BioChem - DOS

Ensilage and Bioconversion of Grape Pomace into Fuel Ethanol

Journal of agricultural and food chemistry

Zheng, Yi; Lee, Christopher; Yu, Chaowei; Cheng, Yu-Shen; Simmons, Christopher W.; Zhang, Ruihong; Jenkins, Bryan M.; VanderGheynst, Jean S.

<P>Two types of grape pomace were ensiled with eight strains of lactic acid bacteria (LAB). Both fresh grape pomace (FrGP) and fermented grape pomace (FeGP) were preserved through alcoholic fermentation but not malolactic conversion. Water leaching prior to storage was used to reduce water-soluble carbohydrates and ethanol from FrGP and FeGP, respectively, to increase malolactic conversion. Leached FeGP had spoilage after 28 days of ensilage, whereas FrGP was preserved. Dilute acid pretreatment was examined for increasing the conversion of pomace to ethanol via Escherichia coli KO11 fermentation. Dilute acid pretreatment doubled the ethanol yield from FeGP, but it did not improve the ethanol yield from FrGP. The ethanol yields from raw pomace were nearly double the yields from the ensiled pomace. For this reason, the recovery of ethanol produced during winemaking from FeGP and ethanol produced during storage of FrGP is critical for the economical conversion of grape pomace to biofuel.</P><P><B>Graphic Abstract</B><BR><IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jafcau/2012/jafcau.2012.60.issue-44/jf303509v/production/images/medium/jf-2012-03509v_0003.gif'></P>

2012

American Chemical Society

0021-8561

1520-5118

60

44

pp.11128-11134

10.1021/jf303509v

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART64922400

bioethanol; dilute acid pretreatment; ensilage; grape pomace