臭氧生物活性炭工艺深度处理焦化废水中试姚建华

/姚建华1,　魏宏斌1,　陈良才2,　章建科2,　陈辉洋2(1.同济大学环境科学与工程学院,上海200092;2.上海中耀环保实业有限公司,上海200092)　　　:　以经常规生化工艺处理后的焦化废水为研究对象,通过中试考察了臭氧/生物活性炭工艺深度处理焦化废水的效果和可行性。通过测定生化呼吸曲线及相对耗氧速率来判定焦化废水可生化性的提高程度及活性炭生物膜的成熟情况。结果表明,该工艺用于焦化废水的深度处理是完全可行的。在臭氧投加量为15mg/L的条件下,可显著提高焦化废水的可生化性,臭氧氧化对COD的平均去除率为10.13%。采用自然挂膜方法培养生物膜,生物膜的成熟时间为25d左右。在生物活性炭稳定运行后,其对COD和氨氮的平均去除率分别可达28.75%和43.80%,出水COD和氨氮的平均值分别为87.50和7.6mg/L,均达到了《污水综合排放标准》(GB8978—1996)中的一级标准。　　:　焦化废水;　深度处理;　臭氧;　生物活性炭:X703　　:C　　:1000-4602(2010)05-0109-03　　:(2009GH060062);　(0905H180700)PilotTestonAdvancedTreatmentofCokingWastewaterbyO3/BACProcessYAOJian-hua1,　WEIHong-bin1,　CHENLiang-cai2,　ZHANGJian-ke2,　CHENHui-yang2(1.CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China;2.ShanghaiZhongyaoEnvironmentalProtectionIndustryCo.Ltd.,Shanghai200092,China)　　Abstract:　Takingthecokingwastewatertreatedbyconventionalbiochemicalprocessasthere-searchobject,thefeasibilityandeffectoftheadvancedtreatmentofcokingwastewaterbyO3/BACprocesswereinvestigatedinapilot-scaletest.Theimprovementlevelofcokingwastewaterbiodegradabili-tyandthebiofilmgrowthofGACwerejudgedthroughdeterminationofbiochemicalrespirationcurveandrelativeoxygenconsumptionrate.Theresultsshowtheprocessisfeasibleinadvancedtreatmentofcokingwastewater.Attheozonedosageof15mg/L,ozonationcanimprovebiodegradabilityofcokingwastewatersignificantly,andtheaverageremovalrateofCODcanachieve10.13%.Thebiofilmisculturedbynatu-ralbiofilmformationmethod.Thematurationtimeofbiofilmisabout25days.AfterthestableoperationofBAC,theaverageremovalratesofCODandammonianitrogenare28.75%and43.80%respectively.TheaverageconcentrationsofCODandammonianitrogenintheeffluentare87.50mg/Land7.6mg/Lrespectively,meetingthefirstclasscriteriaspecifiedintheIntegratedWastewaterDischargeStandard(GB8978-1996).　　Keywords:　cokingwastewater;　advancedtreatment;　ozone;　BAC·109·第26卷　第5期2010年3月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.26No.5Mar.2010　　,,、。/,,、、[1、2],,。,A2/O,/。1　材料与方法1.1　A2/O,1(pH6～9)。1　Tab.1　Rawwastewaterqualitymg·L-1CODSS106.8～148.98.4～19.60.09～0.120.23～0.8128～72144.518.550.10.5371.2　1,0.3m3/h,、()。1　Fig.1　Flowchartofpilot-scaleO3/BAC800mm,2～4mm,1m。,100mm,2500mm。,400mm,3950mm,,350mm,1500mm,ZJ-15,。。3～5d,4.8m3/h。15mg/L,90%。,,6～7d,10～12L/(m3·s),20%,8～12min。1.3　COD:COD;:—;:;:;SS:。2　结果与讨论2.1　2.1.1　2。2　、Fig.2　Oxygenconsumptionrateofactivatedsludge,effluentsofsandfilterandozonation2:,,0.083mg/(L·min),0.094mg/(L·min),0.011mg/(L·min),,,。0.24mg/(L·min),0.229mg/(L·min),,·110·第26卷　第5期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　。2.1.2　CODCOD106.8～148.9mg/L,131.61mg/L;COD94.45～133.9mg/L,118.27mg/L,COD10.13%。COD,,,COD。2.2　2.2.1　,、。,,。,。3。3　Fig.3　Oxygenconsumptionrateofbackwashingwaterduringnatrualbio-filmformationonactivatedcarbon3:,,;20d30d,20d,,,25d。2.2.2　COD、,COD。COD100.3～133.90mg/L(123.03mg/L),COD70.79～96.26mg/L(87.50mg/L),《》(GB8978—1996),COD28.75%。COD,,。,25dCOD28.75%,120d,COD25%。,COD,,,COD,CODCOD。2.2.3　,9.8mg/L,5.6mg/L,7.6mg/L,43.80%,GB8978—1996。,,。3　结论①　/。,COD28.75%43.80%。②　,,。③　25d。:[1]　,.[J].,2009,32(7):125-127.[2]　LiLaisheng,ZhuWanpeng,ZhangPengyi,etal.Compari-sonofAC/O3-BACandO3-BACprocessesforremo-vingorganicpollutantsinsecondaryeffluent[J].Chemo-sphere,2006,62(9):1514-1522.E-mail:[e-mail]:2009-12-20·111·姚建华,等:臭氧/生物活性炭工艺深度处理焦化废水中试第26卷　第5期