JIANG Ming,SHI Fang?yong,GU Xue?feng,et al.Design of a Wastewater Treatment Plant Upgrading Project in an Industry Park to Meet Quasi?Ⅳ Surface Water Standard[J].China Water & Wastewater,2022,38(2):59-63.
工业园区污水厂准Ⅳ类水质提标改造工程设计
- Title:
- Design of a Wastewater Treatment Plant Upgrading Project in an Industry Park to Meet Quasi?Ⅳ Surface Water Standard
- Keywords:
- industrial park; upgrading; quasi?Ⅳ standard
- 摘要:
- 盱眙县某工业园区污水处理厂提标改造工程建设规模为2×104 m3/d，污水处理厂出水水质除COD≤30 mg/L、TP≤0.4 mg/L外，其余指标执行《城镇污水处理厂污染物排放标准》（GB 18918—2002）的一级A标准。原工艺为水解酸化+DN/CN组合滤池+D型滤池+消毒池。提标改造工程针对进水以工业废水为主，水质波动大、浓度高的特点，将主体工艺改造为水解酸化+“七段式”生化法+深度处理+紫外消毒。污水处理厂尾水经过人工湿地后，出水达到地表水准Ⅳ类标准。实际运行数据表明，污水处理厂调试运行期出水基本能够达到设计标准。该工艺充分利用生化单元解决脱氮问题，且通过深度处理保证难降解有机物的去除。
- Abstract:
- The design scale of a wastewater treatment plant (WWTP) upgrading project in Xuyi is 2×104 m3/d. Except COD and TP in the effluent which are required to be no more than 30 mg/L and 0.4 mg/L, the effluent quality of the WWTP shall comply with the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The original treatment process was hydrolytic acidification, DN/CN combined filter, D?type filter and disinfection tank. As the influent (mainly industrial wastewater) is characterized by high concentration and large fluctuation of the water quality, the main process of the upgrading project was transformed into hydrolytic acidification, seven?stage biochemical process, advanced treatment and ultraviolet disinfection. After the tail water of the WWTP was purified by the constructed wetland, the effluent quality reached the quasi?Ⅳ surface water standard. The trial operation data showed that the effluent quality of the WWTP generally reached the design standard. The process makes full use of the biochemical units to solve the problem of nitrogen removal and ensures the removal of refractory organic pollutants through advanced treatment.
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