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Appl Environ Microbiol. 1981 July; 42(1): 1-4

Citric Acid Fermentation by Aspergillus niger on Low Sugar Concentrations and Cotton Waste

Departments of Microbiology and Plant Pathology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel

ABSTRACT

The possible use of cotton waste as a carbohydrate source of citric acid production by Aspergillus niger was examined. No citric acid was produced when A. niger was grown on cotton waste as a sole carbon source. In two-stage fermentations, however, mycelium obtained from surface cultures in cotton waste medium yielded more citric acid when transferred to sucrose-containing media than when directly inoculated to sucrose-containing media. It is concluded that cotton waste can be used for saving sucrose and for increasing yields of citric acid fermentation by A. niger.