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AssigneeStandard-Messo Duisburg Gesellschaft Fuer Chemietechnik mit Beschraenkter Haftung & Co.
InventorsTheodor Messing, Karl H. Wamser
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A process and apparatus for the preparation of citric acid by fermentation of carbohydrate-containing nutrient substrates carried out in a fermentation chamber and having two separate air supply systems is disclosed wherein highly sterile air is preheated through coarse-fine-absolute filters, UV gate, and overheating to 120.degree. C, and fed into the fermentation chamber during the germination phase of a fermentation of carbohydrate-containing nutrient substrate in a quantity sufficient to maintain the chamber at a slightly positive pressure; the fermentation chamber is heated separately and independently of the air supply during the germination phase; the feeding of the highly sterile air and the heating of the fermentation chamber are discontinued during the fermentation phase, and fresh, normally filtered, unconditioned air is introduced in a quantity sufficient to maintain the fermentation solution at an optimum fermentation temperature.
Process for the fermentation of carbohydrate-containing nutrient substrate in the preparation of citric acid, wherein a fermentation solution is inoculated with a fermentation agent in a fermentation chamber, a layer of the fermentation agent covering the entire surface of the nutrient substrate is formed in a germination phase, and subsequently a fermentation phase is carried out, characterized in that air is pretreated to a highly sterile state and fed into the fermentation chamber during the germination phase in a quantity sufficient to maintain the chamber at a slight positive pressure;
Dependencies are inferred from the claim text.