KR20110096013A - Treating method for swage-wastewater of high concentration using ultra-fine bubble as well as dissolved oxygen tank - Google Patents

Abstract

PURPOSE: A high concentration wastewater treatment method using ultra-micro bubbles and a dissolved oxygen tub is provided to secure the dissolved oxygen concentration greater than 1.0mg/L. CONSTITUTION: A high concentration wastewater treatment method using ultra-micro bubbles and a dissolved oxygen tub comprises the following steps: forming plural dissolved oxygen tubs(110) inside an aeration tank(100); and dispersing the ultra-micro bubbles(34) generated from an ultra-micro bubble generator into water inside the dissolved oxygen tubs using plural dispersing devices. The dispersing devices include a collision inclined plate, a jet stream formation neck, and an outlet.

Description

Treating method for swage-wastewater of high concentration using ultra-fine bubble as well as dissolved oxygen tank}

The present invention is an ultra-fine strength in a high concentration sewage treatment process of more than 10,000 mg / L mixed liquor suspended solids (MLSS), such as livestock wastewater treatment plant, leachate treatment plant, food resource filtrate treatment plant, sanitary manure treatment plant, wastewater end treatment plant, sewage treatment plant, etc. The present invention relates to a method for treating high concentration sewage water by maximizing dissolved oxygen concentration by using a bubble and dissolved oxygen tank to improve organic decomposition and nitrogen removal efficiency by microorganisms, and more specifically, a blower and an acid provided at the lower side of the aerobic tank. By aeration of the coarse bubbles generated from the engine in the aerobic tank, oxygen is delivered to the aerobic microorganisms while preventing activated sludge from being deposited in the lower part of the aerobic tank; Inside the aerobic tank, a plurality of dissolved oxygen tanks, which are closed on the upper side and open on the lower side, constitute the ultra-low intensity bubbles generated from the pressure-dissolved method or the atmospheric pressure type ultra-miniaturized bubble generator, and the impact slant plate and the jet stream forming tree. And dispersing the dissolved oxygen bath in water using a plurality of dispersing devices including a jet port, thereby increasing the dissolved oxygen concentration of the dissolved oxygen bath; A denitrification circulation tank is connected after the aerobic tank, and the nitrified liquid nitrified in the aerobic tank and the dissolved oxygen tank is naturally transported to the denitrification circulation tank via a nitride liquid transfer channel provided under the separation wall; The nitriding liquid transferred to the denitrification circulation tank is a denitrification reaction and gravity precipitation under anoxic conditions inside the denitrification circulation tank, whereby nitrogen components and water pollutants are removed; Dissolved oxygen bath; Denitrification circulation tank; And it is characterized in that it comprises a pressure-dissolved to atmospheric pressure ultra-fine foam generator, suspended solids (MLSS) 10,000 mg / L or more high concentration sewage treatment method.

Due to the continuous industrialization and urbanization, environmental pollution is getting serious day by day, and the shape of discharged sewage, wastewater from plant and livestock farms, leachate, and sewage (hereinafter referred to as 'wastewater') is also very diverse. Facilities are also being upgraded and treatment costs are increasing. Nevertheless, water pollutants in untreated sewage water are introduced into streams, lakes, and other water sources, causing many problems in efficient water quality management.

Current treatment technologies for sewage water include physicochemical methods such as sedimentation, pressurized dissolved air flotation (DAF), filtration, chemical coagulation, and oxidation treatment. There is a biological treatment that removes contaminants. The physicochemical treatment method can be installed and used additionally without major changes in the existing treatment facilities, and has the advantage of obtaining stable and high efficiency treatment, but in terms of economic and technical aspects, large-scale treatment facilities It is difficult to install and operate, and in some cases, a large amount of by-products such as surplus sludge occurs. On the other hand, biological treatment method is more advantageous than physicochemical method in terms of treatment efficiency compared to cost, and is used in most domestic and foreign wastewater treatment facilities as a main treatment process for treating large-scale wastewater.

In the biological treatment method, various kinds of water pollutants, including organic substances introduced with influent wastewater, are basically decomposed or adsorbed / removed through aspiration and growth by aerobic microorganisms as nutrients, dissolved in an aerobic tank. Dissolved oxygen (DO) is the most basic growth condition for aerobic microorganisms along with substrates in influent sewage, and generally dissolved oxygen concentrations of DO 1.5 to 3.0 mg / L are required for aerobic microorganisms. Therefore, air injection through an air diffuser may be referred to as a method of stirring the activated microorganisms while delivering oxygen to the generalized aerobic microorganisms. However, if the concentration of suspended solids (MLSS) including active microorganisms in the aerobic tank must be kept high or high from the beginning, or during the summer when the water temperature rises, DO 1.5 to 3.0 mg, even if a large amount of energy for air injection is required. It is not easy to maintain a dissolved oxygen concentration of about / L. In particular, MLSS sewage water with a high suspended solids (MLSS) concentration of 10,000 mg / L or more has high viscosity and does not dissolve oxygen well in water, and even if the target dissolved oxygen concentration is reached, In many cases, dissolved oxygen is consumed in a short time, and thus, only maintaining the dissolved oxygen concentration of 1.0 mg / L or more can be regarded as an excellent aerobic tank for aerobic microorganisms in organic decomposition and nitrification mechanisms.

Using a fine bubble diffuser with high standard oxygen transfer efficiency (SOTE) to dissolve oxygen from DO 1.5 to 3.0 mg / L in an aerobic tank can achieve the target dissolved oxygen concentration with less power. However, since the bubbles generated from the acid pipes are fine bubbles with low potential, the stirring effect of the activated sludge is insignificant. On the contrary, the use of an acid pipe generating coarse bubbles produces a stirring effect of the activated sludge. Although it is superior, the oxygen transfer efficiency is low and the required power is high. Therefore, an effective air injection method for high concentration sewage wastewater, which not only has an oxygen transfer efficiency but also an agitation effect of activated sludge, should be devised.

For example, in Korean Patent Registration 10-0913728, in order to maintain the dissolved oxygen concentration in the aerobic tank sufficiently and stably, pure oxygen is selected as the oxygen source and not oxygen injection, and pure oxygen is injected into the wastewater. Likewise, when oxygen is injected into the sewage water instead of air, the oxygen transfer efficiency can be as high as oxygen, but since it is impossible to supply pure oxygen in the form of cylinder, it is necessary to obtain a pure oxygen generator that is expensive and has a complicated internal structure. Is inevitable. Therefore, it is not suitable for large processing facilities.

On the other hand, Korean Patent No. 10-1036225 is used in a biological wastewater treatment apparatus for treating a high concentration of organic wastewater, and a jet loop biological including a two-phase nozzle that can increase the dissolved oxygen in the reactor to improve the treatment efficiency. Regarding the wastewater treatment device, the two-phase nozzle for biological wastewater treatment device sprays the incoming wastewater into the jet loop reactor in a short time to complete mixing, and naturally inhales the air using the negative pressure generated during the injection, It is an invention that can improve the volumetric load by increasing the amount of dissolved oxygen in the wastewater by increasing the amount of dissolved oxygen in the wastewater by making microbubbles and recycling, and also by simply remodeling the existing wastewater treatment plant. However, it is theoretically insufficient to generate an ultra-micron bubble having excellent oxygen transfer efficiency.

Republic of Korea Patent No. 10-0784933 relates to a high concentration organic wastewater organic matter and nitrogen treatment device, in particular through a second treatment device equipped with two sets of anoxic tank and nitrification tank in series, compared to other biological nitrogen removal process (BNR) It is an invention that can increase the nitrogen (N) and phosphorus (P) removal efficiency, and increase the organic carbon oxidation ability through a long residence time.

In addition, in the nitrogen removal of livestock wastewater containing a high concentration of nitrogen (N) component, Korean Patent No. 10-0424068, a concentrated sedimentation tank for storing / concentrating suspended solids in the livestock wastewater and surplus sludge discharged from each biological process ; Degassing tank for increasing the pH of the treated water of the concentrated sedimentation tank to discharge the ammonia component in the form of gas; An anaerobic bioreactor installed at the rear of the degassing tank for lowering the high concentration of organic matter in the anaerobic state; Biodeodorization tank for removing odor by changing ammonia nitrogen to nitrate nitrogen; A denitrification tank for removing nitrogen components in the nitrification wastewater of the biological deodorization tank; Activated sludge and contact oxidation tanks for removing organic substances using aerobic microorganisms; And a filter tank in which contact medium is installed and a filter tank for removing the suspended substances in the discharged water to discharge the final treated water. The present invention relates to a livestock wastewater treatment apparatus for a high concentration; Biodeodorization tank; Denitrification tank; And nitrogen component and organic matter in the livestock wastewater from the activated sludge tank.

In addition, the Republic of Korea Patent Registration 10-1003162 relates to a livestock wastewater treatment apparatus that can increase the activity of microorganisms after oxidizing a highly toxic substance such as antibiotics contained in the livestock wastewater by mixing ozone in a supercritical state, In treating livestock waste water, there is a disadvantage that it is necessary to use ozone which is harmful and expensive to workers.

Therefore, in terms of economic and technical aspects, it should be easy to install and operate large-scale treatment facilities, have low risk of operation, low initial facility cost and power cost, and ultra-sized air bubbles. -Effective suspended solids (MLSS) above 1.0 mg / L in suspended sewage water of more than 10,000 mg / L can be maximized by easily adjusting to fine bubbles, thereby maximizing the decomposition and denitrification efficiency of organic matter by microorganisms. In addition, a new method for treating high concentration sewage wastewater, which can be easily operated by non-specialists, who can easily denitrify the nitrified nitriding solution to effectively remove total nitrogen (TN) components should be sought.

Republic of Korea Patent Registration 10-0913728 (2009.08.18) Republic of Korea Patent Registration 10-1036225 (2011.05.16) Republic of Korea Patent Registration 10-0784933 (2007.12.05) Republic of Korea Patent Registration 10-0424068 (2004.03.10) Republic of Korea Patent Registration 10-1003162 (2010.12.15)

In order to solve the above problems of the prior art, the present invention, in the treatment process of high concentration sewage of suspended suspension (MLSS) 10,000 mg / L or more, ultra-fine bubble and dissolved oxygen tank (dissolved oxygen tank) By maximizing the dissolved oxygen concentration using, to provide a high concentration sewage treatment method for improving organic decomposition and nitrification efficiency by microorganisms.

In addition, the present invention not only provides a denitrification circulation tank capable of effectively denitrifying the nitrified nitriding liquid to effectively remove the total nitrogen (TN) component, but also the size of the bubbles generated during operation from nanometer (nm) to micron meter. Easily controlled with an ultra-fine bubble of (μm) to maintain dissolved oxygen concentrations of 1.0 mg / L or more, even in high concentrations of wastewater with suspended solids (MLSS) of 10,000 mg / L or more. An object of the present invention is to provide an ultra-fine foam generator for pressure dissolving and normal pressure operation, which can maximize decomposition and nitrification efficiency.

In order to solve the above problems, the present invention, the lower side of the aerobic tank 100 is provided with a blower 95 and the diffuser 96, by aeration of the coarse bubbles 97, while delivering oxygen to the aerobic microorganism, Prevent sludge from being deposited on the bottom of the aeration tank 100; Inside the exhalation tank 100, a plurality of dissolved oxygen tank 110 is configured, the upper side is sealed and the lower side is open, ultra-fine foam (34) generated from the pressure-dissolved to atmospheric pressure ultra-fine foam generators 34 ) Is dispersed in the water of the dissolved oxygen tank 110 by using a plurality of dispersing devices 70 formed by including a collision slope plate 49, a jet stream forming tree 56, and a jet port 57, Increase the dissolved oxygen concentration of (110); The denitrification circulation tank 120 is configured to be connected to the exhalation tank 100 so that the nitrified liquid nitrified in the aerobic tank 100 and the dissolved oxygen tank 110 is provided with a nitride liquid transfer path provided under the separation wall 13 ( 98 is naturally transported to the denitrification circulation tank 120 through; The nitriding liquid transferred to the denitrification circulation tank 120 is subjected to denitrification and gravity precipitation under anoxic conditions inside the denitrification circulation tank 120, whereby nitrogen components and water pollutants are removed, the aerobic tank 100. ; Dissolved oxygen bath 110; Denitrification circulation tank 120; And a pressure-dissolving method (10) to an atmospheric pressure method (50) ultra-miniature bubble generator, characterized in that the suspension suspended solids (MLSS) provides a method for treating high concentration sewage water of 10,000 mg / L or more.

The treatment method of high concentration sewage wastewater according to the present invention can obtain the following effects.

(a) The ultra-micro count cloth 34 and the dissolved oxygen tank 110 according to the present invention can maintain the dissolved oxygen concentration at 1.0 mg / L or more even in high concentration sewage water of 10,000 mg / L or more suspended suspension (MLSS). have

(b) By maximizing the dissolved oxygen concentration by using the ultra-fine foam gun 34 and the dissolved oxygen tank 110 according to the present invention, it is possible to improve the organic decomposition and nitrification efficiency by the microorganisms.

(c) The dissolved oxygen tank 110 according to the present invention formed in the form of a downward conducting wall can maximize the oxygen transfer efficiency by lengthening the residence time of the ultra-fine fabric gun 34.

(d) The denitrification circulation tank 120 according to the present invention may improve the total total nitrogen (T-N) removal efficiency by naturally providing denitrification reaction conditions to the anaerobic anaerobic denitrification microorganisms.

(e) Denitrification circulating tank 120 according to the present invention by providing a clear supernatant water to the pressurized dissolved method (10) to atmospheric pressure method (50) ultra-micron bubble generator, circulating water, ultra-miniature bubble generator (10, 50) And defects in the dispersion apparatus 40 can be prevented.

(f) The pressure-dissolving method (10) and the atmospheric pressure method (50) ultra-micro-foam generation device according to the present invention, the size of the bubbles generated even during operation, in order to meet the characteristics of the target wastewater, nanometer (nm) to micrometer Easily adjustable with ultra-fine bubbles of (μm)

(g) Since the atmospheric pressure ultra-miniature gun generator 50 according to the present invention is a simplified device that is operated at atmospheric pressure, not only ordinary people who do not have specialized knowledge can easily operate, but also reduce power consumption and maintenance costs. Can

(h) After the pressure-dissolving method (10) to the atmospheric pressure method (50) ultra-miniature bubble generator according to the present invention, by constructing in conjunction with one or more vacuum ferromagnetic pump (33), even in a long pipe of 10m or more in the pipe It can prevent the coalescence of ultra-miniature guns in

In addition to the above effects, the ultra-micro-intensity bubble 34 and the dissolved oxygen tank 110 according to the present invention, as well as microbial reactor, polyphase fluidized bed, bubble column, extraction process, mechanical parts cleaner, farm, aquarium, It can be widely used for public baths.

1 is a front configuration diagram of a high concentration sewage wastewater treatment method using a pressure-dissolving method ultra-small cell generating device and a dissolved oxygen tank according to the present invention,
2 is a plan view of AA of FIG.
Figures 3a, 3b and 3c is a front sectional view, a plan view, and a AA planar sectional view of a dispersion apparatus according to the present invention,
Figure 4 is a front configuration diagram of a high concentration sewage wastewater treatment method using an atmospheric pressure ultra-micron bubble generator and a dissolved oxygen tank according to the present invention,
5 is a front view of the submerged pump according to the present invention,
Figure 6 is a brief embodiment of the atmospheric pressure ultra-miniature cloth generator of Figure 4,
FIG. 7 is a diagram illustrating the generation of ultra-miniature cloth of FIG. 6.
<Description of the code | symbol about the principal part of drawing>
10: pressure dissolving ultra-micropore generator 11: structure
12 partition wall 13 partition wall
14 pressure pump 15 air compressor (compressor)
16 pressurized mixing tank 17 liquid intake
18: liquid piping 19: air filter
21: regulator 22: gas flowmeter
23: electric valve 24: gas piping
25: gas distributor 26: pressure sensor
29: Piping of gas / liquid vitality mixture 31: Emergency shutoff means
32: distribution pipe 33: vacuum ferromagnetic pump
34: ultra-mini century gun 40: diffuser
41: dispersion top plate 42: tightening / loosening groove
43: upper plate curved surface 44: bolt fastening fixing means
45: dispersed lower plate 46: lower plate curved surface
47: support rod 48: main pipe connecting means
49: collision slant plate 50: atmospheric pressure ultra-miniature gun generator
51: air pump 55: nut type fastening fixing means
56: jet stream forming tree 57: jet
60: submerged pump 61: drive part
62: cutter type impeller 63: suction part
64: RPM inverter 65: intake air
95 blower 96 diffuser
97: coarse bubble 98: nitriding liquid transfer path
99: surplus sludge drawing means 100: aerobic tank
110: dissolved oxygen tank 120: denitrification circulation tank

Hereinafter, with reference to the accompanying drawings, in the treatment process of high concentration sewage of suspended solids (MLSS) 10,000 mg / L or more, dissolved oxygen using an ultra-fine bubble and dissolved oxygen tank (dissolved oxygen tank) By maximizing the concentration, it will be described in detail the high concentration sewage treatment method to improve the organic decomposition and nitrification efficiency by the microorganisms as follows.

1 is a front configuration diagram of a high concentration sewage wastewater treatment method using a pressure-dissolving method ultra-fine foam generator 10 and a dissolved oxygen tank 110 according to the present invention; 2 is a plan view A-A of FIG. 1, the present invention is largely, an aerobic tank 100 in which organic decomposition and nitrification reactions by aerobic microorganisms are performed; A plurality of dissolved oxygen tanks 110 formed inside the aerobic tank 100 to increase the dissolved oxygen concentration by the ultra-fine cloth 34; A denitrification circulating tank 120 in which a gravity settling process of suspended solids (SS) occurs while denitrification is carried out by natural transfer of the nitrified nitride solution from the aerobic tank (100); And a pressure-dissolving method ultra-fine foam generating device 10 for generating the ultra-fine foam 34 by forcibly sucking the clear supernatant of the denitrification circulation tank 120 into the circulating water.

In the treatment of high concentration sewage of suspended solids (MLSS) 10,000 mg / L or more of Figure 1, first, the high concentration of sewage is introduced into an aerobic tank 100 in which aerobic microorganisms including nitrification microorganisms are present. Raw water is 5000-20,000 mg / L of BOD for biological oxygen demand, 1,000-4,000 mg / L of ammonia nitrogen (NH ₃ -N) in total nitrogen (TN), 10,000 suspended solids (MLSS) concentration As high as -40,000 mg / L, the viscosity is so high that it is a very difficult wastewater to treat, even if large amounts of air are blown into the wastewater while consuming high energy. For this reason, it is not easy to meet the optimum dissolved oxygen (DO) of 1.5 to 3.0 mg / L in the aerobic tank. Fortunately, the livestock wastewater is close to organic wastewater, so if the dissolved oxygen concentration is maintained at 1.0 mg / L or more in an appropriate manner while nitrifying ammonia nitrogen (NH ₃ -N), it is biodegradable by aerobic microorganisms. Organics tend to decompose well. Therefore, in the high concentration of wastewater, in order to maintain the dissolved oxygen concentration at 1.0 mg / L or more, a special method must be taken, rather than the air diffuser method of 20% (fresh water standard) or less. .

In the present invention of Figure 1, first, the suspended solids (MLSS) flowing into the aerobic tank (100), the high concentration sewage waste water of 10,000 mg / L or more, the blower (95, blower) provided on the lower side of the aerobic tank (100); And it is aerated by the coarse bubble (97, coarse bubble) generated from the diffuser 96 receives a portion of oxygen. At this time, the coarse bubble 97 generated from the diffuser 96 serves to prevent activated sludge in the influent wastewater from being deposited on the lower portion of the aeration tank 100.

In addition, inside the exhalation tank 100, a plurality of dissolved oxygen tank 110 is configured, the upper side is closed and the lower side is open, the ultra-fine foam generated from the pressure-dissolving method ultra-fine foam generator 10 By dispersing the 34 in the water of the dissolved oxygen tank 110 using a plurality of dispersing apparatuses 70 including the impingement inclination plate 49, the jet stream forming tree 56, and the jet port 57, Increasing the dissolved oxygen concentration of the dissolved oxygen bath 110; The denitrification circulation tank 120 is configured to be connected to the exhalation tank 100 so that the nitrified liquid nitrified in the aerobic tank 100 and the dissolved oxygen tank 110 is provided with a nitride liquid transfer path provided under the separation wall 13 ( 98 is naturally transported to the denitrification circulation tank 120 through; Nitride liquid transferred to the denitrification circulation tank 120 is subjected to denitrification and gravity sedimentation under anoxic conditions inside the denitrification circulation tank 120, whereby nitrogen component and water pollution are carried out. Substances are removed; The clear supernatant of the denitrification circulation tank 120 is sucked and pressurized by the pressure dissolving type ultra-fine foam generator 10 composed of a pressure pump 14, an air compressor 15, and a pressure mixing tank 16. Converted to a gas / liquid vital mixture; After the converted gas / liquid vitality mixture reaches the dispersing apparatus 70 through the pipe 29 of the gas / liquid vitality mixture, the gas / liquid vitality mixture is once again split by the ultra-fine foam 34 in the dispersing apparatus 70. By dispersing in the water of the dissolved oxygen tank 110, to increase the dissolved oxygen concentration inside the dissolved oxygen tank 110; And the gas / liquid vitality mixture inside the dissolved oxygen tank 110 having the increased dissolved oxygen concentration flowing through the opening provided in the lower portion of the dissolved oxygen tank 110 and mixing with the liquid of the aerobic tank 100. ) The total dissolved oxygen concentration is significantly improved than in the conventional air diffuser method.

The plurality of dissolved oxygen tanks 110 configured inside the aerobic tank 100 have openings formed at the lower side thereof; And because it is formed in a downward flow in the form of a baffle wall, the residence time of the ultra-fine cloth (34) dispersed inside the dissolved oxygen tank 110 is long, the oxygen transfer efficiency into the ultra-micro-bubble-wastewater Is maximized naturally. Oxygen transfer efficiency maximized from the ultra-micron bubble and dissolved oxygen tank 110 improves the organic decomposition rate of aerobic microorganisms, and the nitrification efficiency of nitrifying microorganisms.

The nitrified nitrified liquid is transferred to an anoxic denitrification circulation tank 120 through a nitriding liquid conveying flow path 98 provided at the lower part of the separating wall 13, and then a denitrification reaction proceeds to the nitric acid nitrogen (NO ₃ -N). ) Is converted to nitrogen gas and the nitrogenous water pollutants are finally removed; The excess sludge sedimented by gravity in the lower part of the denitrification circulation tank 120 is drawn out of the system by the excess sludge drawing means 99 and processed; The clear supernatant of the denitrification circulation tank 120 is sucked into the pressure-dissolving ultra-fine foam generator 10 and is converted into a gas / liquid vitality mixture, while the dissolved oxygen tank 110-the aerobic tank 100-the denitrification circulation tank. (120)-serves as a circulating water to circulate the pressure-dissolving method ultra-miniature bubble generator (10).

The conventional pressure-dissolving method ultra-fine foam generating device 10 configured on the upper side of FIG. And high pressure piping. More specifically, the pressurized mixing tank 16 holding the liquid sucked through the liquid suction unit 17 (usually called the circulating water with suction of clear treated water) is maintained at a pressure of 3 to 7 kg _f / cm ² . Pressurized pump 14 is connected to the liquid pipe 18, which is pressed into the pressure; The air filter 19, the pressure regulator 21, the gas flow meter 22, the electric valve 23, and the gas pipe (2) which pressurizes and pushes air into the gas distributor 25 in the pressure mixing tank 16 24 is connected to the air compressor (15); A pressure sensor 26 is provided, which mixes the injected liquid and gas at an operating pressure of 3 to 7 kg _f / cm ² and raises the solubility of the injected gas under the high pressure by the applied pressure. Pressurized mixing tank 16; And dissolving the gas dissolved in the supersaturated state in the pressurized mixing tank 16 to a normal pressure state at a moment to induce the generation of the ultra-fine foam 34 according to the pressure change, while dissolving the oxygen tank ( 110 is composed of a piping 29 of a gas / liquid vitality mixture, and a diffuser 40 associated with a distribution tube 32 to disperse the ultra-miniature gun 34 in water, the pressure mixing tank ( 16) is provided with a pressure regulator 27 for the gas / liquid vitality mixture to maintain a constant pressure, and an electric valve 28, and an emergency shut-off means 31 that can block the high pressure state in case of emergency It is preferable to be.

3A, 3B, and 3C are a front sectional view, a plan view, and an AA planar sectional view of the dispersion apparatus 40 according to the present invention, wherein the dispersion apparatus 40 is a gas / liquid in FIGS. 1 and 4. While pulverizing the vitality mixture once again to the ultra-microporous cloth serves to disperse the ultra-microporous fabric 34 into the water of the dissolved oxygen tank 110, the target tank. Dispersion apparatus 40 according to the present invention of Figure 3, the upper side is tightening / loosening grooves 42 are formed, the lower side of the upper plate bending surface 43 and the fastening fixing means 44, the dispersion top plate 41 is formed in linkage ; Dispersion lower plate 45 in which the lower plate curved surface 46, the support bar 47, and the main pipe connecting means 48 is formed in linkage with the lower side; And a plurality of collision inclined plates 49 formed inside the support bar 47 and having a nut-type fastening fixing means 55 linked thereto.

The gas / liquid vitality mixture, which is generated from the pressure-dissolving ultra-low intensity bubble generating device 10 of FIG. 1 and is transported by the discharge pressure, includes a plurality of collision tilt plates 49 formed inside the dispersion device 40. The turbulence intensity is extremely increased and the turbulence intensity is severely increased and then split into ultra-fine strength guns, and the flow rate of the gas / liquid vitality mixture in the jet stream forming tree 56 formed from the upper plate curved surface 43 and the lower plate curved surface 46 is jetted. The gas / liquid vitality mixture of the high velocity and high velocity flows into the jet port 57 formed from the gap d _o of the dispersion top plate 41 and the dispersion bottom plate 45, and is a target oxygen tank 110. While colliding with the liquid of), it is once again split into the ultra-fine cloth 34 and is dispersed in the water of the dissolved oxygen tank 110. Here, by adjusting the space volume of the jet stream forming tree 56 and the gap (d _o ) of the jet port (57), it is possible to adjust the size and shape of the ultra-miniature foam (34) generated from the process, bolt type The fastening fixing means 44 and the nut-type fastening fixing means 55 are characterized in that the space volume of the jet stream forming tree 56 and the gap d _o of the jet port 57 can be easily adjusted. . In the present invention, in a practical embodiment of the jet port 57, a gap of 2 to 10 mm (d _o ) is preferable to generate an ultra-miniature bubble, the gap (d _o ) of the jet port is a conventional pressure dissolved air flotation It is much larger than the nozzle size of the dispersion nozzle used in (DAF), so that nozzle clogging due to foreign matter in the dispersion nozzle can be overcome.

However, the ultra-micro-foaming device 10 according to the pressure-dissolving method can generate the ultra-mini-foaming under high pressure operating conditions of 3 to 7 kg _f / cm ² , the use of a high-pressure facility is inevitable to use a high-pressure facility Driving hazard according to; Burden of high initial and power costs; Hassle and maintenance costs due to frequent replacement of high voltage parts due to high pressure operation; And the need for expertise in high pressure facilities.

Therefore, FIG. 4 according to the present invention is a front configuration diagram of the atmospheric pressure type ultra-miniaturized foam generating apparatus 50 operated at atmospheric pressure, which is designed to solve the problems according to the pressure-dissolving ultra-low intensity foam generating apparatus 10. to be. The ultra-fine force generator 50 for atmospheric pressure operation according to the present invention of FIG. 4 replaces the high-pressure pressurizing pump 14 in the pressure-dissolving method, and the submerged pump for atmospheric pressure of about 1 kg _f / cm ² ( 60); A low pressure air pump (51, air pump) in place of the high pressure air compressor (15) in the pressure dissolved method; A dispersing device (70, diffuser) of the gas / liquid vitality mixture in place of the dispersing nozzle formed of the fine nozzle in the pressure dissolved flotation method; And a normal pressure pipe replacing the high pressure pipe in the pressure dissolved method.

More specifically, the air flow pump 51 is connected to the gas flow meter 22, the electric valve 23, and the gas piping 24, which injects a constant air into the suction portion 63 of the submerged pump 60 ); RPM inverter, which is formed of a drive unit 61, a cutter-type impeller 62, and a suction unit 63 to suck the air from the air pump 51 and the liquid in the water to generate a gas / liquid vitality mixture. 64), the submersible pump 60 to which the pressure sensor 26 and the piping 29 of the gas / liquid vitality mixture are linked; The gas / liquid vitality mixture from the submerged pump 60 is dispersed in water in the form of ultra-miniature bubbles of nanometer (nm) to millimeter (mm) size by adjusting the gap (d _o ) of the jet port (57). Dispersing device 40 is formed to include, impingement inclined plate 49, jet stream forming tree 56, and the jet port (57); And one or more vacuum ferromagnetic pumps 33 are additionally provided after the submerged pump 60 to prevent coalescing of ultra-miniature bubbles in the pipe even in a pipe of 10 m or more. According to the ultra-miniature gun generator 50 is configured.

5 is a front view of the submerged pump 60 according to the present invention.

Hereinafter, the operation function and method of the atmospheric pressure ultra-miniature foam generating device 50 according to the present invention will be described in detail with reference to FIGS. 4 and 5.

First, in sucking the liquid of the submerged pump 60, the air is naturally sucked from the outside by using the minus pressure applied to the suction unit 63, and the suctioned constant air flow rate is sucked into the cutter impeller ( 62, impeller) and violently collide with the sucked liquid to break it into fine bubbles to form a gas / liquid vitality mixture, and the gas / liquid vitality mixture produced from the above process is a gas / liquid vitality mixture The submerged pump 60 forcibly transferring the pipe 29 through the pipe 29 to the diffuser 40 is configured at the upper side of the denitrification circulation tank 120 in the water. The impeller (impeller) of the submerged pump 60 is preferably a cutter type that can finely grind the contaminants that may be present in the water, the rotational force of the cutter-type impeller 62 on one side of the submerged pump 60 By adjusting the, it is preferable to provide an RPM inverter (64, inverter) to adjust the intake amount of the gas, the intake amount of the liquid, the transfer amount of the gas / liquid vitality mixture and the size of the microbubble, the submerged pump 60 A low pressure air pump 51 to maintain a constant flow rate of air naturally sucked by the negative pressure formed in the suction unit 63; Gas flow meter 22; And an electric valve 23 operated in conjunction with the pressure sensor 26 is preferably provided on the gas pipe 24. In addition, if a defect such as clogging of foreign matter occurs after the submerged pump 60, the elevated pressure signal of the pressure sensor 26 is transmitted to the electric valve 23 provided in the gas pipe 24 is introduced Allows you to adjust the air flow rate.

In a general liquid pump, the inflow of air causes cavitation in the liquid pump to lose the suction power of the liquid. The submerged pump 60 according to the present invention of FIG. It is located in a positive pressure atmosphere and does not have a suction lift, so that no amount of air is introduced, so that the cavitation is not much higher than that of the ground pump. In the practical embodiment of the submerged pump 60 of the present invention, the liquid intake amount (volume unit) to the air intake amount (STP; volume unit in terms of standard temperature / standard pressure condition) is up to 4.0 vol%, and the intake amount of the liquid is somewhat It was found to be reduced but not significantly affected by cavitation. In addition, by adjusting the air flow rate flowing into the submerged pump (60) it was possible to adjust the size of the ultra-miniature cloth (34) generated finally, that is, in the amount of air inlet to 0.01 to 0.5 vol% Nano-scale ultra-fine bubbles, 0.5-1.5 vol%, micro-meter-sized fine bubbles, and air inflow (volume) compared to liquid intake At 1.5 to 4.0 vol%, coarse bubbles of millimeter size were generated. The size of the generated bubbles can be easily adjusted by adjusting the flow rate of the air flowing in during the operation of the submerged pump (60).

The gas / liquid vitality mixture produced from the above process is a diffuser (40, diffuser) located in the water of the dissolved oxygen tank (110), which is the target tank, through the piping (29) and the distribution tube (32) of the gas / liquid vitality mixture. After being conveyed by the discharge pressure of the submerged pump 60 to the ultra-high strength once again by the turbulence intensity and jet stream generated by the impact swash plate 49 and the jet stream forming tree 56 of the dispersion device 40 It is split into the cloth 34 and dispersed in the water of the dissolved oxygen bath 110. The dispersion device 40 according to the present invention is as described above in FIG.

In FIG. 4, in the long pipe of 10 m or more, one or more vacuum self-priming pumps 33, following the submerged pump 60, in order to prevent the coalescence of the ultra-miniature bubbles in the pipe. It is desirable to configure the pump in conjunction.

As described above, the size and distribution form of the ultra-fine force gun 34 generated from the atmospheric pressure ultra-miniature gun generator 50 according to the present invention, a) flows into the inlet portion 63 of the submerged pump 60 Control of the air flow rate; b) rotational force adjustment of the cutter-type impeller 62 of the submerged pump 60; And c) by adjusting the gap (d _o ) of the dispersing device 40, the blowing port 57, the driver can be easily adjusted to the size of the desired bubble.

FIG. 6 is a simplified embodiment of the atmospheric pressure ultra-small force gun generating device 50 according to the present invention, and FIG. 7 is a generating view of the ultra-fine force cloth 34 according to the embodiment of FIG. By adjusting the air flow rate flowing into the inlet portion 63 of the immersion pump 60 and the gap (d _o ) of the dispensing device 40, the outlet port 57, the millimeter (Fig. 7a), micron (Fig. 7b), and nano (Fig. 7c) It was possible to freely generate the ultra-miniature foam 34 of the size, the ultra-miniature foam 34 according to the present invention to reach the saturated dissolved oxygen concentration in a shorter operating time than in the conventional diffuser method Could. The submerged pump 60 used in the embodiment of FIGS. 6 and 7 is an 0.2 hp (HP) impeller pump and was carried out in an actual ecosystem of 500L.

As described above, the ultra-fine strength cloth (34) generated from the pressure-dissolving method (10) to the atmospheric pressure method (50) ultra-mini-foam generator according to the present invention; The dissolved oxygen tank 110 in which the ultra-fine strength foam 34 is dispersed and the dissolved oxygen concentration is extremely increased; And denitrification circulation tank 120, suspended solids (MLSS) 10,000 mg / L or more in high concentration sewage, by maximizing the dissolved oxygen concentration while reducing the energy required by air injection, organic matter decomposition by microorganisms and It is possible to provide a new method for treating high concentration sewage wastewater which greatly improves the total nitrogen (TN) removal efficiency.

Claims (4)

Suspension Flotation (MLSS) In treating high concentrations of sewage water above 10,000 mg / L,
A blower 95 at a lower side of the aerobic tank 100; And an diffuser 96 is provided to aeration the coarse bubbles 97 to prevent the deposition of activated sludge under the aerobic tank 100 while delivering oxygen to the aerobic microorganisms;
Inside the exhalation tank 100, a plurality of dissolved oxygen tank 110 is configured, the upper side is closed and the lower side is open, ultra-low intensity gun 34 generated from the pressure-dissolving type ultra-small cell generator 10 ), The collision slope plate 49; Jet stream forming trees 56; And by dispersing in the water of the dissolved oxygen tank 110 using a plurality of dispersing device 70 formed by including a jet port 57, to increase the dissolved oxygen concentration of the dissolved oxygen tank 110;
The denitrification circulation tank 120 is configured to be connected to the exhalation tank 100 so that the nitrified liquid nitrified in the aerobic tank 100 and the dissolved oxygen tank 110 is provided with a nitride liquid transfer path provided under the separation wall 13 ( 98 is naturally transported to the denitrification circulation tank 120 through;
The nitriding liquid transferred to the denitrification circulation tank 120 may include a denitrification reaction under anoxic conditions in the denitrification circulation tank 120; And by gravity precipitation, nitrogen components and water pollutants are removed;
The supernatant of the denitrification circulation tank 120 is a pressure pump 14; An air compressor 15; And suctioned and pressurized by the pressure-dissolving method ultra-small cell generator 10 composed of the pressure mixing tank 16, thereby converting it into a gas / liquid vitality mixture;
After the converted gas / liquid vitality mixture reaches the dispersing apparatus 70 through the pipe 29 of the gas / liquid vitality mixture, the gas / liquid vitality mixture is once again split by the ultra-fine foam 34 in the dispersing apparatus 70. By dispersing in the water of the dissolved oxygen tank 110, to increase the dissolved oxygen concentration inside the dissolved oxygen tank 110; And
The gas / liquid vitality mixture in the dissolved oxygen tank 110 having the increased dissolved oxygen concentration flows out through the opening provided under the dissolved oxygen tank 110 and is mixed with the liquid in the aerobic tank 100, thereby providing the aerobic tank 100. To increase the total dissolved oxygen concentration,
Aerobic tank 100; Dissolved oxygen bath 110; Denitrification circulation tank 120; And a pressure-dissolving method ultra-fine foam generator 10, characterized in that to remove water pollutants while maintaining the dissolved oxygen concentration of the aerobic tank 100 to 1.0 mg / L or more,
Suspended Float (MLSS) High-density sewage treatment above 10,000 mg / L. The method according to claim 1,
Subsequent to the pressure-dissolving method ultra-fine force generation device 10, the changed pressure signal of the pressure sensor 26 resulting from the defect generation is transmitted to the electric valve 23 provided on the gas pipe 24, the inflow Characterized in that it is configured to automatically adjust the flow rate of the air to be
Suspended Float (MLSS) High-density sewage treatment above 10,000 mg / L. Suspension Flotation (MLSS) In treating high concentrations of sewage water above 10,000 mg / L,
A blower 95 at a lower side of the aerobic tank 100; And an diffuser 96 is provided to aeration the coarse bubbles 97 to prevent the deposition of activated sludge under the aerobic tank 100 while delivering oxygen to the aerobic microorganisms;
Inside the exhalation tank 100, a plurality of dissolved oxygen tank 110 is configured, the upper side is closed and the lower side is opened, the ultra-micro-foam (34) generated from the atmospheric pressure ultra-fine foam generator 50 A crash slope plate 49; Jet stream forming trees 56; And by dispersing in the water of the dissolved oxygen tank 110 using a plurality of dispersing device 70 formed by including a jet port 57, to increase the dissolved oxygen concentration of the dissolved oxygen tank 110;
The denitrification circulation tank 120 is configured to be connected to the exhalation tank 100 so that the nitrified liquid nitrified in the aerobic tank 100 and the dissolved oxygen tank 110 is provided with a nitride liquid transfer path provided under the separation wall 13 ( 98 is naturally transported to the denitrification circulation tank 120 through;
The nitriding liquid transferred to the denitrification circulation tank 120 may include a denitrification reaction under anoxic conditions in the denitrification circulation tank 120; And by gravity precipitation, nitrogen components and water pollutants are removed;
The supernatant of the denitrification circulation tank 120 is a submerged pump 60; And the air introduced into the suction part 63 of the submerged pump 60 and the rotational force of the cutter-type impeller 62 while being sucked into the atmospheric pressure type ultra-fine foam generator 50 composed of the air pump 51. By mixing, it is converted into a gas / liquid vital mixture;
After the converted gas / liquid vitality mixture reaches the dispersing apparatus 70 through the pipe 29 of the gas / liquid vitality mixture, the gas / liquid vitality mixture is once again split by the ultra-fine foam 34 in the dispersing apparatus 70. By dispersing in the water of the dissolved oxygen tank 110, to increase the dissolved oxygen concentration inside the dissolved oxygen tank 110; And
The gas / liquid vitality mixture in the dissolved oxygen tank 110 having the increased dissolved oxygen concentration flows out through the opening provided under the dissolved oxygen tank 110 and is mixed with the liquid in the aerobic tank 100, thereby providing the aerobic tank 100. To increase the total dissolved oxygen concentration,
Aerobic tank 100; Dissolved oxygen bath 110; Denitrification circulation tank 120; And an atmospheric pressure ultra-fine foam generator (50), characterized in that to remove the water pollutants while maintaining the dissolved oxygen concentration of the aerobic tank 100 to 1.0 mg / L or more,
Suspended Float (MLSS) High-density sewage treatment above 10,000 mg / L. The method according to claim 3,
Even in a pipe of 10 m or more, in order to prevent the coalescence of the ultra-fine force bubbles in the pipe, one or more vacuum ferromagnetic suction pumps 33 may be formed after the atmospheric pressure type ultra-fine force generator 50. Characterized by
Suspended Float (MLSS) High-density sewage treatment above 10,000 mg / L.

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