Example 424

Problem: A new industry wishes to connect to the city's collection system. The industrial discharge will contain an average BOD concentration of 389 mg/L, and the average daily flow will be 72,000 gpd. What is the population equivalent of the industrial discharge?

Solution: First, convert flow rate to million gallons per day:

72,000 gpd 1,000,000 gal/MG

Next, calculate the population equivalent:

0.17 lb BOD/person/day

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