INSTALLATION FOR BIOLOGICAL PURIFICATION OF HUSBANDRY WASTE WATER Russian patent published in 1997 - IPC

FIELD: waste water purification. SUBSTANCE: installation contains arrangement for crushing solid inclusions, air tank-settler, aeration unit, and tank for settling down active sludge. Installation is additionally provided with receiving tank and settler positioned before air tank-settler and successively connected with the latter and between each other. Settler is successively connected through air tank-settler to ozonation chamber pneumatically communicating with ozonator. Receiving tank has back hydraulic connection with air tank-settler through control valve. In another embodiment of invention, installation is additionally provided with drainage-receiving tank, receiving tank, and settler positioned before air tank-settler and successively connected with the latter and between each other. Receiving tank communicates through siphon with air tank-settler, ozonation chamber pneumatically communicating with ozonator, which in turn is connected through control valve with compressor. Installation also includes pneumatically interconnected ozonation chamber and chamber for receiving and dehydrating precipitates, the former being hydraulically connected with air tank-settler and control well. The second modification of installation additionally offers possibility of running installation in condition of forcibly feeding waste water to be purified from a level lower than level of location of installation. EFFECT: enhanced efficiency of process. 14 cl, 7 dwg