Assume that maximum 50% of ...
Published by Sam Shaheen
Assume that maximum 50% of the membrane weight is now water (i.e., if the membrane weight is 36 lbs, it is now 36 + 0.5x36).
As for the white color, that is calcium carbonate. To verify that, dip the membrane into acidic water (pH of 2 to 4) and observe the change in color. If the color disappears, that is CaCO3.
If the membrane is scaled severely, most of the weight will come from the precipitation of scaling on the membranes.