氮源对气相生物滴滤床净化效果的影响刘强

刘　强　汪凤诞　马广大　王艳芳(,710055)　　。,,。,。NH-4-N,、,,NO3-N。　　　　Thenitrogensource'seffectsontheperformanceofairphasetricklingbiofilterLiuQiang　WangFengdan　MaGuangda　WangYanfang(Xi'anUniversityofArchitecture&Technology,Xi'an710055)Abstract　Thenitrogensource'seffectsonthepurificationperformanceofairphasetricklingbiofilteraresignifi-cant.Becauseoftheunevendistributionofnutrientliquidinthefilter,thenitrogensourcesareinaccessibletobacteri-umatsomepartsofthesolidmediathatcausethedecreaseofpurificationefficiency.Increasingthemassdensityofni-trogensourcesinthenutrientliquidcanlargelyenhancetheperformanceoffilter.UsetheNH-4-Nasthesolenitrogennutrientsourceresultsinunevendistributionofnutrientsourceandthedevelopmentandaccumulationofnitrifyingbac-teria,whichwillcompetewithVOCdegradatorinthedissolvedoxygen,nitrogennutrientsourceandthespacebetweenthesolidmedium.ChooseNO-3-Nasthesolenitrogennutrientsourcecanamelioratethisstatus.Keywords　airphasetricklingbiofilter;themassconcentrationofnitrogensource;thevarietyofnitrogensource;performanceofpurification:(01JK186):2002-08-20;:2002-12-16:(1978～),,,,。　　(VOC),、、,。,VOC,。,(NH-4-N);,(VOC),、。,,。Matthew[1],,30gm3·h,。Weckhuysen[2],86%97%。。1　100mm,,(t)=17.0—84.8s,50—3500mgm3,0.046—0.764m3(m2·h),pH=7—8,(T)=18—33℃。、[3]。2　。,,,。。1(46Vol.4,No.620036TechniquesandEquipmentforEnvironmentalPollutionControlJun.2003)。1,t=21.2s,(Ci)≈2261.4mgm3,NH4Cl(CN)=0.025gL,85%;NH4ClCN=0.050gL,100%。,。1　,2　,2Ci≈2261.4mgm3,。,,()。,,。,,,,,。,,,、,,;,,,,,。,,,。,,,()。,,,。,。,,,,,。3　,,。,VOC。,,。1。,t=17.0s,,1.76,7.6%。,,。()。1　(s)(mgm3)(mgm3)(mgL)(mgL)17.0646.92058.40196.718.818.84.43.3,CO2CO2-3,NH-4NO-2NO-3,O2。,、624[4]。,,,,。,,、(,)。Smith[5],NH-4-N,VOC,NO-3-N,。3t=17.0s,(,0.002molL),。,,;,。3　t=17.0s,,,,。,();,NH-4-NNO-3-N,NO-3-N。,,,()。,,;,,,,。,NO-3-N,,VOC,NO-3-N,,,,(3)。,,NO-3-N。4　　BOD∶N≈100∶5;,,,,;,,。,。,,CODN≤143(COD,N),;,CODN≤184,。,CODN。NH-4-N,VOC、,,NO-3-N,。[1]MatthewJ.Gribbins,RaymondC.Loethr.Effectofmediani-trogenconcentrationonbiofilterperformance.JournalofAir&WasteManagementAssociation,1998,48:216—226[2]WeckhuysenB.,VriensL.,VerachtertH.Theeffectofnutri-entsupplementationonthebiofiltrationremovalofbutanolincontaminatedair.AppliedMicrobiologyandBiotechnology,1993,39:395—399[3],..,2001,():30—32[4]XueqingZhu,MollyJ.Rihn,MakramT.Suidan,etal.TheeffectofnitrateonVOCremovalintricklingbedbiofilter.Wa-terScience&Technology,1996,34(3—4):573—581[5]SmithF.L.,SuidanM.T.,SorialG.A.,etal.Tricklebedbiofilterperformance:BiomasscontrolandN-nutrienteffects.ProceedingsoftheWaterEnvironmentFederations67thAnnualConferenceandExposition,Chicago,IL,October,1994.15—19(责任编辑:刘　颖)636　: