Question

a rapid sand filter has the following conditions:

volumetric flow filtered = 3000 m^3/d, clean bed filtration velocity = 4.6 m/h, water temp of 8 degrees Celsius, filter porosity during filtration =.43, filter porosity during backwash=.65, length of bed=.75m, particle diameter of media=.68mm, particle shape factor=.82, settling velocity of filter particle=.10 m/sec

given this information, please calculate the clear water head loss, the depth of the filer during backwash, the velocity of backwash, and the total surface area of the filter bed

Answer 1