XU Xiao-ming,LIU Yu xin,YAN Ping,et al.A Design Case of Upgrading and Expansion Project to Meet the Quasi-Ⅳ Class Standard in a WWTP with Industrial Wastewater as Its Major Influent[J].China Water & Wastewater,2020,36(18):60-65.
以工业废水为主的污水厂准Ⅳ类水质提标扩建工程设计
- Title:
- A Design Case of Upgrading and Expansion Project to Meet the Quasi-Ⅳ Class Standard in a WWTP with Industrial Wastewater as Its Major Influent
- Keywords:
- printing and dyeing wastewater; upgrading and reconstruction project; two-stage A/O process; Fenton; advanced treatment
- 摘要:
- 浙江某污水厂提标及扩建工程总规模为4×104 m3/d，其中提标2×104 m3/d、扩建2×104 m3/d。污水厂原采用厌氧水解+MSBR+絮凝沉淀池+V型滤池处理工艺，出水执行一级A排放标准，提标及扩建工程要求出水水质达到浙江省地方标准《城镇污水处理厂主要水污染物排放标准》（DB 33/2169—2018）中现有污水厂标准。针对进水中工业废水占比为60%、污染物浓度波动大、含难降解有机物等特点，扩建工程采用调节池+水解酸化池+二级A/O生化池+芬顿+高效沉淀池+V型滤池工艺。提标工程将原MSBR池改造为A/A/O池，并增加了芬顿深度处理工艺，改造了絮凝沉淀池，实际运行效果良好，出水水质完全达到设计目标，直接运行成本为1.42 元/m3。
- Abstract:
- The total scale of upgrading and expansion project in a wastewater plant in Zhejiang is 4×104 m3/d, including upgrading project of 2×104 m3/d and expansion project of 2×104 m3/d. The wastewater treatment plant originally adopted anaerobic hydrolysis+MSBR+flocculation sedimentation tank+V-type filter treatment process, the effluent carries out the first class A discharge standard. The upgrading and expansion project requires the effluent quality to meet the existing wastewater treatment plant standard in Zhejiang Province local standard Discharge Standard of Major Water Pollutants for Municipal Wastewater Treatment Plant (DB 33/2169-2018). According to the characteristics of 60% industrial wastewater in influent, large fluctuation of pollutant concentration and refractory organic matter， the process of regulating tank+hydrolysis acidification tank+two-stage A/O+Fenton+high efficiency sedimentation tank+V-type filter was adopted in the expansion project. The Fenton process was added, and MSBR was transformed into A/A/O tank, flocculation sedimentation tank was reformed in upgrading project. The actual operation effect was good, and the effluent quality reached the design goal completely, and the direct operating cost was 1.42 yuan/m3.
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