BioChem - DOS

Removal of enzymatic and fermentation inhibitory compounds from biomass slurries for enhanced biorefinery process efficiencies

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

Gurram, R.N.; Datta, S.; Lin, Y.J.; Snyder, S.W.; Menkhaus, T.J.

Within the biorefinery paradigm, many non-monomeric sugar compounds have been shown to be inhibitory to enzymes and microbial organisms that are used for hydrolysis and fermentation. Here, two novel separation technologies, polyelectrolyte polymer adsorption and resin-wafer electrodeionization (RW-EDI), have been evaluated to detoxify a dilute acid pretreated biomass slurry. Results showed that detoxification of a dilute acid pretreated ponderosa pine slurry by sequential polyelectrolyte and RW-EDI treatments was very promising, with significant removal of acetic acid, 5-hydroxymethyl furfural, and furfural (up to 77%, 60%, and 74% removed, respectively) along with >97% removal of sulfuric acid. Removal of these compounds increased the cellulose conversion to 94% and elevated the hydrolysis rate to 0.69g glucose/L/h. When using Saccharomyces cerevisiae D<SUB>5</SUB>A for fermentation of detoxified slurry, the process achieved 99% of the maximum theoretical ethanol yield and an ethanol production rate nearly five-times faster than untreated slurry.

2011

Elsevier Applied Science

0960-8524

102

17

pp.7850-7859

10.1016/j.biortech.2011.05.043

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART57035475

Lignocelluosic biomass; Electrodeionization; Polyelectrolytes; Detoxification; Biorenewables