Process for preparing citric acid by fermentation of carbohydrat

Details Process for preparing citric acid by fermentation of carbohydrat Process for preparing citric acid by fermentation of carbohydrat

1979-10-25

1981-07-14

Shapiro, Lionel M.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435803, 435813, 435923, C12P 742

Patent

active

042787645

ABSTRACT:
The commercial process of preparing citric acid by submerged fermentation of hydrolized carbohydrates under aerobic conditions with yeasts of the genus Candida, while maintaining the pH value at 5-7 by addition of calcium hydroxide, is improved by submitting the broth obtained from a first fermentation operation to a first centrifuging to separate calcium citrate and then to a second centrifuging to separate the yeast cells. The cells thus recovered are recycled for use in a further fermentation operation. The use of said recycle cells permits higher yields and outputs of citric acid to be obtained in the further fermentation operation.

REFERENCES:
patent: 3591455 (1971-07-01), Oppermann
patent: 3799840 (1974-03-01), Fukuda et al.

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