Characterization of Clostridium ljungdahlii OTA1: a non-autotrophic hyper ethanol-producing strain

Applied Microbiology and Biotechnology - A Clostridium ljungdahlii lab-isolated spontaneous-mutant strain, OTA1, has been shown to produce twice as much ethanol as the C. ljungdahlii ATCC 55383...     

Shifts in pH affect the maltose/glycerol co-fermentation by Lactobacillus reuteri

In aerated cultures of Lactobacillus reuteri using maltose/glycerol, lactate was the main product followed by acetate at all pH (4.7, 5.5 and 6.5) tested while anaerobic cultures produced 1,3-propanediol besides lactate, acetate and ethanol. 1,3-Propanediol was the main product at pH 5.5 and 6.5. The high amount of acetate and the low concentration of ethanol found in anaerobic cultures was closely related to the synthesis of 1,3-propanediol.