The feasibility of yeast immobilization on cotton fiber for ethanol production was evaluated. Firstly, the surface groups of cotton fibers were chemically modified to improve adhesion ability. Secondly, the stability of immobilized cell fermentation was analyzed, and quantitative differences between immobilized and free cell fermentation were analyzed. The results showed that the adhesion ability of the carriers (the adhesion ration: 83.1%) which were treated with F6-2 increased by 15.9%, comparing with that of the carriers without treatment. Furthermore, the immobilized cell fermentation with the treated carriers demonstrated better stability. Compared with the free cell fermentation, the average conversion rate (96.77%) and yield [5.22 g/(L·h)] of the six batches enhanced by 3% and 51.7% respectively. After six batches of the immobilized cell fermentation, the total number of yeast was 4.86×108 CFU/mL, which was twice of the free cell fermentation. The results showed that immobilized cell fermentation with the modified cotton fiber had obvious advantages and feasibility.
DENG Yanhong
,
LIU Qingguo
,
WANG Hu
,
YING Hanjie
,
CHEN Yong
,
LI Yi
. Ethanol production by immobilized yeast on cotton fiber[J]. Food and Fermentation Industries, 2022
, 48(4)
: 213
-217
.
DOI: 10.13995/j.cnki.11-1802/ts.027871
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