| abstract |
In lactic acid fermentation of microorganisms, when lactic acid is separated and purified from a fermentation broth after completion of fermentation, if the lactic acid solution is heated by an operation such as distillation without removing the colored components, the lactic acid is colored by the Maillard reaction. There is a problem. Provided is a method for producing lactic acid, comprising a step of removing a coloring component before the occurrence of coloring. A method of purifying lactic acid, which can effectively separate and remove colored components by filtering a lactic acid fermentation broth of microorganisms through a nanofilter. [Selection figure] None |