Ethanol production from potato peel waste (PPW) |
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Authors: | D. Arapoglou Th. Varzakas A. Vlyssides C. Israilides |
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Affiliation: | 1. Ecole Nationale d''Ingénieurs de Sfax, Laboratoire d''amélioration des plantes et valorisation des agro-ressources, BP 1173, 3038 Sfax, Tunisia;2. Ecole Nationale d''Ingénieurs de Sfax, Unité enzymes et Bioconversion, BP 1173, 3038 Sfax, Tunisia;3. Service de Chromatographie, Purification et analyse de polysaccharides CERMAV-CNRS, 601 rue de la Chimie, 38041 Grenoble cedex 9, France;4. Institut Préparatoire aux Etudes d''Ingénieurs de Sfax, Département de Biologie et Géologie, BP 1172, 3018 Sfax, Tunisia;5. Institue de l''olivier, Laboratoire d''amélioration de la productivité de l''olivier et la qualité du produit, Tunisia;6. Université de Sfax, ENIS, Unité de Service Bioréacteur couplé à un ultrafiltre, Route de Soukra km 4, BP1173, 3038 Sfax, Tunisia |
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Abstract: | Considerable concern is caused by the problem of potato peel waste (PPW) to potato industries in Europe. An integrated, environmentally-friendly solution is yet to be found and is currently undergoing investigation. Potato peel is a zero value waste produced by potato processing plants. However, bio-ethanol produced from potato wastes has a large potential market. If Federal Government regulations are adopted in light of the Kyoto agreement, the mandatory blending of bio-ethanol with traditional gasoline in amounts up to 10% will result in a demand for large quantities of bio-ethanol. PPW contain sufficient quantities of starch, cellulose, hemicellulose and fermentable sugars to warrant use as an ethanol feedstock. In the present study, a number of batches of PPW were hydrolyzed with various enzymes and/or acid, and fermented by Saccharomyces cerevisae var. bayanus to determine fermentability and ethanol production. Enzymatic hydrolysis with a combination of three enzymes, released 18.5 g L?1 reducing sugar and produced 7.6 g L?1 of ethanol after fermentation. The results demonstrate that PPW, a by-product of the potato industry features a high potential for ethanol production. |
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