RU189767U1 - Device for biological wastewater treatment - Google Patents

Abstract

The utility model relates to the field of biological treatment of domestic and industrial wastewater, similar in composition to domestic wastewater, using activated sludge. The required technical result, which consists in expanding the arsenal of technical means used for wastewater treatment, while simultaneously improving the quality of purification and enhancing emergency protection, is achieved in a device comprising a housing divided by partitions into a primary receiving chamber equipped with a fine-bubble aerator, a secondary receiving chamber performing functions of the primary sedimentation tank, sludge stabilizer, aero tank and secondary sedimentation tank, with the primary receiving chamber equipped with an L-shaped overflow pipe va, a small element of which is introduced into the lower part of the secondary receiving chamber, and a larger element is directed vertically upwards and is equipped at the end with a tee to adjust the gulf depending on the installation level through a sludge stabilizer pipe, the secondary receiving chamber, performing the functions of a primary settling tank, is equipped with a large-bubble aerator and airlift pumps, to supply wastewater to an aerotank equipped with a fine-bubble aera an aero-lift pump and a sewage pump through a damper to a secondary settling tank, equipped with a silt-based aft lift pump to feed the active or from the lower part of the secondary settling tank to the aeration tank and to the sludge stabilizer; overflow into it by gravity purified water from the upper part of the secondary clarifier. 1 il.

Description

The utility model relates to the field of biological treatment of domestic and industrial wastewater, similar in composition to domestic wastewater, using activated sludge.

From the prior art a device for water purification [RU 97362, U1, C02F 1/00, 10.09.2010] is known, comprising a housing in which a receiving chamber, an aeration tank, a secondary sedimentation tank and a sludge stabilizer, and also connected to a control unit are located connected to at least one compressor through a solenoid valve an aeration system consisting of a turbo mode subsystem, a direct cleaning phase subsystem and a reverse cleaning phase subsystem, the turbo mode subsystem includes an air distributor, a main pump with large fraction fractions, the main pump air duct, the main pump purge air duct in the receiving chamber, as well as the aerotank circulator pump with the circulator pump air duct, the direct cleaning phase subsystem includes an air distributor, the large fraction filter external aeration duct and the aerotank aerator with an air duct, and the subsystem reverse phase cleaning includes air distributor, receiving chamber aerator with air duct, aerotank recirculator pump with air duct, sludge stabilizer pump with air wire, the secondary pump with the sump duct and purging air pipe of the secondary clarifier, wherein, in the secondary settling tank has a flow damper and the blowing nozzle.

The disadvantage of this installation is the relatively high complexity of the design, the unstable operation of the secondary clarifier, caused by the possibility of the removal of excess activated sludge, and the relatively low maintainability.

The closest in technical essence to the proposed is a device for biological wastewater treatment [RU 184550, U1, C02F 3/02, C02F 3/00, C02F 1/00, 30.10.2018], comprising a body divided by partitions into a receiving chamber, aerotank , a secondary settling tank, a sludge stabilizer, a control unit and a compressor, an aeration system connected to it via an electromagnetic valve, the housing being made in the shape of a cylinder, and the secondary settling tank is formed by vertical walls, while the secondary settling tank is connected to the aeration tank through a lower notch length 80% of its width connects the wall and in the wall connecting the secondary settling tank and the aeration tank, opposite the lower recess arranged inclined plane for rolling off the sludge in the aeration tank with an inclination 30-35 °.

The disadvantage of the closest technical solution is the relatively low quality of cleaning under conditions, in particular, the presence of bio-decomposable debris and grease in water, and relatively insufficient emergency protection.

The task, which is solved in the utility model, is to create a device for the biological treatment of wastewater, characterized by an increased quality of treatment, while providing enhanced emergency protection. This allows you to expand the arsenal of technical tools used for wastewater treatment.

The required technical result is to improve the quality of cleaning while improving emergency protection.

The problem is solved, and the required technical result is achieved by the fact that in a device for biological wastewater treatment, comprising a housing divided by partitions into a primary receiving chamber equipped with a fine-bubble aerator and a branch pipe for feeding wastewater, made in the upper part of the wall of the primary receiving chamber, according to the utility model, the primary receiving chamber is equipped with an L-shaped secondary receiving chamber that performs the functions of a primary settling tank, a sludge stabilizer, an aeration tank and a secondary settling tank. The overflow pipe, the small element of which is inserted into the lower part of the secondary receiving chamber, and the larger element is directed vertically upwards and is equipped with a tee at the end for adjusting the inlet depending on the level of installation of the nozzle for supplying wastewater, as well as the nozzle for introducing the gravity sludge into it supplied through a pipe from a sludge stabilizer, the secondary receiving chamber, which functions as a primary settling tank, is equipped with a large bubble aerator and airlift pumps, for supplying wastewater to an aeration tank equipped with melkop a circular aerator and airlift pump for supplying sewage through a damper to a secondary settling tank, equipped with a sludge airlift pump for feeding active or from the bottom of the secondary settling tank to the aeration tank and stabilizer sludge, and the secondary settling tank is equipped with a clean water collecting section connected to the secondary settling tank. providing overflow into it by gravity of purified water from the upper part of the secondary clarifier, while in the upper part of the secondary clarifier a clean water outlet pipe is installed and secondary settling tank and clean water collection chamber.

The drawing shows a device for biological wastewater treatment in the section.

In the drawing indicated;

1 - primary receiving chamber;

2 - nozzle for supplying wastewater, made in the upper part of the wall of the primary receiving chamber;

3 - wastewater level sensor in the primary receiving chamber;

4 - L-shaped overflow pipe;

5 - tee to adjust the bay;

6 - secondary receiving chamber that performs the functions of the primary clarifier;

7.8 - airlift pumps of the primary clarifier;

9 - active sludge supply pipe from the sludge stabilizer to the primary receiving chamber;

10 - sludge stabilizer;

11 - aero tank;

12 - aerolift pump;

13 - silt airlift pump;

14 - coarse bubble aerator;

15 - fine bubble aerator of the primary receiving chamber;

16 - fine-bubble aerotank aerator;

17 - secondary settling tank;

18 - sedative;

19 - inlet pipe output clean water from the secondary clarifier and clean water collection compartment;

20 - clean water collection compartment;

21 - tee pipe clean water from the secondary clarifier and clean water collection compartment;

22 - exit pipe clean water from the secondary clarifier and clean water collection compartment;

23 - outlet pipe in the sludge stabilizer for the active sludge supply pipe from the sludge stabilizer to the primary receiving chamber.

The device for biological wastewater treatment comprises a housing divided by partitions into the primary receiving chamber 1, equipped with a fine-bubble aerator 15 and a branch pipe 2 for feeding wastewater, made in the upper part of the wall of the primary receiving chamber 1.

In addition, the device contains a secondary receiving chamber 6, performing the functions of the primary clarifier, stabilizer 10 sludge, aeration tank 11 and the secondary clarifier 17.

The primary receiving chamber 1 of the device is equipped with an L-shaped overflow pipe 4, a small element of which is inserted into the lower part of the secondary receiving chamber 6, and the larger element is directed vertically upwards and is equipped with a tee 5 at the end for adjusting the inlet depending on the level of installation waters

The primary receiving chamber 1 of the device is also equipped with a nozzle 9 for introducing into it the gravity of activated sludge fed through a pipe from the stabilizer 10 sludge.

In addition to the above, the secondary receiving chamber 6, performing the functions of the primary clarifier, is equipped with a large bubble aerator 14 and airlift pumps, 7.8 for supplying wastewater to the aeration tank 11, equipped with a fine bubble aerator 16 and an airlift pump 13 for feeding wastewater through a damper 18 to the secondary a sump 17, equipped with a silt aerolift pump 13 for feeding the active or from the lower part of the secondary sump 17 into the aeration tank 11 and into the stabilizer 10 of sludge.

In addition, the secondary settling tank 17 is equipped with a clean water collection compartment 20 connected to the secondary settling tank 17 with a partition providing a gravity of purified water from the upper part of the secondary settling tank 17 to it, while in the upper part of the secondary settling tank 17 there is a pipe for removing clean water from the secondary sump 17 and clean water collection compartment 20 with inlet 19, tee 21 and outlet 22.

A device for biological wastewater treatment is used as follows.

The device is based on the phased retention of wastewater in the aerobic primary receiving chamber 1, which uses fine bubble aeration, and then in the secondary receiving chamber 6, which performs the functions of the primary clarifier, the aeration tank 11, and the process of sedimentation and clarification of the wastewater.

The process of biological treatment consists in the biochemical destruction (oxidation) of organic substances by microorganisms and the elimination of the process of decay in wastewater, which provides clarification of wastewater that becomes transparent, which significantly reduces bacterial contamination.

Wastewater through pipe 2 enters the primary receiving chamber 1 with fine bubble aeration provided by fine bubble aerator 15, where the incoming waste water is averaged. It also produces an initial biological and mechanical cleaning. In the primary receiving chamber 1 constantly by gravity through the pipe 9 feed active sludge from the stabilizer 10 sludge into the primary receiving chamber 1 is fed activated sludge (biological active medium consisting of colonies of aerobic microorganisms developing in the process of operation of the device. To control emergency situations in the receiving chamber installed Level sensor 3 with a crash indicator light located on the outer part of the device case (cover). Overflows from the primary receiving chamber 1 to the secondary receiving chamber 6 are provided with a L-shaped overflow pipe 4 so that during installation it is possible to adjust the level depending on the depth of the supply pipe (pipe 2). Adjustment is made by moving the tee 5 along the L-shaped pipe 4. This allows you to use the primary receiving chamber 1 as a sewage pumping station, in which, if necessary, you can place a fecal pump for transfer to the secondary receiving chamber 6, which serves as the primary settling tank. This allows you to install the device when the inlet pipe is below 1.5 m from ground level.

In the secondary receiving chamber 6, which serves as the primary clarifier, anaerobic purification processes take place. To maintain the activated sludge in the suspended state, the entire volume of the primary sedimentation tank is constantly mixed using a large-bubble aerator 14. Airlift pumps 7 and 8 are installed in the secondary receiving chamber to transfer wastewater to the aeration tank 11, where the final destruction of organic compounds by oxidation with active sludge occurs, as well as saturation of wastewater with air oxygen using a fine bubble aerator 16.

The mixture of wastewater and activated sludge is directed through the damper 18 to the secondary clarifier 17 using an airlift pump 12, where, in the absence of aeration, active sludge separates from the purified water under the action of gravity. Purified water by gravity into the clean water collection compartment 20. Purification of purified water can be performed by a combined method or by gravity through the outlet 22 of the clean water outlet pipe from the secondary clarifier and the clean water collection compartment or by force using a pump that is installed in the clean water compartment 20. To do this, use the tee 21 pipe output clean water from the secondary clarifier and the collection compartment of clean water. This design allows you to divert purified water even after a power outage.

Separated sludge settles in the lower part of the secondary clarifier 17 and is sent to the stabilizer 10 sludge using a silt airlift pump 13 for further direction to the primary receiving chamber 1.

To prevent mixing of wastewater from the primary receiving chamber 1 and the secondary settling tank 17, emergency overflows are provided in the device, which makes it possible not to lose the station’s operation even in the absence of electricity, since all airlift pumps work only with oxygen supply.

In the proposed device, the adjustment of the level of wastewater in the primary receiving chamber allows you to set the standard height of the cleaning device, regardless of the depth of the supply pipe (from 10 cm to 180 cm due to the system changes the level in the primary acceptance).

In addition, the design of the primary and secondary reception chambers allows to completely remove bio-decomposable garbage and fats from wastewater due to the movement of wastewater through the lower overflow system. Fats and part of the garbage remains in the primary clarifier, and the remaining part of the garbage remains in the primary receiving chamber.

There are no frequently breaking devices in the device (float switches, solenoid valves, bubble sensors, complex control units, etc.

The device is able to work even in the absence of electricity, as the device in its absence goes into operation on the principle of a gravity multi-chamber septic tank.

Thus, thanks to the introduced improvements, an expansion of the arsenal of technical means used for wastewater treatment is achieved while at the same time achieving the claimed technical result, which consists in improving the quality of cleaning and enhancing emergency protection.

Claims (1)

A device for biological wastewater treatment, comprising a housing divided by partitions into a primary receiving chamber, equipped with a fine bubble aerator and a nozzle for feeding wastewater, made in the upper part of the wall of the primary receiving chamber, a secondary receiving chamber acting as the primary settling tank, sludge stabilizer, aeration tank and secondary settling tank, characterized in that the primary receiving chamber is equipped with an L-shaped overflow pipe, a small element of which is inserted into the lower part of the secondary receiving chamber, and The larger element is directed vertically upwards and is equipped at the end with a tee for adjusting the inlet depending on the level of installation of the nozzle for supplying sewage, as well as a nozzle for introducing into it the gravity of active sludge supplied through the pipe from the sludge stabilizer, the secondary receiving chamber acting as the primary clarifier It is equipped with a large bubble aerator and aerolift pumps, for supplying wastewater to an aeration tank, equipped with a small bubble aerator and an airlift pump for feeding wastewater through a damper in the second egg sump equipped with a silt aerolift pump for supplying active or from the bottom of the secondary sump to the aerotank and to the stabilizer of sludge, the secondary sump having a clean water collection compartment connected to the secondary sump with a partition that provides a gravity of purified water from the top of the secondary sump to it At the same time, in the upper part of the secondary clarifier, a clean water outlet pipe from the secondary clarifier and the clean water collection compartment is installed.

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