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2.5×10^(4)m^(3)/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、NH_(3)-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、BOD_5≤6 mg/L、SS≤5 mg/L、NH_3-N≤1.5 mg/L、TN≤10 mg/L、TP≤0.3 mg/L、色度≤30倍)。工程总投资为9952.23万元,总处理成本为3.37元/m^(3)。
The treatment capacity of a wastewater treatment plant in an industrial park in Wuxi is 2.5×10^(4)m^(3)/d,in which the effluent water quality is required to meet quasi-Ⅳstandard 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 NH_(3)-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-Ⅳlimitations of Environmental Quality Standards for Surface Water(GB 3838-2002),namely COD≤30 mg/L,BOD5≤6 mg/L,SS≤5 mg/L,NH_(3)-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 99.5223 million yuan and the total treatment cost was 3.37 yuan/m^(3).
作者
张万里
冯仕训
程明涛
ZHANG Wan-li;FENG Shi-xun;CHENG Ming-tao(Wuxi Municipal Design and Research Institute Co.Ltd.,Wuxi 214072,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2021年第12期83-87,共5页
China Water & Wastewater
关键词
工业园区污水处理厂
提标改造
准Ⅳ类地表水标准
wastewater treatment plant in an industrial park
upgrading and reconstruction
quasi-Ⅳstandard of surface water
