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Title: Robust cellulosic ethanol production from SPORL-pretreated lodgepole pine using an adapted strain Saccharomyces cerevisiae without detoxification

Source: Bioresource Technology, 101 (2010) 8678-8685. doi:10.1016/j.biortech.2010.06.069; 2010

Author(s)Tian, S.; Luo, X.L.; Yang, X.S.; Zhu, J.Y.

Publication Year: 2010  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4709-1A

Abstract: This study reports an ethanol yield of 270 L/ton wood from lodgepole pine pretreated with sulfite pretreatment to overcome recalcitrance of lignocellulose (SPORL) using an adapted strain, Saccharomyces cerevisiae Y5, without detoxification. The enzymatic hydrolysate produced from pretreated cellulosic solids substrate was combined with pretreatment hydrolysate before fermentation. Detoxification of the pretreatment hydrolysate using overliming or XAD-4 resin before being combined with enzymatic hydrolysate improved ethanol productivity in the first 4 h of fermentation and overall fermentation efficiency. However, detoxification did not improve final ethanol yield because of sugar losses. The Y5 strain showed excellent ethanol productivities of 2.0 and 0.8 g/L/h averaged over a period of 4 and 24 h, respectively, in the undetoxified run. The furan metabolization rates of the Y5 strain were significantly higher for the undetoxified run than those for the detoxidfied runs, suggesting it can tolerate even higher furan concentrations than those studied. Preliminary mass and energy balances were conducted. SPORL produced an excellent monomeric sugar recovery value of about 85% theoretical and a net energy output of 4.05 GJ/ton wood with an ethanol energy production efficiency of 178% before distillation.

Keywords: Ethanol, alcohol, fuelwood, biomass energy, biomass utilization, biotechnology, hemicellulose, energy consumption, pretreatment, sugars, lignocellulose, biodegradation, cellulose, fermentation, lodgepole pine, yeast fungi, fungi, industrial applications, wood-decaying fungi, Saccharomyces cereviseae, enzymes, SPORL, biomass fuel, bioconversion, biorefining, wood extractives, chemical utilization, saccharification, hydrolysates, sulfite liquors, furan, biofuels, cellulosic ethanol, woody forest biomass, detoxification

Publication Review Process: Formally Refereed

File size: 1,110 kb(s)

Date posted: 08/23/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 36609
Current FPL Scientist associated with this product
Zhu, JunYong
Research General Engineer

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