetic loading precipitation; low temperature; removal of nitrogen and phosphorus
- Abstract:
- Design capacity of a newly-built wastewater treatment plant (WWTP) in Northeast China is 3×104 m3/d,and the combined process is modified Bardenpho-MBBR+ magnetic loading precipitation. When the temperature was as low as 8.7 ℃, NH3-N, SS, TN and TP in the effluent were (0.23±0.13) mg/L, (0.69±0.85) mg/L, (7.99±1.73) mg/L and (0.15±0.05) mg/L, respectively, and the effluent quality was stable and superior to the limitations of the discharge standard. The MBBR process enhanced the nitrification performance of the system at low temperature, and the magnetic loading precipitation process strengthened the ability of the advanced treatment system to deal with SS shock.By adjusting carbon source dosing points of the modified Bardenpho process and adopting multi-point feeding and multi-point reflux of the system, efficient usage of the external carbon source and high-efficiency denitrification and phosphorus removal of the biochemical system were realized. The appearance of simultaneous nitrification and denitrification (SND) in the aerobic MBBR zone helped to save the dosage of external carbon source.
Last Update:
2021-05-01