秸稈固態(tài)發(fā)酵酒精動(dòng)力學(xué)研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文秸稈固態(tài)發(fā)酵酒精動(dòng)力學(xué)研究姓名：石堅(jiān)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：食品科學(xué)指導(dǎo)教師：孫君社劉萍20030601AbstractThebioconversionofbiomass(cornstarkandstraw)intoethanolhasbeenscenastheInostpromisingalternativebio‘energySolidstatefermentationtoproduceethanolbyco

2、rnstalkisarlefli：ctiveapproachtosolvetheproblemThearticlediscusseddiflfbrentmethodstodeterminet11eprocessparametersfirsflyThenkineticmodelsweresetupandtheModifiedSimpleGeneticAlgorithmswasappliedtodeterminethekineticpara

3、metersAtlastthebioprocesswasscaledupintwotypesofbioreactorAftercomparingtheergosterolmethod，N—Gmethodanddrynlasslossmethod，theergosterolmethodwaschosenasthebestapproachtomeasurethebiomassinthesolidstatesubstratebecauseof

4、itssimplicity，efficiencyandstabilityduringcultureprocessesTheprocessofthesolidstatefermentationwascarefullyanalyzedandtwokeyprocesses(CellulasePreparationandSimultaneousSaccharificationEthanolFermentation)havebeenseparat

5、edforfurtherstudyThemodelingassumptionswerebroughtforwardandkineticmodelwassetuponthebasisofexperimentsvalidationThenaModifiedSimpleGeneticAlgorithms，whichwasrealizationb)，MATLABGAToolbox，wasappliedtodeterminethekineticp

6、arametersTheparametersgainedbyMSGAwerecomparedwiththetraditionalLevenbergMarquardtmethodand1esultsshowedthattheMSGAwasmoreefficientandexactthanthetraditionalonewiththeobjectivefunctionvaluereducedfrom50236to44680Meantime

7、，thesolvestepsweredecreasedremarkablelyAtlast，thebioprocesswasscaledupinonerotatedrumbioreactorandonerevolveshaftbioreactorThecontrolparameterssuchassubstratehumiditystirringtime＆frequencyandflowratewereoptimizedResultss

8、howedthatthefermentationeflbctinrotatedrumbioreactorexcelledtherevolve—shaftonewith03129drybiomass，170uFPAenzymeactivitiesand00749ethanolproductionpergdrysubstrate，whichshowedasuccessfulscale。upfromflaskstobloreactoLKeyW