接续A_2O的气浮过滤污水深度处理工艺研究_杨墨

文章编号:1007-2284(2018)06-0088-04接续A2O的气浮过滤污水深度处理工艺研究杨墨1，田中凯2，邓涛3，杜敬2，刘毛3，王旭峰3，车晖2(1．中国市政工程中南设计研究总院有限公司，武汉430010;2．武汉市城市排水发展有限公司，武汉430010;3．武汉大学土木建筑工程学院，武汉430072)摘要:探究混凝－溶气气浮－过滤工艺在污水深度处理方面的可行性。以武汉市某污水处理厂A2O工艺二沉池出水为原水，进行了混凝－溶气气浮－过滤深度处理工艺中试研究。试验完成了分流比、加药量、表面负荷3个主要影响因素的三因素三水平正交实验，以COD、总磷、浊度去除率为考察指标，结果表明:加药量对COD、总磷、浊度去除效果影响均最为显著，推荐工艺最佳运行参数为表面负荷11．11m3/(m2·h)，加药量10mg/L，分流比12%，且在此运行条件下，单位水处理电耗与药耗总共为0．039元/m3;同时在固定表面负荷10m3/(m2·h)条件下进行了连续流实验，结果表明:在一定水质波动条件下，该工艺连续运行可靠、处理效果稳定，出水COD浓度稳定低于15mg/L、出水总磷浓度稳定低于0．1mg/L，出水浊度低于0．5NTU，有一定工程应用前景。关键词:混凝;气浮;过滤;污水深度处理中图分类号:TV211．1+2;TU991文献标识码:AStudyofDissolvedAirFlotation－FiltrationonA2OProcessforAdvancedWastewaterTreatmentYANGMo1，TIANZhong-kai2，DENGTao3，DUJing2，LIUMao3，WANGXu-feng3，CHEHui2(1．CentralandSouthernChinaMunicipalEngineeringDesignandＲesearchInstituteCo．Ltd．，Wuhan430010，China;2．WuhanUrbanDrainageDevelopmentCo．Ltd．，Wuhan430010，China;3．DepartmentofMunicipalEngineering，SchoolofCivilEngineering，WuhanUniversity，Wuhan430072，China)Abstract:Toexplorethefeasibilityofthecoagulation－dissolvedairflotation(DAF)－filtrationprocessintheadvancedwastewatertreatment，apilotstudyonthecoagulation－dissolvedairflotation－filtrationadvancedtreatmentprocesswascarriedoutinasewagetreatmentplantofWuhanwiththeeffluentfromthesecondarysedimentationtankofA2Oprocessasrawwater．Theexperimentcompletedthethreefactorsandthreelevelsorthogonalexperimentofsplitratio、dosageofcoagulant、surfaceloadthreefactors，COD、TP、turbidityremovalrateastheevaluationindex，theresultsshowedthatthedosagehadthemostsignificanteffectontheremovalofCOD，totalphosphorusandturbidity．Theoptimumoperatingparametersoftherecommendedprocessweresurfaceloadof11．11m3/(m2·h)，dosageof10mg/Landsplitratioof12%．Underthisoperatingconditions，theunitwatertreatmentpowerconsumptionanddrugconsumptionforatotalof0．039yuan/m3;Atthesametime，thecontinuousflowtestwascarriedoutundertheconditionoffixedsurfaceloadof10m3/(m2·h)．Theresultsshowedthatunderacertainwaterqualityfluctuationcondition，theprocesswasreliable，thetreatmenteffect