Ethanol produced by fermentation of waste tobacco materials
- Received Date: 15/07/2009
- Accepted Date: 23/04/2009
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Key words:
- waste tobacco materials /
- ethanol /
- fermentation /
- sulfuric acid hydrolysis
Abstract: The potential of tobacco waste as a raw material for ethanol production was investigated. In this work, the effects of concentration of sulfuric acid, solid-liquid ratio and time on reducing sugar yield were studied using single factor tests. Best results were achieved at 50%(w/w) acid loading, 10%(w/v) solid-liquid ratio and 100 min. Under the optimal hydrolysis conditions, the maximal ethanol concentration and ethanol yield, with Sacchharomyces cerevisiae, were 1.09 g/L and 54.5 g/kg, respectively from filtered hydrolysate(diluting 5 times). However, the maximal ethanol concentration and ethanol yield, with Sacchharomyces cerevisiae, were 1.23 g/L and 61.5 g/kg, respectively from unfiltered hydrolysate (adding 70 U/100 mL cellulose and diluting 5 times).
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