Municipal solid waste and green chemistry

Influence of furfural concentration on growth and ethanol yield ofSaccharomyces kluyveri

LU Peng , CHEN Li-jun , Li Guo-xue , SHEN Shi-hua , WANG Li-li , JIANG Qi-yang , ZHANG Jin-feng


Received March 15, 2007,Revised June 05, 2007, Accepted , Available online

Volume 19,2007,Pages 1528-1532

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Furfural is an important inhibitor in ethanol fermentation process using lignocellulosic hydrolysates as raw materials. In order to find out the furfural concentration range in which furfural inhibits the fermentation process, we used one strain Saccharomyces kluyveri selected from soil and cultured in several different furfural content media under low glucose concentration condition. Experiment results showed that microorganism growth was stimulated and dry cell weight increased when furfural concentration in the medium was 0.25 mg/ml. Furfural had negative effect on cell growth when its concentration was above 1.00 mg/ml. At the same time, the strain growed better and had a higher glucose consumption rate in 5% original glucose concentration condition than in 3% original glucose concentration condition. The results showed that appropriate exaltation of original glucose concentration in stalk hydrolysates will increase the strain resistance to furfural.

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