High Improvement in Lactic Acid Productivity by New Alkaliphilic Bacterium Using Repeated Batch Fermentation Integrated with Increased Substrate Concentration.

ABSTRACT: Optically pure lactic acid (LA) is an important chemical platform that has a wide range of industrial and biotechnological applications. Improved parameters for cost effective LA production are of great interest for industrial developments. In the present study, an alkaliphilic lactic acid bacterium, BoM 1-2, was selected among 369 newly obtained bacterial isolates. It was characterized using API 50 CHL kit and identified as Enterococcus hirae BoM 1-2 by 16S rRNA gene sequence analysis. Efficient polymer-grade L-lactic acid production was achieved at pH 9.0 and 40°C. In batch fermentation strategy using 20 g L^-1 glucose, 19.6 g L^-1 lactic acid was obtained with volumetric productivity of 2.18 g L^-1h^-1. While using 100 g L^-1 glu

SUBMITTER: Abdel-Rahman MA 

PROVIDER: S-EPMC6354166 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature