پديد آورنده :
كريمي، كيخسرو
عنوان :
توليد اتانول از تركيبات ليگنوسلولزي
گرايش تحصيلي :
﴿مهندسي شيمي﴾
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
[نه]، 109، [I]ص.: مصور، جدول، شكل، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
محمد جعفر طاهر زاده، گيتي امتيازي
استاد مشاور :
علي اصغر انصافي
توصيفگر ها :
هيدروليز آنزيمي , آنزيم سلولاز , روشهاي تخميري , شيكر انكوباتور , هيدروليزيت اسيدي , موكور اينديكوس , قارچ موكور , مخمر پيكيا
استاد داور :
محمود شيخ زين الدين، فضيلتي، محمد قريشي، شاپور رود پيما
تاريخ ورود اطلاعات :
1396/02/23
رشته تحصيلي :
مهندسي شيمي
كد ايرانداك :
ID136 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstractr Ethanol from renewable resourceshas beenof interest in recentdecadesas an alternative fuel or oxygenate additive to the current fossil fuels Lignocellulosic materials are cheap renewable resources available in large quantities The dominant materials in lignocellulosesare cellulose hemicelluloseand lignin The celluloseand hemicellulose can be hydrolyzed chemically or enzymatically to the corresponding monomeric sugars 1 Dilute sulfuric acid hydrolysis is a chemical hydrolysis used either for the pretreatment before enzymatic hydrolysis or for the conversionof lignocellulose to the corresponding sugars The results of this work showthe ability of single stage hydrolysis to depolymerize hemicellulose of rice straw to a maximum yield of 80 8 xylose at hydrolysis pressureof 15 bar 10 min retention time and 0 5 a cidconcentration The high concentration of xylose in the resultedhydrolyzatedemandsa xylose fermenting microorganismfor ethanol production We have testedthe ability of two fungi Mucor indicus and Rhizopusoryzae in ethanol production from hexosesand xylose in dilute acid lignocellulosic hydrolyzate These fungi have valuable biomass since it contains significant quantities of chitosan M indicus could successfullyproduce ethanol from xylose rich hydrolyzateof rice straw but as not good as Pichia stipitis in ethanolyield The fungus also show a good resistanceto the inhibitors presentedin the hydrolyzate However the xylose utilization by M indicus was sensitive to aeration rate In a part of this work after initial growth of M indicus in 500 ml enzymatic wheat hydrolyzate lignocellulosic hydrolyzate was fermented with feeding rates 0 1 and 0 2 h 1 The fungus consumedmore than 46 of the initial xylose while less than half of this xylose was excreted in form of xylitol The ethanol yield was 0 43 gig consumed sugars In another part of this work ethanol was produced in continuous cultivation With addition of enzymatic wheat hydrolyzate biotin and a nitrogen source to dilute acid hydrolyzate it is possible to produce ethanol continuously with a yield as high as 0 44 g ethanolper g of consumedsugars Ethanol production from cellulose fraction of rice straw performed by simultaneous saccharification and fermentation SSF with Saccharomyces cerevisiae M indicus and R oryzae where the i latter had the best ethanolyield as 74 from rice straw followed by M indicus with an overall yield of 68 with 15 FPU g DM of cellulase J I f f T I JifJ If jJ c J
استاد راهنما :
محمد جعفر طاهر زاده، گيتي امتيازي
استاد مشاور :
علي اصغر انصافي
استاد داور :
محمود شيخ زين الدين، فضيلتي، محمد قريشي، شاپور رود پيما
