A method and apparatus for wastewater treatment, the device for aeration of waste water

 

(57) Abstract:

The invention is intended for cleaning and aeration of wastewater. Wastewater treatment is continuous passage of several stages of processing, with the specified passage is regulated by the device management process and controlled by sensors. Processing is conducted on the mechanical preparatory steps, on the steps of the primary flotation, two-stage biological treatment stage and on-stage cleaner cell flotation. Stage primary flotation and biological treatment with corresponding gazivode mixers, and stage of the primary flotation stage biological treatment and stage cleaner cell flotation equipped with foam separators of solid material from the waste chute. Through the water-gas mixing and bypass the clarified water in a separate stage served the clarified water from the outlet of the tank. The method is also suitable for use in transportable device interlocked design. The invention provides a high degree of purification of any wastewater fluctuations in the quantities of wastewater and changing the ingredients. 3 c. and 28 C.p. f-crystals, 7 Il.

Known methods of sewage treatment are carried out using several methods to lighten mainly in fixed installations. Their constructive implementation is costly and cumbersome and is bound to the constant ingredients and quantities of wastewater. In transportable devices in the foreground in General is a filtering technique, along with which includes biological and chemical treatment. Thus the scope is restricted to one type of wastewater. All filter equipment, operated separately or in areas of paramount importance, leads to increased pollution in the area, set aside. Mechanical filter what their stage of purification lead to increased mechanical water pollution solid substances in the form of hard and living matter, such as biochem, fungi and parasites. Chemical cleaning by impurities results in a wide preliminary exclusion of all other polluting materials to the excessive release of a special waste.

Each method by itself, if it is used purposefully and as needed for a particular wastewater, gives good results in certain applications. But it still manages to achieve a satisfactory General cleaning, meeting the rules of entry of treated wastewater into a water body, in particular, with different requirements for waste water.

A known method of purification of wastewater containing biodegradable substances, including continuous wastewater treatment on the mechanical stage of the preparatory purification using a settling tank for separating heavy material, the separation of the first and second stages of flotation, which is the separation of solid foam material formed using the water-gas mixers, stage of biological treatment, as well as a device for treatment of wastewater containing the preparatory stage of the mechanical treatment in the form of a sedimentation tank for heavy is SU 1446112 A, C 02 F 1/24, 1988).

It is also known a device for the aeration of waste water, comprising a container with an inlet for light protection, drainage of waste liquid and a supply line for water from the nozzle element, communicating with light environment (SU 103769 A, C 02 F 3/16, 1956).

The basis of the invention is cleaning any wastewater which as a product of mass production would be suitable for use in transportable device interlocked construction or for stationary use in a modular design, while allowing for a wide process management, self-adapting individual cleaning methods to new conditions, fluctuations in the quantities of wastewater and changing the ingredients.

According to the invention this task is solved in that the waste water is subjected to aerobic and then anaerobic biological treatment with repeated circulation at each stage of purification, and waste water discharged from the aerobic biological purification stages, together with is supplied from the corresponding water-gas mixer with a mixture of technical oxygen and clarified water is back on aerobird sensitive elements, and the resulting values are sent to the processing in the device management process with the subsequent regulation of the indicated passage.

In a preferred embodiment, the device water-gas mixers connected to the return pipe to the bypass for clarified water coming from the exhaust tank clarified water to the assembled tank. In a favorable embodiment, the separator fine particulate material is rotating in a cylindrical pipe spiral brush with step spiral turns, decreasing towards the flow of waste water and the pipe wall is equipped with a number located in a grid of holes and openings. In one form of execution of the invention the aerobic biological purification stage is formed by a vertical cylindrical closed hollow body, which is provided with inlet waste water in the zone of the bottom, the water drained in the lid and a bypass connecting the upper area of the hollow body with the area of the bottom. According to another variant embodiment of the invention for aeration of wastewater is a device with a closed tank top inlet for easy environment, the lower inlet to the mixing fluid inlet for water from the nozzle element, Out of the legs, United with her body nozzle and mounted to allow the head and between the open top to allow the head and body of the nozzle formed by the annular reflective camera, from which coplowe discharge space leaves an annular nozzle with adjustable width to allow the slit made in the form of a lateral surface of a truncated cone.

The device employed by the proposed method allows you to log data control and implement continuous production control through the accumulation, processing and remote data transmission. The necessary chemicals can be applied gradually and purposefully, and resulting in some circumstances the sludge from the special waste can be removed separately. Operating costs when using the method according to the invention, are small, because the process takes place without special maintenance and all components do not cause, and if called, minor wear.

The process according to the method and examples of execution of the device is shown in the drawings and described in more detail below, in this case:

Fig. 1 shows the schematic layout of the transportable device interlocked design, the ez separator fine particulate material;

Fig. 4 is a schematically longitudinal section of the aerobic biological purification stages;

Fig. 5 is a simplified depiction of the aeration device;

Fig. 6 is a longitudinal section of the aeration device;

Fig. 7 is an enlarged image of point A in Fig. 6.

It is shown in Fig. 1 interlocked installation represents a collection tank 1 capacity, for example, 30 m3with upstream separator 2 large solid material. The purified waste water is fed into the separator 2 by collecting pipe 3. The separator 2 large solid material, it is expedient to equip the grid with a cell size of from 3 to 5 mm. Sensitive element 4 sends the measurement data of the water level in the collecting tank 1 in the device 22 process control, and the pump 5 pumps waste water pipeline 6 into the separator 8 fine particulate material with a grid cell size of 1 to 2 mm in the first zone interlocked installation. Hence, the waste water is separated from the major components, is fed into the precipitation tank 12 for heavy material, where the substance is heavier than water 1-2 mm lowered into the well 14 heavy materials from which they are manually or during the management process periodically removed through valve 16.

Waste water from the sedimentation tank 12 for heavy material is directed through pipe 28 into the mixing tank 30 primary flotation. Shortly before entry into the mixing tank 30 enriched air water to sewage mixes with water first water-gas mixer 32, below called "actor". Tector 32 operates on the principle of the bypass and receives the mixing water outlet for clarified water tank 34 flotation, and the air compressor 36. Water, enriched air bubbles, flows through the reaction volume 38. Thus formed on the surface of allocation foam solid materials, which during the control process after a certain period of time are moved through a stroke in the first the gutter 40. Through the outlet reservoir 42 primary flotation waste water is directed to the aerobic biological with Biologicheskie stages of treatment received only dissolved substances. The efficiency of biological treatment stages many times enhanced by thorough mechanical pre-treatment. Aerobic biological purification stages 44, constituting a filter with a movable underlying layer, the waste water is evacuated tube system 45 is returned through the pump 46 and the pipe system 47 to the treatment stage 44 and continuously supplied through the second Tector 48 technical oxygen from an oxygen cylinders 50 and the mixing water outlet for clarified water tank 34 cleaner cell flotation. Waste water can circulate up to ten times per hour and reaches thus the regulated oxygen enrichment, many times the normal saturation. All actory work, as mentioned above, in the bypass mode to ensure that the operation of pressure reducing valves without interference. Dead bacterial mass on aerobic biological purification stages 44 accumulates on the surface in the form of allocations foam solids and in the course of the process control moves after a certain period of time with the help of a stroke, mainly in the form of a chain of a stroke, the second a gutter 52. Waste water is directed now cheoy stage purification pump 55 is a continuous circulation of clarified water and monitoring the oxygen content by means of the sensing element 56.

After treatment on the anaerobic biological purification stages 54 waste water pipe 58 enters the mixing tank 60 cleaner cell flotation. Shortly before entry into the mixing tank 60 third Tector 62 adds to the waste water mixture clarified water and air. Then the waste water is fed into the reaction volume 64 cleaner cell flotation, in which the surface again there is a selection of solid foam material. The sensing element 66 controls the water level. After a certain period of time during the control process the stroke moves the selected foam solid material in the third waste chute 68. From the reaction volume 64 purified waste water enters the outlet for clarified water tank 34 cleaner cell flotation, where the sensing element 72 for pH control of the concentration of hydrogen ions, and other sensitive elements 73 and 74 control the oxygen content and water temperature. The level controller 76 provides a flow of purified water and the pipe 70 and through the valve 78 back into the collection tank 1, and for water-gas mixers 32, 48 and 62 (rectory 1-3) as the mixing water is allocated an appropriate amount of purified water. by a constant.

The device 22 process control monitors and records all measured values, such as water level, oxygen, pH, temperature controls, in addition, certain functions of pumps, dosing of lime and acid, the dosage of oxygen, switching valves, tectorum, strokes for foam solid material and waste mass production process, and raises the alarm when the violation mode and prevents in the event of an alarm output is not sufficient purified water.

The separator 8 fine particulate material is according to Fig. 3 in fact rotating spiral brush 11, concentrically mounted in the cylinder tube 9. Spiral brush 11 has a step, beginning with its lower free end and decreasing to its other end, on which is installed the drive motor 19 with gear, i.e., the step of turns of the spiral brush 11 is continuously decreases towards the flow of waste water. The cylindrical wall of the pipe 9 is equipped with a number placed in a grid of holes and openings (not shown), which are adapted to the maximum size of particles separated solid materials.

Tube 9 is concentrically installed in the pipe-obecnej water. Power pipe 15 is connected to the separator 2 large solid material.

The diameter of the tube-shell 13 is selected so that the distance to the outer surface of the inner tube 9 with holes and openings allows to provide a circular distribution of the waste water supplied through vodopriemnye box 21. The space 27 between the inner pipe 9 and the pipe-casing 13 is sealed at the lower end 23, and the inner pipe 9 at the lower end is open and serves as an outlet 25 for water. In the upper part of the inner pipe 9 and pipe coating 13 on the one hand provides an output 17 for sludge.

The purified waste water for power tube 15 and vodoprivredu duct 21 is fed into the intermediate space 27 between the tube-shell 13 and the tube 9 is placed in the grid holes. Waste water enters through the slots and openings in the area of the spiral brush 11, driven in rotation of the driving motor 19. At that time, as the water flows towards the lower free end of the pipe 9 to exit 25, solid materials, particularly smaller ones, hold the turns of the spiral brush 11 and transported upwards. Through in-between the turns of the spiral of solid material, the amount of which uvelichivaet the I and in aggregated form are ejected through the outlet 17 for sludge. Due to the rotation of the spiral brush 11 has a self-cleaning effect. Operation provides gentle removal of solid materials. Wear spiral brush 11 is lower than in flow-through mode.

Aerobic biological purification stage 44 is formed according to Fig. 4 vertically standing cylindrical closed hollow housing 31 with inlet 33 of waste water in the area 35 of the bottom, a drain 37 in the cover 39 and bypass 43 connecting the upper part 41 of the hollow housing 31 with an area of 35 of the bottom.

The hollow housing 31 may be a cylinder of circular cross section, which is in the upper third or quarter of the cylinder is greatly increased with the transition to the upper part 41 is made in the form of a funnel. Supply of 33 waste water goes into the area 35 of the bottom pressure in the discharge chamber 49, the outer surface which has a lot of small outlet openings 51. The free section of the supply pipe 33 wastewater exceeds the sum of the areas of cross-sections of the outlet openings 51.

The bypass 43 connecting the upper part 41 of the hollow housing 31 with an area of 35 of the bottom, includes a circulation pump 57, causing the circulation of the waste water in the direction of arrow 63. The input 53 of the bypass is located so that it sucks the water 59 delivered 33 waste water and by-pass 43, through which may flow dosages pH, air, oxygen or other special substances, the number of which is determined by a number of sensitive elements 65, managed computing device.

In the hollow housing 31 is loaded special solid materials as a carrier of bacterial strains, which should hover in the water flow in the direction of arrow 67. Bacteria have the possibility of free development on the surface of solid materials. Increased cross-sectional area in the upper zone 41 provides less flow rate, indicated by the shorter arrow 69. Low speed flow makes possible the lowering or delaying solid materials with bacteria that are not washed out through a drain 37, bypass 43 return to the area 35 of the bottom. Otlichayushiesya at the bottom of the hollow housing 31 or accumulating in the area 35 of the bottom of the solid materials savariaud waste water flowing from the bypass 43 and the outlet port 51 of the pressure of the exhaust chamber 49. Due to the ratio of output holes 51 and the flow openings of the supply pipe 33, the water that comes out of the outlet port 51 under pressure and can thavirat and raise settled at the bottom tardistraveler devices (not shown), managed computing machine.

In the installed vertically and closed, having the form of a cylinder or a rectangular parallelepiped vessel 101 (see Fig. 5), the cover 102 is provided a supply 103 and bottom 104 near the outlet 105 of the inlet pipe 106, which is in the upper third of the tank 101 and is essentially cylindrical nozzle element 107. The processed fluid is directed through the inlet pipe 106 in the nozzle element 107. In the upper part 108 of the container 101 is an easier environment, which can be a liquid or gas and is fed through inlet 103., if the device works as a mixer. In the lower portion 109 of the vessel 101 is accumulated processed in the nozzle element 107 liquid, which is discharged through the outlet 105.

The position of the level between the light environment in the zone 108 and severe environment in the zone 109 is controlled by the level switch 110, which regulates the inflow of light environment through the switching electronics (not shown) to set the level between the minimum mark 111 and a maximum elevation of 112.

Cylindrical nozzle element 107 (Fig. 6) consists of a stem 116 and the housing 118 are rigidly connected to each other, and screwed composite head 120. This sostenere corresponding to the outside diameter of the inlet pipe 106, which is connected to the housing of the nozzle 107 in the area of the bottom to allow the legs 116. Directly above the end of the inlet pipe 106, the hole 114 is extended through the first groove 124 and forms thereby the first distribution cavity. Closing the cap 122 is located on the short pipe piece 123, forming with the top edge of the annular groove 124 of the circular edge of stall. From the annular groove 124 in the axial direction of the nozzle body 107 leaves a lot of holes 126, ending in an extended second annular groove 127 in the housing of the nozzle. The second annular groove 127 is adjacent set of apertures 128 of smaller diameter, thereby forming the other edge of stall. These openings 128 extend in the annular reflective chamber 129 to allow the head 120. The top edge of the axial hole 114 of the housing 118 of the nozzle is in the form of a lateral surface of a truncated cone and forms the lower part of the nozzle 130. The upper portion 131 of the nozzle with its flange 132 and a wide rubber ring 133 is sandwiched between to allow the cheek 134 and svintsovaya cheek 135 and forms a nozzle head 120, which is screwed onto the housing 118 with the laying of the rubber ring 136 circular cross-section. Tightening svintsovaya cheeks 135 set C is th vertical elastic movement. This ensures the ability of self-purification to allow the slit 137. When the blockage part to allow the slits 137 upper portion 131 of the nozzle may rise and so to extend the nozzle orifice, which, in spite of the contamination, again reaches the required number of environment and pollution washed extended through the nozzle orifice. After cleaning, allow the slits 137 initial width of the opening is restored due to the elasticity of the rubber ring 133.

As can be seen from the enlarged fragment of Fig.7, the slope of the surfaces to allow the slits 137 chosen so that the slot width decreases towards the top of the upper portion 131 of the nozzle. In addition, the upper edge portion of the nozzle is equipped with a chamfer 138 stall. Thanks to the jet nozzle 130 takes the form of a lateral surface of a cone directed its top to a point lying on the Central axis of the nozzle 107. In part of the hole 114 of the housing 118 of the nozzle, designated as coplowe the discharge space 140, a coupling 141, the lower end of which is tapered and terminates directly above one or more deployme outputs 142. The drawing for greater clarity, shows only one nozzle outlet 142. However, it is advisable to provide several segment and installed at the entrance legs 116 opposite the inlet pipe 106, prevents the lower end of the nozzle discharge space 143 splashes environment back in coplowe the discharge space 140, which is achieved through the implementation of it in the form of a spherical segment, in combination with a conical contraction coupling 141.

When using the device as a mixer fluid under pressure is supplied through the supply pipe 106 in the nozzle element 107 and passes through the first annular groove 124 and a few holes 126 in the second annular groove, and then through the openings 128 in the annular reflective chamber 129. These annular grooves and holes are installed sequentially in the casing of the nozzle 107. In places of transition between the ring grooves and holes provided in the edge of stall, breaking the molecular structure of the liquid. Repeatedly passing through the edges of the stall before passing through an annular nozzle, the liquid due to substantial loosening of the molecular structure in the best way prepared to accept or to give other molecules of the medium in the nozzle exhaust area.

To the annular reflective chamber 129 is adjacent an annular nozzle 130, jet slot 137 which sugioka. The nozzle creates aimed at middle zone nozzle discharge space and having the form of a lateral surface of a cone jet coming from different directions.

This is almost twice the speed of the collision. The escaping jet creates a suction effect in the direction of arrow 144, resulting in a lighter environment (liquid or gas) is sucked through the open top of the nozzle head 120 from the upper zone 108 (Fig. 5), is mixed with the medium emerging from the reflective chamber nozzle 129 and 130, is blown in the direction of the nozzle outlet 142 and sent to the lower zone 109.

When using the device for separating liquids of different density or gases and liquids mode of operation is carried out by sucking heavy medium on the outlet 105 and light environment on the cart 103 (Fig. 5). Due to the nozzle element 107 partial vacuum environment is sucked through the inlet pipe 106. An annular nozzle 130 creates in the nozzle discharge space 140 jet in the form of a lateral surface of a cone. The current high speed collision and releasing energy to create a cloud environment with a hacked molecular structure, obesience 144. Particles severe environment follow the current from the side of the nozzle outlet 142 exhaustion and fall into the lower zone. Suction light and heavy environment of the upper or lower zones, respectively, 108 and 109 is controlled by the level switch 110 and is adjusted so that the level between these environments were maintained within the acceptable range indicated by the minimum 111 and maximum 112 marks.

The bypass return the clarified water through the bypass line 82 in the process of cleaning allows you to adjust the size and number of bubbles and, thus, the flotation in the mixing tank 30 primary flotation, aerobic biological purification stages 44 and into the mixing tank 60 cleaner cell flotation.

1. The method of purification of wastewater containing biodegradable substances, including continuous wastewater treatment on the mechanical stage of the preparatory purification using a settling tank for separating heavy material, the separation of the first and second stages of flotation, which is the separation of solid foam material formed using the water-gas mixers, stage of biological treatment, characterized in that the degree of mechanical the material, biological treatment is carried out by aerobic and then anaerobic treatment with repeated circulation at each separate stage of filtration, adjustable during the process through the bypass, and the effluent circulating in the aerobic stage of purification, is mixed with water supplied from the gas mixer mix of technical oxygen and clarified water, and the passage of waste water through a separate stage of processing supervise and regulate through sensitive elements and devices process control.

2. The method according to p. 1, characterized in that the first stage of flotation includes a mixing tank and connected with it the reaction chamber, the waste water prior to introduction into the mixing tank is injected enriched air clarified water through a water-gas mixer.

3. The method according to p. 1 or 2, characterized in that the waste water from the reaction chamber of the first stage of flotation is directed into the exhaust tank.

4. The method according to one of paragraphs.1 to 3, characterized in that the second stage of flotation includes mixing reservoir and reaction chamber, the waste water after exiting the anaerobic biological purification stages served in seceret water-gas mixer introducing the clarified water, enriched air.

5. The method according to one of paragraphs.1 to 4, characterized in that the waste water from the mixing tank served in the reaction chamber of the second stage of flotation.

6. The method according to one of paragraphs.1 to 5, characterized in that the solid foam material, selected in the reaction chambers of the first and second stages of flotation and stage aerobic biological treatment, is subjected to biological treatment, is subjected to biological treatment, corresponding in composition to foam and used to the bacteria.

7. The method according to one of paragraphs.1 - 6, characterized in that the circulation of the waste water in the aerobic biological purification stages produce the required adjustment to the level of oxygen enrichment, multiple normal saturation and anaerobic biological purification stages oxygen removed approximately to zero.

8. The method according to p. 7, characterized in that the waste water circulate up to ten times in 1 hour

9. The method according to one of paragraphs. 1 to 8, characterized in that the stop the return of water from the outlet of the tank clarified water team in the reservoir and/or block the sewage piping outlet tank clarified water automatically when the failure to comply with the specified pair is od containing the preparatory stage of the mechanical treatment in the form of a sedimentation tank for heavy material, the machines of the first and second stages, water gas faucets, installation of biological treatment, characterized in that it is equipped with separators large and small particulate material, a reservoir tank, the outlet tank clarified water and a by-pass pipeline, representing a bypass leading from the outlet of the tank clarified water to the assembled tank, and the installation of biological treatment is a step aerobic and step anaerobic biological treatment, and a water gas faucets connected with an overflow pipe.

11. The device according to p. 10, characterized in that the precipitation tank for heavy material provided with overflow device and connected to it by a by-pass line that goes to the assembled tank.

12. The device under item 10 or 11, characterized in that the aerobic biological purification stages and anaerobic biological purification stages installed managed during the process of heating rods for temperature control.

13. Device according to one of paragraphs.10 to 12, characterized in that vapores waste pipe or through the bypass pipe into a collecting tank.

14. Device according to one of paragraphs.10 to 13, characterized in that the separator fine particulate material made in the form prescribed in the cylinder tube rotating spiral brush, step turns of which decreases towards the flow of waste water, and at the pipe wall is made with a number of holes and openings in the grid.

15. The device according to p. 14, characterized in that the tube with the holes in the grid concentric installed in the pipe-shell, in which the Central zone is supplied with power by a pipe.

16. The device under item 14 or 15, characterized in that the annular space between the inner pipe and the pipe-casing on the lower end sealed.

17. Device according to one of paragraphs.14 to 16, characterized in that the jacket pipe at the upper end is hermetically isolated from the pipe, which is connected with the outlet for sludge, hermetically isolated from the pipe shell.

18. Device according to one of paragraphs.10 to 17, characterized in that the step aerobic biological treatment has a vertically mounted cylindrical body, provided with a supply of waste water in the zone of the bottom, a drain in the cover or in the upper part of the body with a by-pass connecting the upper part of the housing with sonoyta in the zone plate has a pressure outlet chamber with outlet holes, thus the supply of waste water is connected with the pressure outlet chamber, and the cross-sectional area of the outlet supply waste water is greater than the sum of the areas of cross-sections of the outlet openings of the chamber.

20. The device according to PP.10 to 19, characterized in that the cross-sectional area of the upper part of the body aerobic treatment above login bypass, larger cross-sectional area of the lower zone.

21. Device according to one of paragraphs.10 to 20, characterized in that the bypass installed the pump with adjustable flow rate.

22. Device according to one of paragraphs.10 to 21, characterized in that the bypass and/or supply wastewater associated with the injection device.

23. Device according to one of paragraphs.10 to 22, characterized in that in the case of aerobic purification of installed sensors.

24. Device for aerating waste water, comprising a container with an inlet for light protection, drainage of waste liquid and a supply line for water from the nozzle element that communicates with easy, medium, characterized in that the nozzle element is designed in the form of a cylinder with an axial hole having a foot connected with her body and planted nozzle head, prra, in coplowe discharge space leaves an annular nozzle to allow the slit formed by the lateral surface of the cone and adjustable in width, the supply for the light environment is installed in the upper part of the vessel, and the drainage of waste liquid is in the bottom of the tank.

25. The device according to p. 24, characterized in that the jet slit is made narrower toward the exit nozzle and the edge of the upper part of the nozzle provided with a chamfer to disrupt the flow.

26. The device under item 24 or 25, characterized in that it is provided with a rubber ring attached to the threaded connection between the body of the nozzle and allow the head and allows to adjust the size to allow the cracks.

27. Device according to one of paragraphs.24 to 26, characterized in that the upper part of the nozzle is installed to allow the cylinder through a wide rubber ring with the possibility of vertical elastic movement.

28. Device according to one of paragraphs.24 to 27, characterized in that the nozzle discharge space is set sleeve, the lower end of which is made tapering.

29. Device according to one of paragraphs.24 to 28, characterized in that the housing of the nozzle below the tapering end of the coupling is made of one or more nozzle is Alzenau groove and above it the closing cap, forming with the top edge of the annular groove of the circular edge to disrupt the flow, while the inlet pipe terminates in the annular groove of the leg nozzle.

31. Device according to one of paragraphs.24 to 30, characterized in that the housing of the nozzle has an additional annular groove chamber connected with the main annular groove through holes formed in the leg and forming with the additional annular groove of the many edges of stall due to a change in cross-section.

Priority points:

14.06.91 on PP.1 - 13;

25.11.91 on PP.14 - 17;

11.12.91 on PP.18 - 23;

23.04.92 on PP.24 - 31.

 

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