BioChem - DOS

Biobutanol production by Clostridium acetobutylicum using xylose recovered from birch Kraft black liquor

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

Kudahettige-Nilsson, R.L.; Helmerius, J.; Nilsson, R.T.; Sjoblom, M.; Hodge, D.B.; Rova, U.

Acetone-butanol-ethanol (ABE) fermentation was studied using acid-hydrolyzed xylan recovered from hardwood Kraft black liquor by CO<SUB>2</SUB> acidification as the only carbon source. Detoxification of hydrolyzate using activated carbon was conducted to evaluate the impact of inhibitor removal and fermentation. Xylose hydrolysis yields as high as 18.4% were demonstrated at the highest severity hydrolysis condition. Detoxification using active carbon was effective for removal of both phenolics (76-81%) and HMF (38-52%). Batch fermentation of the hydrolyzate and semi-defined P2 media resulted in a total solvent yield of 0.12-0.13g/g and 0.34g/g, corresponding to a butanol concentration of 1.8-2.1g/L and 7.3g/L respectively. This work is the first study of a process for the production of a biologically-derived biofuel from hemicelluloses solubilized during Kraft pulping and demonstrates the feasibility of utilizing xylan recovered directly from industrial Kraft pulping liquors as a feedstock for biological production of biofuels such as butanol.

2015

Elsevier Applied Science

0960-8524

176

pp.71-79

10.1016/j.biortech.2014.11.012

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART70956834

ABE fermentation; Birch wood Kraft black liquor; Lignin precipitation; Fermentation inhibitors; Detoxification