A review on current technological advancement of lignocellulosic bioethanol production

Bioethanol production from lignocellulosic biomass has several advantages. Lignocellulosic bioethanol production process consists of three steps including; pre treatment, enzymatic hydrolysis and fermentation. But there are several technological challenges of each step for commercial bioethanol production. The ideal pre treatment characterized by reduced cellulose crystallinity, significant lignin reduction and less inhibitory compound generation. The enzymatic hydrolysis process depends on cheaper cellulose production and higher reducing sugar yield within shorter incubation time. Fermentation process depends on isolation/development of yeast strain which can ferment both pentose hexose sugars. The present review deals with recent technological advancement of each step of lignocellulosic bioethanol production. The current review mainly focused on fermentation step, genetic engineering of yeast and thermotolerant yeast for ethanol production. The current literature can be useful for further technological advancement of lignocellulosic bioethanol production.