生物滴濾器中揮發(fā)性有機(jī)物去除的關(guān)鍵影響因素.pdf

1、湖南大學(xué)碩士學(xué)位論文生物滴濾器中揮發(fā)性有機(jī)物去除的關(guān)鍵影響因素姓名：瞿畏申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：環(huán)境工程指導(dǎo)教師：楊春平曾光明20070425生物滴濾器中揮發(fā)性有機(jī)物去除的關(guān)鍵影響因素IIAbstractBiotricklingfiltrationisanestablishedtechnologyfvolatileganiccompounds(VOCs)removalfromwastegasstreams.Thistechnologyu

2、tilizesmicrobetocaptureVOCswhichattachedwithmediaithasadvantageinsomeaspectssuchaslowcosthyoperationnorecontaminationitspredominanceisobviouswhenitisusedtotreatVOCsthathavelowconcentrationaredegradedeasilybymicrobeespeci

3、ally.ThusBiotricklingfiltrationhasbecomedthehotspotrecently.GrowthaccumulationofbiofilmsinmediaofbiotricklingfiltersplayanimptantrolefVOCremoval.TheaccumulationofexcessbiofilmscaninfluenceVOCremoval.Inthispapersimplyprac

4、ticaldynamicmathematicalmodelsweredevelopedtosimulatethegrowthaccumulationofbiofilmsthespatialdynamicvariationsofthethicknessofbiofilmswithinthemediabasedongasliquiddoublefilmtheywhichisadifferentialequationsystemconsist

5、ofdynamicequationsofVOCconcentrationingasphasebiofilmphasedynamicequationsofthethicknessofbiofilm.Simultaneouslytheparametersofthesemodelswereestimatednumericalimplementationwaseastablished.ToluenewasedasthemodelVOC.Sens

6、itivitiesoftheincomingtolueneconcentrationgasemptybedcontacttime(EBCT)toVOCremovalefficienciesofbiofilterstolueneremovalefficienciestotheseparameterswerealsoinvestigated.Resultsaboutthisreserchwereshowedasbelow.Thickness

7、ofbiofilmsincreasedwithincreasedtimeatacertainlocationwithinthetricklebedprofilesofthethicknessthegrowthrateofbiofilmsalongthemediumdepthinthereactpedgraduallyatacertaintime.Thegrowthrateofbiofilmsalsoincreasedwithincrea

8、sedincomingtolueneconcentrationgasEBCTataconstanttolueneloadingrate.VOCremovalefficiencyendedatfirstdeclinedafterwardsinthecourseofoperation.VOCremovalefficiencyincreasedduetothefallofincomingtolueneconcentrationtheincre