SU1308567A1 - Device for biochemical purifying of sewage - Google Patents

Abstract

This invention relates to the biochemical purification of waste water, characterized by fluctuations in the flow rate and organic matter content. The purpose of the invention is to increase the oxidizing power by increasing the efficiency of aeration and regeneration of the load. The device consists of a cylindrical housing 1 with a floating load 2 of granulated polymer material, a coaxially arranged settling chamber 3 with a purified water pipeline, a mineralization chamber 7, a cylindrical partition 6 interposed between the walls of the housing 1 and the settling chamber. The jet aerator 12 is installed along the axis of the device above the loading surface and has a pump 11 with a circulating pipe 10. The source water through line 8 through the sprinkler 9 is fed to the load, which also receives recirculation flow saturated with air in the jet aerator 12. Circulation and aeration of the loading are carried out by the action of the jets of the initial liquid and the recirculation flow rate. 2 Il. oe about 00 joint venture

Description

one

The invention relates to wastewater treatment, in particular to combined devices for the biochemical treatment of concentrated organic pollutant wastewaters, characterized by fluctuations in the flow rate and organic matter content.

The aim of the invention is to increase the oxidizing power of the device by increasing the efficiency of aeration and regeneration of the load.

FIG. 1 shows a device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The device contains a cylindrical housing 1c with a floating load 2 of granulated polymer material, a settling chamber 3 located in the load and made of a cylindrical shell 4 with a conical overlap 5. Between the walls of the housing 1 in the load 2 and shell 4 there is a cylindrical partition 6. At the bottom Parts of housing 1 under the settling chamber are located chamber 7 of mineralization. The source water is supplied through conduit 8 through irrigator 9, purified water is withdrawn through the conduit, the inlet end of which is located under the conical overlap 5 of the sedimentation chamber 3. The device has a circulation pipe 10 with a pump 11 and a jet aerator 12 installed along the axis of the housing above the load 2.

The device works as follows.

Untreated sewage water through the pipeline 8 postpones into the jet irrigator 9 and is evenly distributed over the surface of the load 2. When the flow of waste water through the load under the influence of microorganisms biofilm attached to the surface of the granules, the organic substances in the colloidal and dissolved the form. The process of purification and mineralization of biomass in mineralization chamber 7 is completed. The separation of purified water and biofilm occurs in the settling chamber 3. The biofilm that is separated from the charge is collected in the conical part of the housing 1 and, together with the recirculation flow rate of the pump 11, is fed to the jet aerator 12. The crushing of the biofilm, which occurs during the aeration process, improves the conditions of diffusion of oxygen and substrate to bacteria.

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and thus increases the rate of oxidation of contaminants. The recirculation flow, saturated with air in the jet aerator 12, is fed through the load 2 to the top of the conical overlap of the settling chamber 3 and distributed over its surface in the form of an annular flow of variable cross section. In the volume between the walls of the cylindrical surface of the partition 6 and the conical part of the settling chamber 3, due to the hydraulic jump that occurs when the recirculating flow moving along the surface of the cone with the water surface, additional aeration and circulation of the load occurs in the direction indicated by arrows (Fig. 1 ). Such circulation of the charge contributes to the intensification of mass-transfer processes in the load and fluid, prevents the formation of stagnant zones when the load is recirculated through the partition 6 in the downward-upward direction and thereby improves its regeneration.

The recirculation and regeneration of the feed is carried out as follows. When the treated water moves and the recirculation flow rate in the constricted annular Section between the cylindrical partition 6 and the cylindrical part of the settling chamber 3, the load is diluted and carried to the area between the walls of the housing 1 and the cylindrical partition 6, and it is washed out of the excess biofilm in a turbulent flow . In this zone, due to the pushing force of the regenerated load, its level increases and, over the top of the cylindrical partition 6, it 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 circulation pump 11.

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The proposed device allows 55 to significantly intensify the process of biochemical purification, to ensure the stability of work at variable overloads, is compact and easy to operate.

31308567

11 1) and m e p. . To conduct pilot tests on the territory of the sewage treatment plant of the flax plant, a plant of the proposed design was constructed; domestic and domestic sewage of the city that has been pre-treated in a sand trap and fiber catcher. Foamed granular polystyrene was used as a load. Plant capacity 120. Waste water

Claims (1)

Apparatus of the Invention A device for biochemical treatment of wastewater, comprising a cylindrical body with floating loading, settling and salinization chambers, a feedwater supply pipeline with sprinkler and a pipeline for discharging purified water, in order to increase the oxidizing capacity of the device by increasing the efficiency of aeration and regeneration of the load, the settling chamber is made of a cylindrical dachBPU 216 gull with a conical overlap and the coaxial but in the body, in the inlet, the inlet end of the pipeline for the removal of purified water is located under the conical overlap of the settling chamber, the device is equipped with Lee: COD 442-536 mg 282 mg / l; suspended solids 232–370 mg / l; after purification - COD 43- 56 mg BOD 9-11.4 mg suspended solids 8-14 mg / l. The oxidizing power of the facility is 4.3–5.8 kg COD / m day with an average biomass concentration of 13 g / l, the biomass stabilization time is 6–10 days, the aeration efficiency is 3.2 kg 02 / kW h. 20 coaxially in the case, in the load between the walls of the case, and the settling chamber, as well as the circulation pipe with a pump and a jet 25 aerator placed along the axis of the case above the load. Apparatus of the Invention A device for biochemical treatment of wastewater, comprising a cylindrical body with floating loading, settling and salinization chambers, a feedwater supply pipeline with sprinkler and a pipeline for discharging purified water, in order to increase the oxidizing capacity of the device by increasing the efficiency of aeration and regeneration of the load, the settling chamber is made of cylindrical discharging, the inlet end of the purified water outlet pipeline is located under the conical overlap settling chambers, the device is equipped with a cylindrical partition installed coaxial in the case, in the load between the walls of the case, and the settling chamber, as well as the circulation pipe with a pump and a jet aerator placed along the axis of the case above the load. BUT 6 12 Compiled by L. Sukhanova Editor G. Gerber Tehred V. Kadar Proofreader L. Patay Order 1768/18 Circulation 852Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5 11production and printing company, Uzhgorod, Projecto st., 4 fPuz.2