SU952764A1 - Apparatus for biochemical purification of effluents - Google Patents

Description

The invention relates to sewage treatment plants for the biochemical treatment of wastewater, characterized by rare fluctuations or frequency of their flow in terms of consumption and organic pollution.

A known installation for biochemical wastewater treatment, comprising a cylindrical body, divided by a perforated partition into a settling basin with a submersible pump and an aeration tank with an ejector aerator, pipelines 1.

A disadvantage of the known installation is that it does not allow to disinfect biochemically treated wastewater and, therefore, immediately after biochemical treatment, discharge it into open water bodies due to the danger of epidemiological contamination of the environment.

The purpose of the invention is to increase the efficiency of use by providing integrated water treatment.

This goal is achieved by installing a cylindrical body divided by a cylindrical, coaxially arranged partition wall to a settling basin with a submersible pump and a central aeration tank with an ejector aerator, water supply and discharge pipelines in vertical partitions attached to the walls of the body in a staggered order and dividing the chamber into communicating sectors.

FIG. 1 shows the installation, top view; On.) Ig. 2-- section A-A in FIG. one; in fig. 3 - scan of the annular camera in axonometric view.

The installation includes a cylindrical body 1 of an aero-sump, a pipeline 2 for supplying wastewater, a perforated mesh partition 3, an ejector aerator 4, electrified valves 5 and 6, a submersible pump 7, a pipeline 8 for disposal of wastewater, an annular chamber 9 for disinfection biochemically treated wastewater, divided into sections by vertical partitions 10, a guide partition 11 and a drainage pipeline for discharged Sewage waters.

Claims (1)

Yeregorodka 10 are arranged in a shaf30 order, while the lower partitions are not brought to the overlap of the reservoir, and the upper partitions to the bottom. The partition 11 separates the zone of intake fluid from the outlet zone. The plant operates automatically in the modes of biochemical wastewater treatment by the method of prolonged aeration (complete oxidation) of them with activated sludge; sedimentation and clarification of purified waters at rest; disinfection. The duration of the biochemical purification regime is 21.5 hours, settling and refluxing for 2 hours, disinfection 24 hours. During the biochemical treatment mode, the wastewater from the sewage facility passes through pipeline 2 into the central zone of the aerotank, limited by a perforated cylindrical mesh-partition 3, in which large undissolved impurities are kept. From the zone, the water is fed into the peripheral zone of the aero-benthic sump, mixing with active sludge. A pump 7 through an open catch 5 with a closed valve b of water and sludge is pumped into an ejector aerator 4, with which it is enriched with air oxygen. As a result of the viability of microorganisms of activated sludge in the presence of dissolved oxygen in air, biochemically oxidized waste water is purified. The mode of sedimentation and clarification of biochemically treated wastewaters — the separation of water and sludge — carried out at a time when there is no influx of wastewater. The unit switches to this mode of operation automatically via a time relay; the power of the pump 7 is turned off and the valve 5 is closed by an electric drive. When the water is settled and clarified, the pump 7 is also pushed into the contact tank - the ring is removed from the aero-benches of the biochemically cleaned and clarified waste water. chamber 9, which simultaneously receives the required amount of the decontamination solution dego reagent. The aero-settling tank is no more than 2/3 of its volume, then the valve 5 opens, the valve b is closed and the installation continues to operate in the biochemical wastewater treatment mode. In the contact tank, the purified water is mixed with a disinfectant reagent. In order to make the processes of mixing and disinfection more complete and more efficient, vertical rebuilds are installed in it. While advancing in the contact tank from the inlet zone to the outlet zone separated by a septum, the water and the reagent solution pass a complex path under the upper partitions and over the lower ones, mix well, displace the previously decontaminated water in the tank and are kept there until the beginning of the flow. biochemically treated water for disinfection. The application of the proposed installation optimally solves the complex problem of complete biochemical treatment and deep disinfection of sewage, opens up wide possibilities for further use of purified and decontaminated water in commercial activities or allows water to be discharged to the nearest open water bodies without the danger of epidemiological contamination of the environment. When water is reused in economic activity, the economic result of the installation is determined by the economy of the corresponding consumption of clean tap water and the cost of its preparation, and in the event of a discharge, the installation meets the requirements of the Law on Nature Protection and Rational Use of Natural Resources. Invention Formula -. A plant for the biochemical treatment of wastewater, comprising a cylindrical body divided by a cylindrical, coaxially arranged partition into a settling basin with a submersible pump and a central aeration tank with an ejector aerator, supplying and discharging wastewater, in order to increase efficiency and use due to the provision of complex water treatment, it is equipped with a device for disinfection, made in the form of an annular chamber coaxially located outside the case, The partition walls are attached to the walls of the body in a staggered order and divide the chamber into communicating sectors. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 812759, cl. C 02 F 3/20, 21.05.79. LL2