BioChem - DOS

Fermentation of lignocellulosic hydrolyzate using a submerged membrane bioreactor at high dilution rates

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

Ylitervo, P.; Doyen, W.; Taherzadeh, M.J.

A submerged membrane bioreactor (sMBR) was developed to ferment toxic lignocellulosic hydrolyzate to ethanol. The sMBR achieved high cell density of Saccharomyces cerevisiae during continuous cultivation of the hydrolyzate by completely retaining all yeast cells inside the sMBR. The performance of the sMBR was evaluated based on the ethanol yield and productivity at the dilution rates 0.2, 0.4, 0.6, and 0.8h<SUP>-1</SUP> with the increase of dilution rate. Results show that the yeast in the sMBR was able to ferment the wood hydrolyzate even at high dilution rates, attaining a maximum volumetric ethanol productivity of 7.94+/-0.10gL<SUP>-1</SUP>h<SUP>-1</SUP> at a dilution rate of 0.8h<SUP>-1</SUP>. Ethanol yields were stable at 0.44+/-0.02gg<SUP>-1</SUP> during all the tested dilution rates, and the ethanol productivity increased from 2.16+/-0.15 to 7.94+/-0.10gL<SUP>-1</SUP>h<SUP>-1</SUP>. The developed sMBR systems running at high yeast density demonstrate a potential for a rapid and productive ethanol production from wood hydrolyzate.

2014

Elsevier Applied Science

0960-8524

164

pp.64-69

10.1016/j.biortech.2014.04.066

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART69315901

http://hb.diva-portal.org/smash/get/diva2:869933/FULLTEXT01

Wood hydrolyzate; Membrane bioreactor; Bioethanol production; Cell retention; IPC membrane panel