SU1736953A2 - Plant for waste water treatment - Google Patents

Abstract

This invention relates to the treatment of domestic and industrial wastewater. The purpose of the invention is to increase the efficiency of wastewater treatment and reduce the energy intensity of the cleaning process. To achieve the goal, a wastewater treatment plant. containing a biological pond with aeration, water supply, drainage and sludge systems, settling and agitator compartments, equipped with removable bridges separating the biological pond from the settling compartments, and also an overpass with lifting and transport mechanisms located above them. 2 Il.

Description

The invention relates to a combined plant for the treatment of wastewater containing organic contaminants using the processes of bio-oxidation and sedimentation.

A wastewater treatment plant is known, which contains a biological pond tank with artificial aeration systems, water supply, water and sludge drainage, a sedimentation unit and process piping, the pond reservoir being connected to the sludge duct by pipeline, and the sedimentation unit is designed as compartments in the reservoir of the pond, equipped with dams, longitudinally located in the reservoir and adjacent to one of the walls, as well as with agitators installed along the longitudinal axis of the compartments.

The wastewater aerated in the biological pond enters the settling compartments, in which the suspended particles fall to the bottom and the purified water is discharged. After accumulation of sediment in the compartment, the removal of purified water is stopped, the precipitate is stirred up with water with the help of agitators, and the resulting mixture is sent to a desilter.

A disadvantage of the known construction is that the tank of the aerated biological pond and the settling compartments are made in the form of a single container. As a result, when the accumulated sediment is agitated in one of the compartments for pumping to the seed compactor, a part of this mass falls due to the influence of turbulence in the aerated biological pond and in the adjacent compartments contaminated with purified or already purified water, which reduces the efficiency of the facility.

As a result of turbulence, the pumping compartment can leave up to 10% of the mass stirred up. In addition, when pumping out the agitated sediment, up to 10% of the water from the biological pond can be pumped out with it, as there is a direct hydraulic connection, as a result of which the pumping time increases (L

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The purpose of the invention is to increase the efficiency of wastewater treatment and reduce energy consumption.

The goal is achieved by the fact that the biological pond is separated from the settling compartments by removable bridges, above which is an overpass, equipped with mechanisms for their lifting and moving.

Figure 1 shows the proposed construction; FIG. 2 is a section A-A in FIG.

The construction includes a biological pond tank 1, a water supply pipe 2, aerators 3, a device for settling divided by dams 4 into compartments 5, 6 and 7, agitators 8, weirs 9, pipe 10 and valve 11 for draining purified water, pipe 12 and valve 13 to remove the turbid sediment, and Packers or sludge ponds 14, pipeline 15 for clarified water and pipeline 16 for compacted sludge. The settling compartments 5, 6, and 7, if necessary, are separated from the biological pond 1 by bridges 17, above which is an overpass 18, equipped with mechanisms 19 for lifting and moving the bridges 17.

The construction for wastewater treatment works as follows.

The waste water to be cleaned, fed through conduit 2 to biological pond 1, is aerated with aerators 3 that saturate the sewage with oxygen and prevent suspended solids from sedimentation, and after oxidation of organic contaminants into the compartments 5. 6 and 7, in which suspended solids fall to the bottom, and purified water is discharged through the weir 9, pipeline 10 with a valve 11.

As the sediment accumulates in one of the settling compartments, for example in compartment 7, the drainage of purified water is stopped, e. overlap the slide 11. The compartment 7 is separated by a jumper from the biological pond. Then, by means of mixers 8 in compartment 7, sediment is stirred up with water, valve 13 is opened and the resulting mixture (turbid precipitate) is sent to a desilter 14.

From the sludge compactor, the clarified water is directed through conduit 15 back to the biological pond. The compacted sludge from the sludge compactor is sent for disposal or disposal, the sludge is not removed from the sludge accumulator, but remains in it. After removing the agitated sediment, the agitators are stopped and the gate valve 13 is closed. Jumper 17 is removed using mechanism 19 located on ramp 18. In this case, aerated waste water from biological pond 1 enters the compartment. After a few hours, it is necessary to clear the water in the compartment and reopen the valve 11 on the pipe 10 for removal of purified water. Alternately, similarly to that shown for compartment 7, sludge is removed from all other sections. The sediment removal operation is repeated as it accumulates.

Mixers can be installed both permanently on supports and afloat (on pontoons).

FIG. 1 compartments for settling are placed at the end of the aerator pond, however, if there are significant amounts of suspended solids, it is possible to place the latter not only at the end, but also at the beginning, as well as at the end, and at the beginning of the pond.

The positive effect from the use of the proposed facility is to increase the efficiency of wastewater treatment by more completely removing suspended particles, and also by eliminating the stirred-up mixture in the exhausted purified water, by shortening the pumping-out of the stirred sediment from the settling compartment by eliminating its dilution with water. biological pond and thereby reducing energy consumption for the pumping process.

Claims (1)

Invention Formula Facility for wastewater treatment by auth.St. No. 916433. characterized in that, in order to increase cleaning efficiency and reduce energy costs, it is equipped with removable bridges separating the biological pond from the settling compartments, as well as overpasses with bridges raising and moving mechanisms above them. /BUT Mmmmmmm / X 4 Tips 1 and D  In /////,