膜集成技術(shù)精制乳酸工藝研究

1、南京工業(yè)大學(xué)碩士學(xué)位論文膜集成技術(shù)精制乳酸工藝研究姓名：張喜申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：邢衛(wèi)紅；李衛(wèi)星20080605ABSTRACTABSTRACTAs鯽imponanto唱anicacid，lacticacidiswidelyusedinf00d，medicine，biode伊adablematerials，commodityproductionandsoonFe肌entationisthem匈ormethodtopr

2、oducelacticacidindustriallyInthetraditionalproductionprocess，theglycosylatedstarchwaSfermented^rstlythroughneutralizedwithlimestone，andthensulphuricacid、ⅣasaddedintothefiItracedsolutionforobtaininglacticacidDuet0thelongr

3、oute鋤dlowemciency，theproductionoflacticaCidhadpoorqualityGenerally，inthe：finalproducttherewereafewofimputies，suchaSresidualsugar，bacteria，protein，pigmentandcolloidaIsubstaJlcesTherefore，thepurificationisimportantforprodu

4、cingindustriallacticacid州thhi曲quaIit)，IIltIlisstudy，theintegratedtechnologyofceramicultrafiItrationmembraneandbipolarmembraIledislysiswaLsputfonⅣa帕forproducinglacticacidinonefactoryofChinaThefennentationwaSneutralizedwit

5、hsodiumhydroxide，whichishelpful缸decrcasingthesolidpollutantsTheceramicmembraneprocesswithactivecarbonwaSinVestigatedtocIari匆thefennentationThefil缸ationexperimentswerecarriedouttostudytheef佗ctsofoperatingpar姍eters(membran

6、eporesize，TMP，CFV，temperature，concentratioIl’conCentratingratioandpH)onmepermeabilityofcemlicmemb砌eTheexperimentalrcsultssho、ⅣedmattheoptimizedoperationconditionsweretheconcentrationofactiVecarbonof2％，thetemperatufeof38℃

7、，theCFVof2ms1andmeTMPof0075MPaAndthepenIleatefluxuSingmeceramicmenbranewiththemeanporesizeof200mna玎ivedatthemaXim啪valueof4l2Lm～h1Inacertainmge，thepe冊(cè)eatefIuxincreasedwithinc陀asingCFVConsideringenergycost，theCFVshould110t

8、betoolargeThecolorremoValrateofthepenneateusingce“unicmembranes、析thactivecarbona】rrivedat99％MembranefoulingmechanismandregenerationmethodwereinvestigatedTheresultSshowedthatthemembranefoulingresultedfromthegelpol撕zationo