title: High productivity bioethanol fermentation by immobilized Saccharomyces bayanus onto carboxymethylcellulose-g- poly(N-vinyl-2-pyrrolidone) beads.
abstract: Crosslinked graft copolymers of CMC with N-vinyl-2-pyrrolidone (N-VP) were prepared in different grafting yields. Saccharomyces bayanus was immobilized in the graft copolymers of carboxymethylcellulose-g-poly(N-vinyl-2-pyrrolidone) (CMC-g-PVP) for ethanol fermentation. The effects of grafting yield, initial glucose concentration, and crosslinker concentration on the yield of ethanol process was investigated. Ethanol production increased when percentage of N-vinyl-2-pyrrolidone in the graft copolymer was increased. The maximum concentration, productivity, and yield of ethanol were 98.78 g L (-1), 8.23 g L (-1) h (-1) and 0.494 g g (-1), respectively. Reusability of the immobilized yeasts was found that the materials can be used seven times without losing their activity.
authors.affiliation: Department of Chemistry, Faculty of Sciences and Arts, Kirikkale University, 71450 Yahşihan, Kirikkale, Turkey. mgokgoz@kku.edu.tr
authors.forename: Murat
authors.initials: M
authors.lastname: Gökgöz
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yiğitoğlu
mesh_terms: D019149:Bioreactors; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry; D018914:Cells, Immobilized / Q000378:metabolism; D017743:Equipment Reuse; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D058105:Polymerization; D011205:Povidone / Q000737:chemistry; D012440:Saccharomyces / Q000378:metabolism*
chemical_list: D000431:Ethanol; D011205:Povidone; D005947:Glucose; D002266:Carboxymethylcellulose Sodium