Basic Units of Measurement and Conversions - Basic Mathematics for Water and Wastewater Operators - page 67

Solution :

Flow = 28 MGD × 1,000,000 gal/MG = 28,800,000 gpd

■ Example 2.123
Convert million gallons per day to cubic feet per second.

Flow (cfs) = Flow (MGD) × 1.55 cfs/MGD

Problem: The flow rate entering the grit channel is 2.90 MGD. What is the flow rate
in cubic feet per second?

Solution :

Flow = 2.90 MGD × 1.55 cfs/MGD = 4.50 cfs

■ Example 2.124
Convert gallons per minute to million gallons per day.

Flow (gpm) 1440 min/day
1,000,000

×

Flow (MGD) =

gal/MG

Problem: The flow meter indicates that the current flow rate is 1475 gpm. What is the
flow rate in million gallons per day?

Solution :

1475 gpm 1440 min/day
1,000,000 gal/MG

×

Flow = = 2.12 MGD

■ Example 2.125
Convert gallons per day to million gallons per day.

Flow (gpd)
1,000,000 gal/MG

Flow (MGD) =

Problem: A totalizing flow meter indicates that 33,400,900 gal of wastewater have
entered the plant in the past 24 hr. What is the flow rate in million gallons per day?

Solution :

33,400,900 gpd
1,000,000 gal/MG

Flow = = 33.4 MG D