what filtration area is needed to process 720 gpm at 6 gpm/ft2

Question

Water distribution math

Answer 1

Flow Rate = Filtration Rate*Surface Area =

 

              = 720 gpm * 6 gpm/ft^2

 

               = 4320 (gpm)^2/ft^2

 

 

I found the formula at:

http://biosandfilters.info/faq/how-do-you-calculate-appropriate-flow-rate-particularly-when-designing-non-standard-biosand

Answer 2

A = area = (flow rate) / (flow rate per unit area)

 

A = (720 gpm) / (6 gpm/ft²) = 120 ft²