Ethanol production byZymomonas mobilisCP4 from sugar cane chips

✍ Scribed by Z. P. Shalita; M. D. White; M. Katz; M. Zur; A. Mizrahi

• Publisher: Springer Netherlands
• Year: 1981
• Tongue: English
• Weight: 274 KB
• Volume: 3
• Category: Article
• ISSN: 0141-5492
• DOI: 10.1007/bf00134852

✦ Synopsis

The fermentation of large sugar cane chips (l.O-l.5 in) to ethanol by Zymomonas mobilis CP4 (Z. mobilis) was studied in two glass fermentors operating with ~circulation for agitation (the EX-FERM type): a. A laboratory scaleC2.5 liter) cylindrical vessel; b. A bench scale (8 liter) wide vessel. Z. mobilis cultures consumed 89-96% of the cane sucrose, converting it to ethanoT-by 90-97% of the theoretical yield in the laboratory scale fermentor and by 83-90% in the bench scale fermentor culture. Comparative Saccharomyces spp. cultures in laboratory fermentor consumed 96-98% of the cane sucrose, with ethanol conversion of only 75-79% of the theoretical yield.

These preliminary results indicated that sucrose in agricultural size sugar cane chips was ethanol fermentable as compared to small size sugar cane chips or to sugar cane juice. Z. mobilis CP4 cultures converted sucrose more efficiently to ethanol than ~acc a-Ba-r-6myces spp. as shown in the laboratory scale fermentor studies.

The ethanol yields in a wide bench scale fermentor cultures were slightly lower than in a laboratory fermentor.