STATION FOR BIOLOGICAL TREATMENT OF WASTE WATER (VERSIONS) Russian patent published in 2012 - IPC C02F9/14 C02F3/30 

FIELD: chemistry.

SUBSTANCE: invention relates to apparatus for biological treatment of domestic waste water and industrial waste water of similar composition, and can be used in public utilities and on industrial plants. The station for two-step biological treatment of waste water according to the first version has a cylindrical shape and comprises a production building 28 and a block of process reservoirs, which is divided into four process segments with possibility of independent parallel operation of their process lines which are in form of radial channels. The process reservoirs of each segment represent: a pre-anoxide zone 4, an anaerobic zone 3, an anoxide zone 5, a highly-loaded aerotank-mixer 6, a two-step thin-layer desilter device 8, an aerotank-nitrifier-displacer 13, a settler-clarifier 15, a pre-filter with a charge 21, a rapid filter with a suspended layer of granular charge 25 and a thin-layer settler. The two-step desilter 8 in the first version employs the principle of counter-flow of a sludge mixture in shelves of the thin-layer elements, having a different shape of the inter-shelf section. In the second version, the station comprises a production building and a block of process reservoirs, in which there are two rectangular sections arranged in parallel with possibility of their independent parallel operation. The composition of the treatment process lines of the second version is identical to that of the first version. The difference is the use of a two-step thin-layer desilter with direction of movement of the sludge mixture based on the principle of descending and ascending streams.

EFFECT: separation of processes of oxidising carbon-containing substances and nitrogen of ammonium salts in series-arranged separate process reservoirs.

17 cl, 8 dwg