SU1528743A2 - Apparatus for biochemical treating of waste water - Google Patents

Abstract

This invention relates to the biochemical treatment of wastewater, characterized by fluctuations in the flow rate and organic matter content. The purpose of the invention is to increase the efficiency of the separation of the biofilm from the treated water. The device consists of a cylindrical housing 1 with a floating load 2 of granulated polymer material, a coaxial settling chamber 3 with settling with purified water pipeline 12, a mineralization chamber 9, a cylindrical partition 8 located between the walls of the housing 1 and a settling chamber 3, reactive sprinkler 11 raw sewage , a jet aerator 14 installed along the axis of the body above the loading surface of the pump 13 with a recirculation pipe. In order to increase the efficiency of biofilm separation from purified water, the bottom of the settling chamber 3 is made in the form of a reverse cone, which forms an annular gap with the cylindrical shell and a recirculation pump connected to the suction nozzle by a pipeline. This improves the hydraulic conditions of the settling chamber and the aggregation of biofilm particles. 2 Il.

Description

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This invention relates to a biochemical treatment of wastewater, characterized by fluctuations in the flow rate and the content of organic substances.

The purpose of the invention is to increase the efficiency of the separation of biofilms from purified water.

Figure 1 shows the device, a longitudinal section; figure 2 - section aa in figure 1.

The device contains a cylindrical body 1 with a floating load 2 of granular polymer material, a settling chamber 3 made of a cylindrical shell 4 with a conical overlap 5. The bottom of the settling chamber 3 is made in the form of a reverse cone 6 forming with the lower edge of the cylindrical shell 4 of the settling chamber an annular slot 7. A cylindrical partition 8 is located between the walls of the housing 1 and the upholding chamber 3 in the load 2. ralization. Untreated wastewater is supplied through conduit 10 through irrigator 11, purified water is withdrawn through conduit 12, the inlet end of which is located under the conical overlap 5 of chamber 3. The device has a circulating conduit with a pump 13 and a jet aerator 14 installed along the axis of the housing 1 above loading 2 and also a pipeline 15 connecting the bottom of the settling chamber with the suction port of the pump 13.

The device works as follows.

Untreated sewage through the pipes 10 enters the jet irrigator 11 and is evenly distributed over the surface of the load 2. As the waste water flows through the load under the influence of microorganisms of the biofilm attached to the surface of the granules, organic substances in the colloidal and dissolved the form. In order to separate the biofilm from the purified water, through the annular gap 7, the flow rate to chamber 3 is equal to the flow of untreated wastewater. In this case, the recirculation flow rate passes between the conical part of the housing 1 and the bottom of the chamber 3, which improves the process of aggregation of biofilm particles

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and improves the hydraulic conditions of the settling chamber. The process of purification and mineralization of the biomass in the mineralization chamber 9 is completed. The clarified wastewater is discharged from the device through conduit 12, and the settled biofilm through conduit 15 enters the suction port of the recirculation pump 13 and, together with the recirculation flow, is fed to the jet aerator 14. The air recirculation saturated with air in the jet aerator recirculation flow together with the biofilm 2 enters the top of the conical overlap 5 of the settling chamber and is distributed over its surface in the form of an annular flow of variable cross section. In the volume between the walls of the cylindrical part 8 and the overlap 5 of the settling chamber due to a hydraulic jump that occurs when the moving overlapping of the recirculation flow against the surface of the water mates, additional aeration and circulation of the load occur in the direction indicated by the arrows in FIG.

Regeneration and circulation of loading is carried out as follows.

During the movement of treated wastewater and recirculation flow in a constricted annular section between the cylindrical partition 8 and the shell of the settling chamber 3, the load is diluted and transported to the zone between the walls of the housing 1 and the cylindrical partition 8, as well as washed in a turbulent flow. In this zone, due to the buoyancy force of the regenerated load, its level rises, and it, falling over the upper face of the cylindrical partition 8, falls into the upper part of the device. The required degree of regeneration of the load and the intensity of aeration of the load are directly dependent on the amount of contaminants entering the device with the wastewater and are regulated by the flow of the recirculation pump 13.

The proposed device allows increasing the efficiency of biofilm separation from purified water by improving the aggregation process of particles, biofilm and improving the hydraulic working conditions of the settling chamber, especially when treating wastewater with high concentrations of contaminants, which requires large recirculation costs through a jet aerator.

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A device for biochemical cleanup and that in order to increase the efficiency of biofilm separation from purified water, the settling chamber is provided with a bottom in the form of a reverse cone, positioned to form an annular gap with a lower edge of a cylindrical shell and connected to the wastewater suction unit according to the autonomous system. No 1308567, with a circulating pump

1528743

excellently so that, in order to increase the efficiency of biofilm separation from purified water, the settling chamber is provided with a bottom in the form of a reverse cone placed with the formation of an annular gap with a lower edge of a cylindrical shell and connected to the suction side

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Claims (1)

Claim Device for biochemical wastewater treatment according to auth. No. 1308567, characterized in that, in order to increase the efficiency of separating biopleics from purified water, the sedimentation chamber is provided with a bottom 5 in the form of a cone, placed with the formation of an annular gap with a lower edge with a cylindrical shell and connected to the suction pipe of the circulation pump.