Abstract: The present invention provides a novel method for manufacturing fumaric acid having favorable tone of color. A method for manufacturing fumaric acid, comprising the following steps (1) and (2): (1) a step of culturing a microorganism having fumaric acid-producing ability in a liquid culture medium comprising a carbon source to obtain one or more substances selected from fumaric acid and a fumarate, (2) a step of crystallizing the one or more substances selected from fumaric acid and a fumarate obtained in the step (1) in the presence of one or more surfactants selected from a nonionic surfactant and an amphoteric surfactant.

Abstract: The present invention provides a novel method for manufacturing fumaric acid having favorable tone of color. A method for manufacturing fumaric acid, comprising the following steps (1) and (2): (1) a step of culturing a microorganism having fumaric acid-producing ability in a liquid culture medium comprising a carbon source to obtain one or more substances selected from fumaric acid and a fumarate, (2) a step of crystallizing the one or more substances selected from fumaric acid and a fumarate obtained in the step (1) in the presence of one or more surfactants selected from a nonionic surfactant and an amphoteric surfactant.

Abstract: Provided is a method for producing lactic acid by use of a filamentous fungus, in which the productivity of lactic acid can be maintained at high level even when lactic acid is produced continuously. The method for producing lactic acid of the present invention includes a first fermentation step of carrying out fermentation by use of one or more fungus cells selected from the group consisting of pellet-form filamentous fungus cells and immobilized filamentous fungus cells in a liquid culture medium having a phosphate ion concentration of less than 0.007% by mass and containing a carbon source, to thereby produce lactic acid.