ALCOHOL FERMENTATION USING LIGNIN-RELATED COMPOUNDS AS A CARBON SOURCE

Clostridium indolis JCM 1380 produced 0.24 g/l of ethanol from protocatechuic acid with consumption of about 40% of the substrate (1.2 g/l) at 96 h of cultivation, while Clostridium sphenoides JCM 1415 produced 0.37 g/l of ethanol from p-hydroxybenzoic acid with consumption of about 30% of the substrate (1.5 g/l) at 60 h of cultivation. However, a long lag time was necessary to produce ehtanol from protocatechuic acid by C. indolis, whereas ethanol from p-hydroxybenzoic acid by C. sphenoides was produced without a lag time.