JIPeng-zhou,YUANJin,YANGZhi-hong,et al.Whole Process Testing and Application of Pre-anoxic A2/O and AO Process[J].China Water & Wastewater,2023,39(18):112-119.
前置预缺氧A2/O+AO工艺全流程测试与应用研究
- Title:
- Whole Process Testing and Application of Pre-anoxic A2/O and AO Process
- Keywords:
- wastewater treatment plant; process optimization; pre-anoxic A2/O and AO process; whole process test; nitrogen and phosphorus removal; energy saving and consumption reducing
- 摘要:
- 以山西省某城镇污水处理厂前置预缺氧A2/O+AO工艺为研究对象，通过全流程测试评估工艺现状，指导工艺调控，优化脱氮除磷效果，同时实现节能降耗，降低运行成本。基于全流程测试结果，采取调整好氧区曝气模式、增设消氧区、协同调整外回流比及进水配比、降低污泥浓度、调整碳源投加点位等优化措施后，出水TN由13.21 mg/L降至8.74 mg/L，TN去除率由71%提高至79%，对PO43--P的去除率由82%提高至98%，该厂生物脱氮除磷效能得到较大提升，同时每月可节省碳源费用14万元，经济效益明显。
- Abstract:
- The A2/O and AO process of a municipal wastewater treatment plant (WWTP) in Shanxi Province is studied to evaluate the current status of the process, guide the process regulation and control, optimize the effect of nitrogen and phosphorus removal, save energy and reduce consumption, reduce operating costs at the same time through whole process testing. Based on the results of the whole process test, the effluent TN was reduced from 13.21 mg/L to 8.74 mg/L, the TN removal rate was increased from 71% to 79%, and the PO43--P removal rate was increased from 82% to 98% after taking the optimization measures such as adjusting the aeration mode of aerobic zone, adding an oxygen elimination zone, adjusting the ratio of external return flow and influent, reducing the sludge concentration, and adjusting the carbon source dosage point. The efficiency of biological nitrogen and phosphorus removal in the WWTP was greatly improved, while the monthly cost of carbon source could be saved by 140 000 yuan, which has an obvious economic benefit.
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