氧化_微絮凝_高速过滤应用于再生水生产的研究_贾仁勇

氧化-微絮凝-高速过滤应用于再生水生产的研究＊贾仁勇1,2孙力平2韦立3李秀敏4齐兆涛2衣雪松2(1.同济大学污染控制与资源化研究国家重点实验室,上海200092;2.天津城市建设学院环境与市政工程系,天津300384;3.天津市园林规划设计院,天津300211;4.天津中水有限责任公司,天津300061)摘要:以中国北方缺水地区污水再生利用为目标,采用常规滤料双层过滤探讨高速微絮凝、氧化过滤再生水处理技术,试验通过不同的滤料级配、滤层厚度的对比试验;采用3种混凝剂和3种助凝剂做筛选试验,发现采用1#混凝剂,HFO助凝剂做絮凝氧化剂效果较理想,得出高速微絮凝氧化过滤工艺处理城市污水厂二级出水的工艺是可行的。试验装置的滤池单位面积周期产水量为50m3(m2·h),最佳工艺条件下出水浊度去除率为92.21%,平均浊度为0.889NTU;COD去除率为55.58%,平均为22.33mgL;PO3-4-P去除率为84%,平均为0.135mgL;色度去除率为80.7%,平均为1.45度,完全符合GBT18920-2002《城市污水再生利用城市杂用水质》要求。关键词:氧化;微絮凝;高速过滤;再生水TREATMENTOFTHESECONDARYEFFLUENTOFMUNICIPALWASTEWATERBYOXIDATION-MICROFLOCCULATION-HIGHSPEEDFILTRATIONPROCESSJiaRenyong1,2SunLiping2WeiLi3LiXiumin4QiZhaotao2YiXuesong2(1.StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China;2.DepartmentofEnvironmentalandMunicipalEngineering,TianjinInstituteofUrbanConstruction,Tianjin300384,China;3.TianjinInstituteofLandscapePlanningDesign,Tianjin300211,China;4.TianjinReclaimedWaterCo.,Ltd,Tianjin300061,China)Abstract:SewagerecycleisoneofthemosteffectivemethodsthatcanbeadoptedtosettlesuchproblemsastheshortageofwaterandthewaterpollutioninNorthernChina.Inordertofindahigh-efficiencyandlow-costsewagerecycleprocess,thesecondaryeffluentofmunicipalwastewateristreatedbyusingthedouble-layerfilterofnormalmediumandtheprocessofdown-flow-high-speedfiltrationunderthesituationofflocculationandoxidation.Throughcomparing,theinfluenceofthefilterabilitycausedbychangingthefilterbedandpretreatmentwaysarestudied.Theoxidation-microflocculation-highspeedfiltrationprocessisprovedtobepracticable,andoxidantHFOandcoagulant1#giveagoodperformanceintheexperiments.Wateryieldfromthefilterbedperunitareaineachcycleis50m3(m2·h),theaverageturbidityoftheeffluentis0.889NTU,andtheremovalrateis92.21%;CODremovalrateis55.58%,withanaverageof22.33mgL;PO3-4-Premovalrateis84%,theaverageis0.135mgL;chromaremovalrateis80.7%,withanaverageof1.45,thewaterqualityofthefinaleffluentmeetsthewaterqualitystandardforurbanmiscellaneouswaterconsumptionofGBT18920-2002.K