SU1754670A1 - Method and device for biological treatment of sewage - Google Patents

Abstract

Use: purification of liquids from organic pollutants, mainly in the biological purification of household sewage. SUMMARY OF THE INVENTION: The dispersant is pneumatic, and the injection of compressed air into the supply pipe is 1.5-2 diameters before the cut, air is supplied under a pressure of 1.5-3 MPa. New in the device for bio-purification of water is that the bio-nozzle is made of mesh material placed spirally around the axis of the device. The angle of inclination of the generator grid to the horizon is 78-82 °. The device is equipped with a coagulation chamber, the coagulum sludge in which is produced on a coarse load, filling 30-90% of the chamber volume. The filtration chamber is located under the coagulation chamber and fenced from the bottom of the collection and removal chamber of purified water by a high-resistance drain. 2 sec. and 2 z. p. f-ly, 1 ill.

Description

The invention relates to the purification of liquids from organic (biological) and mechanical impurities, mainly the purification of biologically purified household sewage.

A known method of biological wastewater treatment is implemented in the device and includes the dispersion of wastewater through an acoustic emitter (low power) and then - flow flow through the airlift to the cassette bio-plant and then the discharge of purified water (above the cassette bio-pump).

The disadvantage of this method is that stagnant zones are created in the cassette bio-plant, the treated effluent is mixed (partially) with unpurified,

the bio-packing is poorly aerated, which reduces the cleaning efficiency.

The aim of the invention is to intensify the process of biological purification by improving the living conditions of the biomass.

This goal is achieved by the fact that during biological treatment (after-treatment) of sewage, including dispersion of waste liquid (by air, during treatment of the drain), biological treatment and, further, clarification by mechanical filtration, dispersion of waste liquid is carried out at the mouth of the central pipe compressed air introduced into this pipe 1-2 diameters before cutting it under pressure of 1.5 ... 3 MPa; the movement of the drain is carried out by an airlift inside this pipe and, further, through a bionadic 3

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ku, located at an angle of 78 ... 82 to the horizon. The bio-packing (during the runoff movement) is saturated with oxygen from the air (from the bubbling pipes located below).

The known device, which implements the method described above, includes a hydrodynamic emitter of acoustic oscillations, an aerotank with airlift, and a cassette bio-vent.

A disadvantage of this device is the low purification power of the bio-nozzle due to the stagnation zones formed in it and the poor leaching of the excessively formed biofilm. In addition, waste biooxidation products remain in purified water.

The purpose of the invention is to increase the oxidizing power of the bioreactor and increase its reliability.

This goal is achieved in that the device for purification of biologically treated household wastewater includes a bioreactor body, a bio-plant, a water dispersing device, pipelines (supply and discharge), a coagulation chamber, a frame-discharge filter (QPS), and a collection and removal chamber water, as well as a bubbling system for bio-nozzles, a washing system for cleaning up the chemical composition, discharging the washing water and controlling the degree of purification. The bioelectrochement is made in the form of a volumetric net structure (in the form of a truncated cone) made of a polyethylene knotless net, arranged in the form of a series of concentric rings (in plan), with the angle of inclination to the horizon being 78 ... 82.

The device for dispersing water (by means of compressed air), which is the central pipe of the bio-plant, is made in the form of a pipe section running vertically (through the bio-plant), coaxially located inside it a pipe of compressed air ending 1 ... 2 in diameter from the edge of the central pipe . The coagulation chamber is located immediately below the bio-plant, in the area of the wash water trays. КЗФ is filled with a gravel skeleton, and in the lower part - with a sand filtering load; In the lower part of the CSC there is a high-resistance drainage and an air system (part of the water-air system of the CSC washing), as well as a chamber for collecting and discharging purified water. °

The drawing shows a device for biological treatment of wastewater, a longitudinal section.

A device for biological wastewater treatment comprises a housing 1, a pipeline 2 for supplying wastewater, a pipeline 3

compressed air, bioreactor 4, made in the form of a cassetted nozzle from a knotless grid located around its axis at an angle of 78-82 & to the horizon system

perforated compressed air pipelines 5, a coagulation chamber 6 with loading and a coagulum supply pipeline 7, a filtration chamber 8 with a granular load 9 and a high-resistance drain 10, a collection and discharge chamber 11, in addition conical ones are installed between the bioreactor and the coagulation chamber distributors 12 flows, and the chamber of collection and removal of purified water is equipped

pipeline 13 drainage of purified water. Under the pipelines 5 is installed aperture 14 with a central hole. The filtration chamber is a frame-fill filter, the material of which is quartz sand, and the loading structure is as follows:

a) gravel frame, fraction size 40 ... 60 mm loading height 1500 mm.

b) filtering charge

size of fractions 0.8 ... 1.0 mm height of filling 750 mm, c) supporting layers (from the bottom of the KZF:

gravel 20 ... 40 mm-100 mm; gravel 10 ... 20 mm - 100 mm; gravel 5 ... 10 mm - 100 mm; gravel 2 ... 5 mm - 100 mm. The device works as follows.

The water to be purified is fed into the device through pipe 2, and through pipe 3 located therein, compressed air is supplied, which in the lower part disperses the water being purified, mixes with the dispersed water being cleaned and, in the form of a water-air dispersed mixture, falls on the cone distributor 12. This mixture spreads evenly, entrained by the flow of air supplied by the pipeline 5 and the airlift, rises through the bio-junction mesh. Having risen above the bio-nozzle, the water is mainly freed from excess air and by gravity in the form of

thin film on the grid bioeleasing flows down. Then the water enters the coagulation chamber 6, where it mixes with the coagulant entering through the pipeline 7, is distributed by a cone distributor 12 along

5 the entire volume of the coagulation chamber, while the suspension settles on the load 9, and the purified water flows by gravity into the filtration chamber and, filtering through the granular load, through the drainage 10 high

resistance enters collection chamber 11

and discharging purified water from where it is discharged through line 13.

The use of the proposed method and device allows to intensify the process of bioremediation by increasing the oxidizing power of the bioreactor, improving the conditions for the functioning of the biomass. The use of biotreatment, coagulation, and filtration in a single housing improves the reliability of cleaning and allows the use of a device for the purification of wastewater with reduced dimensions.

F o rm ula invention

Claims (4)

1. A method of biological treatment of wastewater, including the supply and dispersion of wastewater with air / biological treatment and clarification, characterized in that, in order to intensify the process of biological treatment by improving the living conditions of biomass, dispersion of wastewater is carried out by compressed air under pressure of 1.5 ... 3.0 atm, and after biological treatment of water it is deaerated. 2, A device for biological wastewater treatment, comprising a housing, a bioreactor with a nozzle, a device for wastewater dispersion, compressed air piping, feed - “ ttl ll a, p v b v water and removal of purified, differs from the fact that, in order to increase the oxidizing power of the bioreactor and increase the reliability of the device, it is equipped with perforated pipes located under the nozzle for supplying and distributing compressed air and a diaphragm with a central opening installed under them, a coagula chamber contamination with a coagulant supply pipeline, a filtration chamber and a chamber for collecting and discharging purified water, while the nozzle is made of a mesh material located along helix around the axis of the housing with an angle of inclination of the spiral forming 78-82 ° to the horizontal, the dispersing device is made of a vertical pipe connected to the pipe line of the initial wastewater with a compressed air line located along its axis, and the pipe of the discharge of purified water is attached to the bottom body parts. 3. The device according to claim 2, wherein the coagulation chamber is provided with a loading density of more than 1 kg / m and fractions of 40-60 mm. 4. Device on PP. 2 and 3, that is, that the filtration chamber is made in the form of a frame / charge filter with a gravel frame and filter bed and supporting layers. - / 2 -9