Fig. 4From: Enhanced 2,3-butanediol production from biodiesel-derived glycerol by engineering of cofactor regeneration and manipulating carbon flux in Bacillus amyloliquefaciens Effect of pH control strategy on 2,3-BD production by B. amyloliquefaciens GAR in fed-batch fermentation. a Without pH control; b At the first 16 h, the pH value was not under controlled, and after that point, pH was adjusted to 6.5.)Back to article page