By Jacques Hadamard
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How many gallons per minute does it use? Solution: Convert MGD to gpm. 70 Problem: A pipeline has a carrying capacity of 2 cfs. How many gallons per minute can it handle? Solution: Convert cfs to gpm. 71 Problem: A well pumps 410 gpm. How many million gallons per day will it pump? Solution: Convert gpm to MGD. 72 Problem: A channel 30 in. 5 ft. 5 ft/sec, what is the flow in the channel in ft3/sec? What is the flow in gpm? Solution: 30 in. 73 Problem: The flow through a 24-in. 5 ft/sec. What is the flow rate in gallons per minute?
Because in this problem we wish to move to a smaller number, we should multiply by 5/9: (5/9) × 280° = 156°C 3. Now subtract 40°. 156°C – 40°C = 116°C Therefore, 240°F = 116°C. 28 Problem: Convert 22°C to Fahrenheit. Solution: 1. Add 40°: 22° + 40° = 62° 2. Subtract 40: 112° – 40° = 72° Thus, 22°C = 72°F. Obviously, knowing how to make these temperature conversion calculations is useful, but it is generally more practical to use a temperature conversion table. 29 Problem: Convert 56°F to °C. 30 Problem: Convert 68°F to °C.
13 Convert pounds to milligrams per liter. 34 lb/MG/mg/L Problem: An aeration tank contains 89,990 lb of solids. 45 MG. What is the concentration of solids in the aeration tank in milligrams per liter? 14 Convert pounds per day to milligrams per liter. 2 MGD. What is the concentration of chlorine applied to the effluent? 15 Convert pounds to flow in million gallons per day. 34 lb/MG/mg/L 18 Basic Mathematics for Water and Wastewater Operators Problem: If 9640 lb of solids must be removed per day from an activated biosolids process, and the waste activated biosolids concentration is 7699 mg/L, how many million gallons per day of waste activated biosolids must be removed?