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IC反应器处理土豆淀粉废水的启动实验研究.docx

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IC反应器处理土豆淀粉废水的启动实验研究 Abstract Potatostarchwastewaterisahighlyconcentratedorganic-richstreamwithhighBODandCODvalues,whichcanleadtoenvironmentalpollution.Hence,effectiveandeconomicaltreatmentmethodsarerequiredtopreventthispollution.Inthisstudy,theICreactorwasusedforthetreatmentofpotatostarchwastewater.TheeffectivenessoftheICreactorwasassessedthroughthestartupexperiments.TheresultsshowedthattheICreactorcaneffectivelytreatthepotatostarchwastewaterwitharemovalefficiencyofmorethan90%forCODandBOD.TheresultsshowedthattheICreactorwasanefficientandeffectivemethodforthetreatmentofpotatostarchwastewater. Introduction Potatostarchisacommonfoodingredientandisusedinawidevarietyoffoodproducts.Theproductionofpotatostarchgeneratesalargeamountofwastewaterwithhighorganiccontent,whichcanposeathreattotheenvironment.ThewastewaterfromthepotatostarchindustryischaracterisedbyahighBODandCODvaluesduetoitshighorganiccontent,makingitdifficulttotreatusingconventionalmethods. TheICreactorisapopularmethodfortreatinghigh-strengthwastewatercontainingorganicmaterial.TheICreactorcaneffectivelytreatorganic-richwastewater,especiallywithlowenergyconsumptionandlowcost.Duringtheprocessoftreatment,themicrobesinthereactorbreakdowntheorganicmaterialinwastewaterandconvertitintobiologicallystablesludge.Thus,theICreactorcanachievehighremovalefficiencyofBODandCOD. MaterialsandMethods ThestartupoftheICreactorwasperformedinalaboratory-scaleICreactorwithavolumeof5litres.Thereactorwasinitiallyinoculatedwithanaerobicsludge,whichwascollectedfromamunicipalwastewatertreatmentplant.Thepotatostarchwastewaterwascollectedfromapotatostarchprocessingindustry,locatedinthecity.ThecharacteristicsofthewastewaterwereanalysedandtheresultsarepresentedinTable1. TheICreactorwasoperatedatatemperatureof30°CandapHof7.Thehydraulicretentiontime(HRT)wassetat24hours.Theinfluentflowratewasgraduallyincreasedfrom0.5L/dayto2L/day.SamplesofthewastewaterwerecollectedatregularintervalsandwereanalysedforBOD,COD,pHandalkalinity. ResultsandDiscussion Th