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Ethanol production in membrane bioreactor

100%

Gryta M. , Morawski A. W.

1998

nr 3

147-157

A membrane bioreactor for alcohol fermentation is presented in this paper. Membrane distillation process was used for the removal of ethanol. The ethanol fluxes through the polypropylene membrane were approximately 2-3.5 kg EtOH/m2d. The yield of ethanol equals 0.45-0.51 g EtOH/g sugar was obtained.

Genetic modification of microorganisms for ethanol production from hemicellulosic hydrolyzates

100%

Nowak J.

1998

nr 3

89-97

The efficient and complete conversion of lignocellulosic hydrolysates to ethanol as a result of fermentation processes makes possible the production of a bio-fuel competitive with petroleum. Traditional organisms used in ethanol fermentation, e.g. Saccharomyces cerevisise and Zymomonas mobilis, are unable to ferment pentose sugars. To overcome this problem genetic modifications of S. cerevisiae, Z. mobilis and E. coli were performed in order to produce ethanol directly from xylose and arabinose. The performance of the recombinant strains is encouraging: especially over the last 3 years the progress has been rapid. There is a possibility that strains of these three species may find a separate application in the fermentation of specific plant biomasses.

Investigation of influence of solid substrate mixing on growth mycelium Pleurotus ostreatus

88%

Kopinski L.

nr 4

143-150

The influence of mixing cut straw on the growth of Pleurotus ostreatus in a rotating drum bioreactor was investigated. Higher concentration of mycelium was determined for low rotation (0,07-0,1 rph) than without rotation of bioreactor. Decrease in concentration of mycelium was observed for increasing rotations and the growth was stopped at 4,8 rph.