FIELD: technology of treatment of natural waters and physico-chemical treatment of sewage waters. SUBSTANCE: used for treatment of natural and sewage waters is coagulant in the form of aqueous suspension of calcium hydrocarboaluminate which is capable of forming suspension with water with homogeneous disperse phase possessing large active surface with size of solid phase particles regulated in production of coagulant. EFFECT: treatment of natural and sewage waters without reduction of their alkalinity and pH and also without increasing sulfate content in water. 2 dwg, 3 tbl
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