Khadiga I. M. El-Gabry, Ahmed M. Eldin and Sanaa S. H. Sarabana( 2016). Optimizing Growth Conditions Provoked Ethanol Production by Fungi Grown on FructoseMiddle East Journal of Applied Sciences (2016) volume 6 (3): 479-489
Abstract: Nine fungal strains known for their cellulolytic activities including: Aspergillus oryzae, Aspergillus versicolor-I, Aspergillus versicolor-II, Fusarium oxysporum, Fusarium oxysporum-I, Mucor indicus, Penicillium citrinum, Phanerochaete chrysosporium and Pleurotus sp., were tested for their fermentation capabilities on Mandels medium supplied with 10% fructose as sole carbon source at 35°C under minor air conditions. Among the nine strains F. oxysporum recorded the best ethanol production to be 0.077g ethanol / g carbon. Mandels medium components were further modified individually for best ethanol production. Throughout nutritional development the ethanol yield efficiency increased from 15 up to 44%, using yeast extract as sole nitrogen source at C:N ratio of 2:1 and initial pH=5. Fructose was tested at concentrations of 5%, 10%, and 15%, altered ratio between fructose consumed in ethanol production and that in fungal growth to be 2.2:1, 1.1:1 and 1:1.8, respectively, of which 5% fructose was considered the best in spite of 10% fructose that gave fermentation yield efficiency of 44.9%.
Keywords: (Growth Conditions Ethanol Fungi Fructose)
