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  • Title: Enhanced exopolysaccharide production by Cordyceps militaris using repeated batch cultivation.
    Author: Wang CC, Wu JY, Chang CY, Yu ST, Liu YC.
    Journal: J Biosci Bioeng; 2019 Apr; 127(4):499-505. PubMed ID: 30292670.
    Abstract:
    Cordyceps militaris exo-polysaccharides (EPS) have been reported to possess many benefits, such as anti-tumor, anti-inflammatory and antioxidant activities. In this study, the production of EPS via cultivation in a bioreactor was investigated. Glucose and yeast extract were determined to be the most suitable carbon and nitrogen sources for EPS production. The appropriate levels of glucose and yeast extract were 40 g/L and 10 g/L, respectively, resulting in EPS production of 1.686 g/L in a submerged culture. In the stirred-tank fermentor, an agitation rate of 150 rpm and aeration rate of 1.5 vvm were the most effective for EPS production. Due to the anchoring of mycelial cells on the wall of fermentor, a repeated batch approach was used. EPS production of C. militaris could be enhanced to a maximum of 5.713 g/L, with a productivity of 476 mg/L/day in the second run. The repeated batch approach was expected to generate higher EPS production, increase EPS yield and productivity and further simplify cultivation operations for bio-industrial application.
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