FIELD: cleaning devices.
SUBSTANCE: invention is intended for sewage treatment. Wastewater treatment plant contains a vertical cylindrical double-shell activation tank, in the central part of which there are two mutually parallel dividing walls (19), limiting the central part between them for aerobic stabilization of activated sludge and at the same time separating in relation to inner case (18) of the activation reservoir two symmetrically arranged functional spaces for wastewater and purification cultures, in each of which secondary clarifiers (5) are separately installed. Secondary clarifiers (5) are made tapering downwards. Along the axis of each clarifier (5) is hollow cylinder (14), connected to the inner space of the activation reservoir using transverse supply pipe (13), and to the inner space of secondary clarifier (5), to which aero tank (4) is located on the outside. Perforated compressed air piping is laid along the bottom surface of the activation tank. Central part of the wastewater treatment plant is vertically divided into several interconnected through holes of the chambers, which form selector (2), connected by its entrance to the outlet of a large sewage separator or the outlet of a drum separator located outside the activation tank. Selector (2) is connected by its output to denitrifier (3) located between two housings (17, 18) of the activation reservoir. In the partitions of selector (2), surface (21) and bottom (22) closures are installed, made with the ability to start and ensure smooth operation of the station at 10 % of the incoming wastewater from the station's nominal power. In denitrifier (3) there are agitators (10) arranged to enable movement of the mixture of waste water and sludge throughout its volume. Denitrifier (3) is connected to the part of the activation tank space in the aero tank area (4) by means of through holes, into which the connection with secondary settling tank (5) is brought out with the help of transverse supply pipe (13). Lower space of secondary clarifier (5) is connected to the central part of the wastewater treatment plant.
EFFECT: invention allows to increase the arsenal of technical means for wastewater treatment with the ability to create a compact unit located in one tank.
12 cl, 3 dwg
