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nature : from the use of microbial fermentation of carbohydrates or hydrocarbons citric acid production process. Citric acid is a good metabolism via gas (TCA cycle) and the intermediate product, which is due to the accumulation of medium and the lack of nutrition caused abnormal metabolism results. Fermentation is solid-state fermentation, the fermentation liquid surface and submerged fermentation three. Based on the latter. The raw material for fermentation of starch hydrolysis sugar, sucrose, molasses and oil, China's Dry Potato used as raw material, not add any nutrients to the fermentation process, unique to the world. Most strains using Aspergillus niger (Aspergillus niger), paraffin compounds used as raw material, the use of lipid solution Candida (Candida lipolytica). Citric acid extract alkali salt has been used, in recent years solvent single copying or chromatography directly from the fermentation broth of citric acid extraction.
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