Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

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Nowak J. 2001. COMPARISON OF POLISH INDUSTRIAL DISTILLERY YEAST WITH ETHANOL PRODUCING BACTERIA ZYMOMONAS MOBILIS, EJPAU 4(2), #06.
Available Online: http://www.ejpau.media.pl/volume4/issue2/food/abs-06.html

ABSTRACT

Comparison between ethanol producing bacteria Zymomonas mobilis (strain CCM 3881 and CCM 3883) and commercial yeast (D₂, Bc-16a) was made using glucose medium. While the differences between bacteria and yeasts in low glucose medium (85.5 g/dcm³) were not of statistical importance, ethanol yield and sugars utilization were higher for Z. mobilis on medium with high concentration of glucose (150-250 g/dcm³). The bacteria growth was less inhibited by alcohol in the medium than yeasts. The bacteria biomass needed for 1 dcm³ ethanol production was from 2 times (glucose medium 85.5 g/dcm³) to 3-4 times (241 g glucose in 1 dcm³ medium) less than yeasts.

Key words: yeast, Zymomonas mobilis, ethanol yield, ethanol productivity, continuous fermentation.

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