Fig. 5From: Mass transfer and flow characterization of novel algae-based nutrient removal systemSalt mass transfer rates as a result of five water flow rates and three air flow rates across three salinity gradients (a–c). Calculated non-dimensional plots based on mass transfer values across three salinity gradients (d–f). g Summary of mass transfer rates as a function of three air flow rates (0.5 LPM, 5 LPM and 14 LPM) and three salinity gradients (1 ppt, 2 ppt and 5 ppt—represented by increasing sized circles) with membrane cartridges present. h Mass transfer rate across membrane cartridges as a function of volume ratio of cartridges occupiedBack to article page