Fermentative lactic acid preparative method to produce at least 40g/litre free lactic acid

摘要

A process for the production of lactic acid products from a mixture containing free lactic acid and dissolved lactate salt, the method comprising the steps of: (a) incubating a culture of acid-tolerant lactate producing microorganisms in nutrient medium at an average incubation pH of no more than 4.8 to produce an aqueous mixture which includes at least 40 g/litre of lactate material comprising lactic acid, lactate salt, or a mixture thereof, and (b) separating the aqueous mixture from the acid-tolerant lactate producing microorganisms, and (c) preferentially separating lactic acid from the mixture to form a lactic acid containing stream.