BioChem - DOS

Production of mixed acids from non-pretreated red algae Gelidium amansii

Renewable energy

Lee, Sung-Mok; Choi, Min-Ho; Hong, Won-Kyung; Park, Jang Min; Yu, Anna; Lee, Jung-Suck; Seo, Jeong-Woo; Kim, Chul Ho

<P><B>Abstract</B></P> <P>The present study investigates the production of mixed acids by anaerobic fermentation using non-pretreated red algae <I>Gelidium amansii</I> as a substrate. The production levels of mixed acids were increased 1.6-fold in enrichment cultures of anaerobic digester sludge and tidal field soil compared with fresh sludge. The enrichment culture was composed of four major groups of microbial strains belonging to <I>Clostridium</I> sp. and <I>Enterococcus</I> sp. A defined mixed culture established based on the identified isolates increased mixed acids production level by up to 50.9% (g/g). Semi-continuous fermentation with a biomass-loading rate of 2.77？g/L/d and hydraulic retention time of 30 days yielded a productivity of 1.41？g/L/d. This is the first report of the production of mixed acids from the red algae <I>G.？amansii</I>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel production of mixed acids by anaerobic fermentation using non-pretreated red algae <I>Gelidium amansii</I> as a substrate. </LI> <LI> Use of a defined mixed culture of 4 major groups of microbial strains. </LI> <LI> Mixed strains belonging to <I>Clostridium</I> sp. and <I>Enterococcus</I> sp. increased the mixed acid production. </LI> </UL> </P>

2014

Elsevier

0960-1481

63

pp.366-369

10.1016/j.renene.2013.09.050

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART67521938

Red algae; Enrichment culture; Mixed acids; Fermentation