SU1599317A1 - Apparatus for bioological treatment of effluent - Google Patents

Abstract

The invention relates to water supply and sewage and can be used in wastewater aeration stations. The use of the device reduces the final moisture content of the activated sludge and reduces the cost of this process, as well as provides complete biological treatment. The biofilter cloth is made in the form of a moving endless belt, and the biofilm drying chamber is separated by a vertical partition in the biofilter. In its lower chamber there is a heated air supply piping and scrapers at the exit from it to remove and dry the sludge. 2 Il.

Description

The invention relates to sewage and can be used to clean wastewater at aeration stations.

The purpose of the invention is to improve the efficiency of biological treatment, clarification of the sludge mixture and ensuring a decrease in the moisture content of the sediment and the cost of its treatment.

FIG. 1 shows a device for the biological purification of water; a plan; FIG. 2 is a section A-A in FIG. B

The device for biological treatment of waste liquid is an aeration tank 1 with jet aerators 2 installed in it, connected to distribution bowl 3. Tray 4 of initial waste liquid and pipe 5 supplying the mixture to biofilters 6 are connected to distribution bowl 3. Vertical partition

7 divides the capacity of the biofilter 6 into two chambers: chamber B of the charge contact with the waste liquid and chamber 9 of biomass drying. An endless web 10 fixed to the frames 11 and an electric motor 12 is installed in the tank of the biofilter 6. Scrapers 13 are installed in the biomass drying chamber. Aerotank 1 is connected to the bottom of the conical part of the secondary clarifier 14 by pipe 15. The secondary clarifier 14 is equipped with thin-layer modules 16 and trays 17 for collecting purified wastewater. In the space below the thin-layer modules 16 of the secondary clarifier 14, a nozzle 18 is installed, connected by a pipe 19 to a pump 20 of return sludge. The pump 20 is connected to the distribution bowl 3 by a pipe 21. The heated air is supplied to the lower part of the zone 9 through the pipe 1 to the conduit 22.

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The device works as follows.

Sewage water through tray A enters the distribution bowl 3, return sludge is fed through pipeline 5. The mixture enters the jet aerators 2 and, capturing air, moves along them to the aeration zone aeration zone 1. The water with microorganisms is cleaned in the aeration tank 1 activated sludge through the pipeline 15 enters the bottom. part of the conical part of the secondary stall. The mixture is reflected by the ioT base of the settler 14, pump 20 is fed to the nozzle 18 and moves upwards. In this case, a zone of suspended layer is formed under the sublayer, modules, which increases the efficiency of clarification. After passing the suspended layers, the water is finally clarified in the thin-layer modules 16, collected in trays 17 and discharged for further processing. Return sludge enters the distribution bowl 3. Through pipelines, the 5 part of the sludge mixture enters the distribution system located above the chamber 8 of the biofilter 6. and flows through the loading sheet 10. This process cleans the waste liquid and effectively dissolves the oxygen in the sludge mixture. At the same time, during the film movement of the silt mixture along the web, the active sludge is transferred to the biofilm and is fixed.

The moisture content of the biofilm is about 96%, which cannot be achieved using gravitational silt seals. The electric motor U, mounted on the body of the biofilter 6, sets the loading web in motion. Thus, the web of loading with a biofilm attached to it dvzhets and gradually passes into the chamber 9 of the drying of the biofilter 6, separated by a vertical partition 7. In the chamber 9 through the pipeline 22 is fed the heated air, which, podij

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When using the proposed device, complete biological sewage treatment is provided, their effective clarification in the secondary settling tank and sludge treatment. The final moisture content of the biomass at the exit from the drying zone is 60-70%. By reducing the moisture in the proposed device, expensive reagents that are used in mechanical dewatering are not used, which significantly reduces the cost of cleaning.

Claims (1)

Invention Formula A device for biological treatment of waste liquid, containing a biofilter with loading, a waste liquid supply tray, an aeration tank with aerators, a secondary settling tank with a suspended sediment layer, a sludge supply pipe from an aero tank to a secondary settling tank, a recirculation pump and a return sludge pipeline, characterized in that , in order to increase the efficiency of biological treatment, clarify the sludge mixture and ensure a decrease in the moisture content of the sludge and the cost of its treatment, the loading of the biofilter is infinite The first vertical movable web, the device is equipped with a vertical partition, installed in the biofilter and forming a chamber with a load and a biomass drying chamber, slotted in the partition, windows for the passage of the web, which are provided with scrapers. FIG. one one 17 PT Aa   1 iit ,,, f  y / g / /// / f / // f / A I 7 /