The surface loading rate is the number of gallons of wastewater passing over 1 ft2 of tank per day. This can be used to compare actual conditions with design. Plant designs generally use a surface loading rate of 300 to 1200 gpd/ft2. Other terms used synonymously with surface loading rate are surface settling rate and surface overflow rate.
Surface Settling Rate (gpd/ft2) =-Flow (gpd)-2 (13.1)
Settling Tank Area (ft2)
Problem: A settling tank is 120 ft in diameter, and flow to the unit is 4.5 MGD. What is the surface loading rate in gpd/ft2?
Was this article helpful?
Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.