KR102177110B1 - Flotaion type treatment apparatus for waste water - Google Patents

Abstract

The present invention relates to a wastewater treatment system with a minimized installation space that can easily remove the floc to be removed by using microbubbles and coarse air bubbles, and more particularly, to a dissolved water mixture of influent and gas flowing from the outside. A bubble generator that generates bubbles using a bubble generator, and the agglomerated floc reaction part that is connected to the bubble generator and generates a flocculating floc by mixing wastewater and generated bubble water flowing from the outside with at least one flotation aid, and the bubble A flotation-separation reaction unit connected to the generating unit and removing the agglomerated floc moving on the water surface to obtain purified treated water, wherein the bubbles generated through the bubble generating unit include fine bubbles having a particle size of 20 μm or less and a particle size of 20 It characterized in that it comprises a coarse air bubbles of more than ㎛.

Description

Microbubble-based flocculation wastewater treatment system {FLOTAION TYPE TREATMENT APPARATUS FOR WASTE WATER}

The present invention relates to a wastewater treatment system that minimizes the installation space that can easily remove the floc to be removed by using microbubbles and coarse air bubbles.

In general, the wastewater treatment system is a series of physical treatment (unit operation) and chemical or biological treatment (unit process: unit process) to purify livestock wastewater, domestic sewage, factory wastewater, fish farm wastewater, and landfill leachate. ) To remove pollutants from wastewater in a three-stage treatment.

In the primary treatment, screening in which relatively large contaminants contained in wastewater are filtered through a screen with uniformly sized holes, sedimentation in which contaminants heavier than water are separated by gravity, etc. By applying the unit operation of, the flotation contaminants and sedimentation contaminants contained in the wastewater are primarily removed.

In the secondary treatment, various chemicals such as coagulants, adsorbents, and disinfectants are used to coagulate and settle or adsorb suspended solids, and chemical unit processes such as killing pathogens, and decomposing non-settling biodegradable organic matter by the action of microorganisms It uses a biological unit process such as sedimentation and removal by converting it to or agglomerating into suspended matter, and mainly removing organic matter contained in wastewater.

In the tertiary treatment (or advanced treatment), various unit operations and unit processes mentioned in the first and second treatments are applied in combination, and ammonia, nitrogen, and phosphorus that are not easily removed in the first and second treatments. It removes various inorganic substances, heavy metals, synthetic organic substances, etc.

The general wastewater treatment method described above includes a process of removing various suspended matters such as organic matter, and sedimentation separation and flotation separation according to the physicochemical properties of the suspended matter (e.g., size, density, surface charge, etc.) Use the light selectively.

In the sedimentation separation, a coagulant is added to water, mixed and stirred to form a coagulum, and impurities are adsorbed thereto to precipitate. Particles heavier than water settle in stagnant water or extremely slow water to separate from water. This is the way.

The flotation separation refers to a phenomenon in which air is attached to a floating phase dispersed in the dispersion medium to float to the limit surface where the dispersion medium and air are in contact, and the specific gravity of the suspension is smaller than that of water or by attaching small bubbles to the suspension to reduce the specific gravity. It is a method of separating from water by stopping it on the surface of water.

However, the flotation separation as described above takes a long time for wastewater treatment because the floating matter (agglomerated flocs) settles in stagnant water or extremely slow water and separates from water, so it takes a long time to treat wastewater, and separates particles by flowing into a wide tank so that the water flows slowly. There is a problem in that the installation area and installation cost of the treatment plant are increased because the sedimentation basin must be installed.

Domestic registration patent No. 10-0446141 (announcement date: 2004.08.25.) Domestic registration patent No. 10-1718828 (announcement date: 2017.03.23.)

The present invention has been proposed to solve the above-described problems in the related art, and an object thereof is to provide a wastewater treatment system capable of taking time gains due to wastewater treatment while minimizing the installation area of a treatment plant.

In order to solve the above-described technical problem, the microbubble-based flocculation separation wastewater treatment system according to the present invention includes a bubble generator for generating bubbles by using dissolved water mixed with influent water and gas introduced from the outside, and the bubble generation. An agglomerated floc reaction unit that is connected to a part but is connected to the bubble generating unit and a coagulated floc reaction unit that mixes the wastewater introduced from the outside and the generated bubble water with at least one flotation aid to generate a coagulated floc and the coagulated floc that moves on the water surface Including a flotation-separation reaction unit for obtaining purified treated water, wherein the bubble generation unit comprises a mixer pump for dissolving influent water and gas for generating bubbled water to be supplied to the flocculant reaction unit and the flotation-separation reaction unit, and wastewater. The flotation aid is a micro-bubble supply member for supplying micro-bubbles, which is bubble water to be mixed in the flocculating floc reaction unit, and the flocculating floc flowing into the flotation-separating reaction unit is floated on the water surface so as not to precipitate. And a coarse air bubble supply member for generating coarse air bubbles to move in one direction, and the influent water introduced into the mixer pump uses treated water purified through the floating separation reaction unit, and the bubble generation unit It further comprises a mixing chamber member for dissolution, wherein the mixing chamber member has one end connected to the mixer pump and the other end is a hollow enclosure-shaped chamber connected to the microbubble supply member in a longitudinal direction inside the chamber. A plurality of mixing plates are provided adjacent to each other, and the mixing plate is provided to collide and mix the influent water and gas moved by the discharge pressure of the mixer pump from one end to the other end of the chamber, and the mixing plates have different diameters A plurality of ring plates arranged to be adjacent to each other to form a concentric circle having, and a rib formed so that at least two or more of the ring plates can be connected to each other to form a plurality of inlet holes in each of the ring plates, the The ratio of the dissolved water supplied to each of the micro-bubble supply member and the coarse-bubble supply member by the mixer pump is the micro-bubble When 50 to 70% of the dissolved water flows into the supply member, the remaining 30 to 50% of the dissolved water is supplied to the coarse air bubble supply member so that coarse and fine bubbles can be generated, and the particle size of the generated coarse air bubbles Is at least 20㎛ or more, but the particle size of the microbubbles is formed to be less than 20㎛, which has a high density compared to the particle size of the coarse air bubbles, so that the retention time of the microbubbles adhering to the agglomerated floc can be extended. The bubble supply member includes a nozzle body, a cover body, and a collision pipe, wherein one end of the nozzle body is connected to the mixer pump or the mixing chamber member to allow dissolved water to flow into the nozzle body, and the other end is the agglomeration The flock reaction unit is connected to the tube so that the microbubbles generated through the microbubble supply member can be supplied through a plurality of distribution holes, and the distribution holes are perforated in the nozzle body so as to each have an inclination angle to form the distribution holes. It has a structure in which a vortex phenomenon occurs in the dissolved water discharged through and can be discharged, and the cover body is formed in a hollow tube shape, but the lower part forms an inner diameter larger than the outer diameter of the nozzle body, and the melt discharged through the distribution hole It is coupled to the other end of the nozzle body so that airtightness can be maintained so that a space for water vortex can be secured, and the upper part has a structure that can be inserted into the connecting tube extending from the coagulation floc reaction part. An orifice is perforated on the upper surface of the cover so that it can be easily supplied to the inside of the agglomerated floc reaction unit through the connection pipe without separation of air bubbles, and the inner wall of the orifice has a shape of a venturi tube with a central portion concave. Micro-bubbles before flowing into the connection pipe collide with each other to generate bubbles of a desired particle size, and the collision pipe includes a pipe body and a collision wall, and the pipe body has a column shape and the dissolved water extends from the upper surface to the lower surface. A plurality of hollow portions passing through are radially perforated, and the collision wall is characterized in that a plurality of protrusions are formed so as to have different lengths in the longitudinal direction on the inner wall of each of the hollow portions.

In addition, the agglomerated floc reaction unit includes a plurality of mixing tanks connected to each other by a pipe and a mixing means provided outside the mixing tank and mixing the mixture accommodated in the mixing tank by a vortex phenomenon, and the mixing tank is wastewater A first tank in which a first mixture in which and microbubbles are mixed is accommodated, a second tank connected to the first tank and in which a second mixture in which the first mixture and a flocculant, which is one of the flotation aids, is mixed, the second tank And a third tank connected to the second tank and receiving the agglomerated floc in which the second mixture and the polymer, which is one of the flotation aids, are mixed, and the mixing means has a predetermined diameter and is inside the pipe in a longitudinal direction. It is preferable to include a disk-shaped vortex plate provided adjacent to each other, and at least one perforation formed in the vortex plate, and a vortex forming hole formed so that the mixture accommodated in the mixing tank can vortex in the pipe.

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According to the present invention, the micro-bubbles are provided through the bubble generation unit so that the microbubbles can adhere to the cohesive floc differently from the prior art, but the coarse air bubbles, which are other bubbles supplied from the bubble generation unit, are used in the floating reaction tank. The floc is prevented from being precipitated in the flotation tank and floats above the water surface, thereby facilitating the removal of the floc.

In addition, the installation area is minimized differently from the prior art, so that the restriction of the installation place is unnecessary.

1 is a conceptual diagram showing a microbubble-based flocculation separation wastewater treatment system according to the present invention.
Figure 2 is a conceptual diagram showing a bubble generating unit for the wastewater treatment system for coagulation-floating separation based on microbubbles according to the present invention.
Figure 3 is a view showing a micro-bubble supply member for the micro-bubble-based flocculation separation wastewater treatment system according to the present invention.
Figure 4 is a view showing the chunggol tube for the microbubble-based cohesive injury separation wastewater treatment system according to the present invention.
Figure 5 is another embodiment of Figure 3;
6 is a view showing a mixing chamber member for a wastewater treatment system for coagulating flotation separation based on microbubbles according to the present invention.
7 is a view showing a coagulation floc reaction unit for the coagulation floc separation wastewater treatment system based on microbubbles according to the present invention.
Figure 8 is a view showing the connection between the mixing means and the first to third tanks of Figure 7;
9 is an embodiment of the mixing means for FIG. 8;
10 is a view showing a flotation separation reaction unit for the flocculation separation wastewater treatment system based on microbubbles according to the present invention.

Hereinafter, a microbubble-based coagulation-floating wastewater treatment system (hereinafter, simply referred to as a'wastewater treatment system') according to the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in FIG. 1, the wastewater treatment system 1 according to the present invention largely includes a bubble generating unit 100, a coagulation floc reaction unit 200, and a flotation separation unit 300.

In more detail, as shown in Figs. 2 to 6, the bubble generating unit 100 is bubbled by using dissolved water in which influent flowing from the outside and gas (for example, oxygen or ozone) are mixed. A configuration for generating bubble water capable of generating, for example, includes a mixer pump 110, a micro-bubble supply member 120, and a coarse air-bubble supply member 130.

Referring to FIG. 2, the mixer pump 110 is pipe-connected so that the treated water of the floating separation reaction unit 300, which will be described later, can be supplied, and the other end is a microbubble supply member 120 and a coarse air bubble supply member 130. ), it is installed in a pipe-connected structure so that bubble water can be supplied jointly.

At this time, the influent water supplied to the mixer pump 110 is installed in a structure in which a part of the treated water purified by the flotation separation reaction unit 300 can be introduced, and the treated water introduced outside the mixer pump 110 and It is preferable that a gas inlet pipe through which gas to be dissolved is introduced is further installed (see FIG. 10).

The dissolved water generated by the mixer pump 110 rapidly shears the supplied gas so that it can be dissolved together with the treated water, and supplies the microbubble supply member 120 and the coarse air bubbles through the mixer pump 110 The ratio of the dissolved water jointly supplied to the member 130 is supplied to the microbubble supply member 120 to have a ratio of 50 to 70%, and the coarse air bubble supply member 130 to have a ratio of 30 to 50%.

Here, the reason why a relatively small amount of dissolved water is supplied to the coarse air bubble supply member 130 is that the coarse air bubbles generated through the coarse air bubble supply member 130 are formed by the flocculation floc (F) in the flotation separation reaction unit 300. To prevent precipitation, but because the coagulation floc (F) is intended to move in one direction by the discharge pressure generated when discharging the corresponding coarse air bubbles, even at a ratio less than the dissolved water supplied to the microbubble supply member 120 This is because the above-described effect can be satisfied (see Fig. 10).

In addition, check valves (not shown) capable of opening/closing control to a control signal are installed in the micro-bubble supply member 120 and the coarse-bubble supply member 130 connected to the mixer pump 110, respectively. You can make it available.

As shown in FIG. 3, the microbubble supply member 120 is configured to generate the dissolved water supplied through the mixer pump 110 into microbubbles, and the nozzle body 121, the cover body 124, and the collision pipe ( 125).

The nozzle body 121 has one end connected to the mixer pump 110 or the mixing chamber member 140 to allow the dissolved water to flow into the nozzle body 121, and the other end with the coagulation floc reaction unit 200 The tube is connected so that the micro-bubbles generated through the micro-bubble supply member 120 can be supplied.

The other end of the nozzle body 121 may have a plurality of distribution holes 122 formed radially on its outer surface, and the length of the nozzle body 121 according to the capacity of the microbubbles to be introduced into the agglomerated floc reaction unit 200 It has a structure in which a plurality of cells are formed adjacent to each other in the direction so that the capacity of the corresponding microbubbles can be increased.

At this time, the plurality of distribution holes 122 are formed in the nozzle body 121 to have an inclination angle in one direction, so that a vortex phenomenon occurs in the dissolved water discharged through the distribution hole 122 to have a structure capable of being discharged. It is desirable to do.

Thus, the dissolved water introduced into the nozzle body 121 by the discharge pressure of the mixer pump 110 is discharged to have a vortex phenomenon through a plurality of distribution holes 122, and when colliding with the collision pipe 125 to be described later By increasing the impact, it is possible to maximize the generation rate of microbubbles.

The cover body 124 has a hollow tube shape, and as shown, the lower part is coupled to the other end of the nozzle body 121 so that airtightness can be maintained, and the upper part is the outer surface of the cohesive floc reaction part 200 It is formed to have a structure that can be inserted into the extended connection pipe so that it can be easily supplied to the inside of the coagulation floc reaction unit 200 through the connection pipe without separation of the generated microbubbles.

At this time, the lower part of the cover body 124 is formed in a tubular shape having an inner diameter larger than the outer diameter of the nozzle body 121 so that a space for vortexing the dissolved water discharged through the distribution hole 122 can be secured, and the distribution hole (122) It is preferable to be coupled to the other end of the nozzle body 121 so that the whole is wrapped.

The upper surface of the cover body 124 has a structure in which a plurality of orifices 123 are perforated symmetrically to each other so that microbubbles generated by the collision tube 125 can be easily introduced into the connection tube.

At this time, the inner wall of the Opiris 123 has a shape of a venturi pipe whose central portion is concave in the longitudinal direction to easily cause a Venturi effect, so that microbubbles before flowing into the connection pipe collide with each other. It is desirable to be able to generate bubbles of the desired particle size.

In addition, the upper surface of the cover body 124 on which the opiris 123 is formed may be formed to have a thicker thickness T as necessary to further maximize the effect of generating micro-bubbles (see FIGS. 3 and 5 ).

Referring to FIG. 4, the tube body 126 is formed in a column shape as a whole, but the hollow part 127 through which the dissolved water passes through is formed by perforation from the top to the bottom, based on a random center point (P) of the tube body 126. It has a radially perforated shape.

At this time, a plurality of collision walls 128 protrude from the hollow portion 127 in the direction of an arbitrary central point (P') on the inner wall of each of the hollow portions 127, and the dissolved water flowing into the hollow portion 127 It is desirable to collide so that microbubbles can be generated.

In addition, by making the protruding length of the collision wall 128 different from each other, the number of collisions of the dissolved water can be made more easily, and as shown, the cover body 124 so that the collision zone Z can be enlarged. ) A plurality of collision tubes 125 are installed in the longitudinal direction so that the particle size of microbubbles, etc. can be adjusted (see FIG. 5).

On the other hand, the bubble generating unit 100 in the present invention is the dissolved water dissolved in the mixer pump 110 by pipe connection between the mixer pump 110 and the microbubble supply member 120 described above, referring to FIG. A mixing chamber member 140 capable of maximizing the degree of dissolution of the mixture may be further included. For example, the mixing chamber member 140 includes a chamber 141 and a mixing plate 145.

The chamber 141 is formed in the shape of a hollow enclosure, but has one end connected to the mixer pump 110 to allow the dissolved water to flow into it, and the other end connected to the nozzle body 121 and connected to the mixing plate 145 It has a structure in which the dissolved water dissolved by the can be supplied.

In the inner wall of the chamber 141, a plurality of mixing plates 145 have the same distance from each other, but a coupling groove (not shown) adjacent to each other is further provided to prevent the flow of the mixing plate 145 by the pressure in which the dissolved water is introduced. It is formed so that the outer surface of the mixing plate 145 and the shape fit can be fitted.

The mixing plate 145 is formed in the chamber 141 in a lengthwise direction, and the ring plate 142 and the rib are configured to be mixed while passing through the dissolved water proceeding from one end of the chamber 141 to the other end. It includes (144).

As shown, the ring plate 142 is formed as a module so that a plurality of ring-shaped bodies having different diameters form a concentric circle, and at least two of the ring plates 142 are formed in a radial shape. It has a structure that is connected to each other by

At this time, the plurality of ring plates 142 connected by the plurality of ribs 144 form an inlet hole 143 between the ribs 144 so that the dissolved water can pass through the inlet hole 143 desirable.

In addition, the ribs 144 provided on the ring plate 142 provided as each module are formed to face each other so as not to have the same shape, so that the dissolution rate of the dissolved water can be maximized.

That is, when dissolved water sequentially passes through the inlet holes 143 formed in the ring plate 142 provided in the chamber 141 in a number of longitudinal directions, the corresponding dissolved water is prevented from interference by the ribs 144 disposed at different positions. By being agitated, the dissolution rate of the dissolved water consisting of gas and influent can be maximized.

To this end, the rib 144 may be formed to have various shapes such as straight lines and curves.

As shown in Figs. 3 to 5, the coarse air bubble supply member 130 receives dissolved water to generate coarse air bubbles, but supplies the coarse air bubbles to the flotation separation reaction unit 300 to precipitate the flocculating floc (F). The micro-bubble supply member has the same structure as the micro-bubble supply member 120 described above with a configuration for preventing and allowing the agglomerated floc (F) to move in one direction, and not to obscure the subject matter of the present invention. Substitute the description of (120).

However, unlike the micro-bubble supply member 120 described above, the coarse air bubble supply member 130 in the present invention generates coarse air bubbles through the dissolved water introduced from the mixer pump 110 connected to one end, but the other end It is connected to the floating reaction tank 310 of the floating separation reaction unit 300 to be described later and has a structure in which the coarse air bubbles can be discharged into the floating reaction tank 310.

At this time, the coarse air bubble supply member 130 is connected to the bottom of one side of the floating reaction tank 310 (preferably a position symmetrical with the treated water receiving part) to be discharged into the floating reaction tank 310 and the coarse air bubbles. It is preferable to make the coagulated floc (F) settled in contact with (including coarse air bubble discharge pressure) and float to the water surface, and further, allow the coagulated floc (F) to move toward the treated water receiving tank 312 (Fig. 10).

In addition, the particle size of the coarse air bubbles generated through the coarse air bubble supply member 130 is at least 20 μm or more, but the particle size of the fine bubbles is formed to be less than 20 μm, which has a higher density compared to the particle size of the corresponding coarse air bubbles, By contacting with F), the agglomerated floc (F) can be sufficiently floated to the water surface.

In addition, the agglomerated floc reaction unit 200 is a configuration for producing a flocculating floc (F) by mixing the above-described microbubbles and at least one flotation aid 215, as shown in Figs. It includes a mixing tank 210 and mixing means 220 of.

The mixing tank 210 is installed to have a tube-connected shape adjacent to each other, as shown in FIGS. 7 and 8, but each of the mixing tanks 210 in the direction of the floating reaction tank 310 from the microbubble supply member 120 To have a structure that can be moved sequentially.

For example, the mixing tank 210 in the present invention is one of a first tank 211 in which a first mixture is generated in which the wastewater and microbubbles are in contact, and the first tank 211 is connected to a pipe, but the flotation aid 215 The second tank 212 and the second tank 212 are pipe-connected to the second tank 212 and the second tank 212 in which the phosphorus coagulant and the first mixture are mixed to form a second mixture, and the polymer and the second mixture are one of the flotation aids 215 It may include a third tank 213 for finally generating a cohesive floc F through a plurality of mixing steps to be mixed.

Meanwhile, a mixing means 220 for mixing and producing a first mixture, a second mixture, and a coagulated floc (F) may be provided above each of the first to third tanks 211, 212, 213, and the mixing means 220 ) Is formed in a plate shape, but as shown, is installed inside the pipes 214 provided above the first to third tanks 213 so that two or more substances can be mixed by a vortex phenomenon.

For example, the mixing means 220 is made in the shape of a circular plate having a predetermined diameter as a whole in the first embodiment, but consists of a vortex plate 221 in which a plurality of vortex forming holes 222 are formed radially (Fig. 9 (( a)(b)).

The vortex plate 221 is provided with a plurality of vortex forming holes 222 formed in each of the vortex plates 221 in the longitudinal direction inside the pipe 214 through which wastewater and fine bubbles are introduced together so that they do not face each other. It is installed in a structure that can cause eddy currents so that wastewater and microbubbles can be mixed with each other.

At this time, the plurality of vortex forming holes 222 formed radially can be formed so that the connection hole 223 connected to each other in the center of the vortex plate 221 can be formed, as shown, the connection hole 223 It is preferable that the formed vortex plate 221 has a structure so that the connection hole 223 is not formed between the pair of vortex plates 221.

Through this, the vortex plate 221 in which the connection hole 223 is not formed when the wastewater and microbubbles to form the first mixture pass through the plurality of vortex plates 221 and flow into the first tank 211 In the) part, wastewater and micro-bubbles stay for a while and are mixed, but in the vortex plate 221 in which the connecting hole 223 is formed, the mixing rate is maximized by executing a repetitive operation to easily cause a vortex phenomenon while rapidly proceeding. It is done.

In addition, unlike the first embodiment described above, the mixing means 220 may form one vortex forming hole 222 in the vortex plate 221, as shown in the second embodiment (Fig. 9). (c)(d)).

At this time, the vortex forming holes 222 perforated in each of the vortex plates 221 provided adjacent to each other in the pipe 214 according to the second embodiment are disposed so as not to face each other, so that wastewater and microbubbles are disposed in the pipe ( It is preferable to arrange it so that eddy current can occur when passing through 214).

The mixing means 220 according to the second embodiment increases the time that wastewater and microbubbles to be mixed can stay in each vortex plate 221, unlike the first embodiment, so that the microbubbles can adhere to the wastewater. You have the advantage of securing time.

In addition, as shown, the mixing means 220 is a pair of vortex-type vertically or horizontally on each of the vortex plates 221 provided adjacent to each other along the longitudinal direction of the pipe 214 in the third embodiment. The success 222 is perforated so that the wastewater and microbubbles penetrating the inside of the pipe 214 can be mixed with each other by a vortex phenomenon (see (e) (f) of FIG. 9 ).

At this time, the vortex forming hole 222 is disposed so as not to face each other on the pair of vortex plates 221 disposed inside the pipe 214 to face each other, and the vortex forming hole 222 is a head forming hole ( It is perforated in a'T' shape consisting of 222a) and a joint hole 222b, and the head forming hole 222a is preferably perforated to have a semicircular shape.

The third embodiment is formed to satisfy both the effects of the first and second embodiments described above, and is disposed so that wastewater and fine bubbles penetrating the inside of the pipe 214 do not face each other when passing through the pipe 214. The vortex phenomenon can easily occur through the head forming hole (222a), and through the joint hole (222b), the corresponding wastewater and microbubbles temporarily stay in each vortex plate 221 so that the corresponding microbubbles can attach to the wastewater. You have the advantage of securing the time you have.

In addition, the mixing means 220 in the present invention can be used as a mixing means 220 for producing the first to third mixtures by selecting any one of the first to third embodiments, and if necessary, the first A mixture may be formed by installing at least one of the mixing means 220 according to the third embodiment to the top of the first to third tanks 213 in the same or movable embodiment.

In addition, as shown in FIG. 10, the flotation separation reaction unit 300 is configured to obtain purified treated water by removing the coagulation floc F generated through the coagulation floc reaction unit 200 described above. It includes a floatation reaction tank 310 and a skimmer 320.

For example, the floating reaction tank 310 has a shape of a hollow body as a whole, but is accommodated in the generated agglomerated floc (F) so that the agglomerated floc (F) floats on the water surface and can be removed through a skimmer 320 to be described later. Has.

The inside of the floating reaction tank 310 can have a space divided from each other by a plurality of partition walls 314, and the divided space means, as shown, a purification treatment tank 311 for removing the flocculating floc F , A treated water receiving tank 312 in which purified treated water is accommodated, and a sludge receiving tank 313 in which the removed coagulated floc F is accommodated and discharged to the outside.

At this time, the inside of the purification treatment tank 311 is a guide plate for guiding the coarse air bubbles to be discharged when the coarse air bubbles for floating the flocculation Flock F that settles on the bottom surface of the purification treatment tank 311 are discharged. The guide plate 315 is installed to have a length in the vertical direction, and the guide plate 315 is formed to have an inclination at a predetermined angle, and at the same time, the upper portion of the guide plate 315 is bent to stably settled by coarse air bubbles. It is desirable to be able to.

The purification treatment tank 311 is formed so that the treated water receiving tank 312 and the inside thereof can communicate with each other, but preferably prevents the agglomerated floc F from flowing into the treated water receiving tank 312 on the water surface. It is formed so as to be connected to each other in the lower part of the purification treatment tank 311 so that a separate filter (not shown) is provided at the joint so that foreign matters that cannot be removed are introduced into the treated water receiving tank 312. Prevent it.

The purification treatment tank 311 is connected to the coagulation floc reaction unit 200 and has a structure in which the coagulation floc F can be introduced into the purification treatment tank 311, and the lower portion thereof is a coarse air bubble supply member 130 It is connected to and has a structure in which coarse air bubbles can be discharged from the inside of the purification treatment tank 311.

In addition, a skimmer 320 is installed above the purification treatment tank 311 to allow the skimmer 320 to remove the flocculated floc F floating on the water surface in the purification treatment tank 311.

The treated water receiving tank 312 is dividedly formed through a partition wall 314 on one side of the purification treatment tank 311, and the lower portion thereof is formed in communication with the purification treatment tank 311, so that the treated water from which the flocculant F has been removed Make it acceptable.

The lower part of the treated water receiving tank 312 is connected to the mixer pump 110 described above, so that part of the treated water (about 20 to 40%) is introduced into the mixer pump 110 to generate fine bubbles or coarse bubbles. It is used as water, and the remaining treated water (about 60-80%) is discharged to the outside.

The sludge receiving tank 313 forms a space divided by the partition wall 314 between the purification treatment tank 311 and the treated water receiving tank 312, and agglomeration to be removed obtained through a skimmer 320 to be described later. The floc F is accommodated and has a structure capable of being discharged to the outside of the sludge receiving tank 313.

The upper part of the sludge receiving tank 313 has an open shape so that the floc Flocked continuously rolled up from the skimmer 320 can be quickly received, and the lower part has a predetermined angle in the direction of the purification treatment tank 311 At least one inflow prevention plate 316 is installed to increase the effect of blocking the inflow of foreign substances or flocs of treated water flowing from the purification treatment tank 311 to the treated water receiving tank 312. do.

The skimmer 320 is a configuration for providing a flocculating floc F floating on the water surface of the purification treatment tank 311 by rotation to be accommodated in the sludge receiving tank 313 described above. 321 and a plurality of rollers 322 rotatably installed inside the belt 321 by a drive motor (not shown) rotatably.

The skimmer 320 is located above the purification treatment tank 311, but the lower portion thereof is installed so as to be close to the water surface to remove the flocculated floc F floating on the water surface by rotation.

At this time, a hook 324 having a straight or curved shape is formed on the outer surface of the belt 321 constituting the skimmer 320 to have a structure that is easy to remove the cohesive floc (F), and the belt 321 is rolled up. It is preferable that a plurality of through holes 323 are formed so that the moisture generated in the flocculent floc (F) passes through the belt 321 and is received again in the purification treatment tank 311.

The wastewater treatment system 1 according to the present invention constituted as described above provides the corresponding microbubbles through the bubble generator 100 so that the microbubbles adhere to the coagulation floc F differently from the prior art, but the floating reaction tank ( 310) by using the coarse air bubbles, which are other bubbles supplied from the bubble generating unit 100, to prevent the flocculation floc F from being settled in the floating reaction tank 310 and float above the water surface. It makes it easy to remove the floc (F).

In addition, the installation area is minimized differently from the prior art, so that the restriction of the installation place is unnecessary.

1: Microbubble-based flocculation separation wastewater treatment system according to the present invention
100: bubble generation unit 110: mixer pump
120: fine bubble supply member 130: coarse air bubble supply member
140: mixing chamber member 200: cohesive floc reaction unit
210: mixing tank 220: mixing means
300: floating separation reaction unit 310: floating reaction tank
320: skimmer F: agglomerated floc

Claims (4)

A bubble generator 100 for generating bubbles by using dissolved water obtained by mixing inflow water and gas introduced from the outside;
An agglomerated floc reaction unit 200 connected to the bubble generating unit 100 to generate a cohesive floc (F) by mixing wastewater introduced from the outside and the generated bubble water with at least one flotation aid 215; And
A flotation separation reaction unit 300 connected to the bubble generating unit 100 to obtain purified treated water by removing the flocculating floc F moving on the surface of the water;
The bubble generator 100 includes a mixer pump 110 for dissolving influent water and gas for generating bubbled water to be supplied to the coagulation floc reaction unit 200 and the flotation separation reaction unit 300, wastewater and the The flotation aid 215 is a microbubble supply member 120 for supplying microbubbles, which are bubble water to be mixed in the flocculation floc reaction unit 200 together, and the flocculation floc (F) introduced into the flotation separation reaction unit 300 ) Is floated on the water surface so as not to settle, but includes a coarse air bubble supply member 130 for generating coarse air bubbles for moving the coagulated floc (F) in one direction, and the influent water flowing into the mixer pump 110 is Using the treated water purified through the flotation separation reaction unit 300,
The bubble generating unit 100 further includes a mixing chamber member 140 for dissolving influent water and gas into each other, wherein the mixing chamber member 140 has one end connected to the mixer pump 110 and the other end A chamber 141 having a hollow casing shape connected to the microbubble supply member 120 and a plurality of chambers 141 adjacent to each other in the longitudinal direction, the mixer in the direction from one end to the other end of the chamber 141 It includes a mixing plate 145 provided to collide and mix the influent water and gas moved by the discharge pressure of the pump 110, and the mixing plates 145 are adjacent to each other to form concentric circles having different diameters. A plurality of ring plates 142 arranged so as to be formed so that at least two of the ring plates 142 can be connected to each other, so that a plurality of inlet holes 143 can be formed in each of the ring plates 142 Including a rib 144,
The ratio of the dissolved water supplied to the microbubble supply member 120 and the coarse air bubble supply member 130 by the mixer pump 110 is dissolved in the microbubble supply member 120 at a rate of 50 to 70% When water flows in, the remaining 30-50% of dissolved water is supplied to the coarse air bubble supply member 130 so that coarse air bubbles and fine bubbles can be generated, and the particle size of the generated coarse air bubbles is 20 μm or more, but fine bubbles. The particle size of is formed to be less than 20㎛, which has a high density compared to the particle size of the coarse air bubbles, so that the retention time of the microbubbles adhering to the agglomerated floc (F) can be extended,
The microbubble supply member 120 includes a nozzle body 121, a cover body 124, and a collision pipe 125, and the nozzle body 121 has one end of the mixer pump 110 or the mixing chamber member It is connected to the pipe 140 so that the dissolved water can be introduced into the nozzle body 121, and the other end is connected to the coagulation floc reaction unit 200 to provide the fine particles generated through the microbubble supply member 120. To allow air bubbles to be supplied through a plurality of distribution holes 122, the distribution holes 122 are perforated in the nozzle body 121 to each have an inclination angle, and the dissolved water discharged through the distribution hole 122 The cover body 124 is formed in a hollow tubular shape, and the lower portion forms an inner diameter larger than the outer diameter of the nozzle body 121 so that the distribution hole 122 can be discharged. The nozzle body 121 and the other end of the nozzle body 121 and the other end of the nozzle body 121 are coupled to be kept airtight so that a space for vortexing of the dissolved water discharged through the discharged water can be secured. Opiris 123 is perforated on the upper surface of the cover body 124 so that it can be easily supplied to the inside of the agglomerated floc reaction unit 200 through the connection tube without separation of the generated microbubbles. Is formed, and the inner wall of the opiris 123 has a shape of a venturi tube in which the central portion is concave, so that micro bubbles before flowing into the connection tube collide with each other to generate bubbles of a desired particle size, and the collision tube 125 includes a tube body 126 and a collision wall 128, wherein the tube body 126 has a column shape, and a plurality of hollow portions 127 through which the dissolved water penetrates are formed radially. , The collision wall 128 is a microbubble-based cohesive floatation wastewater treatment system, characterized in that a plurality of protrusions are formed on the inner wall of each of the hollow portions 127 to have different lengths in the longitudinal direction.
delete delete The method of claim 1,
The agglomerated floc reaction unit 200
A plurality of mixing tanks 210 connected to each other by a pipe 214; And
Includes; a mixing means 220 provided outside the mixing tank 210 and mixing the mixture accommodated in the mixing tank 210 by a vortex phenomenon,
The mixing tank 210 is connected to the first tank 211 in which the first mixture in which wastewater and microbubbles are mixed, and the first tank 211 are connected to the first mixture and the flotation aid 215 The agglomeration of the second tank 212 in which the second mixture in which one of the coagulants is mixed is accommodated, which is connected to the second tank 212, but which is one of the second mixture and the flotation aid 215 It includes a third tank 213 in which the floc (F) is accommodated,
The mixing means 220 has a predetermined diameter, but is formed with at least one perforation formed in a disk-shaped vortex plate 221 and the vortex plate 221 having a plurality of adjacent to each other in the longitudinal direction inside the pipe 214 Microbubble-based flocculation separation wastewater treatment system, characterized in that it comprises a vortex forming hole (222) formed so that the mixture accommodated in the mixing tank (210) vortex in the pipe (214).

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