A device for wastewater treatment in temporary accommodation of the evacuated population, containing an aeration tank-clarifier with pipelines for the supply of wastewater and removal of the clarified liquid and a bioreactor, in which the aeration tank-clarifier is made in the form of a cylindrical tank open from above with a bottom, consisting of an aeration chamber with a feed device compressed air and clarification chambers, formed by dividing the cylindrical tank by a vertical inner partition into an inner cylindrical cavity and an outer annular one, while the bioreactor is combined with the aeration chamber and is built into the inner cavity of the clarifier aeration tank and is a hollow cylinder mounted on legs resting on a flat bottom aeration tank-clarifier, inside the cylinder there are tiers of alternating inclined surfaces in the form of hollow-bottom cups, rigidly attached to the cylinder wall, and cones, which are attached to the wall using flexible rods, and the sewage supply pipeline is located n directly in the bioreactor in its upper part, and the compressed air supply device - in its lower part under the lower tier of cups and is made in the form of a pipe with a porous ceramic tip, while the clarification chamber itself is located in the annular cavity of the clarifier aerotank and also has an autonomous source air supply, located in its lower part, characterized in that the liquid sprayer of the cleaning mechanism contains a housing with a swirl chamber and a nozzle insert, while the housing is made with an inlet pipe having an opening coaxial with it of the inlet cylindrical chamber, the chamber depends
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