
Concentration (milligrams/liter
or parts/million) to quantity (pounds or kilograms)
*Concentration to Pounds:
The solids concentration
in the aeration tank is 2580 mg/L. The tank volume is 0.90
MG. How many pounds of solids are in the tank?
*Concentration to Kilograms:

Concentration
(milligrams/liter or parts/million) to quantity (pounds or
kilograms)/Day
*Concentration to Pounds/Day:
How many pounds of solids are discharged
per day when the plant effluent flow rate is 4.85 MGD and the
effluent solids concentration is 23 mg/L?
*Concentration to Kilograms/Day:
The effluent contains 27 mg/L of BOD5. How many kilograms
per day of BOD5 are discharged when the effluent flow rate is
11.5 MGD?

Quantity (Pounds or
Kilograms) to Concentration (milligrams/liter or
parts/million)
The process control calculation indicates that
the aeration tank should contain 12,168 pounds of suspended solids.
The tank has a volume of 0.61 MG. What should the suspended
solids concentration be in the aeration tank?