Improvement of Bioethanol Productivity of Immobilized Saccharomyces Bayanus with Using Sodium Alginate-Graft-Poly(N-Vinyl-2-Pyrrolidone) Matrix
2012
İnal, Murat | YiÄitoÄlu, Mustafa
In this study, immobilization conditions and bioethanol production characteristics of immobilized Saccharomyces bayanus were investigated into sodium alginate-graft-poly(N-vinyl-2-pyrrolidone; NaAlg-g-PVP) matrix. The matrix that crosslinked with calcium clorid was used for immobilization of S. bayanus. Bioethanol productivity of the NaAlg-g-PVP matrix was found to increase from 4.21 to 4.84Â gL−1Â h−1 when compared with the convential sodium alginate matrix. The production of bioethanol was affected by initial glucose concentration and percentage of immobilized cell beads in fermentation medium. Bioethanol productivity was increased from 3.62 to 4.84Â gL−1Â h−1 while the glucose concentration increasing from 50 to 100Â gL−1. Due to the increase in percentage from 10 to 20Â % of immobilized cell beads in the fermentation medium, bioethanol productivity was increased from 4.84 to 8.68Â gL−1Â h−1. The cell immobilized NaAlg-g-PVP beads were protected 92Â % of initial activity after six repeated fermentation.
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