Efficient Process Development for Cellulosic Ethanol Fermentation from Cassava Pulp

Abstract

Abstract-Ethanol has gain an increasing popularity to be used as biofuels. Various renewable agricultural feed stocks can be used for the fermentation process especially lignocellulosic materials. Pre-treatment of these materials for lignin removal is essential in order to obtain cellulose and hemi-cellulose. In this work, saccharification of cellulosic cassava pulp employed 2 steps of alkaline pretreatment, and enzymatic conversion. Experimental results showed that the reducing sugar was obtained at about 714 mg/g substrate . S. cerevisiae, and P. stipitis showed its ability to ferment glucose and xylose, an abundant C 5 monosaccharide in lignocellulose materials. The produced fermentable sugars can be further converted to ethanol to 40.50 g/L. The process development of this particular system still required further pilot scale tests as well as process simulation. These results could pave a way for the application in an industrial scale cellulosic ethanol production.

Bio-oil synthesis from cassava pulp via hydrothermal liquefaction: Effects of catalysts and operating conditions

“…It also contains small amounts of fiber, protein, and cyanide (Pandey et al 2000). Typically, raw CP has a moisture content of approximately 80% (Charmongkolpradit and Luampon 2017) and contains 32.57% cellulose, 11.64% hemicellulose, 4.35% lignin, and 2.88% ash (Samnuknit, Boontawan, and Boontawan 2017). In Thailand, CP is considered as a waste byproduct from the starch industry and is widely used as animal feed (Srisaikham, Isobe, and Suksombat 2018) and biogas feedstock (Panichnumsin et al 2006).…”