ZHANG Wan-li,FENG Shi-xun,CHENG Ming-tao.Design of a Wastewater Treatment Plant Upgraded to Higher Discharge Standard in an Industrial Park in Taihu Area[J].China Water & Wastewater,2021,37(12):83-87.
太湖流域某工业园区污水厂高排放标准提标改造工程设计
- Title:
- Design of a Wastewater Treatment Plant Upgraded to Higher Discharge Standard in an Industrial Park in Taihu Area
- Keywords:
- wastewater treatment plant in an industrial park; upgrading and reconstruction; quasi-Ⅳ standard of surface water
- 摘要:
- 无锡某工业园区污水处理厂准Ⅳ类水提标改造工程设计规模为2.5×104 m3/d，污水处理厂进水以印染废水为主，其水质具有B/C值低、溶解性难降解COD高、色度较高、NH3-N和TN较低的特点，针对于此，提标改造工程采用将工业废水与生活污水分质预处理、将Carrousel氧化沟改为A/O工艺、深度处理采用臭氧催化氧化+超滤工艺等措施。改造后的工艺流程为调节池+两级水解酸化池+初沉池+A/O池+二沉池+高效沉淀池+滤布滤池+臭氧催化氧化系统+超滤，出水水质能稳定达到《地表水环境质量标准》（GB 3838—2002）准Ⅳ类水标准（COD≤30 mg/L、BOD5≤6 mg/L、SS≤5 mg/L、NH3-N≤1.5 mg/L、TN≤10 mg/L、TP≤0.3 mg/L、色度≤30倍）。工程总投资为9 952.23万元，总处理成本为3.37元/m3。
- Abstract:
- The treatment capacity of a wastewater treatment plant in an industrial park in Wuxi is 2.5×104 m3/d, in which the effluent water quality is required to meet quasi-Ⅳ standard of surface water. Influent of the wastewater treatment plant is mainly printing and dyeing wastewater, which has the characteristics of low B/C ratio, high dissolve and refractory COD, high chromaticity and low NH3-N and TN. In response to these problems, separate pretreatment of industrial wastewater and domestic wastewater, transformation of Carrousel oxidation ditch by A/O process and addition of ozone catalyzed oxidation and ultrafiltration in advanced treatment were carried out in the upgrading project. The process after upgrading and reconstruction was as follows: regulating pond, two stage hydrolysis acidification tanks, primary sedimentation tank, A/O tank, secondary sedimentation tank, high efficiency sedimentation tank, cloth media filter, catalytic ozonation system and ultrafiltration. The effluent water quality could reach quasi-Ⅳ limitations of Environmental Quality Standards for Surface Water (GB 3838-2002), namely COD≤30 mg/L, BOD5≤6 mg/L, SS≤5 mg/L, NH3-N≤1.5 mg/L, TN≤10 mg/L, TP≤0.3 mg/L and chroma≤30 times. The total investment of the project was 99.522 3 million yuan and the total treatment cost was 3.37 yuan/m3.
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