资源描述：
《Two-liquid-phase bioreactors for enhanced degradation of.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、Biodegradation10:219–233,1999.219©1999KluwerAcademicPublishers.PrintedintheNetherlands.Two-liquid-phasebioreactorsforenhanceddegradationofhydrophobic/toxiccompoundsEricDeziel´1;2,YvesComeau2&RichardVillemur1;1CentredeMicrobiologieetBiotechnologie,INRS-InstitutArmand-Frappier,531Boul.
2、desPrairies,Laval,Qu´ebec,CanadaH7V1B7;2D´epartementdesG´eniesCivil,G´eologiquesetdesMines,EcolePolytechniquede´Montr´eal,P.O.Box6079,StationCentre-ville,Montr´eal,Qu´ebec,CanadaH3C3A7(authorforcorrespondence)Accepted4February1999Keywords:bioavailability,biodegradation,bioreactor,bio
3、treatment,NAPL,toxicityAbstractTwo-liquid-phaseculturesystemsinvolvetheadditionofawater-immiscible,biocompatibleandnon-biodegradablesolventtoenhanceabiocatalyticprocess.Two-liquid-phasebioreactorshavebeenusedsincethemid-seventiesforthemicrobialandenzymaticbioconversionofhydrophobic/to
4、xicsubstratesintoproductsofcommercialinterest.Theincreasingpopularityofbioremediationtechnologiessuggestsanewareaofapplicationforthistypeofbioreactor.Thetoxicityandthelimitedbioavailabilityofmanypollutantsareimportantobstaclesthatmustfirstbeovercomeinordertoimprovebiodegradationprocess
5、es.Two-liquid-phasebioreactorshavethepotentialtoresolvebothlimitationsofbiotreatmenttechnologiesbytheenhancementofthemass-transferrateofcompoundswithlowbioavailability,andbythecontrolleddeliveryofapolartoxiccompounds.Thistechnologycanalsobeusefulinacceleratingtheenrichmentofmicroorgan
6、ismsdegradingproblematicpollutants.Inthispaper,wediscusstheapplicationoftwo-liquid-phasebioreactorstoenhancethebiodegradationoftoxic/poorlybioavail-ablecontaminants.Importantmicrobialmechanismsinvolvedinthistypeofsystemaredescribed.Uptakeofthesubstratescanbeachievedbymicroorganismsfre
7、elydispersedintheaqueousphaseand/orboundattheinterfacebetweentheaqueousandtheimmisciblephases.Productionofsurface-activecompoundsandadhesionabilitiesaremicrobialfeaturesinvolvedintheprocess.Generalguidelinesforthedesignoftwo-liquid-phasebioreactorsforbiodegradationpurposesarepresented
8、.Solv
