z-logo
Premium
Continuous ethanol production from sugarcane molasses using a newly designed combined bioreactor system by immobilized S accharomyces cerevisiae
Author(s) -
Xu Wanxia,
Liang Lei,
Song Zhentao,
Zhu Mingjun
Publication year - 2014
Publication title -
biotechnology and applied biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 70
eISSN - 1470-8744
pISSN - 0885-4513
DOI - 10.1002/bab.1175
Subject(s) - fermentation , bioreactor , chemistry , ethanol , ethanol fermentation , ethanol fuel , sugar , yeast , food science , dilution , polyvinyl alcohol , yield (engineering) , biochemistry , materials science , organic chemistry , physics , metallurgy , thermodynamics
Continuous ethanol fermentation using polyvinyl alcohol ( PVA ), immobilized yeast, and sugarcane molasses (22 and 35°Bx) with 8 g/L urea was run in a combined bioreactor system consisting of three‐stage tubular bioreactors in series. The effect of the dilution rate ( D ) at 0.0037, 0.0075, 0.0117, 0.0145, 0.018 , and 0.0282 H −1 on continuous ethanol fermentation was investigated in this study. The results showed that D had a significant effect on fermentation efficiency, sugar‐utilized rate, ethanol yield, and ethanol productivity in this designed continuous fermentation system. The D had a linear relationship with residual sugar and ethanol production under certain conditions. The highest fermentation efficiency of 83.26%, ethanol yield of 0.44 g/g, and the lowest residual sugar content of 6.50 g/L were achieved at 0.0037 H −1 in the fermentation of 22°Bx molasses, indicating that the immobilization of cells using PVA , sugarcane pieces, and cotton towel is feasible and the established continuous system performs well.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here