TY  - JOUR
T1  - Microorganism and Pretreatment Effect on Lignocellulosic Bioethanol Production
AU  - Bayrakcı Ozdıngıs, Asiye Gül
AU  - Kocar, Gunnur
PY  - 2018
DA  - December
JF  - Gazi University Journal of Science
PB  - Gazi University
WT  - DergiPark
SN  - 2147-1762
SP  - 1033
EP  - 1046
VL  - 31
IS  - 4
LA  - en
AB  - The effects of pretreatments applied to raw materials and microorganismselection in lignocellulosic bioethanol production were investigated. It hasbeen found that the yield of enzymatic pretreatment process applied after thechemical pretreatment is about 4 times higher than that only chemical.Enzymatic pretreatment used process yield is 3.5 times higher than thatchemical pretreatment. When the microorganism ethanol production yield valuesof Saccharomyces cerevisiae and Pichia stipitis were examined, it wasfound that S.cerevisiae was superiorto P.stipitis in chemical pretreatedreactors (about 1.7 times higher) while P.stipitis’ yield was higher about 1.2 times in enzymatic pretreatedreactors. When the reactors which have been pretreated with both chemical andenzymatic hydrolysis and P. stipitisandS. cerevisiae used separately wereexamined, it was observed that there was not a great difference in terms ofethanol production yield. C. thermocellum’sethanol yield was found about 3 times lower than the S. cerevisiae and P.stipitis. According to the obtained data, it was seen that S. cerevisiae could produce ethanol withhigher efficiency than P. stipitis.At the same time, the difficulty of C.thermocellum’s production conditions, high energy demand and high risk ofcontamination, and low ethanol production yield, it is thought that it can onlybe used in the research phase for now. But in particular, by investigatingextracellular cellulase enzyme system of C.thermocellum, genetic modifications are predicted to play an important rolein the future in the second generation bioethanol production process.
KW  - Clostridum thermocellum
KW  - Saccharomyces cerevisiae
KW  - Lignocellulosic ethanol
KW  - Pichia stipitis
KW  - Pretreatment
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UR  - https://dergipark.org.tr/en/pub/gujs/issue//386574
L1  - https://dergipark.org.tr/en/download/article-file/584952
ER  -