INSTALLATION FOR BIOLOGICALLY TREATING CONCENTRATED WASTE WATERS CONTAINING VOLATILE ORGANICS Russian patent published in 1998 - IPC

FIELD: waste water treatment. SUBSTANCE: installation consists of reactor with vertical annular partition in the center of its casing separating reaction space into flotation and aeration zones and provided with sludge fluid inlet port. Above the partition, in the center of casing, a tray is placed. In the middle of casing, there is also a connection pipe connected with waste water-supply pipeline which is, in turn, connected with aspiration line of circulation pump whose discharge line is connected to sprinkling circuit of the top of reaction zone and distributive pipeline located on the bottom of reactor and carrying peripherally disposed and radially oriented branch pipes. Sprinkling circuit is constructed in the form of nozzles disposed peripherally on annular partition. Discharge pipe for cleaned water is located on the central part of bottom of reactor. Air-supply system in the form of connection pipes provided with dispersers is located in the flotation zone above cleaned water-discharge pipe and peripherally with regard to reactor in the aeration zone. The latter also encloses biomass-admission attachment. Reactor casing is closed by cover with branch pipe connected to biofilter. EFFECT: enhanced waste water treatment efficiency. 1 dwg