KR20120138025A

KR20120138025A - Floatation apparatus

Info

Publication number: KR20120138025A
Application number: KR1020110057282A
Authority: KR
Inventors: 위성수; 김기준
Original assignee: 위성수
Priority date: 2011-06-14
Filing date: 2011-06-14
Publication date: 2012-12-24

Abstract

The present invention relates to a flotation separation device, by using a microbubble diffuser to supply microbubbles to the wastewater using a microbubble diffuser even if a separate pressurized tank, a pressure reducing valve, and an air injector, etc. The device can be scaled down, easy to operate and maintain, and the micro-bubble diffuser can be adjusted in a variety of ways to carry out floating separation processes of various operating methods, such as full pressurization, partial pressurization and circulation. Provides a floating separation device.

Description

Floatation Apparatus

The present invention relates to a flotation separation device. More specifically, even if a separate pressurized tank, a pressure reducing valve and an air injector are not installed, the microbubble diffuser is used to supply microbubbles, which are fine bubbles, to the wastewater, thereby simplifying the construction and reducing the overall size of the apparatus. It is easy to operate and maintain, and by variously adjusting the arrangement of the micro bubble diffuser, the flotation separation device capable of performing the flotation separation process of the various driving methods such as the full press method, the partial press method and the circulation method. It is about.

Despite the gradual strengthening of environmental standards, wastewater such as livestock waste, domestic sewage, industrial waste, and leachate is gradually increasing nationwide. For example, Korea's annual waste generation amount is known to reach about 20 million tons, and the wastewater generated from this is considerable, and it is known that 3000 tons of leachate flows out only from Gimpo landfill.

Industrial waste, food waste and agricultural, livestock, and fishery wastes that are poured out in large quantities every day are secondary to environmental pollution caused by waste and wastewater, that is, soil acidification (degradation of soil due to excessive concentration of salt) and odors. As a result, the treatment is an environmentally significant issue.

If the waste water is discharged without purification, eutrophication occurs due to various organic substances, microorganisms, toxic compounds, etc., which not only destroys aquatic ecosystems, but also directly or indirectly causes serious damage to humans. As a result, collective complaints are constantly being raised and become a social issue.

As a result, researches on how to treat sewage, such as wastewater, are constantly being developed and studied.

However, despite the variety of wastewater treatment methods, the typical wastewater treatment method combines a series of physical treatments with chemical and biological treatments to treat contaminants from the wastewater, and typically includes the following two stage treatment process.

The first stage treatment is also commonly referred to as pretreatment, which screens the relatively large contaminants contained in the waste water into a screen with holes of uniform size, and sedimentation separation which separates the contaminants heavier than water by gravity. sedimentation is applied to remove sedimentary contaminants in the wastewater.

In the second step, various chemicals such as flocculants, adsorbents and fungicides are used to agglomerate and precipitate suspended suspensions, adsorb or kill pathogens, and decompose non-settling biodegradable organic substances by the action of microorganisms. It uses biological unit processes such as converting to gas or flocculating flotation to settle and remove organic matter contained in the waste water.

In addition to the above treatments, a method of removing floating matter contained in the waste water by flotation separation is performed in parallel or selectively. Flotation separation is used to remove dissolved solids such as suspended solids and colloidal particles or to remove them. In separating the liquid particles to be discharged from the wastewater, fine bubbles are introduced into the wastewater to allow the bubbles to adhere to the float, thereby forming a float-bubble complex to increase buoyancy, thereby floating floating soils and colloidal floats floating from the wastewater. It is a method of removing by using a skimmer. According to the present invention, since particles having a lower density than the liquid can be quickly floated and particles having a higher density than the liquid can be obtained, they are widely used as wastewater treatment methods.

Conventional flotation separation method includes air flotation separation method that uses a rotary impeller or diffuser to directly blow air into the wastewater to generate bubbles. It is not known to be effective in removing suspended solids from waste water.

As another method of flotation separation, the pressure flotation separation method is widely used.

To produce fine agglomerates, chemicals such as neutralizers, flocculants and coagulant aids are added and then pressurized devices such as air compressors (pressure pumps) are used to dissolve the high-pressure air in the waste water. The pressurized wastewater is sent to a flotation tank to reduce the pressure to generate fine bubbles of about 5 to 50 microns and to operate on the principle of floating the colloidal particles or suspended matter by the bubbles thus generated.

However, the conventional pressure flotation device is a pressurization device (pressure pump), such as a compressor for dissolving high pressure air in the wastewater, a pressure tank for dissolving air in the wastewater, a pressure control valve for regulating the pressure in the pressure tank, air The device is inexpensive and huge because it requires an injection device (ejector or compressor), an air control valve that maintains a proper amount of air in the pressure tank, and thus has a large area occupied by the facility.

In addition, the operation and maintenance requires highly skilled technology and high operating costs, and the speed of floating floats takes more than a few tens of minutes. Had a problem.

The present invention is invented to solve the problems of the prior art, one side of the present invention is a micro bubble in the waste water by using a micro bubble diffuser even without installing a separate pressurized tank, pressure reducing valve and air injection device By supplying the microbubble, the configuration is simple and the size of the entire apparatus can be reduced, and the floating separation apparatus is easy to operate and maintain.

Another aspect of the present invention is to provide a flotation separation apparatus capable of performing the flotation separation treatment process of various driving methods, such as a full press method, a partial press method and a circulation method, by variously adjusting the arrangement of the micro bubble diffuser.

Such a floating separation device according to the present invention, a floating separation device for floating by separating the suspended matter contained in the waste water, the chemical reaction tank is formed so that the waste water flows and agglomerated the suspended matter in the waste water by the drug; A microbubble diffuser for supplying microbubbles to the wastewater passing through the chemical reaction tank; And a floating separation tank configured to allow the wastewater supplied with the microbubble through the microbubble diffuser to flow together with the microbubble, and to float and float the floating matter in the wastewater to the upper portion by the microbubble to separately remove and discharge the floating floating matter on the upper portion. do.

The microbubble diffuser may be configured to receive the wastewater that has passed through the chemical reaction tank to generate microbubbles in the wastewater, and the wastewater that has passed through the microbubble diffuser may be configured to flow into the flotation separator while containing microbubbles. have.

In addition, some of the wastewater is introduced into the chemical reaction tank and the rest is configured to flow into the microbubble diffuser, the microbubble diffuser is configured to receive a portion of the wastewater to generate microbubble in the wastewater, the microbubble diffuser The wastewater passed may be configured to flow into the wastewater supply line connected to the floating separation tank from the chemical reaction tank in the state containing the micro bubble.

The apparatus may further include a treatment tank configured to store the treated water in which the suspended matter is removed from the floating separation tank, and the micro bubble diffuser receives the treated water of the treated tank to generate micro bubbles in the treated water. The wastewater passing through the microbubble diffuser may be configured to flow into a wastewater supply line connected to the floating separation tank from the chemical reaction tank while containing the microbubble.

The micro bubble diffuser may include a housing having a wastewater inlet through which wastewater is introduced; A part is inserted into the housing and accommodated therein, an air inlet is formed at one end thereof, and an air outlet is formed at the other end thereof, and an air supply pipe having a conical protrusion formed around the air outlet; And a cover coupled to the housing, one end of which surrounds the protrusion, maintains a predetermined distance from the other end, and a primary air wastewater mixing chamber is formed. The air supply pipe is movably mounted in the housing, and the micro The bubble diffuser includes a cleaning device body forming an exterior, a cleaning device cover coupled to the cleaning device body to form a chamber, and a cleaning device cover having a communication tube through which waste water or a fluid is supplied to the chamber; It may further include a cleaning device having a drive bar operated by, and a diaphragm mounted to the drive bar for reciprocating the air supply pipe linearly.

According to the present invention, even if a separate pressurized tank, a pressure reducing valve, and an air injecting device are not installed, microbubbles, which are fine bubbles, are supplied to the wastewater using a microbubble diffuser, thereby simplifying the construction and reducing the size of the entire apparatus. Can easily perform operation and maintenance, and can improve the process treatment efficiency.

In addition, the present invention by variously adjusting the arrangement of the micro-bubble diffuser, it is possible to perform the floating separation treatment process of a variety of operating methods, such as a full pressure method, a partial pressure method and a circulation method.

1 to 3 is a block diagram illustrating a conceptual block diagram of the configuration of the flotation apparatus according to various embodiments of the present invention.
4 is a cross-sectional view schematically showing the internal structure of a micro bubble diffuser according to an embodiment of the present invention.
5 is a cross-sectional view showing the air wastewater mixing chamber of FIG. 4.
Figure 6a is a perspective view of the housing and the air supply pipe of Figure 4 coupled.
6B is a rear view of the air supply pipe of FIG. 4.
6C is a side view of the air supply pipe of FIG. 4.
7 is a cross-sectional view of the primary air wastewater mixing chamber of FIG. 4.
8 is a view showing a state in which the cleaning device is coupled to the microbubble diffuser of Figure 4 operating in the normal mode.
9 is a view showing a state in which the cleaning device is coupled to operate in the cleaning mode in the micro bubble diffuser of FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 to 3 is a block diagram illustrating a conceptual block diagram of the configuration of the flotation apparatus according to various embodiments of the present invention.

Floating separation apparatus according to an embodiment of the present invention by supplying microbubbles of fine bubbles to the waste water using the microbubble diffuser 100, such as a separate pressurized tank, a pressure reducing valve and an air injection device (compressor or injector) As a device capable of smoothly floating the suspended matter in the wastewater even without installing the device, the chemical reaction tank 200, the micro bubble diffuser 100 and the floating separation tank 300 is configured.

The chemical reaction tank 200 is usually formed to introduce the first pretreated wastewater, and is configured to agglomerate suspended solids using various chemicals such as a flocculant and an adsorbent. A separate chemical inlet and an agitator are provided for the chemicals and suspended solids. It is configured to be agitated and agglomerated, and a chemical reaction tank 200 widely used in a general flotation separation device may be used, and thus a detailed description thereof will be omitted.

The micro bubble diffuser 100 is configured to supply micro bubbles, that is, micro bubbles, to the wastewater that has passed through the chemical reaction tank 200, and the micro bubble diffuser 100 is configured to supply micro bubbles into the chemical reaction tank 200. It may be disposed in communication with the reactor 200 or in communication with the wastewater supply line 400 to supply micro bubbles on the wastewater supply line 400 connecting the chemical reaction tank 200 and the flotation separation tank (300). have.

The micro bubble diffuser 100 is configured to directly enter the wastewater according to the flotation separation treatment method of the present invention, or is configured to enter the wastewater passed through the chemical reaction tank 200 or the treatment passed through the flotation separation tank 300 The water may be configured to be introduced, and the waste water or the treated water may be stirred with air after being introduced to generate micro bubbles, which will be described later.

The floating separation tank 300 is formed such that the wastewater that has passed through the chemical reaction tank 200 is supplied with the microbubbles through the microbubble diffuser 100, and the suspended matter in the wastewater is introduced by the microbubble in the inner space. Floating to the upper portion, floating floating on the upper portion is configured to be separated and removed by a separate skimmer (skimmer) to discharge. Since the flotation separation tank 300 may also be used, a general separation flotation tank 300 which is widely used in a general flotation separation apparatus, a detailed description thereof will be omitted.

According to such a structure, in the flotation separator according to an embodiment of the present invention, the waste water first flows into the chemical reaction tank 200, and then stirred by the injected chemical and the stirrer to aggregate the suspended matter. The waste water in the state of flocculation in this way is moved from the chemical reaction tank 200 to the floating separation tank 300, in which the waste water is introduced into the microbubble diffuser 100 before the waste water flows into the floating separation tank 300. By the microbubble is supplied to the wastewater, and therefore, the wastewater in which the microbubbles are mixed flows into the floating separation tank 300.

As such, when the wastewater in which the microbubbles are mixed flows into the floating separation tank 300, the floating separation tank 300 adheres to the floating matter in the wastewater to reduce the specific gravity of the floating particles, thereby floating the floating material. It rises to the top of the separation tank (300). In this way, the float floated to the upper portion of the floating separation tank 300 is separated and removed through the skimmer and discharged through a separate outlet, and thus only the treated water remains in the floating separation tank 300 in a state where the floating material is removed. The waste water is purified in a manner.

The treatment method of the flotation device may be performed in a more specific manner such as a full pressure method, a partial press method, and a circulation method. First, the flotation device according to an embodiment of the present invention may include a chemical reaction tank 200. All of the wastewater passing through the microbubble diffuser 100 may be configured to be performed in a pre-pressure manner.

That is, as shown in Figure 1, the micro bubble diffuser 100 is installed in communication with the discharge port of the chemical reaction tank 200 so that all the waste water that passed through the chemical reaction tank 200, and stirred the introduced waste water with air It can be configured to generate micro bubbles in the waste water. Thereafter, the outlet of the microbubble diffuser 100 is in communication with the flotation separator 300 so that the wastewater containing the microbubble flows through the microbubble diffuser 100 from the microbubble diffuser 100 to the flotation separator 300. Is placed.

In other words, the microbubble diffuser 100 is installed on the wastewater supply line 400 connecting the chemical reaction tank 200 and the floating separation tank 300, so that the wastewater floats from the chemical reaction tank 200. In the process of moving to pass through the micro bubble diffuser 100 is configured to generate micro bubbles.

Meanwhile, as shown in FIG. 2, the partial pre-treatment may be performed in such a manner that some of the first pretreated wastewater flows into the chemical reaction tank 200 and the other flows into the micro bubble diffuser 100.

That is, the microbubble diffuser 100 directly receives a portion of the wastewater and stirs it with air to generate microbubbles in the wastewater, and then the wastewater passing through the microbubble diffuser 100 contains a microbubble in a chemical reaction tank ( It is configured to flow into the wastewater supply line 400 is connected to the floating separation tank 300 from 200.

In other words, the microbubble diffuser 100 is installed such that some of the wastewater passes directly through the microbubble diffuser 100, and is configured to generate microbubbles in some of the wastewater, and passes through the microbubble diffuser 100. The waste water is mixed with the wastewater moving from the chemical reaction tank 200 to the flotation separation tank 300 in the state containing the micro bubble and flows together into the flotation separation tank 300.

This partial pressurization method has a smaller microbubble content in the wastewater than the above-mentioned pressurization method, so that the flotation separation process can be performed more quickly, so that the user can select an appropriate method according to the condition of the wastewater. There will be.

On the other hand, the floating separation apparatus according to an embodiment of the present invention further includes a separate treatment tank 500 that can store the treated water in a state in which the floating matter is removed and discharged from the floating separation tank 300 as shown in FIG. 3. It may be configured to include, the micro bubble diffuser 100 is supplied with the treated water of the treatment tank 500 to generate micro bubbles in the treated water, it is introduced into the floating separation tank 300 from the chemical reaction tank 200 The circulation system may be configured to be performed in a manner of supplying waste water to be discharged.

That is, the microbubble diffuser 100 is configured to receive the treated water from the treated water tank 500 to generate microbubbles in the treated water, and the wastewater that has passed through the microbubble diffuser 100 contains the microbubbles in the state of chemicals. It may be configured to flow into the waste water supply line 400 is connected to the floating separation tank 300 from the reaction tank 200.

Since this method also generates microbubbles using treated water, it is possible to generate microbubbles more quickly, thereby allowing a relatively smooth floating separation treatment process.

Next, the configuration of the micro bubble diffuser according to an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 9.

4 is a cross-sectional view of a micro bubble diffuser applied to the micro bubble reactor of the present invention. A description with reference to FIG. 4 is as follows.

The microbubble diffuser according to the present invention includes a housing 10 having a wastewater inlet 12 through which wastewater is introduced, an air supply pipe 20 into which a portion of the housing 10 is inserted and accommodated, and a housing formed at one end of the supply pipe. The cover 40 of the primary air wastewater mixing chamber 60 is included.

The housing 10 is generally formed in a hollow cylindrical shape, the waste water inlet 12 may be formed on one side thereof. In the housing 10, a wastewater chamber 14 through which wastewater introduced through the wastewater inlet 12 may pass may be formed.

The air supply pipe 20 has an air inlet 22 through which air is introduced at one end, and an air outlet 24 is formed at the other end thereof, and a conical protrusion 30 is formed around the air outlet 24. The air inlet 22 and the air outlet 24 are in communication with each other in the air supply pipe (20).

A step 34 is formed in the air supply pipe 20, and the diaphragm 16 mounted on the housing 10 may be fixed to the step 34. At this time, the air supply pipe 20 is preferably mounted to the housing 10 to be movable. Since the diaphragm 16 is easily deformed and has a property to return to its original shape after being deformed, the diaphragm 16 may guide the movement of the air supply pipe 20.

The cover 40 is integrally coupled to the housing 10, one end of the cover 40 has a wastewater inlet 52 having a relatively large cross-sectional area, and the other end of the cover 40 has a relatively small cross-sectional area. The protrusion 30 and the primary air wastewater mixing chamber 60 are formed, and the other end is provided with a secondary air wastewater mixing chamber 61.

Where the cover 40 covering the primary air wastewater mixing chamber 60 is in contact with the protrusion 30 has a relatively narrow cross-sectional area, similar to the outer formation of the protrusion 30, the secondary air The wastewater mixing chamber 61 preferably has a relatively large cross-sectional area to form a space in which air and wastewater can be mixed.

On the other hand, a plurality of partitions 32 are formed on the outside of the protruding portion 30 and the passage 50 through which the wastewater introduced through the wastewater inlet 12 is moved to the air wastewater mixing chamber is provided. In particular, as the passage 50 approaches the air wastewater mixing chamber 60, the cross-sectional area decreases, and the wastewater accelerates as the passage 50 passes. This is because the velocity of the fluid is increased by Bernoulli's theorem when the cross-sectional area of the passage through which the fluid flows is reduced even at the same flow rate.

That is, the passage 50 has a smaller cross-sectional area toward the outlet 54 than the inlet 52, so that the flow rate of the wastewater may be changed.

5 is a cross-sectional view of the cover and the air supply pipe is coupled. A description with reference to FIG. 5 is as follows.

A passage 50 is formed by the cover 40 and the protrusion 30, and the passage 50 is divided into a plurality of partitions 32 by the plurality of partitions 32. That is, the wastewater introduced into the wastewater chamber 14 may be divided into a plurality of flow paths and moved to the primary air wastewater mixing chamber 60.

The protrusion 30 and the air outlet 24 maintain the acceleration and rotational force of the waste water and form a vacuum pressure in the air outlet 24 to improve the air waste water mixing efficiency and the other end of the cover 40 at a predetermined interval. It is formed while maintaining.

Figure 6a is a perspective view of the housing and the air supply pipe coupled state, Figure 6b is a rear view of the protrusion, Figure 6c is a side view of the air supply pipe. A description with reference to FIGS. 6A, 6B, and 6C is as follows.

The partition wall 32 is inclined at an angle of 5 ° to 75 ° with respect to the vertical plane and at an angle of 2 ° to 45 ° with respect to the horizontal plane, so that the passage 50 gradually decreases in cross-section along the partition wall 32. The speed of the flowing wastewater is increased and rotational force is generated.

7 is a cross-sectional view of the primary air mixing chamber. This will be described below with reference to FIG.

The air outlet 24 formed integrally with the air supply pipe 20 and the protrusion 30 which is a waste water passage through which the air is discharged and the waste water are discharged are formed inside the cover 40, respectively. L42 is to be changed by the angle (Fig. 3b, 3c) with respect to the horizontal plane and the vertical plane of the protrusion (30). It is preferable to maintain the length of 0.5-3 times the diameter of the protrusion end (d52).

Hereinafter, the operation of the micro bubble diffuser will be described.

Waste water pumped by a pump (not shown) flows into the wastewater chamber 14 at a constant pressure state through the wastewater inlet 12. Wastewater collected in the wastewater chamber 14 flows into the inlet 52, passes through the passage 50, and is discharged to the outlet 54.

Wastewater passing through the passage 50 flows along a plurality of flow paths divided by the partition wall 32, and an acceleration force and a rotation force are generated according to a form inclined in the vertical direction or the horizontal direction of the partition wall 32. .

In particular, since the wastewater passing through the partition 32 moves at a high speed at the outlet 54 adjacent to the air outlet 24, the air pressure is lowered near the air outlet 24. In particular, since the acceleration rapidly increases while the wastewater passes through the passage 50 and a high-speed rotational force is generated, a vacuum pressure may be generated in the air outlet 24. On the other hand, the air inlet 22 is a constant pressure bar air is moved from the air inlet 22 to the air outlet (24).

That is, air is introduced into the air inlet 22 and discharged to the air outlet 24.

Air and wastewater are mixed in the primary air wastewater mixing chamber 60, and the microbubbles are formed while stirring and colliding the waste and the air, which maintain the rotational and acceleration forces on a narrow passage of the cover 40, and the cover again ( In the secondary air wastewater mixing chamber 61 located at the end of the 40) by impingement agitation, even finer microbubbles are formed.

8 is a view showing a state in which the cleaning device is coupled to operate in the normal mode. A description with reference to FIG. 8 is as follows.

The microbubble diffuser according to the present invention may further include a cleaning device having a cleaning device body 70 forming an appearance and a cleaning device cover 72 coupled to the cleaning device body 70.

The cleaning device is mounted on one side of the housing 10, preferably mounted in a straight line on the air supply pipe (20). In particular, the cleaning device may be fixed to the housing 10 by a cleaning device fixing means 94 including a bolt coupling and the like.

The cleaning device cover 72 has a chamber 92 including a predetermined space therein, the communication tube 76 to which waste water or fluid is supplied to the chamber 92 and a discharge port 73 for discharging the fluid. Each is formed. The fluid may comprise wastewater and is irrelevant as long as it can be pressurized when collected in a certain amount. The communication tube 76 may include an electronic or manual valve 74 that controls the fluid flowing into the chamber 76.

The cleaning device includes a driving bar 80 mounted to penetrate the cleaning device body 70 and operated by the diaphragm 78, and a diaphragm 78 supporting and pressing the driving bar 80.

The diaphragm 78 applies the force to the driving bar 80 to move the air supply pipe 20.

Hereinafter, a process of operating in the normal mode will be described with reference to FIG. 8.

When the microbubble diffuser is operated in the normal mode, the diaphragm 78 is driven because the valve 74 is opened to generate pressure in the chamber 92 when a predetermined amount of waste water is supplied to the chamber 92. Force is applied to the bar 80 so that the air supply pipe 20 is moved toward the cover 40. That is, the partition 32 and the inner surface of the cover 40 is in contact with each other, the passage 50 is formed so that the waste water can be moved along the passage (50).

Therefore, acceleration and rotational force are generated in the wastewater, and a vacuum is formed at the air outlet, so that the air is mixed with the inflow wastewater and microbubbles are generated. Since the specific operation method is the same as the content described with reference to FIG. 1, it will be omitted.

9 is a view showing a state in which the cleaning device is coupled to operate in the cleaning mode. This will be described below with reference to FIG.

Microbubble diffusers are used in adverse conditions to deal with wastewater contaminated by a variety of different materials. Therefore, it is desirable to periodically clean all wastewater lines with the clogging phenomenon of the microbubble diffuser of the present invention.

When the microbubble diffuser is used for a long time, since a large amount of foreign matter is contained in the wastewater, foreign matter accumulates in the passage 50 or the wastewater inlet 12, and thus the wastewater flow is not desired. In this case, if there is no cleaning mode, the user needs to disassemble the micro bubble diffuser and clean each part. On the other hand, in the present invention, the microbubble diffuser can be cleaned by driving using a machine rather than a human force.

First, the valve 74 is closed and the waste water or the fluid in the chamber 92 is discharged to the outside through the discharge pipe 73. The flow rate discharged through the discharge pipe 73 is less than the amount introduced from the valve 73 so that the pressure in the chamber 92 is maintained above a certain pressure when the valve is opened, but when the valve 74 is closed, the chamber 92 The pressure in) drops below a certain pressure.

While the pressure in the chamber 92 of the cleaning device is lowered below a predetermined pressure, the wastewater pressure of the wastewater chamber 14 is not changed, so that the wastewater pressure having a constant pressure is provided on one side of the air supply pipe 20. The air supply pipe 20 moves in the direction of the cleaning device so that the air supply pipe 20 moves toward the cleaning device body so that the partition wall 32 and the cover 40 are spaced apart from each other, and the cross-sectional area of the passage 50 increases. This is because an additional space is formed between the partition 32 and the cover 40.

Therefore, the overall flow rate of the wastewater line is increased and the foreign matter mainly existing between the partition wall 32 and the cover 40 having the smallest cross-sectional area is removed by a space to secure additionally.

An experimental example is demonstrated using the table below.

-Wastewater Type: Swine Livestock

-Processing amount: 30㎥ / day

Wastewater concentration: ph 8.9, BOD 7,000 mg / l, T / N 4,000 mg / l.

Design Factor Comparison division Aerobic Biological Reactor of the Invention General Aerobic Biological Aeration Tank Remarks Oxygen Transfer Efficiency (%) 30-40 5-10 BOD volume load
(kg / BOD / ㎥.d) 20-30 0.3-0.9 Reactor volume reduction MLSS concentration (mg / l) 5000-8000 2500-3500 TKN volume load (mg / ㎥.d) 0.8-1.6 0.2-0.4 Air supply Microbubble Diffuser air blower Reduced power costs Air supply method Natural air intake by microbubble diffuser Disk type diffuser Processing efficiency (%) BOD: 95% or more, nitrification: 98% or more High concentrations of organics and nitrogen are not possible

Design calculation comparison division Aerobic Biological Reactor of the Invention General Aerobic Biological Aeration Tank Volume (㎥) Organic matter removal 10 350 Total Nitrogen Removal 80 310 Air volume (㎥ / min) Organic matter removal 1.5 13 Total Nitrogen Removal 5 30 Blower capacity (㎥ / min) Organic matter removal 1.8 15.6 Total Nitrogen Removal 6 36 Wind pressure (kg / ㎠) 0.3 0.5 Diffuser Organic matter removal 4 65 Total Nitrogen Removal 14 65 Circulation pump capacity (㎥ / min) Organic matter removal 1.2 Total Nitrogen Removal 4.2 *. Total nitrogen removal is applied to the aeration tank and reactor volume on the denitrification activated sludge method.

Treatment efficiency comparison division Aerobic Biological Reactor of the Invention General Aerobic Biological Aeration Tank PH 5-6 8.8-9.5 Dissolved Oxygen Concentration (mg / ℓ) 5-6 0-1 BOD (mg / ℓ) Below 100 Normal treatment due to lack of dissolved oxygen T / N (mg / ℓ) Organic nitrogen 1100 NH3-N 100 1500 NO2-N
NO3-N 1500 Lack of dissolved oxygen prevents NH3 from oxidizing to NO2 and NO3 *. Total nitrogen removal is the result of applying the denitrification activated sludge method

As can be seen in the experimental example, when using the microbubble diffuser of the present invention, a higher wastewater treatment efficiency was obtained even when using a facility having a smaller capacity than a general aerobic biological aeration tank.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: micro bubble diffuser 200: chemical reaction tank
300: floating separation tank 400: wastewater supply line
500: treatment tank

Claims

In the flotation separation device for floating and separating the suspended matter contained in the wastewater,
A chemical reaction tank which is formed to introduce waste water and aggregates the suspended matter in the waste water by chemicals;
A microbubble diffuser for supplying microbubbles to the wastewater passing through the chemical reaction tank; And
Waste float receiving the micro bubble through the micro bubble diffuser is formed to be introduced with the micro bubble, floating separation tank for floating the floating in the waste water to the upper by the micro bubble to separate and discharge the floating floating in the upper;
Including wound separation device.

The method of claim 1,
The microbubble diffuser is configured to receive the wastewater that has passed through the chemical reaction tank to generate microbubbles in the wastewater, and the wastewater that has passed through the microbubble diffuser is configured to flow into the flotation separator while containing microbubbles. Separation device.

The method of claim 1,
Some of the wastewater enters the chemical reactor and the other is configured to flow into the microbubble diffuser, and the microbubble diffuser is configured to receive some of the wastewater to generate microbubbles in the wastewater, and passes through the microbubble diffuser. The waste water separation device is configured to flow into the waste water supply line connected to the floating separation tank from the chemical reaction tank in the state containing the micro bubble.

The method of claim 1,
Further comprising a treatment tank formed to store the treated water in a state in which the floating matter is removed and discharged from the floating separation tank,
The microbubble diffuser is configured to receive the treated water from the treatment tank to generate microbubbles in the treated water, and the wastewater passing through the microbubble diffuser is connected to the flotation separation tank from the chemical reaction tank while containing microbubbles. Floating separator configured to enter the waste water supply line.

The method according to any one of claims 1 to 4,
The micro bubble diffuser
A housing having a wastewater inlet through which wastewater is introduced; A part is inserted into the housing and accommodated therein, an air inlet is formed at one end thereof, and an air outlet is formed at the other end thereof, and an air supply pipe having a conical protrusion formed around the air outlet; And a cover coupled to the housing, one end of which surrounds the protrusion, maintains a predetermined distance from the other end, and a primary air wastewater mixing chamber is formed.
The air supply pipe is movably mounted in the housing,
The micro bubble diffuser,
The cleaning device body forming the exterior, coupled to the cleaning device body to form a chamber, the cleaning device cover formed with a communication tube for supplying waste water or fluid to the chamber, mounted through the cleaning device body is operated by water pressure And a cleaning device having a driving bar, and a diaphragm mounted on the driving bar to linearly reciprocate the air supply pipe.