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SewagetreatmentSchoolofBiologicalandAgriculturalEngineering,JilinUniversitysewage?Usuallyreferstotheextentofthepollutionfromlifeandproduction,wastewater.domesticsewageRainearlyIndustrialwastewaterSewagetreatmentprocessAnoxic/Oxic(A/O)processAnaerobic-Anoxic-Oxic(A2/O)processOxidationditchA/OprocessA/OistheabbreviationofAnoxic/Oxic,itisthesuperiorityoforganicpollutantsinadditiontogetoutsideofdegradation,ithascertaindenitrificationandphosphorusfunction,iswillanaerobichydrolysistechnologytouseforactivesludgepre-treatment,soA/Omethodisimprovedactivesludgemethod.A/OcirculationwithinthebiologicaldenitrificationcharacteristicsHighefficiencyProcesssimpleLackofoxygendenitrificationprocessonthehighefficiencydegradationofpollutantsVolumehighloadAerobicprocessofoxygen/resistanceofimpactloadabilitydisadvantagesSincethereisnoindependentreturnsludgesystem,whichcan'tcultivateuniquefunctionofthesludge,therefractorymaterialdegradationrateislower.A2/OprocessA2/OprocessisAnaerobic-Anoxic-OxicEnglishabbreviations,itisAnaerobic-lackofoxygen-goodoxygenbiodenitrificationphosphorusremovalprocessforshort.Thisprocessefficiencycanreachthegeneral:BOD5andSSfor90%~95%,andtotalnitrogenis70%above,phosphorusis90%leftandrightsides,generallyappliedinrequirementsdenitrificationandphosphoruswastewatertreatmentplant,largeandmedium-sizedcities.A2/OprocessfeaturesPollutantremovalefficiency,stableoperation,goodresistancetoimpactload.Sludgesedimentationperformanceisgood.Anaerobic,hypoxia,aerobic

threedifferentenvironmentalconditionsanddifferentkindsofmicrobegroupsorganiccooperate,canalsohavetheremovingoforganicmatterandnitrogenphosphorusremovalfunction.A2/O

disadvantages

ReactionpoolvolumethanA/Odenitrificationandbig;

Sludgebackinlargeflow,energyconsumptionishigher;Forsmallandmediumsizewastewatertreatmentplanthighcost;Methanegasrecyclingeconomicbenefitpoor;OxidationditchAnothernameisContinuousloopreactor.Activatedsludgeprocessisakindofdeformation.Duetoitsgoodeffluentwater,stableoperationandeasymanagementtechnicalcharacteristics,athomeandabroadhasbeenwidelyusedinthesewageandindustrialwastewatermanagement.IncludingFromtheviewofoperationmode,theoxidationditchtechniquedevelopmentbasicallyhastwoaspects:oneisinatimesequenceofthesewageprocessingmainly;Ontheotherhandismainlyinaspacesequenceofwastewatertreatment.advantagesStructureformdiversityAerationequipmentdiversityAerationstrengthcanbeadjustedSimplifiedthepretreatmentandsludgetreatmentdisadvantagesSludgeinflationFoamproblemSludgefloat

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