RU1801952C - Device for treatment of sewage - Google Patents

Abstract

SUMMARY OF THE INVENTION: a device includes a housing with inlet pipelines for wastewater, air-water mixture, air, and outlet pipelines for treated water and sludge. The housing is divided by a cylindrical-conical partition into biooxidation, flotation and sedimentation chambers. Wastewater is fed from above into the biooxidation chamber under aeration conditions. Wastewater is subjected to bio-treatment, flotation, filtration through a layer of activated sludge, and settling. The purified water from the settling chamber through the water-lifting pipes enters the collection tray and is discharged from the device. 1 ill.

Description

The invention relates to devices for the complete biological treatment of domestic and similar wastewater composition.

The aim of the invention is to increase the efficiency of wastewater treatment, reducing the volume and time of wastewater treatment.

The drawing shows a diagram of a device for wastewater treatment. The device consists of a housing 1, a coaxial cylinder-conical partition 2, the upper edge of the conical part of which is adjacent to the inner wall of the housing. The partition 2 forms inside the body 1 of the chamber 3,4,5 biooxidation, flotation and sedimentation, respectively. The upper part of the housing 1 is equipped with a drainage chute 6 with a discharge pipe 7. The treated wastewater is supplied via a pipe 8. An aerator 9 is placed in the biooxidation chamber 3. An air supply and distribution unit 10 is placed in the flotation chamber 4. The settling chamber 5 is in communication with the risers 11c with the drainage chute 6. At the bottom of the chamber 5 there is a sludge discharge pipe 12.

The device operates as follows. Wastewater flows through pipeline 8 to the upper part of the biooxidation chamber 3, where they are mixed with activated sludge and biologically treated under aeration conditions. Foaming on the surface of chamber 3 is carried out by a stream of wastewater supplied from above.

The sludge mixture from the chamber 3 is lowered down and enters the flotation chamber 4. Under the action of the oncoming flow of finely dispersed air, the sludge floats in the form of a suspended layer and accumulates in the upper part of the flotation chamber 4. The suspended sludge layer acts as a filter. The wastewater pre-treated in the biooxidation chamber 3 is filtered through a sludge layer in the flotation chamber 4 and enters the settling chamber 5. Next, the purified water through pipes 11 rises to the drainage

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tray 6 and pipe 7 is removed from the device. The non-floatable precipitate that has fallen to the bottom of the settling chamber 5 is discharged through line 12.

Reliable operation of the device is ensured by the uniform distribution of the air-water mixture in the flotation chamber 4, as well as by the difference in the velocities of the downward flow of liquid and the upward flow of finely dispersed air. The flotated sludge rising above the aerator 9 is crushed by larger air bubbles, and then, due to circulation, again enters the flotation chamber 4.

The proposed device, combining biological treatment, sludge separation and filtration of wastewater in a single building, occupies a small area due to vertical arrangement, and allows wastewater treatment at high to /

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storage, which reduces the volume of structures and cleaning time.

Claims (1)

SUMMARY OF THE INVENTION A wastewater treatment device, comprising a housing divided by a coaxial baffle into biooxidation, flotation and sedimentation chambers, air / water supply and waste water supply units, a purified liquid collection tray with a discharge pipe, characterized in that, in order to increase the cleaning efficiency , the device is equipped with an aeration system located in the biooxidation chamber, a wastewater supply unit located above the biooxidation chamber, the coaxial partition is cylindrical-conical, abutting the upper edge to the body of the device is provided with a settling chamber pump string, connecting the collecting tray with its cleaned liquid.