An approach to optimization of enzymatic hydrolysis from sugarcane bagasse based on organosolv pretreatment

Abstract

BACKGROUND: The organosolv pretreatment followed by enzymatic hydrolysis of the pretreated material and subsequent fermentation of the hydrolysate produced, was the strategy used for ethanol production from sugarcane bagasse. The effect of different operational variables affecting the pretreatment (the catalyst type and its concentration, and the pretreatment time) and enzymatic hydrolysis stage (substrate concentration, cellulase loading, addition of xylanase and Tween 20, and the cellulase/β-glucosidase ratio), were investigated.

Isolation, identification and characterization of yeast species from coffee waste collected from Sidama and Gedio zone

“…Cellulose and hemicelluloses are sugar rich fractions of interest for use in fermentation processes, since microorganisms may use the sugars for growth and production of value added compounds such as ethanol, food additives, organic acids, enzymes, and others besides biofuels, several organic acids, including lactic, citric, acetic, and succinic acids, may be produced by cellulose conversion. The conversion of cellulose and hemicelluloses to hexose and pentose sugar like glucose, xylose, arabinose, mannose, may be subsequently converted to several products of interest such as ethanol (Mesa et al, 2010), butanol (Qureshi and Ezeji, 2008), hydrogen (Pan et al, 2010), organic acids (Mussatto et al, 2006), and hydroxyl methylfurfural.Xylose can also be used for the production of ethanol (Silva et al, 2010) as well as mannose and other hexose sugars (Jorgensen et al, 2010). In this study R. hylophila, R. aurantiaca A Hanseiasporavalbyensis and H. burtonii, can assimilate and ferment hexose and pentose sugar this will be a good ethanol producer from coffee pulp waste or other carbon source.…”

Economic Analysis of an Organosolv Process for Bioethanol Production

“…Although organosolv pretreatment has been demonstrated to be suitable for a wide range of feedstocks (see Pan et al 2005 for softwood, Pan et al 2006 for hardwood, andMesa et al 2010 for sugarcane bagasse), the economic analysis is also carried out assuming the same feedstock. For bioenergy and biofuel production, various poplar prices have been reported in the literature.…”

Alkali Pretreatment of Wheat Straw (Triticum aestivum) at Boiling Temperature for Producing a Bioethanol Precursor

“…10) Acidic, alkaline, and organic solvents are employed to digest the hemicelluloses or lignin via chemical treatments. [11][12][13] Steam explosion has been applied by a number of researchers to pretreat lignocellulosic biomasses. 14) Lignin-degrading microorganisms are used as a biological pretreatment to reduce the lignin content and enhance the digestibility of cellulose.…”