Optimization of Solid Substrate Fermentation for the Production of Fungal Chitosan

다국어 초록 (Multilingual Abstract)

Improved conditions for the growth of the fungus Gongronella butleri in solid substrate fermentation resulted in a higher yield of extractable chitosan. Fermentation on sweet potato pieces with variable moisture content appeared to be optimal at 80% moisture, within the ranges tested. The yield was independent of the inoculum size, inlet airflow rate and inlet air humidity. Fermentation on 80% moisture solid state and at optimal temperature of 29 oC resulted in 70 percent more mycelium per kg of solid substrate as well as 40 percent more chitosan per g mycelium, as compared with fermentation under conditions of 53% moisture content and 26 oC. The chitosan yield of 4.6 g per kg solid substrate is a promising basis for economic production.

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