Ethanol production by modified polyvinyl alcohol-immobilized Zymomonas mobilis and in situ membrane distillation under very high gravity condition

[Display omitted] •Very high gravity process is tested with immobilized Zymomonas mobilis cells.•Vacuum membrane distillation in-situ removes fermented products.•The integrated system yields higher yield and productivity of ethanol than literature. Concentration of ethanol from the fermentation brot...

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Bibliographic Details
Published in:Applied energy 2017-09, Vol.202, p.1-5
Main Authors: Zhang, Quanguo, Nurhayati, Cheng, Chieh-Lun, Lo, Yung-Chung, Nagarajan, Dillirani, Hu, Jianjun, Chang, Jo-Shu, Lee, Duu-Jong
Format: Article
Language:English
Subjects:
Bioethanol
Membrane distillation
Productivity
Very high gravity fermentation
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Summary:[Display omitted] •Very high gravity process is tested with immobilized Zymomonas mobilis cells.•Vacuum membrane distillation in-situ removes fermented products.•The integrated system yields higher yield and productivity of ethanol than literature. Concentration of ethanol from the fermentation broth is an energy-intensive process. Very high gravity (VHG) process with modified polyvinyl alcohol-immobilized Zymomonas mobilis cells integrated with in situ bioethanol removal via vacuum membrane distillation (VMD) was proposed to mitigate product inhibition effects in VHG fermentation. The proposed VHG+VMD system, at 300g/L glucose loading, produced 127.4g/L (16.1%v/v) ethanol, at 63.7g/L−h productivity and 84.9% glucose conversion rate, which is the highest in reported literature.
ISSN:0306-2619
1872-9118
DOI:10.1016/j.apenergy.2017.05.105