FIELD: chemistry.
SUBSTANCE: invention relates to methods and apparatus for electrochemical treatment of water and can be used in treating drinking water for apartments, offices, medical institutions and catering facilities. The method involves treating water in flow mode in a separate reactor 2 using a bunch of parallel soluble electrodes 3. From the reactor, the water is fed into a settling reactor 12, where it undergoes electroflotation using a bunch of insoluble electrodes 13 in filling and settling mode. After raising the coagulant to the mouth 14 of the settling reactor, the coagulant is drained and the water is filtered. The stream of coagulant formed during electroflotocoagulation and floated to the surface of the settling reactor is converged while maintaining continuity of that stream using a movable water-impermeable inverted cone 4 immersed into the mouth of the settling reactor without touching its walls. The stream of floating coagulant is slowed down through abrupt expansion of the raising channel in the region of the mouth of the settling reactor, created by a plate 15 for collecting the coagulant 6 attached around the outer side of the walls of the mouth of the settling reactor. The stream of the floating coagulant is cut off in the region where its abrupt expansion begins by covering the seat of the mouth of the settling reactor with the movable water-impermeable inverted cone, accompanied by displacing the volume of water from the settling reactor and raising the level of the coagulant in the plate for collecting the coagulant. The coagulant is drained by displacing the volume of water through an apparatus for removing the coagulant, which is fitted with a valve 16. Water remaining inside the settling reactor is drained while subjecting it to finishing treatment by applying supply voltage across a bunch of insoluble electrodes 18 lying in the stream of the drained water.
EFFECT: invention enables efficient floatation of flocculi of the formed coagulant, its efficient removal and, as a result, improved physical-chemical, sanitary-epidemiological and organoleptic properties of the treated water.
2 cl, 4 dwg
