Industrial waste corncob residues (CCR) are rich in cellulose and can be hydrolyzed directly without pretreatment. However, a poor fermentation performance was frequently observed in the simultaneous saccharification and ethanol fermentation (SSF) of CCR, although the furans and organic acid inhibitors were
very low. In this study, the high level of water-insoluble phenolic compounds such as 2-furoic acid, ferulic
acid,p-coumaric acid, guaiacol, and p-hydroxybenzoic acid were detected in CCR and inhibited the
growth and metabolism ofSaccharomyces cerevisiaeDQ1. An evolutionary adaptation strategy was developed by culturing theS. cerevisiaeDQ1 strain in a series of media with the gradual increase of CCR hydrolysate. The high ethanol concentration (62.68 g/L) and the yield (55.7%) were achieved in the SSF of CCR
using the adaptedS. cerevisiaeDQ1. The results provided a practical method for improving performance
of simultaneous saccharification and ethanol production from CCR.
Industrial waste corncob residues (CCR) are rich in cellulose and can be hydrolyzed directly without pretreatment. However, a poor fermentation performance was frequently observed in the simultaneous saccharification and ethanol fermentation (SSF) of CCR, although the furans and organic acid inhibitors werevery low. In this study, the high level of water-insoluble phenolic compounds such as 2-furoic acid, ferulicacid,p-coumaric acid, guaiacol, and p-hydroxybenzoic acid were detected in CCR and inhibited thegrowth and metabolism ofSaccharomyces cerevisiaeDQ1. An evolutionary adaptation strategy was developed by culturing theS. cerevisiaeDQ1 strain in a series of media with the gradual increase of CCR hydrolysate. The high ethanol concentration (62.68 g/L) and the yield (55.7%) were achieved in the SSF of CCRusing the adaptedS. cerevisiaeDQ1. The results provided a practical method for improving performanceof simultaneous saccharification and ethanol production from CCR.
การแปล กรุณารอสักครู่..
