Glucose hetero fermentation

Lactic acid is mainly prepared in large quantities (around 200 kT per year) by the bacterial fomentation of carbohydrates. These fermentation processes can be classified according to the type of bacteria used (i) the hetero-fermentative method, which produces less than 1.8 mol of lactic acid per mole of hexose, with otho- metabolites in significant quantities, such as acetic acid, ethanol, glycerol, mannitol and carbon dioxide (ii) the homo-fomentative method, which leads to greater yields of lactic acid and lower levels of by-products, and is mainly used in industrial processes [3]. The convo-sion yield from glucose to lactic acid is more than 90 per cent. 

Thomas, T. D., Ellwood, D. C. and Longyear, V. M. C. 1979. Change from homo-to hetero-lactic fermentation by Streptococcus lactis resulting from glucose limitation in anaerobic chemostat cultures. J. BacterioL 138, 109-117. 

Definition High m.w. hetero polysaccharide gum produced by a pure-culture fermentation of a carbohydrate with Xanthomonas campestris-, contains D-glucose, D-mannose, and D-glucuronic acid and is prepared as the sodium, potassium, or calcium sait Properties Wh. to cream-colored powd., si. organic odor, tasteless sol. in hot or cold water producing vise, highly-pseudoplastic sol ns. insol. in oils, most org. soivs. vise, 600 cps min. unaffected by high or low pH... 

Classification Polysaccharide gum Definition High m.w. hetero polysaccharide gum produced by a pure-culture fermentation of a carbohydrate with Xanthomonas campesths] contains D-glucose, D-mannose, and D-glucuronic acid and is prepared as the sodium, potassium, or calcium salt... 

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