18.2 Well water having a total hardness of 300 mg / L as CaCO , is softened by split treatment . A zeolite bed takes 3/4 of the total flow and produces water at a hardness of 3 mg / L . as CaCO , One - fourth of flow is directly mixed with the softened water . The zeolite bed has 28.3 m² resin capacity . The water softening capacity of the resin is 62 kg / m³ total hardness as CaCO ,. Exhausted resin is regenerated by 98 percent pure NaCl solution . The salt consumption is three times the theoretical amount and used as 4 percent salt solution . Calculate ( a ) regeneration period if 950 m³ per day of water is passed through the softener , ( b ) the hardness of the fin ishod water , and ( c ) salt consumption per regeneration cycle

18.2 Well water having a total hardness of 300 mg / L as CaCO , is softened by split treatment . A zeolite bed takes 3/4 of the total flow and produces water at a hardness of 3 mg / L . as CaCO , One - fourth of flow is directly mixed with the softened water . The zeolite bed has 28.3 m² resin capacity . The water softening capacity of the resin is 62 kg / m³ total hardness as CaCO ,. Exhausted resin is regenerated by 98 percent pure NaCl solution . The salt consumption is three times the theoretical amount and used as 4 percent salt solution . Calculate ( a ) regeneration period if 950 m³ per day of water is passed through the softener , ( b ) the hardness of the fin ishod water , and ( c ) salt consumption per regeneration cycle