METHOD OF PURIFYING WASTE WATER FROM COBALT, MANGANESE AND BROMINE Russian patent published in 2012 - IPC C02F9/12 C02F1/58 C02F1/52 C02F1/46 C02F103/36 

FIELD: chemistry.

SUBSTANCE: waste water is treated with pulsed high-voltage discharges with simultaneous saturation of the water with air and subsequent purification on granular filters in the presence of a coagulant. A xanthogenate-containing substance is added to the treated water along with the coagulant. The cobalt xanthogenate residue is extracted by deposition, the obtained water is fed into a plasma-chemical reactor and the elementary bromine formed is separated in a degasifier. Demanganisation of water is carried out by filtering in a rapid electrochemical filter with a natural calcite bed. Manganese hydroxides are extracted from the flush water of the electrochemical filter via deposition. The wet residue containing cobalt xanthogenates, together with the coagulant, is fed the reactor by an air counter current from the degasifier containing elementary bromine. The residue formed in the reactor is taken for dehydration and the purified water is fed into a pure water reservoir, decontaminated with ultraviolet radiation and then fed into the recycled water supply system of an enterprise or for discharge.

EFFECT: increase in degree of purification of water purified from cobalt, manganese and bromine to the required maximum allowable concentration.

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