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Production of lactic acid from whey using hydrolysed whey protein as nitrogen source

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Hydrolysed whey (lactose 4% w/vol) was fermented in laboratory reactors for production of lactic acid. By using a non0sterile unsupplemented continuous process with a hydraulic retention time of 10 hours, lactic acid was produced in a concentration of approx. 2.5 w/vol % with less than 0.1% volatile fatty acids and less than 0.2% lactose/galactose present in the effluent.

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Lund, B., Norddahl, B. & Ahring, B. Production of lactic acid from whey using hydrolysed whey protein as nitrogen source. Biotechnol Lett 14, 851–856 (1992).

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