Fig. 5
From: Mass transfer and flow characterization of novel algae-based nutrient removal system
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13068-021-01951-9/MediaObjects/13068_2021_1951_Fig5_HTML.png)
Salt 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 occupied