| Autor: |
Jamai L; Biotechnology Units, SMBA University, P.O. Box 1796 Atlas, Fez, Morocco., Ettayebi K, El Yamani J, Ettayebi M |
| Jazyk: |
angličtina |
| Zdroj: |
Bioresource technology [Bioresour Technol] 2007 Oct; Vol. 98 (14), pp. 2765-70. Date of Electronic Publication: 2006 Nov 28. |
| DOI: |
10.1016/j.biortech.2006.09.057 |
| Abstrakt: |
Candida tropicalis is a potentially useful organism for the commercial production of ethanol as it is capable of fermenting starch at a low rate. To enhance this carbon source utilization and increase the rate of alcohol production, we pretreated corn soluble starch with alpha-amylase. Starch liquefaction was sufficient to drive the fermentation and to convert 96% substrate to ethanol. Indeed, in the presence of exogenous alpha-amylase, 9% (w/v) soluble starch was converted to 43.1g ethanol/l in 65 h with a productivity of 0.65 g/l h. Thus, bio-ethanol production using free and calcium alginate-immobilized C. tropicalis does not require the saccharification step. Furthermore, fed-batch fermentation by free C. tropicalis cells increased the final concentration to 56 g ethanol/l, reaching published values for Saccharomyces cerevisiae recombinant strains expressing both alpha-amylase and glucoamylase. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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