Production of D-lactic acid from 1,2-propanediol by Pseudomonas sp. strain TB-135

Abstract

A newly isolated bacterium, strain TB-135, produces solely D-lactic acid from 1,2-propanediol (1,2-PD). From taxonomical studies, the strain was concluded to belong to the genus Pseudomonas. The optimal conditions for the acid production were found to be at 4% 1,2-PD and 0.2% yeast extract, when the strain produced 21mg/ml of the acid of a high optical purity (over 99% e.e.) after 4days of cultivation. Since it was considered that the acid was produced from (R)-(-)-1,2-PD, the molar yield was estimated to be 86%. © 1991 Science and Technology Letters.