城镇污水系统测评论文.docx
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城镇污水系统测评论文.docx

城镇污水系统测评论文.docx

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PAGE\*MERGEFORMAT20-MScEnvironmentalEngineeringCEG8104:WastewaterEngineeringCourseworkAssessingtheperformanceofamunicipalwastewatertreatmentplantStudentname:JianZangStudentnumber:150015237ModuleLeader:Dr.PaulJ.SallisSubmissiondate:13/January/2016IntroductionSamplewaterwasthewastewatertakenfromOldcastlecitymunicipalwastewatertreatmentplant(PE=150,000),threedifferentsamplesweretakenfromdifferentstage,theywererawsewage=R(takenafterscreeningandgritremoval),settledsewage=S(takenafterthePrimarySedimentationTank),finaleffluent=F(takenatthepointofdischargetothereceivingwater),andisnowpollutingtoRiverTiny.AimsToevaluatethequalityofthreedifferentstagesamplewater(R,S,andF),andcalculatetheremovalefficiencyandthentocomparethesevaluetothetypicalvalueoftypicalwastewatertreatmentplants.TocomparethequalityofsamplewaterapplytheUKwastewatertreatmentstandard(HYPERLINK"http://webarchive.nationalarchives.gov.uk/20130822084033/http:/www.defra.gov.uk/environment/water/quality/uwwtd/default.htm"\t"_top"UrbanWasteWaterTreatmentDirective(91/271/EEC),whichobjectiveistoprotecttheenvironmentfromadverseeffectofurbanwastewaterdischarge.Objectives-ToevaluatetheOxygendissolvedquantityforindustrialwaterfromOldcitymunicipalwastewatertreatmentplantbyusingChemicalOxygenDemand(COD)andBiologicalOxygenDemand(BOD5)tests.-ToweightthevalueforsolidsforwastewaterbyusingTotalSuspendedSolids(TSS)andVolatileSolids(VS)tests.-TocalculatetheconcentrationofNitrogenparameterbymeansofTotalKjeldahlNitrogen(TKN)forreducedorganicnitrogen,Ammonianitrogen(NH3-N).-TocomparetheBOD,COD,TSS,TKNandNitrogenammoniaremovalefficiency(%removal)resultswithUWWTRegulations(1991)value.-Comparetheremovalefficiency(%removal)observedwiththetypicalremovalthatisexpectedfromtheprimarytreatmentstageandsecondarytreatmentstageseparately.Methods2.1Threestagewastewater(R,S,andF.)willbeobservedseparatelyindifferentparameterBOD0,BOD5,COD,TKN,Nitrogenammonia,TSSandVSSsolidspart.(Forincreasingthereliabilityand