How many gallons of 12.5% sodium hypochlorite solution are needed daily for a 1.5 MGD flow with a dose of 2.5 mg/L?

Study for the Water Treatment Class E Test. Prepare with flashcards and multiple choice questions, each question features hints and explanations. Get ready for your certification exam!

To determine the amount of 12.5% sodium hypochlorite solution needed daily, the calculation starts by figuring out how much chlorine is required based on flow rate and dosage.

  1. Flow Rate Conversion: Convert the flow from million gallons per day (MGD) to gallons.
  • 1.5 MGD equals 1.5 million gallons, which converts to 1,500,000 gallons.
  1. Calculate Total Dose Required: The required dose is given as 2.5 mg/L. To find out the total mass of chlorine needed for a day:

  • Use the formula: Total dose (mg) = Flow rate (gallons) x Dose (mg/L).

  • First, convert gallons to liters. Since there are approximately 3.785 liters in a gallon, 1,500,000 gallons is about 5,678,000 liters.

  • Now calculate the total mass: 5,678,000 L x 2.5 mg/L = 14,195,000 mg, which can also be expressed as 14,195 grams (since 1,000 mg = 1 gram).

  1. Convert to Ounces:
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