Ethanol production by modified polyvinyl alcohol-immobilized Zymomonas mobilis and in situ membrane distillation under very high gravity condition. (15th September 2017)

• Record Type: Journal Article
• Authors: Zhang, Quanguo; Nurhayati, ; Cheng, Chieh-Lun; Lo, Yung-Chung; Nagarajan, Dillirani; Hu, Jianjun; Chang, Jo-Shu; Lee, Duu-Jong
• Is Part Of: Applied energy. Volume 202(2017)
• Page Start: 1
• Page End: 5
• Publication Date: 2017-09-15
• Subjects: Bioethanol -- Very high gravity fermentation -- Membrane distillation -- Productivity; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2017.05.105
• Languages: English
• ISSNs: 0306-2619

Abstract

Graphical abstract: Highlights: 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. Abstract: 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 300 g/L glucose loading, produced 127.4 g/L (16.1% v/v) ethanol, at 63.7 g/L−h productivity and 84.9% glucose conversion rate, which is the highest in reported literature.