Figure 4From: Production of 1,3-PDO and butanol by a mutant strain of Clostridium pasteurianum with increased tolerance towards crude glycerolProfile of the fermentation of stored crude glycerol supplemented with activated stone carbon by MNO6. The initial glycerol concentration was 122 g/l, pH was maintained at 6, and the temperature was 37°C. Butanol concentration was measured in the fermentation broth. The arrow indicates the addition of 25 ml glycerol (250 g/l).Back to article page