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高氨氮废水短程硝化过程中污泥膨胀的研究侯巧玲1,2 文一波2 李林宝1 于 蓉1(1.,730070;2.,101102) 采用AO工艺处理模拟高氨氮废水,在一定条件下实现了稳定的短程硝化(积累率≥80%),污泥沉降性能良好,短程硝化后期污泥沉降性能逐渐恶化。实验结果表明,通过补充废水的NP虽然能够略微降低SVI,但是仍然不能有效的缓解污泥膨胀。当COD负荷0.27kg(kg·d)时发生污泥膨胀。将DO控制在1.5～2.0mgL,沉淀池的固液分离效果良好,并且氨氮去除率、COD去除率和亚硝氮积累率均90%,污泥膨胀现象得到有效控制。 短程硝化 污泥膨胀 AO工艺0 [1],。。1 1.1 实验水质和污泥状况,NH4Cl、NaH2PO4、CH3OH、,CN3∶1,NaOHNaHCO3pH。。,,SV=40%,SVI=98.9mLg,、,,。1.2 实验装置AO,1。1—;2—;3—;4—;5—pH;6—;7—;8—;9—;10—;11—;12—。1 ,、20、48L。100%,200%。,20%。2 2.1 短程硝化初期的污泥性状48.83mgL,189.5%。800mgL。27～30℃,pH7.5～8.6,0.5～1.0mgL1(52.4%),50%。,、COD96.8%、93.2%,90.5%。(SVI)2。2 SVISVI100mLg,,,。2.2 短程硝化期间污泥性状的改变SV3095%,SVI300mLg,,,,。COD,,3.5gL2.1gL,90%。13 20086263DOI:10.13205/j.hjgc.2008.03.027,,,,。[2]。2.3 对污泥膨胀现象的理论分析。。,。,,,,。,、、pH、、[3-5]。27～30℃,pH7.5～8.6。。2.4 采取的措施(1)C∶N∶P=300∶110∶1,。P、。,NP30∶1。SVI3。3 NPSVI3,NP100∶130∶1,SVI300mgL,NP。、,。(2)[6]。CODSVI4。4,COD0.27kg(kg·d),COD。DO4 CODSVI,1[7]。1 “”DO(kg·kg-1·d-1)“”DO(mg·L-1)0.301.00.502.00.753.00.904.0 COD0.67kg(kg·d),DO1.0mgL,“”DO。,2.0mgL。DO、、SVI5。5 DO、SVI DO2mgL,SVI118mgL,,。DO1.5～2.0mgL,(≥90%)。,。3 (1)AO,27～30℃,pH7.5～8.6,DO0.5～1.0mgL(≥80%),。(2)NP,SVI326mLg (17)14 20086263Cr(Ⅵ)Cr(Ⅲ),Cr(OH)3。,,Fe(OH)3Cr(OH)3,。3 (1)-,,,Cr(Ⅵ)Fe2+,Cr(Ⅵ)。(2):6%,pH2,4h,10g,Cr(Ⅵ)99.7%。:0.25Lmin,,。(3),,,, 。[1] ,,,..,2006,37(6):48-50[2] ,,,..,2006,124(1):39-40[3] ,,..,2000,22(5):33-36[4] ,,.().:,1995[5] ,..,2004,5(3):63-65[6] RanganathamK.Chromiumremovalbycarbonspreparedfromequisetifolialeaves.BioresourceTechnology,2000,73(2):99-103 402168 (023)49683964E-mail jeremyme@163.com2007-11-07(14)286mLg,NP。(3)COD0.27kg(kg·d)。(4)DO0.5mgL2.0mgL,SVI268mLg118mLg,,DO1.5～2.0mgL,,、COD90%。。[1] ,..,2004,24(4):266-269[2] ,.———.:,1999:234-237[3] ,,..:,2002[4] HermanowiczSW.Dynamicchangesinpopulationsoftheactivatedsludgecommunity:effectsofdissolvedoxygenvariations.Wat.Sci.Tech.,1987:889-895[5] ,..,1999,32(5):52-55[6] ,..,2003,19(7):1-4[7] ,..,2002,18(4):464-467 730046 E-mail ashly05062@163.com2007-10-3117 20086263POWDERACTIVATEDCARBON-MEMBRANEBIOREACTORFORTREATMENTOFMUNICIPALWASTEWATERPeiLiang YaoBinghua(7)………………………………………………………………………………Abstract Thecombinedprocessofpowderedactivatedcarbon(PAC)andmembranebioreactor(MBR)wasappliedfortreatmentofmunicipalwastewater.TheremovalefficienciesofCOD,NH+4-Nandturbidityinthecombinedprocesswereinvestigated.TheresultshowedthatthecombinedprocessmayachievebetterremovalefficienciesofCOD,NH+4-Nandturbidity,whenwatertemperatureisabove26℃,DOisabove4.5mgLandpHisbetween6and9.TheaverageremovalefficienciesofCOD,NH+4-Nandturbidityinthecombinedprocesswere88%,98%and98%respectively,andwasbetterthanthatofsingleMBRprocessandconventionalprocess.TheeffluentCODwaslessthan22mgLandNH+4-Nwaslessthan1mgL,turbiditywaslessthan1NTU.ItwasbetterthanthatofwaterfordomesticreusestatedbytheMinistyofConstruction(CJ25.1-89).Thefouledmembranewascleanedbywaterrinsing,water-acidrinsing,water-alkalirinsing,whichcanletitsfluxberestoredto43%,81%,89%ofanewmembranerespectively.Keywords powderactivatedcarbon membranebioreactor domesticwastewaterINACTIVATIONOFMICROBEINRUNNINGWATERUSINGMICROWAVEELECTRODELESSULTRAVIOLETLIGHTLouChaogang XiaDongsheng ZhaoFanetal(10)………………………………………Abstract E.coliandBacillussubtiliswereselectedtoexpressrespectivelytheeasilyanddifficultlyinactivatedmicrobe,andthebestirradiationtimeandthelimitturbidityofmicrowaveelectrodelessultraviolet(UV)irradiationwerestudied.Inthiscondition,checkingthedisinfectionofE.coliandBacillussubtilis,andcomparedwithmercurylampofmediumpressure.Theresultsshowedthatwhenbestirradiationtimewas210s,microwaveelectrodelessultravioletirradiationcanachieveinactivationrateof99.92%.Inordertoobtainthebestresultsofdisinfectioneffect,thewaterofturbiditywasbelow8NTU,thelimitturbidityofdisinfectionwas40NTU;microwaveelectrodelessultravioletirradiationcanachieveinactivationrateof100%with180s,andtheBacillussubtilisinactivationrateof100%with300s,itismoreeffectivethanmercurylampofmediumpressuredisinfection.Keywords E.coli Bacillussubtilis limitturbidity drinkingwater disinfectionefficiency electrodelessUVlampSTUDYONTHEBULKINGSLUDGEINTHEPROCESSOFSHORTRANGENITRIFICATIONOFHIGHAMMONIAWASTEWATERHouQiaoling WenYibo LiLinbaoetal(13)………………………………Abstract AOtechniquewasusedtotreatsimulatedhighammoniawastewater,thestabilityshort-cutnitrificationcouldbeimplementedbycontrollingtherightcontent(accumulationrate≥80%),theactivatedsludgehadgoodsettlingproperty,inthelateoftheshort-rangenitrificationitwasdegradedgradually.ItisshowedbytheexperimentalresultsthatincreasingNPratiointhewastewatercanslightlydropSVI,butstillcannoteffectivelyeasethesludgebulking.ThebulkingsludgewouldbeoccurredwhenCODloadwasabove0.27kg(kg·d).ControlledDOwith1.5to2.0mgL,thesolid-liquidseparationresultisgood,andtheremovalratesofNH+4-NandCOD,aswellasthecumulativerateofnitritenitrogenaregreaterthan90%,sludgebulkingcanbeeffectivelycontrolled.Keywords short-rangenitrification sludgebulking AOprocessTREATMENTOFWASTEWATERCONTAININGCr(Ⅵ)BYPVAMICRO-BALLENTRAPPEDIRONPOWDERANDACTIVATECARBONHuangYi(15)…………………………………………………………Abstract Micro-b