A. Wieczorek et H. Michalski, CONTINUOUS ETHANOL-PRODUCTION BY FLOCCULATING YEAST IN THE FLUIDIZED-BED BIOREACTOR, FEMS microbiology reviews, 14(1), 1994, pp. 69-74
Continuous fermentation by a highly flocculant strain of the yeast Sac
charomyces cerevisiae was carried out in a tower fluidized-bed bioreac
tor. The synthetic and molasses media with a total sugar concentration
of 17% (w/v) were used for fermentation. Different dilution rates wer
e tested. Stable cell densities of 50 kg m(-3) (dry weight) were maint
ained for all dilution rates. The ethanol productivity was increasing
linearly with dilution rates up to 15-20 kg m(-3) h(-1). Aeration of t
he culture stabilized flocculating activity and viability of yeast and
also permitted long-term operation of the bioreactor.