Effect of acetic acid on astaxanthin production by Phaffia rhodozyma

Meyer, P.S.; Du Preez, J.C.

Effect of acetic acid on astaxanthin production by Phaffia rhodozyma

1993

Meyer, P.S. | Du Preez, J.C.

Low concentrations of acetic acid decreased the growth rate of and astaxanthin production by Phaffia rhodozyma on glucose, with growth completely inhibited by 2 g acetic acid/l. Using H2SO4 for pH control after sugar depletion caused a decline in the biomass concentration, whereas using acetic acid as titrant resulted in an increase in the biomass with a high astaxanthin content of 1430 micrograms/g cells. An extended culture with a continuous glucose feed failed to maintain a high astaxanthin content.

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