BioChem - DOS

Butyric acid from anaerobic fermentation of lignocellulosic biomass hydrolysates by Clostridium tyrobutyricum strain RPT-4213

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

Liu, S.; Bischoff, K.M.; Leathers, T.D.; Qureshi, N.; Rich, J.O.; Hughes, S.R.

A novel Clostridium tyrobutyricum strain RPT-4213 was found producing butyrate under strict anaerobic conditions. This strain produced 9.47gL<SUP>-1</SUP> butyric acid from MRS media (0.48g/g glucose). RPT-4213 was also used to ferment dilute acid pretreated hydrolysates including wheat straw (WSH), corn fiber (CFH), corn stover (CSH), rice hull (RHH), and switchgrass (SGH). Results indicated that 50% WSH with a Clostridia medium (Ct) produced the most butyric acid (8.06gL<SUP>-1</SUP>, 0.46g/g glucose), followed by 50% SGH with Ct (6.01gL<SUP>-1</SUP>, 0.44g/g glucose), however, 50% CSH Ct showed growth inhibition. RPT-4213 was then used in pH-controlled bioreactor fermentations using 60% WSH and SGH, with a dilute (0.5x) Ct medium, resulting 9.87gL<SUP>-1</SUP> butyric acid in WSH (yield 0.44g/g) and 7.05gL<SUP>-1</SUP> butyric acid in SGH (yield 0.42g/g). The titer and productivity could be improved through process engineering.

2013

Elsevier Applied Science

0960-8524

143

pp.322-329

10.1016/j.biortech.2013.06.015

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART66421682

Clostridium tyrobutyricum; Butyrate; Wheat straw; Corn stover; Corn fiber; Rice hull and switchgrass hydrolysates