Abstract
The production of pullulan from brewery wastes by Aureobasidium pullulans in shake flask culture was investigated. The maximum pullulan concentration (6.0 g/l) was obtained after 72 h of fermentation. The external addition of nutrients into the spent grain liquor improved significantly the production of pullulan. In this case, the highest values of pullulan concentration (11.0 ± 0.5 g/l), pullulan yield (48.2 ± 1.5%), and sugar utilization (99.0 ± 0.5%) were obtained in the medium (pH 6.5–7.5) supplemented with K2HPO4 0.5%, l-glutamic acid 1%, olive oil 2.5%, and Tween 800.5%.
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