A water supply source that supplies a maximum of 1,000 m/day contains 100 g of toxic organic substances/L that traditional treatment processes cannot eliminate. Fortunately, these organic substances are highly soluble in liquid zorbitol (g.e. =1.5), so the concentration of toxic organic substances in zorbitol is 100 times higher than in water. If they are used 5 m/day of zorbitol, determine the concentration of toxic organic substances that will be reached in the water in a. A single-stage mixer settler (fig 11.13a) b. A two-stage countercurrent mixer settler system (fig 11.136)