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):1-6.
低温条件下污水处理厂的除污效果及运行调控分析
- Title:
- Pollutants Removal Performance and Operation Regulation of Urban Wastewater Treatment Plant under Low Temperature Condition
- 关键词:
- MBBR; 改良Bardenpho工艺; 磁加载沉淀; 低温; 脱氮除磷
- Keywords:
- MBBR; modified Bardenpho process; magnetic loading precipitation; low temperature; removal of nitrogen and phosphorus
- 摘要:
- 东北某新建污水处理厂设计水量为3×104 m3/d，采用“改良Bardenpho-MBBR+磁加载沉淀”处理工艺。实际运行效果显示，在8.7 ℃的低温条件下，出水NH3-N、SS、TN和TP分别为（0.23±0.13）、（0.69±0.85）、（7.99±1.73）和（0.15±0.05） mg/L，出水水质稳定且优于排放标准。MBBR工艺保障了低温下系统的硝化效果，磁加载沉淀工艺强化了深度处理系统应对SS冲击的能力。通过调控改良Bardenpho工艺的碳源投加点以及系统多点进水、多点回流，实现了外投碳源的高效利用以及生化系统的高效脱氮除磷效果，好氧MBBR区同步硝化反硝化（SND）的出现助力了外投碳源的节约。
- 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.
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