MSBR工艺处理低浓度城镇污水的设计与运行控制参数全玉芳

26　1620108CHINAWATERWASTEWATERVol.26No.16Aug.2010MSBR全玉芳1,　梅荣武2(1.绍兴嵊新污水处理有限公司,浙江嵊州312400;2.浙江省环境保护科学设计研究院,浙江杭州310007)　　　:　采用MSBR工艺处理低浓度城镇污水,实际运行结果表明,在进水COD、BOD5、TP、NH3-N的平均浓度分别为171、91、3、23mg/L的条件下,处理后出水的各项指标分别为26、5.3、0.27、1mg/L,达到了《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级B标准。废水的处理成本为1.22元/m3。该工艺BOD负荷应该控制在0.07kgBOD5/(kgMLSS·d)以上,夏季MLSS控制在1g/L、冬季控制在1.5g/L左右。　　:　城镇污水;　MSBR工艺;　运行管理:X703.1　　:C　　:1000-4602(2010)16-0095-04DesignandOperationParametersofMSBRProcessforTreatmentofLow-concentrationMunicipalSewageQUANYu-fang1,　MEIRong-wu2(1.ShaoxingShengxinSewagetreatmentCo.Ltd.,Shengzhou312400,China;2.EnvironmentalScienceResearchandDesignInstituteofZhejiangProvince,Hangzhou310007,China)　　Abstract:　Themembrane/sequencingbatchreactor(MSBR)processwasusedtotreatlow-con-centrationmunicipalsewage.TheresultsshowthatwhentheaverageconcentrationsoftheinfluentCOD,BOD5,TPandNH3-Nare171mg/L,91mg/L,3mg/Land23mg/Lrespectively,theireffluentcon-centrationsaftertreatmentare26mg/L,5.3mg/L,0.27mg/Land1mg/Lrespectively,whichreachesthefirstlevelBcriteriaspecifiedintheDischargeStandardofPollutantsforMunicipalWastewaterTreat-mentPlant(GB18918-2002).Thesewagetreatmentcostis1.22yuan/m3.TheBODloadforthisprocessshouldbecontrolledatabove0.07kgBOD5/(kgMLSS·d),theMLSSconcentrationinsummershouldbecontrolledat1g/Landthatinwintershouldbecontrolledatabout1.5g/L.　　Keywords:　municipalsewage;　membrane/sequencingbatchreactor(MSBR);　operationmanagement1　工程概况,7,360km2,,。20071×104m3/d,/MSBR/,、、、,,。,,,。1.1　1×104m3/d,,0.50×104m3/d。1.2　、、1。·95·26　16　、Tab.1　Designinfluentandeffluentquality　pHCOD/(mg·L-1)BOD5/(mg·L-1)SS/(mg·L-1)/(mg·L-1)TP/(mg·L-1)6.5～8.5≤350≤160≤150≤35≤46.0～9.0≤60≤20≤20≤8(15)≤1.02　处理工艺设计2.1　MSBR,MSBRSBR,A2/O+SBR。,,,(90%)。1。1　Fig.1　Flowchartofsewagetreatmentprocess2.2　MSBR,MSBR,0.5×104m3/d,。。MSBR,、、、SBR。:8～10℃;MSBR4m,3～5g/L。MSBR、。MSBR,。A2/O-SBR30m×29.5m×5.5m,10m×4.2m,1.0h;10m×9m,2.0h;(3～16)m×10m,11.5h。(SBR)(2～13.5)m×10m,1.5h、0.5h、2h。MSBR,2(11),60m3/min,58.8kPa,90kW,2980r/min。,、,,、。2,2(11),480m3/h,12kPa,5.5kW;230%。2(11),85m3/h,100kPa,4kW;41%～82%。,,。3.0～4.0g/L。3　MSBR池运行管理参数的控制BOD、COD(COD171mg/L,BOD591mg/L),。①　(DO),DO0.2mg/L,0.3～0.5mg/L,2.0～4.0mg/L。②　BODBOD(F/M)MSBR。MSBR,,,BOD5,BOD5、BOD5,。,,MSBRBOD。BOD5,,BOD,。,MSBRMLSS1g/L,1.5g/L,BOD0.07kg-BOD5/(kgMLSS·d),,·96·:MSBR26　16。③　(SRT)MSBR,。,。,,,。,7～10d。④　(R)(r),MSBR,SBR,SBR,,SBR,DO,MSBR,,SBR。,,BOD5。,,,,1.5mg/L,。,R40%～70%。40%。,SBR。(η):η=[r/(1+r)]×100%,r=η/(1-η)。r4,DO、。⑤　ORP()、ORP。,ORP-400～-200mV,ORP-300～-150mV。DO,ORP。DO0.2mg/L0.5mg/L,ORP+80mV,TP1.5mg/L。,≤5000m3/d,MSBR2。2　MSBRTab.2　ControlparametersofMSBRSBRpH7～87～86.5～86.5～8DO/(mg·L-1)0.20.52～43～5MLSS/(g·L-1)2～32～31.0～1.51.5～2/%0～230()0～230()0～230()0～230()/%40～80()40～80()ORP/mV-400～-200-150～-300+50～+150SV30/%10～1510～15　:　①SBR,。,,。t∶t∶t=90min∶30min∶120min。SBR。②DO:。8d。4　MSBR池运行效果及存在的问题,20092MSBR,《》(GB18918—2002)B,4000m3/d,MSBR。BOD0.07～0.10kgBOD5/(kgMLSS·d),、3。3　、(2008)Tab.3　Influentandeffluentqualityin2008　CODBOD5SSNH3-NTP/(mg·L-1)1719198233/(mg·L-1)265.31210.27/%84.894.287.895.691　　20092,7000m3/d,,/,。BOD0.03～0.05kg-BOD5/(kgMLSS·d)。、4。4　、(2009)Tab.4　Influentandeffluentqualityin2009　CODBOD5SSNH3-NTP/(mg·L-1)984886182/(mg·L-1)375.31451.3/%62.289.083.772.235·97·26　16　　4,COD,:①TP。(、),COD130mg/L,TP1mg/L。②COD、,。③ORP-10～10mV,TP。5　问题讨论①　MSBRCOD150mg/L,BOD0.07kgBOD5/(kgMLSS·d),,COD、,TP1.00mg/L。,,、,。②　MSBRMLSSMSBR、、、SBR,SBR、、,,,,20%～50%。SBR,SBR。,。③　MSBRSBR,;SBR,;SBR,,,SBR,,,。。④　MSBR,,,,,。,,。⑤　、、,,,、,。:[1]　.MSBR[J].,2008,26(1):31-35.[2]　,,,.A-A2/O[J].,2008,24(23):16-20.[3]　,,.MSBR[J].,2009,(16):142-143.E-mail:[e-mail]:2010-03-02(上接第94页),,,。2008,。,,,。,,,1～3,。,,。4　结语,,。,,。:[1]　.[J].,2008,7():111-113.E-mail:[e-mail]:2009-11-02·98·