Figure 3. Dynamics of volumetric citric acid productivity, Q_CA (∆), and specific citric acid production rate, q_CA (■), in fed-batch culture of Y. lipolytica Wratislavia 1.31 (a) and Y. lipolytica Wratislavia AWG7 (b) strain growing on crude glycerol (SG BODDINS GmbH, Germany).
Cultivation conditions: glycerol (150 g∙L^-1) was fed to the culture broth medium after 50 hrs of cultivation with a constant feeding rate of 1.4 g∙h^-1 to obtain a final glycerol concentration of 300 g∙L^-1.
Data are the average of duplicate cultures. Error bars indicate the standard deviations of mean data values.