城市污水处理厂出水低浓度污染物的生物降解研究

47环境工程学报Vol.4,No.720107ChineseJournalofEnvironmentalEngineeringJul.2010李德生雷海东(,100044),,,,NH3-NCODBOD5TP2714mg/L5712mg/L2014mg/L117mg/L16NTU,,3m,1h,2B1;2m,015h,1B1,NH3-N0113mg/LCOD7155mg/L(CODMn)BOD50178mg/LTP016mg/L0113NTU,.X703A1673-9108(2010)07-1529-08StudyonbiodegradationoflowconcentrationpollutantsofeffluentwaterfrommunicipalwastewatertreatmentplantsLiDeshengLeiHaidong(SchoolofCivilEngineering,BeijingJiaotongUniversity,Beijing100044,China)AbstractDuetosteadyperformance,lowconcentrationpollutantsofeffluentwaterfrommunicipalwastewatertreatmentplantsarenoteasilyremoved.Toexplorearapiddirectenhancedmethod,anexperimentalstudyonremovaleffectoflowconcentrationpollutantsofeffluentwaterfrommunicipalwastewatertreatmentplantswascarriedoutthroughabiologicalzeoliteaeratedfilterwithaclinoptilolitecationofrichdivalen.tTheresultsshowedthatwhentheannualaverageconcentrationsofNH3-N,COD,BOD5,TPandturbidityofeffluentwaterfrommunicipalwastewatertreatmentplantswere2714mg/L,5712mg/L,2014mg/L,117mg/L,and16NTU,respectively.Thefinalaverageconcentrationsofthemwere0113mg/L,7155mg/L,0178mg/L,016mg/Land0113NTU,respectivelywiththetreatmentofthetwostagebiologicalzeoliteaeratedfilterseriesprocess,whichmeettherequirementofthecirculatingcoolingwaterinheatandpowerplants.Operationconditionsofthetwostagebiologicalzeoliteaeratedfilterwerethehydraulicretentiontime(HRT)of1handthegas-waterratioofthefirststageof2B1andwiththeloadingbiologicalzeoliteof3mheigh,tandthehydraulicretentiontime(HRT)of015handthegas-waterratioofthesecondstageof1B1withtheloadingbiologicalzeoliteof2mheigh.tTheadvancedtreatmentmethodprovidesaneconomicalandeffectivereusetechnologyforeffluentwaterfrommunicipalwastewatertreatmentplants.Keywordsmunicipalwastewatertreatmentplan;tbiologicalzeoliteaeratedfilter;advancedtreatmen;tcirculatingcoolingwater:(2003G045-C):2009-07-17;:2009-12-06:(1965~),,,E-mai:[e-mail][1]4,,,(C/N),,[1~6],,,[7,8][9~14],(C/N)[15~17],[7,8],,111120m3/d,68%,32%,)))56(GB18918-2002)1200456(GB50335-2002),:5NTU,BOD510mg/L,COD60mg/L,TP1mg/L,NH3-N1mg/L(CODCrCODMn)BOD5pH12004Table1Waterqualityofamunicipalwastewatertreatmentplantin2004()SS(mg/L)133~199--(NTU)-15~17-BOD5(mg/L)108.9~144.914.5~25.684.5COD(mg/L)314.8~360.254.6~60.883NH3-N(mg/L)31.1~35.824.0~28.421.7NO-2N(mg/L)1.3~2.82.2~6.1-NO-3N(mg/L)8.5~15.623.1~34.6-TN(mg/L)60.5~71.248.2~62.816.1TP(mg/L)3.78~4.431.52~1.8658.9pH6.87.2-(e)8~288~28-NH3-NTP[18],SS,,1121,2,12m21m20cm,,,,115~315h,113,4B1,20d,NH3-N93%,2Table2Testparametersofexperimentalapparatus(mm)(mm)(mm)(h)(m/h)(d)()1Á200@500030000.5~2.51~2.51.2~32m3~430~502Á200@400020000.5~2.50.25~12~81m5~730~5015307:1Fig11SchematicdiagramofexperimentalapparatusNH3-N[19,20][7,21]:2NH+4+CaX(NH4)2X+Ca2+():2NH+4+3O22NO2-+2H2O+4H+()2NO2-+O22NO3-(),NO-2-NNO-3-NNH3-N,(NH3-NNO-2-NNO-3-N)NH3-N:=(CNH+4,0-CNH+4)/CNH+4,0@100%=(CTN,0-CTN)/CNH+4,0@100%=(CNO-CNO,0)/CNH+4,0@100%:C0C(mg/L)NH+4NH3-N,TN=NH3-N+NO-2-N+NO-3-N,NO=NO-2-N+NO-3N22112.1.1第1生物沸石曝气滤池对NH3-NCODCr/CODMnBOD5浊度和总磷去除效果的影响32B1,NH3-NCODCr/CODMnBOD5115h,NH3-NCODCr/CODMnBOD593%80%89%90%46%1NH3-N,NH3-N,NH3-N,NH3-N,,,NH3-N2.1.2第2生物沸石曝气滤池对NH3-NCODMnBOD5浊度总磷去除效果的影响31B1,NH3-NCODMnBOD5015h,NH3-NCODMnBOD595%34%66%90%35%,NH3-NCODMnBOD5C/N2,,2.21115h,2015h,4153143NH3-NCODCr/CODMnBOD5Table3EffectofsewagehydraulicretentiontimeonremovalofNH3-N,CODCr/CODMn,BOD5,turbidityandTP1)(h)1(mg/L)1(2)(mg/L)1()2(mg/L)2()(d)NH3-N1.0(0.25)1.5(0.5)2.0(0.75)2.5(1.0)24.0~28.424.0~28.424.0~28.424.0~28.42.5~2.81.6~2.01.6~1.91.6~2.0909393.2930.20.10.10.192959596122015151.0(0.25)1.5(0.5)2.0(0.75)2.5(1.0)54.6~60.8(CODCr)54.6~60.8(CODCr)54.6~60.8(CODCr)54.6~60.8(CODCr)16.4~18.2(CODMn)10.4~12.3(CODMn)10.2~12.3(CODMn)9.1~10.6(CODMn)7080818313.7(CODMn)7.5(CODMn)7.3(CODMn)5.9(CODMn)2034354012201515BOD51.0(0.25)1.5(0.5)2.0(0.75)2.5(1.0)14.5~25.614.5~25.614.5~25.614.5~25.62.5~4.81.5~2.81.4~2.61.5~2.7828990892.10.70.70.65066687012201515(NTU)1.0(0.25)1.5(0.5)2.0(0.75)2.5(1.0)15~1715~1715~1715~173.0~3.41.4~1.81.7~2.01.4~1.8809088901.30.160.190.136090909212201515TP1.0(0.25)1.5(0.5)2.0(0.75)2.5(1.0)1.52~1.861.52~1.861.52~1.861.52~1.860.96~1.190.82~1.010.82~1.010.80~1.00364646471.150.590.590.5720353536122015151)2,14Table4Effectofgas-waterratioonremovalofNH3-N,CODCr/CODMn120.5B11B12B14B10.5B11B12B14B1NH3-N()88.591.293.391.692.495.893.392.6()68.575.180.683.728.734.635.240.54,,,NH3-N,,,C/N,12B1,21B1,2132.3.1第1生物沸石曝气滤池中生物沸石的装填高度对处理能力的影响(1)NH3-N1:(CODCr)5812(mg/L),NH3-N2516(mg/L),115h,2B1CODCr/CODMnNH3-N2310,220cm2CODCr/CODMnFig.2ChangeofCODCr/CODMnremovalalongbiologicalzeoliteaeratedfilter15327:3NH3-NFig.3ChangeinNH3-Nremovalratealongbiologicalzeoliteaeratedfilter23,1112m,,[7,8](2)12m,2m,2m(4),1NH3-N2516mg/LNO-2-N316mg/LNO-3-N2812mg/LTN5316mg/L4,NH3-N1m,,1.2m;NO-2-N1m,,NH3-N,NO-2-N,1m013mg/LNO-3-N2m,NH3-N;TN1m,,TN;2mNO-3-NTN,,,,,NO-3-N,,NO-3-N,NO-3-N,,63%,C/N,C/N,,,4Fig.4Changeinnitrogenconcentrationalongbiologicalzeoliteaeratedfilter2.3.2第2生物沸石曝气滤池中生物沸石的装填高度对处理能力的影响(1)NH3-NCODMn2:CODMn1115mg/L,NH3-N116mg/L,015h,1B1CODMnNH3-N5610,220cm5CODMnFig.5ChangeinCODMnre