초록
<P><B>Abstract</B></P> <P>Fermentation of sugar for production of ethanol was carried out using <I>Saccharomyces cerevisiae</I> cells immobilized in calcium alginate films. Thin films of calcium alginate casted on a microchannel surface were used instead of the typical spherical bead configuration. Yeast immobilized on alginate films produced a higher ethanol yield than free yeast cells under the same fermentation conditions. Also, a silicalite-1/poly dimethyl siloxane composite pervaporation membrane was synthesized for ethanol separation, and characterized with flux and separation factor. The composite membrane synthesized with a 3–1 ratio of silicalite-1 to poly dimethyl siloxane showed promising results, with a flux of 140.6g/m<SUP>2</SUP> h±19.3 and a separation factor of 37.52±3.55. Thus, the performance of both the alginate film with immobilized cells and the customized hybrid membrane suggests they could have an interesting potential application in an integrated reaction-separation device for the production and purification of bioethanol.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Yeast cells were immobilized in calcium alginate film casted on a microchannel. </LI> <LI> Immobilized cells produced a higher bioethanol yield than free yeast cells. </LI> <LI> Silicalite-1/PDMS pervaporation membrane was synthesized for ethanol separation. </LI> <LI> The effect of silicalite-1/PDMS ratio on flux and separation factor was characterized. </LI> <LI> Results suggest interesting applications on integrated reaction-separation device. </LI> </UL> </P>