Organic biomass is an attractive feedstock for second generation alcohol production. Wild-type strains of the genus Candida showed capabilities different to produce alcohol fermenting a carbohydrates mixture （synthet...Organic biomass is an attractive feedstock for second generation alcohol production. Wild-type strains of the genus Candida showed capabilities different to produce alcohol fermenting a carbohydrates mixture （synthetic medium）, individually and in co-culture. Therefore, the main objective of this work was to evaluate the capability of Candida wild-type strains isolated from termite gut and rumen liquid, to ferment the most commonly carbohydrates presented in citrus residues, individually and in co-culture to alcohol production. C Tropicalis （LR4） presented higher percentage of carbohydrate consumption （74.20% ± 4.60%）, alcohol production （44.53 ± 0.01 gLl） and maximal alcohol productivity （6.40 ± 0.01 gL-l day） than C Glabrata （T1）. Co-culture schemas, CC1 （LR4： 60%; TI： 40%） and CC3 （first LR4 alone and 2 days later T1） presented the highest alcohol production （45.20 ± 1.30 gL-1 and 46.80 ± 2.60 gL-1, respectively）. Maximal alcohol productivity was obtained with CC2 （LR4： 80%; TI： 20%） and CC3 schemas, 7.70 ± 0.29 gL-1 day and 7.80 ± 0.44 gL-l day, respectively. The results suggest the usefulness of these wild-type strains in co-culture as an alternative to alcohol production from carbohydrates mixtures at concentrations commonly found in citrus waste.展开更多
文摘Organic biomass is an attractive feedstock for second generation alcohol production. Wild-type strains of the genus Candida showed capabilities different to produce alcohol fermenting a carbohydrates mixture （synthetic medium）, individually and in co-culture. Therefore, the main objective of this work was to evaluate the capability of Candida wild-type strains isolated from termite gut and rumen liquid, to ferment the most commonly carbohydrates presented in citrus residues, individually and in co-culture to alcohol production. C Tropicalis （LR4） presented higher percentage of carbohydrate consumption （74.20% ± 4.60%）, alcohol production （44.53 ± 0.01 gLl） and maximal alcohol productivity （6.40 ± 0.01 gL-l day） than C Glabrata （T1）. Co-culture schemas, CC1 （LR4： 60%; TI： 40%） and CC3 （first LR4 alone and 2 days later T1） presented the highest alcohol production （45.20 ± 1.30 gL-1 and 46.80 ± 2.60 gL-1, respectively）. Maximal alcohol productivity was obtained with CC2 （LR4： 80%; TI： 20%） and CC3 schemas, 7.70 ± 0.29 gL-1 day and 7.80 ± 0.44 gL-l day, respectively. The results suggest the usefulness of these wild-type strains in co-culture as an alternative to alcohol production from carbohydrates mixtures at concentrations commonly found in citrus waste.
