SU1721028A1 - Unit for leaning sewage and natural water - Google Patents

Abstract

The invention relates to a biological, bioreagent, and physicochemical treatment of wastewater and natural waters, and is intended for use in sewage treatment plants and water supply systems for cities and industrial enterprises. The aim of the invention is to increase productivity and operational efficiency and to expand the range of effective application. The essence of the invention is that the installation is divided into vertical columns, including a centrally located aeration chamber, equipped with a device for preparing and metering reagents, and a system of multi-colored lighting chambers equipped with full-height inclined partitions attached to the body at an angle with the formation of dihedral angles and gap gaps between the lower ends of the partitions, the assembly cups and the pipes in the upper and lower parts, which connect them to the aeration chamber, while the aeration chambers and and clarifications have conical bottoms, the bottom of which is made either at one mark or with a drop. 2 Il. fe

Description

The invention relates to biological, bioreagent and physico-chemical treatment of waste and natural waters and is intended for use in sewage treatment plants and water supply of cities and industrial enterprises in a wide range of productivities.

The aim of the invention is to increase the productivity and efficiency of the plant, to expand the range of effective use due to multipurpose use, increasing the total filter surface of the suspended layers and improving mass transfer.

FIG. 1 shows the installation, cross section; in fig. 2 - the same in terms of.

The installation is made of vertical columns, of which the aeration chamber 1 is located in the central one, and the others have many brown light 2 cameras. An aeration chamber 1 is provided in the upper part with a device 3 for preparing and metering reagents, equipped with a jet aeration system communicating with it in the upper and lower parts through an ejector 4, a pump 5, VSAXI N

About S 00

flow and pressure pipelines b and 7. The aeration system includes a recirculation tubular box 8 installed in the aeration chamber 1 and a channel 9 connecting the ejector 4 to the box 8. The lower end of the channel 9 is buried in the sublevel of the liquid. The aeration chamber 1 can be equipped with a jet or pneumatic aeration system located either at the bottom or at an incomplete depth of the aeration chamber. The unit 10 for supplying the purified liquid is placed in the upper part of the device 3 for the preparation and dispensing of reagents.

In the clarification chambers 2, transverse partitions 11 are installed, attached to the body at an angle with the formation of dihedral angles and slotted gaps 12 between the lower ends of the partitions. The clarification chambers 2 are equipped in the upper part with collecting bowls 13 of purified water and pipelines 14 and 15 in the upper part and the lower part connecting the illumination chambers 2 with the aeration chamber 1. The pipelines 14 are equipped with gates 16.

The transverse partitions 11 divide the clarification chambers 2 over the entire height into separate channels 17 communicating through slit gaps 12. The clarification chambers 2 using the transverse partitions 11 are divided into compartments 18, 19 and 20 of degassing, recirculation, suspended layer for separating the aqueous mixture . Under partitions 11 in each tusk there is a pipeline 21 for draining purified water into a collection bowl 13. In the lower part of the aeration chamber 1 a unit 22 for disposal of excess activated sludge is located.

The installation works as follows.

The pipeline of the unit 10, the crude waste liquid enters the device 3 for preparing and metering reagents, mixes with the reagents and is fed into the aeration chamber 1, where it is mixed with activated sludge under conditions of aeration with air sucked through ejectors 4 and fed through channels 9 to depth into the recirculation tubular box 8. Rapid mixing of waste fluid with activated sludge and air saturation with air occurs as a result of intensive recirculation through the tubular duct 8.

The oxygen-saturated sludge air through the pipelines 14 enters the clarification chambers 2 into the degassing compartment, where air bubbles are separated. From the degassing compartment of the silt, the mixture enters the recycling compartment 19, moves from top to bottom;

the gaps 12, and then through the pipe 15 returns to the aeration chamber 1.

Thus, due to the difference in density of the air-water mixture in chamber 1

Aeration and liquids in the clarification chambers 2 between the aeration chamber 1 and the clarification chambers 2 are established by the directional multiple recycling.

In addition to the exchange between the aeration chambers

and clarification and saturation of the volume of the clarification chamber with the recirculation flow in the expanding spaces between the surfaces of the nplonal partitions in each

Rousse suspended (fluidized) layers of activated sludge. Removal and oxidation of contamination occurs throughout the entire volume of the installation occupied by the sludge, and the clarification of purified water occurs simultaneously with its

filtering through weighted layers of activated sludge.

Thus, the unproductive stage of the purification process for separating sludge from purified sedimentation water is eliminated.

The purified water is collected over the surfaces of the suspended layers by autonomous pipes 21 and is discharged into a collection bowl 13 and further removed from the installation.

The assembly of the collecting bowl 13 ensures the uniform removal of purified water from each tier. Excess sludge is removed through conduit 22. Reagent is fed through conduit 23.

The equipment in the proposed installation of the clarification chamber with transverse partitions allows, while maintaining the existing linear dimensions of the clarification chamber, to increase its productivity by 2 times, and with an increase in the number of clarification chambers to two, without changing the height, the installation capacity increases by 4 times, as the number of cameras increases to four - installation performance

will increase accordingly by 8 times due to a proportional increase in the total surface of suspended layers of activated sludge. It also achieves an improvement in the efficiency and quality of the plant.

as a result of a decrease in the hydraulic load on the surface of suspended layers of activated sludge, as well as a more complete utilization of the kinetic energy of recirculation streams forming from two

The sides of the stream are weighted layers of active sludge.

The increase in the number of clarification chambers improves not only the quality of water purification, but also the reliability of the plant as a whole.

The equipment of the plant with a device for preparing and metering a solution of reagents makes it possible to expand the range of its effective use for the bioreactor and physicochemical method of treating waste and natural waters. The introduction of a coagulant solution into the aeration chamber allows to intensify the processes of biological treatment of wastewater and the separation of the sludge mixture by creating coagulation centers and improving flotation and sedimentation properties of activated sludge. This allows the installation to be used for wastewater not subjected to direct biological treatment. At the same time as the above-mentioned advantages, the depth of the cleaning process for the removal of organic pollutants expressed by biochemical oxygen demand (MIC) and chemical oxygen demand (COD) increases.

The facility is also intended for direct physico-chemical treatment of wastewater from natural waters. Aluminum sulphate, ferric chloride, polyacrylamide or other coagulants and flocculants, and their combinations can be used as coagulants. The dose of the coagulant solution varies over a wide range depending on the purpose of the installation, the type of treated water, the composition, the concentration of contaminants and the requirements for the quality of the purified water.

In the case of the installation for direct physico-chemical treatment of waste and natural waters, the aeration chamber is used as a flotation chamber and mixing solution.

coagulant with water and circulating the water to be purified between the flapping chamber and the drying and clarification chambers and forming suspended layers to separate the purified water from the sludge.

Claims (1)

The application of the proposed plant allows reducing the amount of air supplied to aeration by 2-2.5 times and reducing energy consumption by 5-6 times, increasing the reliability and efficiency of its work. The formula for cleaning waste and natural water comprising a housing with aeration and clarification chambers, separated by vertical and inclined partitions, supply units for the initial and removal of purified liquid and excess sludge, aeration and circulation systems, in order to increase productivity and efficiency efficiency, expanding the range of effective use due to multipurpose use, increasing the total filtering surface of suspended layers and improving mass transfer, the installation is made of vertical columns, of which the aeration chamber is located in the central chamber, and the rest are illuminated, the aeration chamber is equipped. and metering of the reagents, and the clarification chambers - prefabricated cups with pipelines connected to the aeration chambers; inclined partitions are installed in chambers O vetleni and their lower ends form a slotted gaps bottom aeration and clarification chambers are conical and are interconnected. Sh I eight vQ " 8201211 FIG. g