IC反应器对生活污水中COD的去除效果及影响因素

ICCOD高志永1,韦道领2,陈鸿汉1(1.中国地质大学北京水资源与环境学院,北京100083;2.郑州市郑汴水务有限公司,河南郑州451460):为探讨内循环厌氧反应器(IC)处理低浓度生活污水的可行性,通过不同的试验条件考察了HRT温度pH碱度(以HCO-3计)VFA等因素对IC反应器去除污水中COD的影响结果表明:当温度为18~29e时,系统对低浓度生活污水的处理效果较差,而当温度30e时,处理效果明显改善;IC反应器处理低浓度生活污水的最佳HRT为2h,在此HRT下,颗粒污泥的沉降性能明显提高,大粒径颗粒污泥增多,处理效率增强:内循环厌氧反应器;低浓度生活污水;COD;影响因素:X703:C:1000-4602(2010)17-0044-04ResearchonInfluentialFactorsofRemovalEfficiencyofCODinDomesticSewagebyICReactorGAOZh-iyong1,WEIDao-ling2,CHENHong-han1(1.SchoolofWaterResourceandEnvironment,ChinaUniversityofGeosciencesBeijing,Beijing100083,China;2.ZhengzhouZhengbianWaterCo.Ltd.,Zhengzhou451460,China)Abstract:Todiscussthefeasibilityoftreatinglow-concentrationdomesticsewageininternalcircu-lation(IC)anaerobicreactor,theinfluenceofHRT,temperature,pH,alkalinity(calculatedasHCO-3),VFAandotherfactorsonCODremovalfromdomesticsewageinICanaerobicreactorwasinves-tigated.Theresultsshowthatthetreatmentefficiencyoflow-concentrationdomesticsewageispoorerwhenthetemperatureis18to29e,andthetreatmentefficiencyincreasessignificantlywhenthetemper-aturerisesabove30e.TheoptimumHRTofICanaerobicreactorfortreatingthelow-concentrationdo-mesticsewageis2h.AtthisHRT,thesettleabilityofgranularsludgeisimprovedsignificantly,thegran-ularsludgewithlargediameterincreases,andthetreatmentefficiencyofthesystemisenhanced.Keywords:internalcirculationanaerobicreactor;low-concentrationdomesticsewage;COD;influentialfactors(IC)2080,PAQUE[1]IC,[2],,[34],IC,,IC1试验装置及方法111IC(1),#44#第26卷第17期2010年9月中国给水排水CHINAWATER&WASTEWATERVo.l26No.17Sep.201015cm130cm17.6L,,61ICFig.1SchematicdiagramofICreactor2IC,ICCOD,,2Fig.2Flowchartofexperiment112,,15L,MLSSMLVSS0.50.3g/L,MLVSS/MLSS=0.6113,,2L/h,HRT9h,HRT,15~18e,HRT9h6d,HRT(87654h)5d11d,HRT98h,CODCOD,40%;12,31,HRT4h,60%,COD,,30d2结果与讨论211COD,,,,,IC200746,,11CODTab.1InfluenceoftemperatureonCODremovalCOD/(mg#L-1)COD/(mg#L-1)/%/e18247.70123.8050.0220208.30112.7045.9021447.20202.9854.6122236.60125.3047.0423219.20103.2052.9225278.88120.4056.8327295.84120.0059.4428435.20190.4056.3029238.00100.3957.8230241.40105.0156.5030326.80123.8662.1033306104.8165.7535340.0098.6071.0034448.80129.2071.21:HRT4h1,30e,COD65%30e,COD,50%,IC(),,(SRT)HRT,,SRT#45#高志永,等:IC反应器对生活污水中COD的去除效果及影响因素第26卷第17期[5~7]IC,212HRTCODHRT8h,HRT,HRT6421h,6~7d,,33HRTCODFig.3InfluenceofHRTonCODremoval3,HRT1h,COD,HRT,,HRT2468h,IC,,,HRT,,,HRT2h,3,,,,,,,,,,213pHpH,,,,pH,pH,pH,,pH,6.5,8.2pH7.0~8.0,pH7.5,pH,,,;pH6.5~8.2,,,/0214VFA(HCO-3),/VFA2VFA3mmol/LVFA12mmol/L,,[8],HRT2h,VFA,,VFA(2.92~5.13)(0.95~1.85)mmol/L,,;,,,VFA3mmol/L,VFA2,215,,,MLSS14544mg/LMLVSS/MLSS=0.85,,IC,543210.5mm,76.571.458.3145.0340.3230m/h,,,,(下转第50页)#46#第26卷第17期中国给水排水~3.58mg/L0.166~0.588g/L20%30d,COD23~98mg/L,90%~95%,COD92~360mg/L,,SS17,,,,,,COD98mg/L,80mg/L,,3结论¹,,º,50mg/L;,,,,»,50mg/LpH6~94.65mg/LMLSS2.37g/L,COD100mg/L,:[1],.-[J].,2001,27(12):53-56.[2],.[J].,2007,(4):134-136.[3].[M].:,1998.E-mail:[e-mail]:2010-03-25(上接第46页)HRT4h,,,HRT2h,,;,,,3结论¹18~29e,;30e,,COD65%ºIC,HRT=1h,COD,HRT2468h,IC,2hHRT»pH,pH¼HRT,HRT2h,,,:[1].[J].,1999,17(3):1-5.[2],.:(2)[M].:,1999.[3],,,.(IC)[J].,2001,19(1):27-28,33.[4].UASB[M].:,2000.[5],,.[J].,2000,26(7):10-11.[6],,.[J].,1988,4(5):23-29.[7],.[J].,1994,20(1):24-27.[8].[M].:,1998.:(010)8231217413488716063E-mail:[e-mail]:2010-03-22#50#第26卷第17期中国给水排水