处理低碳源污水的倒置A2O工艺强化脱氮调控陈杰云

A2/O陈杰云1,　张　智1,2,　李　勇3,　毛伯林3,　陈永红3(1.重庆大学三峡库区生态环境教育部重点实验室,重庆400045;2.重庆市城镇污水治理工程技术研究中心,重庆400000;3.重庆排水有限公司鸡冠石污水处理厂,重庆400063)　　　:　重庆市某大型污水处理厂采用倒置A2/O工艺处理低碳源城市污水,针对其在运行中存在的反硝化能力不足、脱氮除磷效果不佳和调控技术的缺陷,进行了强化脱氮综合调控技术的生产性试验研究。在2008年的常温和高温季节,采取投加垃圾渗滤液(投配率为0.1%)、缩短初沉池的HRT为原来的1/3、提高污泥浓度到4500mg/L、设置好氧第1段为反硝化过渡段及提高回流比等措施后,增加可利用碳源达15%以上,出水NH3-N为2.5mg/L,对其去除率为90%;出水TN为17mg/L,对TN的去除率提高至54%,单位电耗减少了15%(降至0.22kW·h/m3)。在2008年—2009年的低温季节,采取了提高污泥浓度到约6000mg/L、控制好氧区的DO为1.2mg/L等措施,出水NH3-N为3mg/L,对NH3-N的去除率为88%;出水TN为15.5mg/L,对TN的去除率为62%。　　:　倒置A2/O工艺;　低碳源污水;　强化脱氮;　温度;　综合调控:X703　　:A　　:1000-4602(2010)19-0032-05　　:(2009ZX07315-002)ComprehensiveRegulationTechnologyforEnhancingNitrogenRemovalfromLow-carbonWastewaterinReversedA2/OProcessCHENJie-yun1,　ZHANGZhi1,2,　LIYong3,　MAOBo-lin3,　CHENYong-hong3(1.KeyLaboratoryofThreeReservoirRegion'sEco-EnvironmentMinistryofEducation,ChongqingUniversity,Chongqing400045,China;2.ChongqingEngineeringResearchCentreforMunicipalSewageTreatment,Chongqing400000,China;3.JiguanshiWWTP,ChongqingDrainageCo.Ltd.,Chongqing400063,China)　　Abstract:　ReversedA2/Oprocesswasusedtotreatlow-carbonwastewaterinalargeWWTPinChongqing,andafull-scaleexperimentalstudyoncomprehensiveregulationtechnologyforenhancingni-trogenremovalwasconductedtosolvepoordenitrificationcapacity,unsatisfactorynitrogenandphosphor-usremovalanddefectofregulationtechnologyin2007.Whentheproposedmeasures,suchasdosing0.1%landfillleachate,shorteningHRTto1/3intheprimarysedimentationtank,increasingthesludgeconcentrationto4500mg/L,settingthetransitionzoneinthefirstaerobicstageandimprovingtherefluxratioandsoon,areappliedatnormalandhightemperaturein2008,over15%ofcarbonsourcecanbeadded.TheeffluentNH3-NandTNare2.5mg/Land17mg/L,andtheirremovalratesare90%and54%respectively.Theunitelectricityconsumptionisreducedby15%to0.22kW·h/m3.Whenin-creasingtheMLSSto6000mg/LandcontrollingDOat1.2mg/Latlowtemperaturein2008to2009,·32·第26卷　第19期2010年10月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.26No.19Oct.2010theeffluentNH3-NandTNare3mg/Land15.5mg/L,andtheirremovalratesare88%and62%re-spectively.　　Keywords:　reversedA2/Oprocess;　low-carbonwastewater;　enhancingnitrogenremoval;　temperature;　comprehensiveregulation　　,、80%,,,,COD200mg/L,[1],。A2/O、、,[2、3];,、,。,。A2/O,。1　试验场地及方法,60×104m3/d(135×104m3/d),,20×104m3/d。A2/O,,3。1,。BOD5/TN4.0,BOD5/TN2.5,。GB18918—2002B。1　Tab.1　Influentqualitymg·L-1　CODBOD5SSTPNH3-NTN360180250535452401003205.426.243　　BOD5、COD、SS,;NH3-N0.5mg/L,95%;TN、TP,37%、40%,。20073、,TN、TP。3,,MLSS,,SS。,2008—2009。2　常高温季节的综合调控及其效果2.1　2.1.1　,TP,,、—。2.4t/d,。2.1.2　①　HRT,。62,HRT1.69h0.56h,A2/O。②　2007,,400t,0.1%。,。2.1.3　①　2008—1,,NH3-N。,1,,,DO。②　·33·陈杰云,等:处理低碳源污水的倒置A2/O工艺强化脱氮调控第26卷　第19期MLVSS/MLSS0.3～0.45,0.7。(3300mg/L),(MLVSS),。MLSS4500～5000mg/L。③　,,。,TN,、200%100%,。2.2　2.2.1　A2/O,[4]。,COD5000～8000mg/L,NH3-N400～1000mg/L,COD/TN7～15,COD/TN,,。,、。0.1%,,[5]。、COD,2。2　、CODTab.2　ChangeofCODbeforeandaftershorteningHRTinprimarysedimentationtank　COD/(mg·L-1)COD/(mg·L-1)/%26017233.837024035.129418038.727722518.738830222.140232020.3　　,3(6)COD35%,3(4)COD20%,COD15%。,。1/3,。2.2.2　NH3-N,2008、,NH3-N90%。NH3-N,NH3-N2.5mg/L,,NH3-N。,MLSS4500mg/L,,。2.2.3　TN2008TN54%,,TN17mg/L,。:①,,。②,,。③[6]。4500mg/L,DO1.5mg/L,[7、8],,DO1～3mg/L,。④DO,,,5500mg/L,25%,,,。2008SS4～12mg/L,,1DO。2.2.4　1。,、、,0.22kW·h/m3,15%,(0.275kW·h/m3)[9]。,,,。,·34·第26卷　第19期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　=0.34X-0.168,,,[10]。,A2/O,,DO、NH3-N,,4.5。60%,,。1　2008Fig.1　Unitelectricityconsumptionin20083　低温季节强化脱氮综合调控及效果分析3.1　TN17～19mg/L,,,,3～4d。,2008—2009。3.1.1　,、[11],。200811,,,5500～6000mg/L,0.04～0.05kgBOD5/(kgMLSS·d)。3.1.2　DO。,,,,。DO(1.2mg/L),。3.2　,、3。3　、Tab.3　Influentandeffluentqualityatlowtemperatureafterregulationmg·L-1　TNNH3-N20081240.015.523.53.02009141.015.122.83.82009239.315.425.82.52009340.015.630.42.0　　3,TN15.5mg/L,A。NH3-N3mg/L,。。:,,DO,,。,,。(),,,,,。,,,,,。4　结论①　0.1%,,。HRT1/3,15%。②　,1DO,NH3-N90%,TN54%,15%。·35·陈杰云,等:处理低碳源污水的倒置A2/O工艺强化脱氮调控第26卷　第19期③　,5500～6000mg/L、DO1.2mg/L,TN15.5mg/L,TN62%。④　,,,。:[1]　,,.CODC/N[J].,2005,21(12):19-23.[2]　StrousM,VanGervenE,ZhengPing,etal.Ammoniumremovalfromconcentratedwastestreamswiththeanaero-bicammoniumoxidation(anammox)processindifferentreactorconfigerations[J].WaterRes,1997,31(5):1955-1962.[3]　,,,.A2/O[J].,2003,29(3):22-25.[4]　LemaJM,MendezR,BlazquezR.Characteristicsoflandfillleachatesandalternativesfortheirtreatment:Areview[J].Water,Air,SoilPollut,1988,40(3-4):223-250.[5]　,,,.A2/O[J].,2009,25(13):7-9.[6]　,.A2/O[J].,2006,24(3):29-30.[7]　RobertsonLA,vanNielEWJ,TorremansRAM,etal.SimultaneousnitrificationanddenitrificationinaerobicchemostatculturesofThiosphaerapantotropha[J].ApplEnvironMicrobiol,1998,54(1):2812-2818.[8]　HolmanJB,WarehamDG.Oxidation-reductionpoten-tialasamonitoringtoolinalowdissolvedoxygenwastewatertreatmentprocess[J].JEnvironEng,2003,129(1):52-58.[9]　,,,.[J].,2008,34(10):42-45.[10]　,,,.[J].,2004,20(5):35-38.[11]　QiaoXL,ZhangZJ,ChenQX,etal.Nitrificationchar-acteristicsofPEGimmobilizedactivatedsludgeathighammoniaandCODloadingrates[J].Desalin