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Package Plants
Detention Time
The rectangular chlorine contact chamber is 10 feet long, 15 feet wide and 10 feet
deep. If the flow rate in to the chlorine contact chamber is 1.0 MGD, what is the
detention time?
Formula Needed
Length x Width x Depth x 7.48 cubic feet/gallons
10 x 15 x 10 x 7.48 = 11,220 gallons
Volume MG x 24 Hours = Detention Time in Hours
Flow MGD
0.0112 MG x 24 Hours = 0.26 Hours
1.0 MGD
Is the Chlorine Contact Chamber providing at least 90 minutes of contact time?
Answer – No
