Direct fermentation of cellulosic materials by Fusarium oxysporum 841: Acetic acid/ethanol production and tolerance.

SINGH AJAY, KUMAR P. K. R., SCHUGERL K.

doi:10.2323/jgam.38.227

Direct fermentation of cellulosic materials by Fusarium oxysporum 841: Acetic acid/ethanol production and tolerance.

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SINGH AJAY

Institute fur Technische Chemie
KUMAR P. K. R.

Institute fur Technische Chemie Department of Genetics and Breeding, Fermentation Research Institute, Agency of Science and Technology
SCHUGERL K.

Institute fur Technische Chemie

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説明

Direct fermentation of cellulosic materials to acetic acid and ethanol was studied using a cellulolytic strain of Fusarium oxysporum DSM 841. It produces extracellular enzyme complex consisting of avicelase, CMCase, cellobiase and xylanase activities with hydrolytic potential of 80-87% of different cellulosic substrates. Acetic acid (12g/l) and ethanol (3.6g/l) were obtained with yields of 0.36g/g and 0.1 g/g from potato waste (cellulosic waste from starch industries). F. oxysporum 841 was able to ferment D-xylose as efficiently as it could D-glucose. It exhibited relatively higher product tolerance. Mechanism of inhibition of cellulase effectiveness in the presence of acetic acid/ethanol is also discussed.