SU814892A1 - Station for biological purification of domestic wastes - Google Patents

Description

Union of Soviet Socialist Republics

USSR State Committee for Inventions and Discovery

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE (61) Additional to author. certificate-wu (22) Declared 02.0 2.79 (21) 2720024 / 29-26 with the addition of application No. (23) Priority

Published on 230 3.81. Bulletin No. 11

Date of publication of the description 25.0 381 <. "814892 (51) M. Cl. ³

C 02 F 3/30 (53) UDC 628.356 (088.8) (72) Author of the invention

V.V. Golubev.

(71) Applicant

Leningrad Scientific-Production Association Pigment (54) STATION FOR BIOLOGICAL CLEANING OF DOMESTIC WASTE

The present invention relates to the treatment of domestic wastewater and can be used for the sewage system of small villages, boarding houses, holiday homes and individual housing estates. A known station for the biological treatment of domestic wastewater containing primary settling chambers, aeration tank, digester and secondary sump [1]. ⁰

A disadvantage of the known device is cumbersome, and is characterized by high costs of building materials.

'The aim of the invention is to increase the efficiency of using 3c ^ by reducing the size and ensuring the compactness of the station.

This goal is achieved by the fact that the station is equipped with a non-reaching 20 • vertical partition to the bottom of the aeration tank, and partitions between the aeration tank and the secondary sump and. aeration tanks and digesters are performed at an angle of 45 ° to the horizontal and 25 at an angle of 90 ° to each other. In addition, the station is equipped with a septic tank with a water separation pipe and an overflow wall separating the septic tank from the flotation chamber, while the inlet-30 hole of the pipe is equipped with a filter membrane of two layers of a polypropylene filter film.

The drawing shows a station, a cross section.

The station contains an iodine pipe 1, a combined flotation chamber, preliminary aeration and primary sedimentation, a system of hole pipes 3, an aeration tank 4, a secondary sump 5, a catchment channel b located in a sump 5, and a digester 7. There is a pipe in the upper part of the aeration tank 8 for gas outlet. Through the overflow wall from the combined chamber 2, a septic tank 9 is placed with a water separation pipe 10 and a pipe for draining water. The holes in the water separation tube are equipped with membranes 11 made of two layers of filter polypropylene fabric.

The station operates as follows.

Sewage liquid is passed through pipe 1 to chamber 2, where preliminary aeration and flotation takes place due to the excess supply of air or technical oxygen through a system of hole pipes 3. Air bubbles; rising up, entrain particles of floating suspensions, which contributes to the destruction of solid particles due to the cavitation effect. The foam formed on the surface of the flotation chamber 2 is poured into the septic tank 9 for sludge and prolonged fermentation. Water is separated from suspensions by a filtering membrane 11 and. through the pipe it goes back to the sewer. Heavy solid particles are carried away by the fluid flow and gravity to the bottom of the flotation chamber and then to the digester 7, where sediment accumulates, pre-compaction due to hydrostatic pressure and its fermentation.

. In the aeration chamber 4, sediment flakes are formed due to the mineralization of organic substances and the liquid is enriched with oxygen to the required biochemical oxygen consumption (MIC). The sediment flakes and excess activated sludge along the inclined bottom of the aeration chamber 4 slide into the digester 7. Air or oxygen flow supplied through a system of hole pipes 3 to the bottom of the aeration chamber, it promotes mixing of activated sludge and waste fluid, and improves the quality of cleaning. After aeration, the waste fluid rises into the sump 5, where • formation of activated sludge and final clarification of the waste fluid takes place. Active sludge along the inclined bottom of the sump 5 slides into the aeration chamber 4, by gravity under the influence of gravity, and the clarified liquid through the filter membrane enters the catchment tray 6 and then for disinfection and discharge into the pond. To release gases from the aeration chamber 4 and the digester, a pipe 8 is provided, and from the septic tank 9 and the flotation chamber 2, gases exit through the free surface, contributing to the destruction of the crust.

To improve the cleaning and fermentation processes, it is possible to supply reagents, coagulants and catalysts to a septic tank 9, a chamber. 2 flotations and sedimentation tank 5 through a c-free surface.

The dimensions of the station are essential and should be determined by calculation depending on the military-industrial complex and plant productivity according to well-known formulas and norms.

The proposed device has the advantage that, with relative compactness, it provides good cleaning quality due to the separation of suspended particles in the flotation chamber and thereby providing the possibility of differentiated selection. reagents, catalysts and coagulants to intensify the processes of fermentation, precipitation and oxygen enrichment of wastewater before release into water bodies.

Claims (2)

The present invention relates to the treatment of domestic waste water and can be used for the sewage system of small villages, boarding houses, holiday homes and individual neighborhoods. A station for biological treatment of domestic wastewater is known, which contains primary settling chambers, an aero tank, a digester and a secondary clarifier 1. A disadvantage of the known device is cumbersome and is characterized by high costs of building materials. The aim of the invention is to increase the effectiveness of the use of 3 by reducing the size and the compactness of the station. This goal is achieved by the fact that the station is supplied with a vertical partition not reaching the bottom of the aerotank, and the partitions between the aerotank and the secondary settling tank and. the aeration tank and the digester are made with an angle of 45 ° to the horizontal and an angle of 90 ° to each other. In addition, the station is supplied with a septic tank with a water separation pipe and an overflow wall separating the septic tank from the flotation chamber, while the inlet of the tube is supplied with a filtering membrane of two layers of filter polypropylene film. The drawing shows a station, a cross-section. The station contains a delivery pipe 1, a combined flotation chamber, pre-aeration and primary settling, a perforated pipe system 3, an aerotank 4, a secondary settler 5, a catchment tray 6 located in the settling basin 5, and a digester 7. There is a tube 8 in the upper part of the nitrogen tank for gas outlet. Through the overflow wall from the combined chamber 2 is placed a septic tank 9 with a water separation pipe 10 and a pipe for draining water. The holes in the drainage pipe are equipped with membranes 11 made of two layers of filter polypropylene fabric. The station operates as follows. Sewage fluid through pipe 1 is fed to chamber 2, where pre-aeration and flotation take place due to excessive supply of air or technical oxygen through a system of perforated pipes 3. Bubbles raise the air and carry particles of floating sediment, which contributes to the destruction of solid particles behind the cavitation effect. Penetration, formed on the surface of the flotation chamber 2, is poured into a septic tank 9 for sludge and prolonged fermentation. Water is separated from the slurries by the filter membrane 11 and. The pipe 10 is sent back to the sewage. T yellow solids are entrained by the flow of liquid and gravity to the bottom of the flotation cell and then to the digester 7, where accumulation of residual matter occurs, pre-compacted by hydrostatic. pressure and fermenting it. In the aeration chamber, flocculent sedimentation takes place due to mineralization of organic substances and the enrichment of the liquid with oxygen to the required biochemical oxygen consumption (MIC). air or oxygen supplied through the perforated pipe system 3 to the bottom of the aeration chamber — promotes the mixing of activated sludge and waste liquid and improves the quality of cleaning. After aeration, the waste liquid rises into a sump 5, where active sludge is formed and the final clarification of the waste liquid occurs. Active sludge on the sloping bottom of the sump 5 slides into chamber 4 aeration, by gravity under the action of gravity / a clarified fluid through the filtering membrane 11 enters the catchment tray 6 and further to disinfection and release to the reservoir. To release the gases from the aeration chamber 4 and the digester 7, a pipe 8 is provided, and from shop 9 and the flotation chamber 2 the gases exit through the free surface, contributing to crust destruction. To improve the cleaning and fermentation processes, the supply of reagents, coagulants and catalyst to septic tank 9, the chamber is possible. 2 flotation and sump 5 through the c-free surface. The dimensions of the station are significant and should be determined by calculation depending on the MIC and the station's performance using known formulas and norms. The proposed device has the advantage that, with relative compactness, it provides good cleaning quality due to the separation of suspended particles in the flotation chamber and thereby providing the possibility of differentiated selection. reagents, catalysts and coagulants to intensify the processes of fermentation, sedimentation and oxygenation of wastewater before release into water bodies. Claim 1. Biological treatment plant for domestic wastewater, containing primary settling chambers, aeration tank, digester and secondary sedimentation tank, characterized in that it is equipped with a vertical partition that does not reach the bottom of the aeration tank in order to increase the efficiency of use by reducing its size and ensuring compactness. , and the partitions between the aeration tank and the secondary settling tank and the aero tank and the digester are made at an angle of 45 to the horizontal and at an angle to the other. 2. Station of claim 1, characterized in that it is provided with a septic tank with a water separating pipe and an overflow wall separating the septic tank from the primary sludge chamber, while the inlet of the separating pipe is provided with a filter membrane of two layers of filter polypropylene fabric. Sources of information taken into account in the examination 1. Wastewater treatment. Experience of foreign construction, vol. 11, M.f Gosstroyizdat, 1963, p. 12, fig. 12.