Abstract
A preliminary screening work selected Penicillium restrictum as a promising micro-organism for lipase production. The physiological response of the fungus towards cell growth and enzyme production upon variable carbon and nitrogen nutrition, specific air flow rate (Qa) and agitation (N) was evaluated in a 5-L bench-scale fermenter. In optimized conditions for lipase production meat peptone at 2% (w/v) and olive oil at 1% (w/v) were used in a growth medium with a C/N ratio of 9.9. Higher C/N ratios favored cell growth in detriment of enzyme production. Low extracellular lipase activities were observed using glucose as carbon source suggesting glucose regulation. Final lipase accumulation of 13,000 U/L was obtained, using optimized specific air flow rate (Qa) of 0.5 vvm and an impeller speed (N) of 200 rpm. Agitation showed to be an important parameter to ensure nutrient availability in a growth medium having olive oil as carbon source.
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© 1997 Humana Press Inc.
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Freire, D.M., Teles, E.M.F., Bon, E.P.S., Sant’Anna, G.L. (1997). Lipase Production by Penicillium restrictum in a Bench-Scale Fermenter. In: Davison, B.H., Wyman, C.E., Finkelstein, M. (eds) Biotechnology for Fuels and Chemicals. Applied Biochemistry and Biotechnology, vol 63-65. Humana Press. https://doi.org/10.1007/978-1-4612-2312-2_36
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DOI: https://doi.org/10.1007/978-1-4612-2312-2_36
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