title: Selective production of lactic acid in continuous anaerobic acidogenesis by extremely low pH operation.
abstract: The selective production of lactic acid by anaerobic acidogenesis with low pH control was examined using a chemostat culture. By decreasing culture pH to 3.5 in a chemostat culture containing mixed microbial populations for anaerobic acidogenesis, heterolactic fermentation became dominant, resulting in the selective production of lactic acid and ethanol. This phenomenon was reversible between the acidic and neutral conditions, and was not affected by the dilution rate. The extremely low pH operation was effective for selective lactic acid production in anaerobic acidogenesis.
authors: Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, Koen-cho 165, Kitami, Hokkaido 090-8507, Japan.
authors: Yuya
authors: Y
authors: Itoh
authors: Kiyoshi
authors: K
authors: Tada
authors: Tohru
authors: T
authors: Kanno
authors: Jun-Ichi
authors: J
authors: Horiuchi
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000096:biosynthesis*
chemical_list: D019344:Lactic Acid; D000431:Ethanol