OPTIMIZATION OF SODIUM-NITRITE BORIC-ACID REVERSE-OSMOSIS (RO)-SEPARATION

For the reason that a single stage RO-separation gives small concentra tion differences between given solutes, the use of multistage RO-separ ation is unavoidable with a two-or three-stage RO-processing with vari ous recirculations, the system becomes rather complicated, so the sear ch of the optimum (both in technical and economical viewpoints) is a n ecessary but difficult task. A relatively simple mathematical modellin g method of the given separation process is discussed in order to find the optimum separation between sodium nitrate and boric acid in case of given membrane modules and input concentrations of components.