METHOD OF TREATMENT OF SEWAGE WATERS OF TITANIUM-MAGNESIUM PRODUCTION Russian patent published in 1999 - IPC

FIELD: methods of water treatment, treatment of industrial and household sewage water. SUBSTANCE: method includes mixing of industrial sewage water, neutralization of sewage water with lime milk, with supply rate of lime milk of 8-12 cu.m/h into continuously moving flow of industrial sewage along tray at rate of 250-400 cu.m/h with continuous mixing by air with air-sewage ratio of 1;(29-51), and air blown from below through sewage flow, and obtaining of neutralized solution up to alkali medium which is supplied continuously at definite velocity to stage of treatment with flocculant where continuously supplied into neutralized solution at velocity of 0.65-1/5 m/s is flocculant solution at rate of 0.3-0.4 cu.m/h. Flocculant solution is used in form of praestol with concentration of 0.05% and flocculant-solution ratio equalling 1:(38-40). Then, obtained solution is supplied is supplied to clarification stage at velocity of 1.1-1.5 m/s in counterflow to movement of slime precipitated particles, then, to stage of separation of clarified water from slime, and stage of slime thickening. After slime thickening, solution is returned to clarification stage or to process head. EFFECT: higher productivity of treatment of sewage waters of titanium-magnesium production. 9 cl