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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: Biotechnol Bioeng. 2019 Nov 28;117(3):763–775. doi: 10.1002/bit.27225

Figure 2.

Figure 2.

Oxygen gradient in the MPOC device. (a) The plot of measured oxygen levels versus varying sulfite and cobalt concentrations in the water where an oxygen range of 15.9%-0% was obtained. The measurements were performed in 50 mL conical tubes. (b) Simulation of the oxygen gradient by COMSOL Multiphysics. (c) Plotted steady-state oxygen gradient profile of the MPOC device after perfusion with 0% sulfite/0 μM cobalt and 1% sulfite/100 μM cobalt, showing a gradient of 6.9%-0.3% O2. (d) Representative oxygen profile in the MPOC device measured by the Presens system. Inlet 1: 0% sulfite/0 μM cobalt and inlet 2: 1% sulfite/100 μM cobalt. All data were obtained from at least three different experiments.