REACTOR FOR BIOLOGICAL TREATMENT OF WASTE WATER AND METHOD Russian patent published in 2017 - IPC C02F3/12 

FIELD: ecology.

SUBSTANCE: invention relates to biological treatment of effluents, particularly, municipal waste water, industrial waste water, as well as process water and water from a water distributing system, which is necessary to be made drinking water. Method for biological treatment means that water to be purified and oxygen-containing gas are directed in the upward unidirectional flow mode into the same reactor containing as a biological filtering material a dense filtering bed and a volume of movable hollow carriers having a protected surface area serving for the increase of a biological film. Reactor for biological treatment includes a chamber for swelling out and removal of sludge, a gas supply system, a liquid supply system, a biological filter comprising the dense filtering bed of particles retained by a perforated retaining upper wall in the lower part of the above said reactor from moving upwards and a volume of movable particles contained inside the said chamber for swelling out and removal of sludge. Movable particles have higher density than that of the filtering bed particles. Method of purifying additionally involves the stages of performing periodic backwash.

EFFECT: invention provides higher efficiency.

14 cl, 6 dwg, 2 tbl