SU1244109A1 - Air tank for biological purification of waste water - Google Patents

Description

The invention relates to a sewage treatment plant and is intended for the treatment of domestic sewage water and those closest in its composition.

The aim of the invention is to increase the degree of wastewater treatment by ensuring the mixing of the sludge mixture and controlling the circulation flow of activated sludge.

Figure 1 shows the proposed aerotank with a movable jumper in the lower position, longitudinal section; Fig, 2 - aeration tank with a movable jumper in the upper position, a longitudinal section,

Aerotank contains tank 1, divided by bridge 2 into aeration chamber 3 and settling 4. In the bridge, the top 5 to the bottom 6 windows are made. The aero tank has pipes 7 and 8, respectively, for supplying and discharging treated water, as well as a rotary-type mechanical surface aerator 9 located at the level of the inlet pipe and close to it at the discharge point from the distribution tray 10, B aeration chamber 3 is installed placed with a slope in the direction of the aerator and provided with a jetting protrusion 12, the upper edge of the partition 11 is located at the level of the axis of the aerator 9, and the lower edge above the bottom of the aeration chamber, the partition 11 forms in the chamber aeration two communicating aeration compartments 13 and 14 of a low water level and a higher one created by the aerator 9 having a casing 15; Vertical bridge 2 is installed with the possibility of vertical movement using a screw elevator 16 and is equipped with a visor-gate 17, B camera 4 upstanding, the partition 18 forms a degassing compartment 19, under which the conduit 20 is installed. In the lower part of the chamber 3, the diverting protrusion 21 is placed, the lower window 6 of the partition 2 has a movable transverse plate 22 as a gate, and Pipe 8 - Assembly tray 23.

The area of the bypass window 6 is equal to the area of the slit section between the inclined partition 11 and the visor-shutter 17 at the location of the vertical movable partition 2, and also the area of the slit section between

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the visor-gate 17 and the bottom of the aerofoil at the upper location of the vertical movable partition 2, which is designed in such a way 5 to ensure sufficient flow rates of the sludge mixture for its intensive movement, circulation, involvement of activated sludge from the sump to the aeration zone.

1 (1 The proposed aerotank works as follows,

Sewage liquid. Through the nozzle 7 (FIG. 1, 2) and the distribution tray 10 enters the aeration ot- 15 sec 13 of the lowered water level.

As a result of rotation of the mechanical aerator 9, the sludge mixture moves from the aeration compartment 13 to the aeration compartment 14. In this way, the transversely inclined partition 11, the aeration chamber divided into two smaller aeration compartments, creates more intensive circulation in the chamber and 25 an increased level of the sludge mixture in the aeration compartment 14 as compared with the aeration compartment 13. Such a change. the level repetition provides directional movement of the sludge mixture from one compartment to another through a slit formed by an inclined partition 11 and a visor-gate 17, with the lower position of the vertical movable partition 2 (FIG. 1) or (FIG. 2) through & windows 6, the conical part of the settling chamber and the space between the bottom of the aerotank and the visor-gate 17, taking the direction of the diverting protrusion 21, increasing circulation in the aeration chamber 3 ..

A transverse guide lip 12. mounted in the upper part of the inclined partition 11 on the side of the aeration compartment 13 enhances the circulation effect of the sludge mixture. Between the upper part of the rim 12 and the rotating blades of the aerator 9, a vertical turbulence zone is created, where the mixture discharging from the vanes. aeration chamber. 55 It is a mixture of Figures 1 and 2) from the aeration compartment 14 through the bypass windows 15, passing through the 19 degassing section || enters the settling chamber 4,

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In the settling chamber, the treated wastewater enters the collection tray 23 and is discharged through the nozzle 8 to the aero tank and settled in the conical part of the chamber. 4 sludge under the action of the guided sludge mixture flows From the aeration compartment 14 (Fig. 2), the actor enters the aeration zone consisting of compartments 1 3 and 1 4.

Moving the vertical movable partition 2 (FIG. 1.2) up and down and fixing it in a certain intermediate position leads to a change in the amount of the force mixture coming from the aeration compartment 14 to the aeration compartment 13 through the lower bypass ports 6, which provides regulation active sludge circulation flow to create the necessary optimal operation of the aerotank. At the lower extreme position of the vertical movable partition 2 (Fig.), A small circulation gap remains between the visor and gate 17 and the bottom of the aerotank to eliminate the danger of sticking of active sludge and to ensure the possibility of its continuous flow into the aeration zone in a minimum amount. Removal of excess sludge outside the aeration basin is carried out from the conical part, the settling zone along the pipeline 20,

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The advantage of the proposed device is to intensify the process of mixing the sludge mixture due to the fact that the transverse inclined to the bottom of the bottom wall with a streamline protrusion divides the aeration zone into two aeration compartments and allows you to create in them, for example, a mechanical shedding level difference of the sludge mixture . At the same time, the implementation of a vertical partition separating the aeration zone from the sedimentation zone, mobile, equipping it with a visor-gate, lower overflow windows and an additionally fixed transverse plate allows to change the amount by 1; the equal flow of sludge mixture coming from the airfoil compartment is level in the aero-i.ionny compartment of the lowered level through the conical part of the settling ca -: er. By varying the width of the opening of the lower bypass windows, a different amount of activated sludge is involved in the aeration zone from the settling zone, which ensures active cleaning when changing over a wide range of costs of EFFECTIVE Baud. This is important, for example, when large coefficients Ht:.; PaEHO-- are used for measuring the diversion of water from small settlements and agricultural objects.

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5 g 16

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VNPIPI. Order 3766/24 Circulation 864

Manufacturing, -poligr, pr-tie, Uzhgorod, st. Project, 4

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Claims (1)

AEROTENCY FOR BIOLOGICAL WASTE WATER TREATMENT, containing a reservoir separated by a bridge with sockets to aeration and sedimentation chambers, a dividing wall in the aeration chamber, an aerator, inlet and outlet pipes, characterized in that, in order to increase the degree of wastewater treatment by ensure mixing of the sludge mixture and regulation of the circulating flow of activated sludge, the aerator is installed horizontally at the level of the inlet pipe and close to it, the separation wall is placed in the aeration chamber with a slope ohm in the direction of the aerator, equipped with a flowing protrusion, the upper edge of the partition is located at the level of the axis of the aerator, and the lower one is above the bottom of the aeration chamber, the jumper is installed with the possibility of vertical movement and is equipped with a lower shutter visor.