垃圾渗滤液深度处理的混凝-UV-O3组合工艺试验

收稿日期:２０１９-０１-１５.基金项目:江西省科技厅重大科技攻关课题(２０１４３ACG７０００１５);江西省教育厅科技落地项目(KJLD１２０１７).作者简介:郭晓京(１９９２－),男,硕士生.∗通信作者:胡兆吉(１９６２－),男,博士,教授.E-mail:zhjhu２００５＠１６３．com.文章编号:１００６-０４６４(２０１９)０２-０１５１-０６垃圾渗滤液深度处理的混凝-UV-O３组合工艺试验郭晓京,胡兆吉∗,刘康,刘泉,金琪,刘思琪(南昌大学资源环境与化工学院,江西南昌３３００３１)摘要:老龄的垃圾渗滤液经过生化处理之后仍然不能达标排放,需要进行深度处理.本文采用混凝/UV/O３组合工艺对经氧化塘出水的垃圾渗滤液进行了深度处理的试验研究,探索了较优的组合处理工艺条件.结果表明:在混凝反应阶段,当pH值为５、PFS投加量为１２００mL(１００g/１０００mL)、PAM投加量为１０００mL(１g/１０００mL),COD去除率可达６０．２％;在光化学反应阶段,当反应时间为６０min、pH值为９、紫外光照强度为３．８W•L－１、臭氧通气量为８０L•h－１,COD去除率可达７９．１％.该组合工艺对水样的COD综合去除率为９１．７％,最终出水COD值由１５６０mg•L－１降低至１３０mg•L－１,出水可接近GB１６８８９－２００８排放标准.同时,研究结果还表明了混凝与光化学处理工艺组合应用的必要性,与单纯的UV/O３光化学处理工艺相比,混凝/UV/O３组合处理工艺对垃圾渗滤液COD的去除率提升了２３．５％.关键词:垃圾渗滤液;深度处理;混凝处理;UV/O３光化学处理中图分类号:X７０３．１文献标志码:AExperimentalstudyonthecoagulation/UV/O３processusedinadvancedtreatmentoflandfillleachateGUOXiaojing,HUZhaoji,LIUKang,LIUQuan,JINQi,LIUSiqi(SchoolofEnvironmentalandChemicalEngineering,Nanchang３３００３１,China)Abstract:Theagedlandfillleachateisstillunabletoreachthestandardafterbiochemicaltreatmentandneedstobetreatedindepth．Inthispaper,thecoagulation/UV/O３combinationprocesswasusedtoinvesti-gatetheadvancedtreatmentoflandfillleachatetreatedbyoxidationpond．Theresultsshowedthattheopti-malreactionconditionswere:theconditionofthecoagulationreactionstagewaspH＝５,thedosageofPFSwas１２００mL(１００g/１０００mL),andthedosageofPAMwas１０００mL(１g/１０００mL),andCODremovalrateis６０．２％;Thephotochemicalreactionstageconditionsare６０min,pH＝９,ultravioletlightintensityis３．８W•L－１,andozoneventilationis８０L•h－１,andCODremovalrateis７９．１％．Overall,thecombinedprocesshasCODremovalrateof９１．７％forwastewater．ThefinaleffluentCODvaluewasreducedto１３０mg•L－１．Atthesametime,thestudyemphasizestheimportanceofthecombinedapplicationofcoagula-tionandphotochemicalreactionunits．TheCODremovalrateofthecoagulation/UV/O３combinationprocessis２３．５％higherthanthatofthecoagulation/UV/O３process．Keywords:landfillleachate;advancedprocessing;coagulation;UV-O３photochemicalreaction垃圾渗滤液是一种成分十分复杂的高浓度有机废水,它具有比生活污水更高的有机物含量、更高的色度以及难以控制的营养比例[１],处理难度高.国内对其常采用的处理方法