Example 127

Problem: A treatment plant removes 10 ft3 of grit in one day. How many cubic feet of grit were removed per million gallons if the plant flow was 9 MGD?


Problem: The total daily grit removed for a plant is 250 gal. If the plant flow is 12.2 MGD, how many cubic feet of grit are removed per million gallons of flow?

Solution: First, convert gallon grit removed to cubic feet:

250gal 3 = 33ft3 7.48 gal/ft3

Next, complete the calculation of cubic feet per million gallons:

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