Design a new sand filter for a small operation. The estimated flow rate for this

Question

Design a new sand filter for a small operation. The estimated flow rate for this site is 2050 m^3/day. The surface overflow rate should exceed 105 m^3/m^2/d. What will be the surface area of the After? You can use some leftover Ottawa sand (d_10 = 0.00053m) from your last filtration project. How deep should the filter be? Once the filter has been put in place, and a few weeks of ripening has taken place, SB wants CK to check what removal efficiency the filter has. CK measures the concentration of particles going into the filter as 200ppm. The effluent is 38ppm. What efficiency has CK achieved? Is this the best he can do? (c3) (10)

Explanation / Answer

Solution - The filter area is calculated by below equation,

HLR = Q / A

where, HLR = Hydraulic loading rate in m3/m2/d = 105

Q = flow rate = 2050 m3 / day

so, Area A = 2050 / 105 = 19.52 m2

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