RU1813737C - Sewage water treatment plant - Google Patents

Abstract

Use: for post-treatment, as well as deep biological wastewater treatment at treatment plants in cities, industrial enterprises and individual facilities. SUMMARY OF THE INVENTION: in an open tank with a layer of filtering charge, a pipe not reaching the bottom is installed along the axis. At the bottom of the pipe and under the loading layer are air dispersants. A cylindrical baffle is mounted coaxially outside the pipe at the top of the loading layer. A water supply pipe is placed in the pipe. The water collection means are in the form of perforated vertical pipes which are located at the periphery of the tank. 2 ill. 00 a CO i4 s Ј

Description

The invention relates to devices for the post-treatment as well as deep biological treatment of wastewater, in particular to filters used at treatment plants in cities, industrial enterprises and individual facilities.

The purpose of the invention is to remedy these drawbacks and improve the quality of cleaning.

The proposed constructive solution allows to significantly simplify the maintenance and operation of the device, expand its scope by eliminating additional equipment and communications located outside the device for regeneration and recirculation, and shutting off the tank, to ensure the maintenance of the aerobicity of the medium in the load volume as a result of air supply through dispersants between internal partitions. The creation of aerobic conditions in the loading volume contributes to the implementation of oxidizing processes by microorganisms that are fixed on the loading surface, which can significantly improve the quality of filtered biologically treated or raw wastewater, not only by trapping suspended solids, but also by oxidizing organic pollution fixed on the loading surface microorganisms, which in the end result increases the efficiency of the device.

With the horizontal movement of the initial liquid from the center to the periphery through a floating load under conditions of its constant movement, a high filter capacity is provided, and the filtering process occurs at a decreasing speed, which helps to improve the quality of purified water. In addition, with the horizontal movement of the initial liquid from the center to the periphery in the columned design of the tank, the filtration area sharply increases, which leads to an increase in the specific productivity of the filter and a significant reduction in the area occupied by the filter, and this is a great advantage of the proposed design.

In FIG. 1 shows a section of the proposed design oxyfiltrator; in FIG. 2 - a fragment of the upper part of the aeration zone. . ;

The device contains an open tank 1, separated along the axis by a pipe 2 not reaching the bottom and a partition 3 into zones of aeration 4, recirculation 5 and filtration 6. The filtration zone is equipped with a charge 7. overflow device 8 located on the periphery of the systems for collecting and discharging purified water 9 and air dispersants 10. Inside the aeration zone, a source water supply pipe 11 is located

idispergator 12. In the conical part of the tank there is a sludge compaction zone 13, and in the bottom there is a pipe 14 for emptying and removing the compacted sludge.

The device works as follows.

Through the pipe 11, water is supplied to the aeration zone 4, where it is aerated through the dispersant 12, is saturated with oxygen. As a result of the expansion of the water-air

5 of the mixture, water overflows through the upper edges of the pipe 2 into the space between the partition 3 and the pipe 2 and then in the form of a continuous guiding flow, the water moves downward through the volume of the filtration zone along the pipe 2. Reaching the lower part

pipes 2, the flow of water turns up and

returns to the aeration zone. So in

the volume of the device is formed by multiple recycling coming to the cleaning

5 water. Saturated with air oxygen, the source water is separated from the recycle stream uniformly over its entire height and, filtered through the charge 7 in the horizontal direction, moves to the perforated pipes 9 vertically located at the side walls, is collected by them and discharged outside the device (uniformity of filtration by the height of the loading layer is provided by the system

5 collection of purified water, in particular a system of hole pipes 9 located with a calculated step over the entire area of the side surface of the tank body 1).

As a result of the fact that the charge density is close to the density of water, during the movement of the recirculation flow, the load is constantly involved in it and thus ensures its constant movement in the entire volume of the filtration zone5. In the area of the partition 3, where there is no exchange between the recirculation flow and the load, the upper edge of the partition 3 is somewhat flooded under the level and through it at the time of overflow

0 of water from the aeration zone into the space between the pipe 2 and the partition 3, the surface loading layer moves into the recirculation flow (Fig. 2} due to the energy of the incident jet.

5 as a result of movement in the volume of the loading filtration zone, the load capacity of the load and its regeneration are increased. Sludge separated from the loading surface is deposited in the conical part of the tank, where it is compacted and then removed under hydrostatic pressure through line 14 outside the device. If additional regeneration of the load is necessary, the purified water drainage line is blocked and when the overflow device is reached, the feed water supply is stopped for 15-20 minutes; / The air supply to the dispersant is turned off 12 m; disperser 10 is turned on. The flow stream, which moves from the upper part of the filtration zone to the aeration zone under the influence of gravity and energy of the flow, enters the conical part of the tank and, after compaction, l of an apparatus.

Maintaining aerobic conditions in the loading volume allows along with. by carrying out the process of clarifying the liquid by filtration, to oxidize the organic pollutants found in the source wastewater by microorganisms that develop and are fixed on the surface of the charge, which leads to a significant increase in the effect of tertiary treatment rio to all indicators.

The design solution of the device makes it possible to use it for direct deep biological treatment of wastewater and use fixed nozzles of the Ershoy or Viev type as a load, which expands the scope of its use and complements its technological advantages over the known design solutions.

Claims (1)

The claims A device for treating wastewater, including an open cylindrical tank with a conical bottom with a filter loading layer, a pipe located on the axis of the tank and a pipe whose upper end is located above the loading layer, pipelines for supplying raw water and for discharging sludge, means for collecting and water drainage installed on the periphery of the tank, characterized in that, in order to improve the quality of cleaning, it is equipped with air dispersers located in the lower part of the pipe and the underlayer of the load, and cylindrical by a septum installed coaxially outside the pipe in the upper part of the loading layer, the water collection means are made in the form of vertical perforated pipes, and the pipeline for supplying the source water is located in the lower part of the pipe. Phi1. 1.