BioChem - DOS

Pretreatment of forest residues of Douglas fir by wet explosion for enhanced enzymatic saccharification

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Biswas, R.; Teller, P.J.; Ahring, B.K.

The logging and lumbering industry in the Pacific Northwest region generates huge amount of forest residues, offering an inexpensive raw material for biorefineries. Wet explosion (WEx) pretreatment was applied to the recalcitrant biomass to optimize process conditions including temperature (170-190<SUP>o</SUP>C), time (10-30min), and oxygen loading (0.5-7.5% of DM) through an experimental design. Optimal pH for enzymatic hydrolysis of the optimized samples and a complete mass balance have been evaluated. Results indicated that cellulose digestibility improved in all conditions tested with maximum digestibility achieved at 190<SUP>o</SUP>C, time 30min, and oxygen loading of 7.5%. Glucose yield at optimal pH of 5.5 was 63.3% with an excellent recovery of cellulose and lignin of 99.9% and 96.3%, respectively. Hemicellulose sugars recovery for xylose and mannose was found to be 69.2% and 76.0%, respectively, indicating that WEx is capable of producing relative high sugar yield even from the recalcitrant forest residues.

2015

Elsevier Applied Science

0960-8524

192

pp.46-53

10.1016/j.biortech.2015.05.043

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART72336354

Pretreatment; Enzymatic hydrolysis; Biochemical conversion; Mass balance; Biorefineries