AB二段法处理高含盐量皂化废水的研究刘洁玲

·19·IndustrialwaterWastewaterVol.30NO.11999A_B刘洁玲(300400):本文对高含盐量环氧丙烷皂化废水生化处理适用的流程及最佳运行条件进行了研究。回归出了生化反应数学模式。试验结果表明:在含盐量达2%,变化幅度小于2.5%时,采用A-B二段接触氧化法处理环氧丙烷皂化废水,不需要专门的耐盐菌种,COD总去除率可达80～86%,使处理后的出水达到GB8978-1996一级排放标准。:环氧丙烷;皂化废水;高盐驯化;接触氧化法:X783:A:1006_4826(1999)01_0019_05StudiesonHighSaltSaponificationWastewaterTreatmentbyA_BTwoStageBiologicalContactOxidationLIUJie_lingABSTRACT:Biologicaltreatmentprocessapplicabletoepoxypropanesaponificationwastewaterwithhighsaltcontentandoptimumoperationconditionarestudiedinthispaper.Themathematicalmodelofbiologicalreactionisconstructedbyregression.Theresultoftheexperimentshowsthatspecialsalt_tolerantbacteriaarenotnecessaryintreatingepoxypropanesaponificationwastewaterwiththesaltcontentupto2%(maximum2.5%)byusingA_Btwostagebiologicalcontactoxidationprocess.TotalCODremovalefficiencycanreach80～86%.ThetreatedwatermeetsClassIdischargestandardinGB8978_1996.KEYWORDS:epoxypropane;saponificationwastewater;habituationwithhighsaltcontent;contactoxi-dation:1998-10-09:1999-02-1011.1废水特性及研究目的,,,,。COD、BOD,、、、,、、,4%(wt),BOD:COD≈0.33,。1:,,1%(wt),401004%1.3%:169mg/L181514mg/L38mg/L6002006～9CODcr(mg/L)BOD5(mg/L)pHSS(mg/L)CaCl2(Wt)Ca(OH)2(Wt)1·20·IndustrialwaterWastewaterVol.30NO.119992:mg/L123pH12.0312.3012.24CODcr6062.75812.95966.3BOD5/CODcr=0.385BOD5/CODcr=0.391BOD5/CODcr=0.370CaCl235836.936895.437005.3BOD52334.32273.12207.5。、pHCOD,。,,CODcr100mg/L,,,,。1.2试验用水。2。,CODcr6000mg/L,BOD5/COD-cr≈0.388。:CODcr,lg[CODcr]=2.3753+1.88×10-4[Cl-],r=0.975。、、,。,。,,CaCl2,,,。,COD,CaCl2,pH6～9,。22.1污泥培养及含盐量驯化。、、,COD=500mg/L,N、P,、。3000mg/L,20000mg/L,,COD80%,,20000mg/LCOD:(1)20000mg/L,6000～20000mg/LCOD,,。(2),COD,,。,,,,。,,。2.2可生化性间歇试验,。COD,,25000mg/L20000mg/L,。1。:6000～20000mg/LCOD,;20000～26000mg/L,COD,,,:1.1,3CaCl220600mg/LCODCOD。2.2,4CaCl226409mg/LCODCOD。图1可生化性间歇试验图示·21·IndustrialwaterWastewaterVol.30NO.11999—※CaCl2CODA—※—※—※,KH2PO3B图3试验流程2,20000mg/L,。2.3生化流程的筛选,,:A/O、A_B。2、3。125d,,A、BOD,,,,。,。2,COD=400～600mg/L,CaCl2=20000mg/L,。4。4,COD=400～600mg/L—※—※—※—※—※,KH2PO3CODCaCl210h,COD(43～59%),14h67～73%,24h,74～80%,COD110～119mg/L,,。A_B8～10hCOD76～79%,,12～14h79～84%,COD100mg/L,,。。2.4A_B二段系统稳定运行试验,15d。,,A_BCOD,,,2%,2.5%,COD400～600mg/L。A(28833.3mg/L),2～3h,COD200mg/L,55～70%。COD、,。AB,,B。BOA图2试验流程11—COD;2—COD;3—COD4—COD;5—COD图4一段及A_B二段法试验曲线·22·IndustrialwaterWastewaterVol.30NO.11999A2.171.992.023.101.611.541.952.302.033.762.382.52B10.509.69.7715.007.757.429.4311.149.7918.1711.5012.14BOD5172.21176.20CODcr577.19516.08484.00477.06424.81407.74468.44493.51447.41546.48443.50556.873A_B(mg/L)(h)12.6711.5911.7918.109.368.9611.3813.4411.8221.9313.8814.66A(%)63.5961.0661.5266.1157.4055.6059.3763.0163.0370.3661.7066.79B(mg/L)97.6994.1388.9975.5394.5895.0492.2686.6482.9677.2287.9690.02A(mg/L)210.11200.94186.25161.66180.95179.41190.32182.56165.42161.98169.87184.95123456789101112CaCl2(mg/L)20018.419983.520102.520027.122671.024381.221709.220182.423123.719766.220000.718977.7(%)83.0781.7681.6184.1777.7476.6980.3082.4481.4685.8780.1783.83B(%)53.5153.1652.2253.2847.7347.0351.5252.5449.8552.3348.2251.33COD9448.2mg/L,B。3。3A_B,,。,,,,,Se。,COD,A、BCOD,。dsdt=KXaSe(1),Se≠0,So-SeXa·t=K(Se-Sh)(2)K—;t—;So—;Se—;Sh—;Xa—。5、6AK1=0.00102,BK2=0.0007,:A:So-Se1Xa·t=0.00102Se1-0.069800(3)(r=86.08%)B:(16)图6B段生化方程图图5A段生化方程图·16·IndustrialwaterWastewaterVol.30NO.11999Se1-SeXa·t=0.0007Se-0.039085(4)(r=86.33%)Xa28833.3mg/L9448.2mg/L,(3)、(4):A:So-Se1t=29.41(Se1-68.4)(5)B:Se1-Set=6.61(Se-55.8)(6)41、,,2%(wt),2.5%(wt),A_B,,,GB8978。2、A_B,、,,A、,,A、B,,。:,,50,(22)3.4工作交换容量,1500～1800mol/m3。3.5弱酸树脂的再生3.5.1再生方式,,,,、,。。、—,。3.5.2再生程度。,,。,,,,,H+,,。,、、,,1.2,。3.5.3再生液浓度和流速,,;,。,CaCO3,,。,2～3%,4～6m/h。,,。,、,,,,,,。,1%,10～15m/h;、,0.7～1.5%,7～10m/h。:,55,