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Box-and-whisker diagram (with outlier indicated as single points) of TAN recovery evaluated at 20 A/m2 with 1, 2, and 3 TMCS modules (A) and TAN recovery evaluated at applied current densities of 20, 50, and 100 A/m2 (B). Increasing the surface area of the gas-permeable hydrophobic membrane (e.g., number of TMCS modules) did not affect TAN recovery. However, increasing the applied current density while maintaining a load ratio of 1.3 resulted in a decreasing TAN recovery.
