Patent ID: 7892437

Claim:
A method of removing solids from process water, comprising the steps of: (a) receiving process water discharged from an aggregate plant; (b) passing said process water through a mesh screen to remove rocks and debris; (c) collecting said process water in a sump; (d) passing said water through a plurality of centrifugal cyclones to remove fines from the water; (e) introducing a flocculant into said process water from the cyclones, wherein a first flocculant solution is introduced to said process water at a first location; a second flocculant solution to said process water at a second location downstream of said first location and just before a storage pond; (f) discharging said process water into said storage pond, said pond having a wall of concrete blocks, wherein floc-sand precipitates from said process water; and (g) discharging a clear water solution from said storage pond into a settling pond.