WATER PURIFICATION AND CLARIFICATION PLANT Russian patent published in 2000 - IPC

FIELD: preliminary purification of surface and subsurface water at high hardness (up to 300-400 mg-eg/l) and high content of ferrum; demineralization systems for preparation of service and drinking water. SUBSTANCE: proposed plant includes aerator, clarifier and sand filter. Used as aerator is water ejector with supply pump whose suction branch pipe is connected with starting water main running from area of clarifier suspended residue; plant is also provided with reagent supply main, clarifier with pump for delivery of water to sand filter and two pressure filters with residue supply pumps whose suction branch pipes are connected to respective flanges taking residues from clarifiers. EFFECT: possibility of obtaining useful products: dry residue of ferric oxide (pigment), softened and clarifier water. 1 dwg