CHAPTER 5 Q7. Determine the lime storage volume required for the following conditions: Average water demand = 0.18 m3/s Maximum dosage = 200 mg/L as CaO Shipping time = 1 week Lime is an interruptible chemical Assume the bulk density and purity of lime is the average of the values given in Table 7.. TABLE Q7: CHARACTERISTICS OF COMMON WATER AND WASTEWATER TREATMENT CHEMICALS AND MATERIALS Chemical or Trade Formula Name Activated carbon Specific Bulk Density Total Gravity (kg/m³) Molecular Weight Active Molecular Weight Active (%) Commercial Freezing Suitable storage material Strength (kg/ point (°C) 1.3-1.7 240 to 480 Dry: iron, steel; wet: rubber and silicon linings, type 316 stainless steel Alum Al2(SO4)3 1.32 1,340 342 342.0 100 50.0 -13 FRP,b PE,c type 316 Ammonium NHACH 0.9 900 35 35.0 100 29 hydroxide stainless steel, rubber linings Glass lining, steel, iron, FRP, PE Anhydrous NH3 620 17 99.9+ ammonia Calcium oxide CaO 560 to 56 75 to 99 FRP, PE, iron, steel, rubber 1,140 Typical Caustic soda NaOH 1.54 1,530 40 40.0 100 50.0 10 Carbon steel, polypropylene, FRP, rubber lining Chlorine C12 1,470 70.9 99.8 Ferric chloride FeCl3 1.42 1,430 162.5 162.5 100 37 to 47 Typical �40.0 Ferric sulfate Fe2(SO4)3 1,100 561.7 399.7 71 90-94 9H2O Fluorosilicic H2SiF6 1.21 1,210 144.1 144.1 79.2 40 acid Phosphoric acid H3PO4 1.57 1,570 98 95.0 96.9 75.0 to 85 -17.5 Sodium bisulfite NaHSO3 1.2 to 1,200 to 104.06 28 to 43 1.4 1,400 Sodium Na2CO3 500 to 106 97 to 99.4 carbonate 1,100 Sodium fluoride NaF 800 to 42 90 to 95 1,200 Sodium NaOCI 1.21 1,210 74.5 51.5 69.1 12 to 15 -17.8 hypochlorite (available C12) Shipping containers Glass, PVC, and rubber linings; FRP, PE Glass, plastic, and rubber linings; FRP, PE, type 316 stainless steel Rubber-lined steel, PE FRP, epoxy, rubber lining, polypropylene, type 316 stainless Plastic, FRP, stainless steel Iron, rubber lining, steel, FRP, PE Iron, steel, FRP, PE Ceramic, glass, plastic, and rubber linings, FRP, PE 4 Sodium Metabisulfite Sodium sulfite Sulfuric acid Na2S2O5 Na2SO3 H2SO4 1.48 1,480 190.10 1,280 to 144 126.04 1,300 98 98 100 77 Sulfur dioxide SO2 64.09 99 98 23 (available SO2) Sodium sulfite Sulfuric acid Plastic, FRP, stainless steel Cast iron, rubber lining, steel, FRP, PE FRP, PE, porcelain, glass, and rubber linings Sulfur dioxide Shipping container