RU2305662C1 - Method of purification of the waste waters and the device for its realization - Google Patents

Abstract

FIELD: municipal and household waste waters purification.

SUBSTANCE: the invention may be used for the waste waters purification in cottages, country houses, hotel complexes, schools, settlements, sports clubs, public catering establishments. The device contains the body (1) with the sealed cover, in which there are the leveling tank with the active sludge (3) supplied with the fitting pipe (2) used for feeding of the waste waters, the emergency sensor unit, the aerators-stirrers (4). The leveling tank (3) communicates with the activation tank (7) by means of the overflow fitting pipe (5) arranged in the near-bottom area of the dividing wall (6). In the activation tank (7) there are the small-bubbling aerators (8), the tube well (9) with the main pump (12) and the internal aerator (11), the large-bubbling aerator (20) of the external blowing. The walls of the tube well (9) in the middle area are have the perforation (14), embrace outside by the shell (18) which has been made in the form of the cylinder, the lower butt of which is arranged in the funnel (15), the smaller base of which is hermetically consolidated on the outer wall of the tube well (9). The device also includes the aerotank (21) supplied with the small-bubbling aerator (8),the silt recirculating pump (22) and the circulation pump (25) of the partially purified water. The aerotank (21) communicates with the secondary settling tank (27) supplied with the stabilizer of the incoming purified water, the outlet filter (32), the pure water offtake fitting pipe (33), the aerator-breaker of the biofilm (34), the pump-remover of the biofilm (35). The pump-remover of the biofilm (35) is made in the form of the pipeline having the J-shaped form. One end of which is arranged below the area of the outlet filter (32), and the second end - above it. The device also contains the silt stabilizations chamber (24) supplied with the silt stabilizer and the aerators-stirrers (4) arranged in its near bottom part. This chamber is interconnected with the leveling tank (3) by means of the overflow pipeline (41). Besides the device is supplied with the control unit (42), the compressor (43), the distributors (45), (47) and (48) accordingly, the turbo stages of the first and second stages. The distributors (45), (47) and (48) are coupled by the air ducts to the aerators and the pumps. The invention allows to use repeatedly the purified waste waters, to diminish the power inputs, to simplify the design of the device, to increase its reliability, to reduce the labor input at its manufacture, operation and purification.

EFFECT: the invention allows to use repeatedly the purified waste waters, to diminish the power inputs, to simplify the design of the device, to increase its reliability, to reduce the labor input at its manufacture, operation and purification.

5 cl, 5 dwg

Description

The invention relates to self-regulating systems, including a method and device for deep biological treatment of domestic wastewater with activated sludge in suspension, used both in stand-alone cottages, homesteads, in hotel complexes, schools, sports clubs, towns, catering establishments, and t .d.

In biological wastewater treatment, activated sludge is used, which is a mixture of various bacteria and small microorganisms, but the activation process is possible only with the continuous presence of atmospheric oxygen with varying degrees of saturation, which ensures continuous interaction of wastewater with sludge in its suspended state and, therefore oxidation process.

Known patents of Russia by CL. С02 3/02, No. 819069, 1987, “Device for wastewater treatment” and No. 2057085, 1994, “Compact installation for wastewater treatment”, in which there are aeration chambers, two-tier sedimentation tanks, silt collectors, pneumatic aerators, supply pipes sewage, overflow of purified water from one chamber to another and removal of purified water. However, these devices are complex in design, which complicates their manufacture and efficient use with periodic uneven flow of wastewater.

Known technical solution for the patent of Russia No. 2060967, class. С02F 3/02, 1995 "Method for the deep biochemical treatment of wastewater and an installation for its implementation", in which according to the method the feed wastewater is supplied, primary sedimentation of wastewater, aeration, secondary sedimentation of the sludge mixture, ozonation, sludge recycling and discharge purified water. Installation according to this source of information consists of a primary sump, aeration tank with an aerator, a secondary sump, sewage supply pipelines, sludge removal, activated sludge recycling, purified water discharge, as well as ozonation in the primary sump, an additional sump communicated with the primary sump, and a cleaned tank water, and pipelines for sludge and activated sludge connecting the lower parts of all sedimentation tanks. However, this technical solution both in part of the method and in the part of the device is very complicated and cluttered with unnecessary pipelines, and ozonizers are installed in inefficient places of the containers.

A well-known lineup of installations under the general name "YUBAS", protected by patents of the Russian Federation No. 2201405, 2220112, 2228915 "Method of wastewater treatment and device for its implementation." These are fully automated systems of various difficulty levels. All these technical solutions contain an accumulative equalizing tank, where preliminary aerobic-anoxide biological treatment is carried out with aerobic activated sludge and the process of enzymatic decomposition of organic pollutants takes place. Next, pre-treated water with sludge enters the aeration tank-activation tank, where the final destruction of organic pollution occurs, after which the water enters the sump. The settled sludge accumulates at the bottom of the sump, and water, having passed a series of purifications through porous filters, is removed from the plants.

The closest technical solution of the above is the "Method of wastewater treatment and device for its implementation" according to the patent of the Russian Federation No. 2228915, class. С02F 3/02, 2003, which includes a leveling tank, an activation tank, a settling tank, a sludge stabilization chamber, a system of pipelines and pumps that provide for overflow of water or its forced pumping, and a control unit. This device and method for wastewater treatment provides for a more thorough filtration of water after the sump, but water from the equalizing tank with not completely decomposed organic contaminants enters the activation tank, which complicates the operation of the activation tank and sump. The device is complicated by a large number of chambers with a porous filter, which complicates its manufacture and operation.

The technical task of the present invention is the creation of a self-regulating system, including a method and a compact installation, ensuring the achievement of a technical result, which consists in obtaining high-quality treated wastewater, suitable for reuse, reducing energy consumption during the intensification of treatment, which consists in organizing a rational scheme of the process of enzymatic decomposition of organic pollutants with the accumulation of free carbon, as well as the process of nitrification, denitrification and dephosphotation at all stages of wastewater treatment, thereby facilitating the work of cleaning in each subsequent tank, and therefore, increasing the effective degree of wastewater treatment, as well as simplifying the design, which increases the operational reliability of the device and reduce the complexity both in its manufacture and in its operation.

The set result is achieved in that in a wastewater treatment method characterized in that the duration of two alternating phases of the operation of the device is pre-set, air is supplied from the turbo phase distributor to the constantly working main pump and the internal aerator of the tubular well, in the first phase, air is supplied to the first phase distributor from where it is distributed into a fine bubble aeration tank aerator, aerator-agitators of the sludge stabilization chamber, an external aerator of a tubular well, wastewater is supplied portionwise through one pipe into a balancing tank containing activated sludge, followed by their flow into an activation tank, also containing activated sludge, the suspension of partially treated wastewater with activated sludge is raised by an external aerator of a tubular well, followed by its transfer to a tubular well and its subsequent transfer from the bottom zones of the tubular well with the help of the main pump into the aerated aeration tank, from where water flows into the secondary sump according to the law of communicating vessels, where it is defended, and after raising the water level in the secondary sump above the cut of the outlet filter pipe by gravity removes purified water through the outlet filter with the outlet pipe outside the device, and after lowering the level of wastewater in the activation and equalization tanks to the working level and stopping the flow of suspension with partially purified water into the tubular well pump out the contents of the tubular well and transfer the main pump to idle, as a result of which the removal of purified water outside the devices is stopped and they continue the process autonomously in all capacities of the device until the next portion of wastewater is fed into the equalization tank, as a result of which the main pump is resumed and the treated water is discharged outside the device in an amount not exceeding the received portion of wastewater; after the first phase is completed, the operation is switched off devices at the beginning of the second phase, stop the air supply to the distributor of the first phase and supply air to the distributor of the second phase, stop aeration in the aeration tank, turn off the Kamer aerator-mixers To stabilize, or, an external coarse bubble aerator of a tubular well, include agitators aerators in the equalizing tank, fine bubbles aerator in the activation tank, supply air to the recirculation and circulation pumps of the secondary sump to the biofilm aerator-breaker and the biofilm remover pump, partially pump out the recirculation pump purified water from excess sludge from the bottom of the aeration tank into the sedimentation chamber of the sludge stabilization chamber, facilitating the flow of displaced water with a part of After suspension by gravity, first into the equalization tank, and then into the activation tank, which either leads to restoration of the main pump operating mode from idle mode or to continuation of the main pump operation in the operating mode, water is pumped from the tubular well, while the main and recirculating ones the pumps work counter-clockwise, at the same time in the second phase they clean the secondary sump by switching on the biofilm remover pump, the secondary sump circulation pump and the biofilm aerator-breaker, moreover in the absence of a water level in the secondary sump below the cut-off of the nozzle of the biofilm remover pump, this pump goes into idle mode, the process of settling the sludge and squeezing it out into the aeration tank is started by the secondary sump circulation pump by pumping clarified water from the middle zone of the aeration tank to the secondary settler sump, and the circulation pump the secondary sump is switched on at the beginning of the second phase, and when a large volume of incoming wastewater is supplied, the level in the equalizing tank rises, safing sensor, the device is forced into the first phase of operation and the first phase timer is zeroed.

The stated result is achieved in that in the second phase, the capacity of the sludge recirculation pump for transferring sludge from the aeration tank to the sludge stabilization chamber is chosen more than the capacity of the main pump, and the lower water level in the secondary sump and the aeration tank is fixed when the capacities of the main and recirculation pumps are equal.

The set result is achieved in that in a wastewater treatment device, comprising a housing with a sealed cover, in which an equalizing tank containing an activated sludge is provided, equipped with an inlet of a sewage supply, an emergency sensor, aerators-agitators and communicating with the activation tank through an overflow pipe, located in the bottom zone of the dividing wall of the equalization and activation tanks, while in the activation tank there is a fine bubble aerator, tubulars a well with a main pump and an internal aerator, a coarse-bubble aerator for external blowing of a tubular well, the walls of the tubular well in the middle zone being perforated and surrounded on the outside by a shell made in the form of a cylinder with a lower torus located in the socket, the smaller base of which is hermetically fixed to the outer wall of the housing tubular well; aeration tank equipped with a fine bubble aerator, a sludge recirculation pump and a partially purified water circulation pump, a secondary settling tank in communication with it, equipped with a partially purified water flow damper, an output filter, a clean water outlet pipe, a biofilm aerator-divider, a biofilm removal pump, a biofilm pump J-shaped pipeline, one end of which is located below the outlet filter zone, and the second end is above the outlet filter zone in the upper part of the aeration tank; sludge stabilization chamber equipped with a sludge damper and agitators-aerators located in its bottom region, while the sludge stabilization chamber is interconnected with an equalizing tank by means of an overflow pipe, a control unit, a compressor and turbofase distributors of the first and second phases connected by air ducts to supply air to the aerators and pumps.

The result is achieved in that the device case is made of plastic in the form of a glass and has a cylindrical or rectangular shape, and the glass walls are made of two concentrically mounted coaxial pipes, internal and external connected by stiffeners, while the end zone of the internal pipe covers an adapter with a through hole, the outer side of which is made with a rectangular flange, and the cavity between the outer and inner nozzles is filled with layers of fillers, bottom the lower layers are heavier, for example concrete, and the upper ones are light and heat-saving, for example polyurethane.

Figure 1 presents the device for wastewater treatment, figure 2 is a top view of the device for wastewater treatment when the case is cylindrical, figure 3 is a section aa of figure 2, figure 4, 5 is a top view devices when the case is rectangular.

A device for wastewater treatment includes a housing 1 and a hermetically closing cover (not shown). In the housing 1 there are several containers for the sequential movement of wastewater, as a result of which it is processed. Initially, the wastewater enters through the inlet pipe 2 of the wastewater supply to the equalizing tank 3. In the bottom part of the equalizing tank 3, aerators are installed - mixers 4, which are turned on in the second phase of the device and process the wastewater with a rising air flow, while maintaining a high concentration of enzymes for decomposition of organic pollutants. From the equalization tank 3, water flows by gravity through the overflow pipe 5 located in the bottom zone of the separation wall 6, separating the equalizing 3 and activation 7 tanks, enters the activation tank 7, where the water is subjected to subsequent processing. A fine bubble aerator 8 is located in the activation tank 7, but several can be installed. Since the fine bubble aerator 8 is located in the bottom zone, air bubbles penetrate the entire column of water in the tank 7, and the fine bubbles provide a more reliable and thorough dissolution of air oxygen for use by biomass in the oxidation of decaying organic waste water pollution. In the activation tank 7 there is a tubular well 9 with a closed bottom 10. In the tubular well 9 there is an internal aerator 11, the main pump 12, which is an airlift. The walls 13 of the tubular well 9 in the middle zone are made with a perforation 14, below which a bell 15 is fixed, the smaller base of which covers and is hermetically fixed to the wall 13 of the tubular well 9, and the larger base 17 is directed upward. An emergency sensor 16 is installed in the equalizing tank 3. A cylindrical shell 18 is fixed over the base 17 on the tubular well so that its lower end enters the bell 15 with the formation of a gap 19 between the shell 18 and the base 17. When the column of treated water in the activation room 7 reservoir above the gap 19, it, according to the law of communicating vessels, enters the shell, and with its further increase, it flows by gravity through the perforation 14 in the walls of the tubular well, falling into it. Outside, the tubular well 9 is blown by a coarse-bubble aerator 20, due to which large inclusions are distilled from the bell 15, but sludge is mixed with water when water is supplied from the well 9 to the aerotank 21 in the first phase. Inside the tubular well, water is constantly exposed to air through an internal aerator 11, and the main pump 12 pumps partially purified water from it to the aeration tank 21. In the aeration tank 21, a small-bubble aerator 8 is placed in the bottom zone, a recirculation pump 22 for transferring sludge to the damper 23 of the stabilization chamber 24 sludge, as well as the secondary sump circulation pump 25 for pumping water into the damper 26 of the secondary sump 27. The secondary sump 27 is made in the form of a cone, the smaller base of which is facing down, at the same time, in the wall 28 at the lower smaller base 29 there is a neck 30, and the base 29 in the neck region 30 is provided with a visor 31. In the secondary sump 27, purified water settles, sludge settles on the base 29, and thanks to the neck 30 and the secondary sump circulation pump 25 in the second phase it is squeezed out of the secondary sump 27 and deposited in the aeration tank 21. The secondary sump 27 is equipped with an outlet filter 32 with an outlet pipe 33 for draining completely purified water, an aerator-breaker 34 of the biofilm, as well as a pump a biofilm terminal 35 made of a J-shape with uneven elbows, with the open end 36 of the low elbow 37 located in the secondary settling tank 27 at a level slightly lower than the outlet filter 32, and the end 38 of the high elbow 39, equipped with an air pump 40, is located above the aeration tank 21. The sludge stabilization chamber 24 is equipped with aerators-mixers 4 and connected to the equalizing tank 3 by an overflow pipe 41, which allows gravity to move the water displaced when the mixture of sludge with water comes from the aeration tank 21. Re the circulation pump 22, which transfers excess sludge to the damper 23 of the sludge stabilization chamber 24, is installed just below the neck 30, and the secondary sump circulation pump 25 for pumping water into the damper 26 of the secondary sump 27 is installed at the level of perforation 14 of the tubular well 9. In the housing 1 is installed a control unit 42, a compressor 43 connected by an air duct 44, with a turbofase distributor 45 and with a switching control valve 46 that provides air to the distributor 47, which ensures operation of the unit devices in the first phase, and dispenser 48, which ensures the operation of the device in the second phase.

The housing 1 of the proposed device can be made both cylindrical in the form of a glass, see Fig. 2, and rectangular, see Fig. 4, 5, in the form of a glass the walls of which are made of two concentrically mounted coaxial pipes of internal 49 and external 50, connected between stiffeners 51, the entire body is made of polypropylene, while the end zone, i.e. the neck of the inner pipe 49 is covered by an adapter 52 made with a through hole, and the outer side of which is made with a rectangular flange 53, which enters the rectangular cover, ensuring reliable tight closing of the housing 1. When the housing is installed in the place of its permanent location in the ground, the walls of the glass serve as the formwork and the space 54 between the inner 49 and the outer 50 nozzles are filled with a combined filler. So the lower part is filled with heavy concrete 55 for strength and weight, and the upper part with lighter polyurethane foam 56 for thermal insulation. Since the secondary sump 27 is made conical and located in the center of the body, and the equalizing, activation tanks, aeration tank and the sludge stabilization chamber are located on the periphery of the secondary sump, “round”, the walls separating all tanks perform the function of additional stiffeners, and in connection with secondary sump form a single rigid frame structure.

Proposed according to the invention a method for self-regulation of the operation of the device is carried out as follows through the proposed device for wastewater treatment.

When choosing the size of a device, they always know in advance how much wastewater it should be designed for. Based on the estimated composition of the wastewater, set the duration of two alternating phases of operation of the device sequentially alternating first and second phases. The contaminated wastewater through the inlet pipe 2 of the wastewater supply of the housing 1 is fed portionwise to the equalization tank 3, in which the process of treating wastewater with activated sludge begins, due to the supply of air to the second phase of the device through aerators 4. The wastewater flows by gravity as it flows in communicating vessels, from the equalization tank 3 to the activation tank 7 through the overflow pipe 5. The activation tank 7 is an activation tank, as the water undergoes a small bubble oh aeration in the second phase produced fine bubble aerator 8. From the water tank 7 by gravity flow into the well tubular 9 where it also aerated and pumped into the main aeration tank 21 where the water is subjected to fine bubble aeration, included in the first phase of operation. The air is constantly supplied to the tubular well into the continuously working main pump and the internal aerator of the tubular well from the turbophase distributor. According to the law of communicating vessels, water flows from the aeration tank 21 by gravity into the lower part of the secondary sump 27, where the level gradually rises and, reaching the output filter 32, is discharged through the outlet pipe 33 for use in household needs. After the flow of water into the tubular well stops, the water is completely pumped out, which leads to the main pump switching to idle mode, as a result of which the purified water is discharged outside the installation and the water treatment process is continued independently in all tanks until the next portion of wastewater enters the equalizer the reservoir through the inlet pipe or before the start of the operation of the recirculation pump in the second phase, as a result of these revenues, the operation of the main pump and the removal of purified water beyond ely installation in amounts not more received portions of wastewater. After the first phase has passed, the air supply to the first phase distributor is stopped, the second phase is turned on, i.e. air is supplied to a second phase distributor. At this time, aeration in the aeration tank is turned off, the aerators of the mixer of the sludge stabilization chamber and the large-bubble aerator of external blowing of the tubular well are turned off. In the second phase, they include agitators-aerators in the equalization tank and a fine-bubble aerator in the activation tank, supply air to the recirculation pump, to the secondary sump circulation pump, the biofilm aerator-breaker and pump, the biofilm remover, pump the suspension of water with excess parts of the aeration tank into the sedimentation chamber of the sludge stabilization chamber. All this helps to raise the water level in it and promotes gravity flow of displaced water into the equalization tank via overflow pipe 41, and then through the overflow pipe 5 by gravity to the activation tank, and when water reaches a gap of 19 and above it, water will enter the tube well, which will lead to restore the operating mode of the main pump, i.e. the main pump will pump water from the tubular well. At this moment, the two airlift pumps, the main and the recirculation ones, will work in the opposite direction, and initially the performance of the recirculation pump is slightly higher than the performance of the main pump, but due to changes in levels in the aeration tank and the activation tank, the performance of the main pump grows and the recirculation pump decreases, this leads to a decrease in speeds changes in levels and their stabilization at a certain point, where the performance of these two pumps becomes the same. At the same time, the biofilm remover pump, the biofilm aerator-breaker, i.e. the secondary sump is cleaned, this leads to the filling of the secondary sump with activated sludge from the bottom area of the aeration tank according to the law of communicating vessels and the activation of denitrification processes in the secondary sump. This process ends when the secondary sump level decreases below the suction end 36 of the biofilm remover pump and it goes into idle mode, sludge settling begins and it is forced into the aeration tank by the secondary sump circulation pump 25, which has not previously had a significant effect on the device processes. The circulation pump pumps clarified water from the middle zone of the aeration tank to the secondary settler sedimentation tank and from it to the bottom outlet zone of the secondary sedimentation tank, squeezing out settling sludge, since the end of the settler is located in the lower zone of the secondary sedimentation tank, where silt settles and cleans the secondary sedimentation tank from it. In the second phase, the main and recirculation pumps are turned on in the opposite direction. The ratio of their performance allows you to determine the lower level of the aeration tank, at which the performance of the two pumps are equal, because airlift pumps greatly change their performance when the height of the liquid column is changed, and the working level is determined not by the sensor, but by the design of the tubular well, and it is impossible to pump water from the equalization and activation tanks below the made slot 19. This action is the self-regulation of the process of the device in the second phase. For the correct operation of the device, it is necessary to select the capacity of the recirculation pump at operating levels slightly more than the performance of the main pump. The first phase includes sludge stabilization chamber aerators and aeration tank aerators, as well as a large-bubble aerator for external blowing of a tubular well for mixing water with sludge in the activation tank and supplying this mixture to the aeration tank, which excludes (as well as exceptions) the ingress of large inclusions into the tubular well. The second phase includes aerators of the equalization tank, activation tank, sludge and water recirculation and circulation pumps and a biofilm remover and aerator-breaker for recirculating sludge and cleaning the secondary sump. With a large simultaneous discharge of wastewater, which leads to a rise in the leveling tank to the emergency sensor, the device is forcibly transferred to the first phase and the timer of the first phase is reset to zero, this leads to an increase in the device’s performance, because due to the features of the operation of airlift pumps, those. the main pump, with a high height of the liquid column, their productivity is significantly increased. This happens very rarely, but if the alarm triggered, it leads to the forced activation of the first phase and the zeroing of the countdown timer of the first phase. Airlift - the main pump at this level, according to experimental data, has a capacity of more than three times greater than the operating level, which will quickly automatically lower the level below the emergency.

Experimental work on the implementation of the method, carried out with a percentage level of wastewater pollution, showed the achievement of the technical task and ensuring the production of clean water without suspended solids, suitable for use in household needs and for subsequent cleaning and disinfection in recycled water supply systems. The device very well tolerates the presence of animal hair, fat and various debris in wastewater, which was previously the cause of the failure of many wastewater treatment devices.

The device and the method of its operation according to the invention are energy-saving, and the device is reliable in operation and easy to manufacture and maintain. Devices made in accordance with the invention and operating according to the proposed method have shown effective operation in any situations involving the loading of waste water.

Claims (5)

1. A method of wastewater treatment, characterized in that the duration of two alternating phases of the device is pre-set, air is supplied from the turbophase distributor to the constantly working main pump and the internal aerator of the tubular well, in the first phase, air is supplied to the first phase distributor, from where it is distributed fine bubble aeration tank aerator, aerator-mixers of the sludge stabilization chamber, large bubble aerator of external blowing of a tubular well, wastewater is supplied portionwise through the inlet to a leveling tank containing activated sludge, followed by their overflowing into an activation tank, also containing activated sludge, a suspension of partially treated wastewater with activated sludge is lifted with a large-bubble aerator of external blowing of a tubular well with its subsequent passage by gravity into a tubular well and its subsequent pumping from the bottom zones of the tubular well with the help of the main pump into an aerated aeration tank, from where water flows into the secondary sump according to the law of communicating vessels, where it is defended, and after the water level in the secondary sump rises above the cut of the outlet filter pipe, gravity remove purified water through the output filter with the outlet pipe outside the device, and after lowering the level of treated wastewater in the activation and equalization tanks to the working level and stopping the flow of suspended particles with partially purified water the contents of the tubular well are pumped out into the tubular well and the main pump is switched to idle, as a result of which the removal of purified water is stopped and the limits of the device continue the process autonomously in all capacities of the device until the next portion of wastewater is supplied to the equalization tank, as a result of which the main pump resumes and the purified water is drained outside the device in an amount not exceeding the received portion of wastewater after the completion of the first phase switch the operation of the device to the beginning of the second phase, stop the air supply to the first phase distributor and supply air to the second phase distributor, stop aeration in the aeration tank, turn off the air agitators of the sludge stabilization chamber, coarse-bubble aerator of external blowing of a tubular well, include agitators-aerators in the equalizing tank, fine-bubble aerator in the activation tank, supply air to the recirculation and circulation pumps of the secondary sump, to the biofilm aerator-breaker and to the biofuel pump , they recycle the suspension of partially purified water with excess sludge from the bottom of the aeration tank into the sedimentation chamber of the sludge stabilization chamber by a recirculation pump, facilitating the flow of water water with part of the suspended suspension by gravity first into the equalization tank, and then into the activation tank, which either leads to the restoration of the main pump operating mode from idle mode or to the main pump continuing to work in the operating mode, water is pumped from the tubular well the main and recirculation pumps work counter-clockwise, at the same time in the second phase they clean the secondary sump by turning on the biofilm removal pump, the secondary sump circulation pump and the aerator the biofilm agitator, and when the water level in the secondary settler drops below the cut-off of the nozzle of the biofilm remover pump, this pump goes into idle mode, the process of settling the sludge and squeezing it out into the aeration tank by the secondary settling pump by pumping the clarified water from the middle zone of the aeration tank to the secondary sedimentation tank moreover, the secondary sump circulation pump is turned on at the beginning of the second phase, and when a large volume of incoming wastewater is supplied, the level in the equalizing reserve the area rises, an emergency sensor is triggered, the device is forcibly transferred to the first phase of operation and the timer of the first phase is reset. 2. The method according to claim 1, characterized in that the performance of the recirculation pump for transferring sludge from the aeration tank to the sludge stabilization chamber at the beginning of the second phase is chosen more than the capacity of the main pump. 3. The method according to claim 1, characterized in that during the second phase the lower water level in the secondary sump and the aeration tank is fixed with equal performance of the main and recirculation pumps. 4. A device for wastewater treatment, comprising a housing with a sealed cover, which contains an equalizing reservoir containing activated sludge, equipped with an inlet sewage pipe, an emergency sensor, aerators-mixers and communicating with the activation tank through an overflow pipe located in the bottom zone of the separation wall equalizing and activation tanks, while in the activation tank there is a fine bubble aerator, a tubular well with a main pump and an internal aerator, a bubble-bubble aerator of the external blowing of the tubular well, the walls of the tubular well in the middle zone being perforated and surrounded on the outside by a shell made in the form of a cylinder with a lower end located in the socket, the smaller base of which is hermetically fixed to the outer wall of the body of the tubular well, an aerotank equipped with a fine bubble an aerator, a sludge recirculation pump and a partially purified water circulation pump, a secondary settling tank in communication with it, equipped with a flow damper of purified water, an outlet filter, an outlet pipe of pure water, a biofilm aerator-breaker, a biofilm removal pump made in the form of a J-shaped pipeline, one end of which is located below the outlet filter zone and the second end is above the outlet filter zone in the upper parts of the aeration tank, a sludge stabilization chamber equipped with a sludge damper and aerator-mixers located in its bottom region, while the sludge stabilization chamber is interconnected with a leveling tank by means of an overflow pipe a flap, a control unit, a compressor and turbophase distributors of the first and second phases connected by air ducts for supplying air to aerators and pumps. 5. The device according to claim 4, characterized in that the housing is made of plastic in the form of a glass and has a cylindrical or rectangular shape, and the walls of the glass are made of two concentrically mounted coaxial pipes, internal and external, interconnected by stiffeners, while the end the zone of the inner pipe is covered by an adapter with a through hole, the outer side of which is made with a rectangular flange, and the cavity between the outer and inner pipes is filled with layers of fillers, the lower layers heavier, for example concrete, and the upper ones, light and heat-saving, for example polyurethane.

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