Figure 3

Fermentation of P. putida KT2440 and KT2442 on gluconate. The process data for the fermentation of P. putida KT2440 and KT2442 on sodium gluconate (21.2 g L^-1) are depicted in the panels A-C and D-F, respectively. Biomass growth is represented in panels A and D with ln(OD₆₀₀) and with total biomass (CDW), PHA-free biomass (X_r), and PHA. The residual concentrations of organic carbon (TOC), carbon from gluconate (C(Gln)), and carbon from 2-ketogluconate (C(2-KGln)) can be read in panels B and E. These three values are expressed in g C L^-1 to facilitate their comparison. In the same panels is also shown the residual concentration of ammonium nitrogen (NH₄-N). In panels C and F are displayed the off-gas concentrations of oxygen and carbon dioxide, and the respiratory quotient (RQ). The two dashed lines indicate the exponential growth phases. Whether the values must be read on the left (L) or on the right (R) axes is written in the labels.