Fermentation of hardwood hemicellulose hydrolysate byPachysolen tannophilus,candida shehatae andPichia stipitis |
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Authors: | Patrizia Perego Attilio Converti Emilio Palazzi Prof Marco Del Borghi Giuseppe Ferraiolo |
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Institution: | (1) Institute of Chemical Engineering Science and Technology, Genoa University, Via Opeta Pia 15, 16145 Genova, Italy |
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Abstract: | Summary Hardwood hemicellulose hydrolysate has been utilized as a substrate for ethanol production. Among the three different yeasts tested, the best performances have been obtained, in decreasing order, usingPachysolen tannophilus, Candida shehatae andPichia stipitis. Several pretreatments of this raw material have been studied to improve ethanol yields; in one such pretreatment a strain ofP. tannophilus produced ethanol with a yield of 0.29 gethanol/gsugars (gP/gS); which is only 15% less than the values observed with synthetic media. Neither aeration nor acetone addition improved the fermentation of this substrate; in fact, only a marked stimulation of biomass growth has been observed at the expense of both ethanol and xylitol production. |
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Keywords: | Lignocellulosic waste Yeast Ethanol production Optimization study |
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