Biotechnological production of L(+)-lactic acid from wood hydrolyzate by batch fermentation of Enterococcus faecalis.
The inhibition of lactic acid fermentation by wood hydrolyzate was decreased (approx. 20%) by adaptation of Enterococcus faecalis RKY1 to wood hydrolyzate-based medium whereby lactic acid productivity and cell growth were enhanced by 0.5 g l(-1) h(-1) and 2.1 g l(-1), respectively. When the diluted or concentrated wood hydrolyzate (equivalent to 25-100 g glucose l(-1)) was supplemented with 15 g yeast extract l(-1), 24-93 g lactic acid l(-1) was produced at a rate between 1.7 g l(-1) h(-1) and 3.2 g l(-1) h(-1).
Faculty of Applied Chemical Engineering, Institute of Bioindustrial Technology, Chonnam National University, Gwangju 500-757, Korea.
Young-Jung
YJ
Wee
Jong-Sun
JS
Yun
Don-Hee
DH
Park
Hwa-Won
HW
Ryu
D000222:Adaptation, Physiological / Q000502:physiology; D019149:Bioreactors / Q000382:microbiology*; D001709:Biotechnology / Q000379:methods*; D018929:Cell Culture Techniques / Q000379:methods*; D002455:Cell Division / Q000502:physiology; D013293:Enterococcus faecalis / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism*; D005285:Fermentation / Q000502:physiology; D006868:Hydrolysis; D019344:Lactic Acid / Q000096:biosynthesis*; D014934:Wood
D019344:Lactic Acid