期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2017
卷号：6
期号：8
页码：16963
DOI：10.15680/IJIRSET.2017.0608181
出版社：S&S Publications
摘要：Lignocellulosic biomass consists of a variety of materials with distinctive physical and chemicalcharacteristics. The conversion of Lignocellulosic biomass to ethanol involves pretreatment followed by polysaccharidehydrolysis to simple sugars followed by sugar fermentation to ethanol. Several solvents and ionic liquids, namely formicacid, concentrated phosphoric acid, were used to pretreat rice straw in order to increase cellulose digestibility for ethanolproduction. When being directly used to pretreat the raw rice straw under corresponding optimized conditions, theimprovement of cellulose hydrolyzability followed the order of concentrated phosphoric acid more than formic acid. Thisgreatly enhanced its susceptibility to enzymatic hydrolysis at 30 °C. The chemical pretreatments caused deepdeacetylation and milder delignification of rice straw and did not cause an apparent loss of cellulose. In addition fungaltreatment (Trichoderma reesei) of pretreated samples has been applied to improve the conversion of cellulosic materialin sugar. The method of concentrated phosphoric acid pretreatment and subsequent fungal treatment (in differentconcentrations) results the highest conversion of lignocelluloses in rice straw to sugar and consequently, highestethanol yields were 320 mg/gram dry biomass after 6 days fermentation with Saccharomyces cerevisiae.
