旁路微氧污泥减量技术研究——曝气池中微氧处理污泥转化过程研究

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1、摘要致使能量溅溢而导致污泥产率降低。f71对比CAS工艺，新工艺污泥SVI值有明显的改善，且SVI随着水力停留时间的增加而降低。新工艺可有效改善污泥的沉降性能，抑制污泥膨胀。(81新工艺污泥MLVSS／MLSS值高于传统CAS工艺，4套装置数值都处于O．7至o．75之间，污泥活性良好。但随着微氧池内污泥水力停留时间的延长，MLVSS／MLSS呈下降趋势。(9)综合考虑新工艺COD去除率、污泥产率和污泥性能等方面后，微氧池内污泥最佳污泥水力停留时间为3d。关键词：污泥减量，微氧，停留时间，溶胞IIAbstractAsthegrowthofthesewagequantity

2、inChina，theamountofexcessiveactivatedsludgewhichistheby-productofwastewatertreatmentincreasedaybyday．Theexcessiveactivatedsludgetreatmenthassignificancestorelievelowersecondarypollutionandreducethepressureofsubsequentprocessingsludgedisposal，SOtheexcesssludgereductionresearchhasbecomeare

3、searchhotspot．Inthispaper，anewsludgereductionreactor--sidestrearnbypassoxygen--limitedsludgereductionprocessthatismodifiedfromconventionalprocesshasbeenproposed．Theoxygen—limitedsludgeretentiontimeonCODremovalrate、sludgeyieldandsludgeperformanceinnewprocessoperatingunderorganicloadwerest

4、udied，themainconclusionsareasfollows：(1)Inaerationtank，itwasfoundthattheCOD、MLSSandMLVSSallhappenedinstantlygrowthaftercompletionofoxygen—limitedsludge’Sbackflow．Thatshowedthelongerretentiontime，thesmallerconcentrationofMLSSandMLVSS．Asaresultofextendingoxygen—limitedsludgeretentiontime，e

5、ndogenousrespirationandbacterialdecayhadbeenpromoted，whichreducedtheconcentrationofreturnsludge，theconcentrationofsludgehadbeenreducedinaerationtank．(2)AllofvalueofDOinaerationtankdeclinedaftercompletionofoxygen—limitedsludge’Sbackflow，andno．4unitisoneofthebiggestdecreasingamplitude，down

6、to0．07mg／L．Thatshowedthelongerretentiontime，thelargeraerobicrateofaerobicofoxygen-limitedsludge．Thechangeofaerobicrateshowedthepresenceofmetabolicuncouplingphenomenon．(3)Asresultofextendingoxygen—limitedsludgeretentiontime，COD、MLSSandMLVSSdecreasedinaerationtankofthenewprocessatthefourth

7、houraftercompletionofoxygen-limitedsludge’Sbackflow．Asresultofextendingstarvationdurationofoxygen-limitedsludge，theattenuationofthecellswasenhanced，andendogenoussubstancesincellsdecreased．Inaerationtank，theabilityofremovalofcontaminantsgotenhancedwhenbackintothenutrient-r