几种接触氧化工艺填料处理城市污水的对比的研究.pdfVIP

几种接触氧化工艺填料处理城市 污水的对比研究 蔡笠杨基先。邱珊徐善文周璐 (哈尔滨工业大学市政环境工程学院，城市水资源与水环境国家重点实验室，黑龙江哈尔滨150090) 摘要：分别以悬浮填料和轻质聚氨酯填料作为接触氧化工艺的填料来处理生活污水，考察了四种填料对 COD、氨氮指标的去除效果及运行要求。结果表明悬浮填料由于对微小絮体的截留能力不足，其对COD的去 除率不高，造成出水COD较高：轻质填料的截留效果较好对cOD和氨氮的去除能力都优于悬浮填料，但其反 冲洗难度较大。选择处理效果较好的一种填料，研究接触氧化工艺的最佳运行参数，结果表明接触氧化工 艺蹦适宜值为“8、溶解氧的适宜值为2．3mg／L、汽水比的适宜值为11：l～13：1． 关键词： 接触氧化工艺； 生活污水； 填科；最佳运行参数 carrierand carrierwere in contactoxidationto biological Abstract：Suspendedlightweightpolyurethane applied treat kindsofcarrierswereresearchedontheremoval ofCODandammonia domestic sewage．Four efficiency also showedthatduetothe thesame Were researched．Results time，their parameters poor nitrogen，At operating to carderwasnot at causedthe retain wasterwater,which ability suspendedtic．suspended goodtreating tiny CODofeffluentWas carderhadbetter itsremoval high．Lightweightpolyurethane retainingability,and efficiency of backflushof ofCODandammoniawere thanthat nitrogenhigher suspendedcarrier．However,thelightweight chosento carrierWasdifficulLIn bestsuitablecarrierWas researchbest polyurethane addition，the operating in contactoxidation．Theresultsindicatedfithatthemost value PH，dissolved paraanetersbiological appropriate oxygenandgas·waterratioWere6-8，2-3rag／L,a