AA/RPIR+磁混凝工艺在城市污水处理厂扩能改造中的应用  

Application of AA/RPIR and Magnetic Coagulation Process in Expansion and Reconstruction of Municipal WWTP

作　　者：王磊 俞健 张敏君 WANG Lei;YU Jian;ZHANG Minjun(Kunshan Jiangong Engineering Environment Investment Co.,Ltd.,Kunshan 215300,China;Kunshan Jianbang Engineering Environment Investment Co.,Ltd.,Kunshan 215300,China)

机构地区：[1]昆山建工环境投资有限公司,江苏昆山215300 [2]昆山建邦环境投资有限公司,江苏昆山215300

出　　处：《净水技术》2023年第12期154-161,共8页Water Purification Technology

摘　　要：昆山某城市污水处理厂处理水量长期处于超负荷状态,同时又面临建设面积紧缺及出水标准升级的问题,研究后决定采用AA/快速生化污水处理(RPIR)+磁混凝工艺在原厂址基础上进行扩能改造。重点对AA/RPIR+磁混凝工艺的实际运行效果及经济运行效益展开分析。结果表明:该工艺对污染物的去除效果极好,COD_(Cr)去除率高达94.2%;出水浓度均优于设计标准,其中COD_(Cr)、BOD5、SS、氨氮、TN、TP均值分别为13.38、2.31、6.31、0.313、7.86、0.082 mg/L;沿程分析结果显示AA/RPIR与磁混凝工艺结合取得了良好脱氮除磷效果,氨氮、TN、TP去除率分别达到了99.0%、77.5%、97.9%,75.0%~90.2%的磷均在生化段去除且具备良好的工艺稳定性;经济效益分析结果显示本项目投资运行成本低,正式运营后RPIR池吨水电耗由0.511 kW·h下降到0.215 kW·h,磁混凝PAC+PAM吨水耗药成本由0.026元下降到0.0046元,节能降耗效果较好。The amount of water treated by a municipal wastewater treatment plant(WWTP)in Kunshan is in the state of exceeding load for a long time,facing the problem of lack of construction land and upgrading of water standard.The AA/RPIR+magnetic coagulation process is determined to be used for capacity expansion at the original site.This study focuses on the analysis of AA/RPIR+magnetic coagulation process practical operation effect and economic operation benefits.The results show that the process has excellent removal effect on pollutants,and the COD_(Cr)removal rate is as high as 94.2%.The effluent concentration is better than the standard.The mean values of COD_(Cr),BOD5,SS,ammonia nitrogen,TN and TP are 13.38,2.31,6.31,0.313,7.86,0.082 mg/L,respectively.The results of analysis along the process show that AA/RPIR combined with magnetic coagulation process achieved good nitrogen and phosphorus removal effect,and the removal rates of ammonia nitrogen,TN and TP reach 99.0%,77.5%and 97.9%,respectively.75.0%~90.2%phosphorus is removed in the biochemical stage and maintained good process stability.The results of economic benefit analysis show that the project has a low cost of investment and operation.After the formal operation,the water and electricity consumption per ton of RPIR pool decreases from 0.511 kW·h to 0.215 kW·h,and the water consumption cost per ton of magnetic coagulation decreases from 0.026 yuan to 0.0046 yuan,which has a good effect of energy saving and consumption reduction.

关 键 词：快速生化污水处理技术(RPIR) 磁混凝 污水厂 改造 脱氮除磷 节能降耗 

分 类 号：TU992[建筑科学—市政工程]