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1摘要本次设计的内容是糖厂废水的处理，主要的处理对象主要包括车间生产废水和部分制糖工艺冷却循环水。设计每天处理水量为14400m3/d，进水水质为COD：800mg/L、BOD：400mg/L，SS：100mg/L，要求处理后的污水达到COD≤100mg/L，BOD≤20mg/L，SS≤70mg/L，符合污水综合排放标准（GB8978-1996）中的一级标准。依据该糖厂的水质水量特点及糖厂废水处理技术现状、排放标准，本处理工程的主体工艺确定氧化沟工艺。工艺流程为：从沉淀池中排出的污泥经过排泥管收集到糖厂内的锅炉沉灰池。采用该工艺总投资为746.39万元，废水处理成本为0.354元。采用氧化沟工艺可有效地保护周边水环境，而且该工艺还有易于管理等优点。关键词：糖厂废水；氧化沟；污水处理废水格栅调节池出水沉淀池氧化沟生物选择池泵污泥池污泥污泥回流剩余污泥排回厂里沉灰池泵2ThemethoddesignforSugarfactorywastewaterAbstract:ThisprojectisdesignedforSugarfactorywastewatertreatment.Themaintargetsincludetheprocessingworkshopproductionofwastewaterandsomesugarwatercoolingcycle.Everydayittreatedwastewater14400m3.Thequalityofwaterwhichenterthewastewatertreatmentplantasfollow.COD:800mg/L,BOD5:400mg/L,SS:100mg/L.Theeffluentisexpectedtosatisfytherequirement：COD≤100mg/L,BOD≤20mg/L,SS≤70mg/L,whichreachtoInregratedwastewaterdischargestandard(GB8978-1996)inAstandard.AccordingtothewaterqulityandwatervolumeinthisSugarfactory,withthetreatmenttechniqueconditionsanddischargestandard.wedecidetoadoptOxidationDitchthemaintreatmentprocess.Particularprocessisasfollow:TheslugewhichdischargedfromthesecondarysedimenttankiscollectedtoSugarfactoryPrecipitationPFAtankbyslugepipe.Thetotalconstructionexpenditureofthisprojectis7.46million,andthecostofthewastewatertreatmentis0.354yuanpercubicmeter.AdoptingtheOxidationDitchcanprotectthewaterenvironmentaroundthearea.Thecharacterofthisprocessiseasytooperateandsoon.Keywords:Sugarfactorywastewater；OxidationDitch；sewagetreatmentwastewaterlatticeRegulatetankwateroutletsedimentationtankoxidationditchSelectiontankpumpSludgetanksludgesludgerecirculationExcesssludgeblow-downtoPFAtankpump3目录摘要..............................................................................................................................1ABSTRACT:........................................................................................................................2第一部分设计说明书.......................................................................................................51绪论................................................................................................................................52工程概况........................................................................................................................62.1设计水量.....................................................................................................................62.2设计进水水质.............................................................................................................62.3处理后排放水质........................................................................................................62.4执行的主要设计规范和标准.....................................................................................73工艺方案的选择.............................................................................................................83.1制糖废水处理常用的工艺.........................................................................................83.1.1厌氧处理..............................................................................................................83.1.2好氧处理..............................................................................................................93.1.3土地处理..............................................................................................................93.2适合本设计工艺.......................................................................................................104废水处理工艺流程及其描述.......................................................................................114.1废水简易工艺流程图...............................................................................................114.2工艺流程的描述.......................................................................................................11第二部分计算书.............................................................................................................121主要构筑物和设计参数...............................................................................................121.1格栅..........................................................................................................................121.2调节池.......................................................................................................................141.3生物选择池...............................................................................................................141.4氧化沟.......................................................................................................................151.5沉淀池.......................................................................................................................171.6污泥池.......................................................................................................................2142主要设备的设计参数和选择.......................................................................................222.1氧化沟内曝气机.......................................................................................................222.2沉淀池刮泥机.............................................