RU209119U9 - WASTE WATER TREATMENT DEVICE - Google Patents

Abstract

The utility model relates to housing and communal and agriculture, can be used for biological wastewater treatment of individual residential buildings of suburban and rural infrastructure. SUBSTANCE: wastewater treatment device comprises a housing equipped with a wastewater supply pipe forming an aerotank, a secondary sump connected to the aerotank by a channel desilter, a treated water tank connected to the secondary sump by an overflow pipe, aerators and a transport system. The channel desilter is additionally equipped with an agglomeration chamber equipped with a partition forming equal corridors. The wastewater treatment device achieves an increase in the degree of wastewater treatment by intensifying flocculation and improving the sedimentation characteristics of activated sludge.

Description

The utility model relates to housing and communal and agriculture, can be used for biological wastewater treatment of individual residential buildings of suburban and rural infrastructure.

Known wastewater treatment devices containing a body equipped with a wastewater supply pipe, forming an aerotank, a secondary sump, a treated water tank connected to the secondary sump by an overflow pipe, aerators and a transport system [1, 2, 3].

Known devices are not effective enough in the processes of wastewater treatment due to sticking and clogging of the holes of the aerators located at the bottom of the aerotank, sludge flakes during the change of operating mode of the devices. Also, the known devices have low manufacturability and reliability due to the complexity and bulkiness of the structures, the impossibility of using them in the modernization of existing wastewater treatment devices for individual residential buildings of suburban and rural infrastructure.

The closest technical solution to the claimed device and adopted as a prototype is a wastewater treatment device, containing a housing equipped with a wastewater supply pipe, forming an aerotank, a secondary sump connected to the aerotank by a channel desilter, a treated water tank connected to the secondary sump by an overflow pipe, aerators and transport system [4, 5].

The disadvantages of the known wastewater treatment device include low agglomeration of sludge flakes in the channel desilter due to the high flow rate of wastewater, and, as a result, the entrainment of fine sludge flakes into the secondary clarifier, a decrease in the sedimentation moisture-releasing properties of activated sludge, and a decrease in the efficiency of wastewater treatment.

The task to be solved by the proposed technical solution is to increase the efficiency of wastewater treatment of individual residential buildings of suburban and rural infrastructures.

The result of the proposed technical solution is the intensification of the process of flocculation and an increase in the sedimentation moisture-releasing properties of activated sludge.

The stated technical result is achieved by a wastewater treatment device comprising a housing equipped with a wastewater supply pipe forming an aeration tank, a secondary sump connected to the aeration tank by a channel desilter, a treated water tank connected to the secondary sump by an overflow pipe, aerators and a transport system. Moreover, the channel desilter is additionally equipped with an agglomeration chamber made at the inlet with a double diameter, equipped with a partition forming equal-sized corridors, and a length that ensures the residence time of the treated wastewater (10 ... 20) min.

Supplying the channel desilter with an agglomeration chamber made at the inlet with a double diameter, equipped with a partition forming equal corridors, contributes to a sharp decrease in the flow velocity at the outlet of the flow divider from (0.2 ... 0.3) m / s to (0.05 ... 0, 1) m/s. This increases the probability of particle collision, their agglomeration into large flakes. At the same time, the biofilter, when the wastewater flow passes through it, does not experience impact, which ensures the growth of biomass on the carrier, maintaining a high oxidation rate, and improving the sedimentation moisture-releasing properties of activated sludge. Thus, flocculation and sedimentation of activated sludge is intensified.

The execution of the agglomeration chamber with a length that provides the residence time of the treated wastewater (10 ... 20) minutes also provides intensive mixing and agglomeration of small flakes with larger particles, an increase in the gravitational effect up to 20% (Table 1).

The drawings show a wastewater treatment plant, where in Fig. 1 is a general view, in Fig. 2 - view A in Fig. 1 in FIG. 3 - view B in Fig. 1 in FIG. 4 - remote element B in Fig. 3, fig. 5 - section Г-Г in Fig. 4.

Wastewater through the pipe 1 enters the aerobic zone 2 of the aerotank 3. Here, the processes of destruction of organic matter into nitrites and nitrates take place, and also, in the pauses between the supply of wastewater, the regeneration of activated sludge recirculating from the secondary clarifier 4. At the same time, a high rate of oxidation of organic matter is achieved intensive supply of air bubbles by aerator 5 and mixing of activated sludge with wastewater.

Next, wastewater enters the anaerobic 6 zone of the aerotank 3. Here, the main part of the suspended particles is retained and mixed with air bubbles from the aerator 7 located at the bottom of the aerotank. Due to oxygen deficiency, a denitrifying biocenosis of microorganisms is formed, which, in the process of vital activity, break down nitrates to free nitrogen.

To intensify sludge separation, the aerotank 3 is connected to the secondary sump 4 by a channel silt separator 8. Here, wastewater alternately passes a flow divider 9, an agglomeration chamber 10 of activated sludge flakes, a biofilter 11 and a flow stabilizer 12.

In the flow divider 9, due to air bubbles from the aerator 13, a spiral upward flow is formed, separated by a partition 14 from the total wastewater flow, with which suspended particles are carried into the circulation channel 15 and into the aerobic zone 2 of the aerotank 3. From the direct-flow channel 16 of the flow divider 9, waste The waters are directed to the agglomeration chamber of 10 activated sludge flakes, made with a double diameter at the inlet. In this case, in the truncated part of the channel, they are twisted, accompanied by a sharp decrease in the flow velocity.

In the agglomeration chamber of 10 activated sludge flakes, a partition 17 is installed for the entire length at half of its diameter. Partition 17 divides the streams into two equal corridors, which ensures their orderly and calm movement. Upon reaching the upper level of the partition 17, both wastewater streams collide with a dense layer of the biofilter 11 of activated sludge. At the same time, some suspended particles are captured by the biofilter 11, providing an increase in the biomass on the carrier and maintaining a high oxidation rate, thereby improving the sedimentation moisture-releasing properties of the activated sludge. Other particles remain in suspension, are attracted to each other due to gradient coagulation and stick together, which increases the rate of flocculation and the intensity of activated sludge sedimentation.

The agglomeration chamber of 10 activated sludge flakes is structurally designed to ensure the residence time of wastewater from 10 minutes to 20 minutes. Thus, due to intensive mixing and agglomeration of small flakes with larger particles, the gravitational effect increases up to 20%.

Further, the wastewater in a clarified state, having passed the flow stabilizer 12, in the upper part of which an aerator 18 is installed, enters the secondary sump 4. Air bubbles from the aerator 18, creating an oncoming flow, return the slipped suspended particles back to the biofilter 11.

The sediment accumulated in the secondary sump 4 is forcibly returned by the recirculator 19 to the aerobic zone 2 of the aeration tank 3, and the treated wastewater through the overflow pipe 20 enters the treated water tank 21, from where the water is pumped out of the installation by a submersible pump 22 through the water pipe 23.

As a result of settling, a biofilm is formed on the surface of the secondary clarifier. To remove it, at the level of the overflow pipe 20, a U-shaped airlift 24 is installed.

Air is supplied to the aerators from the compressor 25 through the air distributor 26 through the transport system.

Thus, the wastewater treatment device achieves an increase in the degree of wastewater treatment by intensifying flocculation and improving the sedimentation characteristics of activated sludge.

Bibliography

[1] Patent No. 2201405 RF, IPC C02F 3/02. Wastewater treatment method and device for its implementation / Yu.O. Bobylev, A.O. Bobylev. Published 03/27/2003.

[2] Patent No. 2220112 RF, IPC C02F 3/02. Wastewater treatment method and device for its implementation / Yu.O. Bobylev. Published 12/27/2003.

[3] Patent No. 2228915 RF, IPC C02F 3/02. Wastewater treatment method and device for its implementation / Yu.O. Bobylev. Published May 20, 2004.

[4] Patent No. 173043 RF, IPC CO2F 3/02, CO2F 3/12, CO2F 3/22. Biocleaning device / V.V. Yasakin, E.A. Dugin, A.E. Novikov, V.I. Pyndak. Published 08/08/2017.

[5] Patent No. 173044 RF, IPC CO2F 3/02, CO2F 3/12, CO2F 3/22. Device for biological wastewater treatment / V.V. Yasakin, E.A. Dugin, A.E. Novikov, V.I. Pyndak. Published 08/08/2017.

[6] Zhmur, N.S. Technological and biochemical processes of wastewater treatment at facilities with aerotanks / N.S. Zhmur. M.: AQUAROS, 2003. 512 p.

Claims (1)

A wastewater treatment device, comprising a housing equipped with a wastewater supply pipe forming an aeration tank, a secondary settling tank connected to the aeration tank by a channel desilter, a treated water tank connected to the secondary settler by an overflow pipe, aerators and a transport system, characterized in that the channel desilter is additionally equipped with an agglomeration chamber equipped with a partition forming equal-sized corridors.

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