移动床生物膜法处理垃圾渗滤液COD降解动力学

第58卷第3期2007年3月化工学报JournalofChemicalIndustryandEngineering(China)Vo1．58No．3March2007移动床生物膜法处理垃圾渗滤液COD降解动力学陈胜，孙德智，陈桂霞，ChungJongshikh(哈尔滨工业大学市政环境工程学院，黑龙江哈尔滨150090；浦项工科大学化学工程系，韩国浦项790—784)摘要：采用移动床生物膜反应器间歇处理城市垃圾渗滤液，并建立了其COD降解的动力学模型。试验结果表明，模型能够很好地描述渗滤液COD的好氧降解过程，其中动力学参数Kz可用来指示基质的降解速率，s可用作渗滤液可生化性和可降解程度的评价指标。在不同底物浓度下模拟出的参数Kz和s均与底物浓度S0呈线性关系。在不同填料填充比下的拟合结果表明动力学参数Kz与生物量浓度无关。两级MBBR串联运行能够有效处理该垃圾渗滤液，当总HRT为4d，平均COD去除率达89．24％，其出水COD平均为452．10mg·L一，与模型得出该进水浓度下含有的惰性COD相近，直接证明了模型对评价该渗滤液可生化性具有较高的可靠性。关键词：动力学模型；垃圾渗滤液；生物膜；移动床；可生化性中图分类号：X703文献标识码：A文章编号：0438—1157(2007)03—0733—06KineticsofCODdegradationinlandfillleachatetreatmentusingmoving-bedbioreactorCHENSheng'。SUNDezhi-CHENGuixia-ChungJongshik·(SchoolofMunicipal&EnvironmentalEngineering，HarbinInstituteofTechnology，Harbin150090，Heilongjiang，China：DepartmentofChemicalEngineering，PohangUniversityofScienceandTechnology，Pohang790—784，Korea)Abstract：BatchtestswerecarriedouttoinvestigatetheC0Ddegradationoflandfillleachatebyusingamoving-bedbioreactor(MBBR)。andamodifiedbio—kineticmodelwasestablishedtodescribethebiologicalreaction．Theexperimentalresultsshowedthatthemodelcoulddescribethebiodegradationofleachate，andthekineticparameterK2couldbeusedasindicatorofdegradationrateandScouldbeusedtoestimatethebiodegradabnityofleachate．ThesimulationsunderdifferentinitialleachateconcentrationsfoundthatK2andSwerelineartotheinitialleachateconcentrationS0．Thedataofdifferentbio—carriervolumesalsoperfectlyconformedtothemodelandfurtherprovedthatthekineticparametersinthemodelwereindependentofthebiomass．ThecontinuousoperationoftwoMBBRinseriescouldeffectivelyremovethelandfillleachate，whenthetotalhydraulicretentiontime(HRT)was4d，theaverageCODremovalefficiencywas89．24andtheeffluentCODwasabout452．10mg·L_。，whichwassimilartothepredictedvaluebythemodelunderthesameinitialconcentration．TheperformanceoftwoMBBRinseriesgaveadirectproofofthereliabilityofthemodelthatwasusedtoestimatethebiodegradabilityofleachate．Keywords：kineticmodel；landfillleachate；biofilm；moving—bedbioreactor；bi