Fig. 2

Production of PHB by H. boliviensis using an air-lift reactor with an air inflow that varied between 0.5 and 0.9 L/min and feed of glucose after 13.5 h of cultivation. The maximum airflow rate was reached at 13.5 h, pH was maintained at 7.5 and water at 35 °C was circulated by the jacket of the reactor. Glucose was the main carbon source. A solution of glucose (500 g/L) was fed to the reactor after 13.5 h of cultivation. Experiments were performed in duplicate. CDW, cell dry weight and RCM, residual cell mass