KR100696604B1 - System and Method for Treating Discharge Water of Industrial Facility - Google Patents

Abstract

The present invention relates to an industrial facility effluent treatment system and method thereof. More specifically, the foam generated from the discharge water discharged to the river, lake or sea after being used as cooling water or circulating water in a power plant or steel mill is induced by the bubble collecting device, and then the collected bubbles are collected using a bubble treatment device. An industrial facility effluent treatment system and method for removing the same.

The present invention, the bubble collecting device 100 including a buoyancy material and a guide blade for induction connected to the end of the buoyancy material and a bubble collecting unit provided in the central portion of the buoyancy material, and the bubbles collected by the bubble collecting device 100 A collecting tank 110 for storing a liquid, a settling tank 120 for precipitating a precipitate in the foam liquid, an aerobic tank for primary decomposition / filtration of the supernatant of the settling tank 120, and an anaerobic tank for secondary decomposition / filtration It provides an industrial facility effluent treatment system comprising a reaction tank 130 having a and a treatment method thereof.

Power station, coolant, foam, foam capture, foam treatment

Description

System and Method for Treating Discharge Water of Industrial Facility

1 is a block diagram of an industrial facility wastewater treatment system according to a preferred embodiment of the present invention;

2 is a perspective view of a bubble collecting device in an industrial facility wastewater treatment system according to a preferred embodiment of the present invention,

Figure 2a is a perspective view of the buoyancy material coupled to the foam fence in the bubble collecting device of the industrial facility wastewater treatment system according to a preferred embodiment of the present invention,

Figure 2b is a perspective view of a cylindrical buoyancy material in the bubble collection device of the industrial facility wastewater treatment system according to a preferred embodiment of the present invention,

3 is a schematic diagram for treatment of foam liquid in an industrial facility wastewater treatment system according to a preferred embodiment of the present invention;

4 is a detailed configuration diagram of a reaction tank in an industrial facility wastewater treatment system according to a preferred embodiment of the present invention;

5 is a plan view of the anaerobic tank of the reaction tank in the industrial facility effluent treatment system according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: bubble processing device 110: water tank

120: precipitation tank 130: reaction tank

200a, 200b: buoyant material 202a, 202b: guide blade for foam induction

204: bubble collecting unit 206: bubble collecting plate

208: bubble collecting wall 210: bubble outlet

230: foam fence integrated buoyancy material 240: cylindrical buoyancy material

340: aerobic tank 350: anaerobic tank

The present invention relates to an industrial facility effluent treatment system and method thereof. More specifically, the foam generated from the discharge water discharged to the river, lake or sea after being used as cooling water or circulating water in a power plant or steel mill is induced by the bubble collecting device, and then the collected bubbles are collected using a bubble treatment device. An industrial facility effluent treatment system and method for removing the same.

Cooling or circulating water used for cooling power generation facilities in power plants, etc., uses fresh water for power plants located near rivers or reservoirs, and sea water for power plants located on beaches. Such cooling water or circulating water is discharged to the outside after it is used for cooling the power plant. The discharged water is discharged at a temperature of about 5 ° C. to 7 ° C. higher than the temperature at the time of intake, and some microorganisms in the sea water are known to be shocked and killed during the heat exchange process.

On the other hand, when a large amount of cooling water or circulating water is drained, a large amount of bubbles are generated in the drainage outlet. At this time, various floats are attached to the surface of bubbles first formed to promote the growth of bubbles and bubbles are formed over time. The bubbles generated naturally disappear as time goes by. There are many differences in the degree of extinction depending on the temperature and the degree of contamination.

In general, the foam itself generated when discharged after being used as cooling water or circulating water in a power plant, etc. is known to have little harmful effects, but it is not aesthetically pleasing and gives an impression that it is dirty or harmful to the general public. In addition, when bubbles spread to the farms around the power plant, there is a problem that the oxygen supply to the water is cut off, which adversely affects aquatic organisms.

On the other hand, in the case of industrial wastewater discharged after the use as industrial water in steel mills or industrial sites, even if the purification process, there is a problem that a certain amount of heavy metal is contained in the foam generated during the discharge.

In order to solve this problem, a method used in the conventional defoaming was to use an antifoaming agent. Antifoaming agent is a drug used to remove harmful bubbles, and the antifoaming action has a function of breaking bubbles and suppressing bubbles. However, in the case of using an antifoaming agent, secondary water pollution occurs due to the addition of the antifoaming agent, which is not a good method in terms of pollution prevention, and there is a problem that the cost for the antifoaming agent is increased.

A representative method for preventing the spread of bubbles generated in industrial facilities is to install a foam fence (Foam Fence). However, as the conventional foam fence only prevents the spread of the foam, a separate operation of removing the foam trapped in the foam fence is required separately, and when the collected foam is accumulated, there is a problem of overflowing the foam fence.

In addition to foam fences, equipment and facilities have been proposed for removing bubbles generated during the discharge of cooling or circulating water or industrial wastewater. Representatives have been proposed, such as a facility that destroys the bubbles generated by using the watering equipment or collects the bubbles in a separate storage tank.

However, such a method or equipment has a disadvantage in that the collection efficiency is lowered even if only the function of limiting only the bubble is released or some bubble is collected. In addition, there is a disadvantage that it is difficult to treat the collected bubbles to the outside or the collected bubbles cannot be processed immediately.

In addition, the conventional defoamer has a problem that it does not effectively respond to such changes in external conditions when the water level conditions of the sea or river from which the cooling water or the circulating water is discharged or are affected by the waves. In addition, the foam contains the carcass of the flora and fauna plankton has a problem causing eutrophication of the sea or rivers.

On the other hand, by examining the components of the foam liquid generated when the cooling water or circulating water is discharged, the following results were obtained.

Analysis of the components of the foam liquid collected from the discharge port and compared with the sea water are shown in Table 1.

division sea water Foam 1 time Episode 2 3rd time 4 times 5 times Average pH 7.7 6.2 6.8 7.4 6.3 7.1 6.76 Chemical oxygen demand (mg / l) 2.2 55.8 68.4 60.7 49.5 83.2 63.52 SS (mg / l) 6.4 532.3 636.2 879.5 715.2 610.7 673.0 Total Nitrogen (mg / l) 0.990 36.780 22.510 16.682 29.630 19.180 24.956 Total phosphorus (mg / l) 0.048 4.460 3.720 1.559 3.920 2.017 3.135

The collected samples were analyzed according to the process test method (sea water analysis). The foam solution was precipitated for 30 minutes, and then the supernatant was collected and used as an analytical sample.

As shown in Table 1, the chemical oxygen demand (COD) of the supernatant in the foam liquid was found to be about 30 times higher than that of the seawater. COD levels were between 87.2 and 216.3 mg / l when analyzed separately with precipitates. On the other hand, SS (suspended solid: suspended solids) was about 100 times the amount of sea water, and when analyzed with the precipitate appeared to be 1,360 mg / l to 2,960 mg / l.

On the other hand, most heavy metals were not detected in the foam solution (some traces), but it was confirmed that anionic surfactants and trace amounts of zinc were detected.

Accordingly, it is preferable that the bubbles generated at the discharge port are collected fundamentally, treated by an appropriate treatment system, and then discharged again.

In order to solve the above problems, the present invention is used as a cooling water or a circulating water in a power plant or a steel mill, and then the bubbles generated from the discharged water discharged to a river, a lake, or the sea are collected and guided to a bubble collecting device. It is an object of the present invention to provide an industrial facility effluent treatment system and method for decomposing by using microorganisms present in the natural state by the foaming facility.

In order to achieve the above object, the present invention, in the system for collecting and processing the bubbles generated from the discharge water of the industrial facility, buoyancy materials (200a, 200b) floating on the water surface and spread to the left and right, the buoyancy materials (200a, 200b) Bubble collecting device (100) comprising a guide for the guide vanes (202a, 202b) connected to one end of the) and a bubble collecting unit (204) provided in the central portion of the buoyancy material (200a, 200b) stretched left and right; A water collecting tank 110 for receiving and storing the foam liquid collected by the bubble collecting device 100; A sedimentation tank (120) having the sediment discharge pipe (320) for receiving the foam liquid from the bubble collecting device (100) and / or the water collecting tank (110) to precipitate sedimentable suspended solids in the foam liquid and discharging the precipitate; And a sand and aggregate layer in which plants such as reeds are planted, and a vent pipe 342 for delivering air to the bottom is provided to decompose and filter the foam liquid delivered from the sedimentation tank 120 by aerobic microorganisms. The foam liquid separated by the tank 340, the aerobic tank 340 and the waterproof layer 410, and composed of an aggregate layer and a sand layer is first decomposed and filtered in the aerobic tank 340 by anaerobic microorganisms. Provided is an industrial facility effluent treatment system comprising a reaction tank (130) comprising an anaerobic tank (350) for secondary decomposition and filtration.

In addition, the present invention, in the device for collecting and discharging the foam or oil floating on the water surface generated from the discharge water of the industrial facility, buoyancy materials (200a, 200b) floating on the water surface and spread to the left and right; Guide vanes 202a and 202b connected to one end of each of the buoyancy materials 200a and 200b; It is provided in the central portion of the buoyancy material (200a, 200b) unfolded to the left and right, one side is provided on the foam collecting plate 206 in contact with the water surface, and the upper portion of the foam collecting plate 206 to prevent the overflow of the foam or oil A bubble collecting part 204 including a bubble collecting wall 208 and a bubble discharge port 210 for discharging the bubble liquid or oil containing the bubble to the outside; A fixing chain 214 connected to the bubble collecting part 204; And a fixing block 212 connected to the fixing chain 214 and fixed to the bottom under the water surface.

In addition, the present invention, the bubble collecting device comprising a buoyancy material floating on the water surface and the guide guide for foam guide respectively connected to one end of the buoyancy material and a bubble collecting unit provided in the central portion of the buoyancy material, collected by the bubble collecting device Industrial facility effluent treatment system including a collecting tank for receiving and storing the foam liquid, a settling tank for precipitating the precipitated suspended solids in the foam liquid, and a reaction tank for decomposing and filtering the foam liquid into aerobic and anaerobic microorganisms A method of operation, the method comprising: (a) collecting the foam generated from the discharge water by using the foam collecting device; (b) delivering the foam liquid containing the bubbles collected by the bubble collecting device to the water collecting tank or the settling tank; (c) precipitating the suspended sediments contained in the foam liquid in the settling tank; (d) spraying the supernatant superseded in the settling tank to the top of the aerobic tank of the reactor and performing primary decomposition and filtration by aerobic microorganisms in the aerobic tank; And (e) discharging the foam liquid subjected to the first decomposition and filtration treatment in the aerobic tank after the second decomposition and filtration treatment in the anaerobic tank.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

1 is a block diagram of an industrial facility wastewater treatment system according to a preferred embodiment of the present invention.

Industrial wastewater treatment system according to a preferred embodiment of the present invention, the foam collecting device 100 for inducing and collecting the bubbles generated from the discharge water, the collecting tank 110 for storing the collected foam liquid, sediment inside the foam liquid Precipitation tank 120 to precipitate, and a reaction tank 130 to biologically decompose the foam liquid.

The foam collecting device 100 is installed in the extension of the outlet for cooling or circulating water discharged to the river, lake or sea used in industrial facilities. Bubble collecting device 100 is a device that is buoyant to the river, lake or the sea by the buoyancy material and guides the bubbles floating on the surface with a guide for guiding the bubble to the bubble collecting unit and then discharged to the outside.

The collecting tank 110 is a device for temporarily storing the foam liquid including the bubbles collected by the foam collecting device 100. The foam liquid collected in the foam collecting device 100 is delivered to the collection tank 110 by a pump and stored for processing. The sump tank 110 is configured to allow the installation of a distribution pipe for storing oxygen and removing oxygen and odors.

The settling tank 120 separates the sedimentable suspended solids in the foam liquid by the specific gravity difference so that the heavy ones are collected downward and the supernatant is overflowed to be transferred to the reaction tank. In addition, the lower part of the sedimentation tank 120 has a sediment outlet so that the sediment can be discharged to the outside.

The reactor 130 serves to decompose the foam liquid, including an oxidizing tank (aerobic tank) which is a biological treatment process performed in the presence of oxygen and an anaerobic tank which is a biological treatment process performed in the absence of oxygen.

Industrial wastewater treatment system according to a preferred embodiment of the present invention collects and stores the foam liquid and then precipitates the precipitate inside the foam liquid and biologically decomposes the foam liquid to treat the foam liquid of the industrial facility wastewater.

The bubble collecting device 100, the collecting tank 110, the settling tank 120 and the reaction tank 130 of the industrial facility discharge water treatment system according to a preferred embodiment of the present invention in more detail as follows.

2 is a perspective view of a bubble collecting device in the industrial facility wastewater treatment system according to a preferred embodiment of the present invention, Figure 2a is a foam fence in the bubble collection device of the industrial facility wastewater treatment system according to a preferred embodiment of the present invention Figure 2b is a perspective view of a buoyant material combined with, Figure 2b is a perspective view of a cylindrical buoyancy material in the bubble collection device of the industrial facility effluent treatment system according to a preferred embodiment of the present invention.

The bubble collecting device 100 includes buoyant materials 200a and 200b floating on the water surface, guide vanes 202a and 202b connected to one end of the buoyancy materials 200a and 200b, and buoyancy materials 200a and 200b, respectively. It comprises a bubble collecting portion 204 is coupled.

The buoyancy material (200a, 200b) is made of styrofoam or a plastic barrel formed an empty space therein, the specific gravity is significantly lower than the water so that the bubble collecting device 100 is floating on the water surface. The shape of the buoyancy material (200a, 200b) can be formed as shown in Figure 2a or 2b, Figure 2a is hollow on both the front or back or front and back of the plate-like foam fence 232 and foam fence 232 A foam fence integrated buoyancy member 230 having a buoyancy tube 234 attached thereto is illustrated, and FIG. 2B illustrates a cylindrical buoyancy member 240.

In the practice of the present invention, the buoyancy materials 200a and 200b may use the foam fence integrated buoyancy material 230 of FIG. 2A or the cylindrical buoyancy material 240 of FIG. 2B. The foam fence 232 of the foam fence integrated buoyancy material 230 may use a material such as a rubber plate, and the buoyancy cylinder 234 may be empty to allow the foam fence integrated buoyancy material 230 to float in water. On the other hand, the cylindrical buoyancy material 240 is formed so that the material, such as styrofoam in a cylindrical shape to float on the water itself and at the same time performs a function to prevent the bubbles overflow. In the case of the cylindrical buoyancy material 240, it is preferable to connect the outer peripheral surface thereof with a rope 242 of the net shape.

The guide blades 202a and 202b for inducing bubbles are respectively connected to one ends of the buoyancy materials 200a and 200b to induce bubbles generated in the discharged water to the inside. The bubbles generated in the discharge water flow down to the bubble collecting device 100 by the flow rate of the discharge water, and the guide blades 202a and 202b for guiding the bubbles effectively guide the bubbles to the inside of the bubble collecting device 100. Do it.

One end of the buoyancy material (200a, 200b) is connected, respectively, the bubble collecting unit 204 located in the central portion of the bubble collecting device 100 is provided on the bubble collecting plate 206 and the top of the bubble collecting plate 206 A foam collecting wall 208 and a foam outlet 210 for discharging the foam to the outside.

The bubble collecting plate 206 is capable of effectively collecting the induced bubbles, one end of which is attached to the bubble collecting part 204 and the other end of which is in contact with the water surface. In this case, the portion where the bubble collecting plate 206 is attached to the bubble collecting unit 204 is slightly higher than the surface of the water, and the portion where the bubble collecting plate 206 is in contact with the surface of the water is slightly submerged below the surface of the water. By doing this, when bubbles and water are introduced at the same time, it is possible to effectively capture only the bubbles floating on the water.

The bubble collecting wall 208 is provided on top of the bubble collecting plate 206 to prevent the collected bubbles from flowing out of the bubble collecting part 204. The bubble collecting wall 208 is preferably formed in a form in which the bottom surface is opened and the top and both sides are blocked, and both sides are provided with connecting plates connected to the buoyancy materials 200a and 200b. In addition, it is preferable that the bubble collecting wall 208 becomes narrower as it enters, so that the collected bubbles are effectively guided to the bubble outlet provided inside the center of the bubble collecting unit 204.

Meanwhile, in order to prevent the bubble collecting device 100 from flowing by the flow velocity, the bubble collecting unit 204 is preferably fixed. The fixing block 212 and the fixing block 212 fixed to the bottom under the sea surface are fixed. A fixing chain 214 connected to the foam collecting unit 204 is connected to fix the foam collecting device 100.

On the other hand, the foam collecting device 100 can effectively collect and discharge the foam liquid generated in the discharge water, in some cases, the spraying pipe 216 that can be sprayed with a defoaming agent for minimizing the generation of bubbles To be installed across the buoyancy material (200a, 200b). It is preferable to fix the apparatus support 218 for maintaining the mutual distance of the buoyancy materials 200a and 200b to both sides of the buoyancy materials 200a and 200b.

In addition, as a configuration for effectively collecting bubbles, it is preferable to include bubble inductors 220a and 220b. Bubble inductors (220a, 220b) is made of a kind of fan (Fan) shape, so that some of the submerged below the water surface to be rotated by the flow rate. The foam inductors 220a and 220b are preferably fixed to the device support 218, but are not necessarily limited thereto. The installation positions of the bubble inductors 220a and 220b are sufficient between the buoyancy materials 200a and 200b, and may be provided with a plurality of bubble inductors 220a and 220b as necessary.

The bubbles collected by the bubble collecting device 100 include water as well as bubbles, and the bubble liquid is discharged to the outside through the bubble outlet 210 of the bubble collecting unit 205. In order to discharge the foam liquid, the foam outlet 210 is connected to the outside by a pipe such as a hose (Hose) and the foam liquid is discharged by a predetermined pump (not shown).

The foam collecting device 100 is not only effective for collecting bubbles generated from the discharge water of an industrial facility, but also usefully in the case of collecting and discharging oil when oil is leaked to the sea. That is, when oil is leaked due to the sinking of the vessel on the sea surface, by placing the foam collecting device 100 according to the present invention on one side of the oil fence (Oil Fence) to prevent the diffusion of oil to effectively capture the oil floating on the water surface It is possible to discharge.

The foamed liquid discharged in this way is completely decomposed through the sump tank 110, the settling tank 120, and the reaction tank 130.

3 is a schematic diagram for treatment of foam liquid in an industrial facility wastewater treatment system according to a preferred embodiment of the present invention.

As described above, the bubble liquid collected by the bubble collecting device 100 is collected into the collecting tank 110 and then decomposed through the precipitation tank 120 and the reaction tank 130.

The collecting tank 110 performs a function of storing the foam liquid collected by the foam collecting device 100. In some cases, it is also possible to directly transfer the foamed liquid collected by the foam collecting device 100 to the settling tank 120. When the processing in the settling tank 120 is delayed, the foamed liquid is collected by the water collecting tank 110. It is preferable to be delivered to the settling tank 120 after.

The foam liquid collected by the foam collecting device 100 is transferred to the water collecting tank 110 through the foam liquid inlet pipe 302. The foam liquid retention pipe 302 is provided with a first valve 304 to open and close the supply of the foam liquid. On the other hand, the lower part of the sump tank 110 is provided with a sump discharge pipe 306 for discharging the foam liquid and the sump discharge pipe 306 is provided with a second valve 308 to supply the foam liquid collected in the sump tank 110 Open and close.

The sump discharge pipe 306 is connected to the sedimentation tank supply pipe 310, and the first pump 312 is provided to allow the foam liquid supplied from the sump discharge pipe 306 to be pumped through the sedimentation tank supply pipe 310. On the other hand, the central part of the sedimentation tank supply pipe 310 is provided with a collecting tank branch pipe 314 branched to the collecting tank 110 and the check valve 316 is provided at the lower end of the branch to prevent the back flow. In addition, a third valve 318 is provided at the upper end of the branch point of the sump branch pipe 314 so that the foam liquid pumped from the first pump 312 is supplied to the settling tank 120 or the sump tank (314) through the sump branch pipe 314. 110).

Meanwhile, in FIG. 3, the bubble liquid collected in the bubble collecting device 100 is supplied to the settling tank 120 after being collected in the water collecting tank 110, but in some cases, the bubble collected in the bubble collecting device 100. It is also possible for the liquid to be supplied directly to the settling tank 120.

In the settling tank 120, the sedimentable suspended solids are precipitated in the supplied foam liquid. The lower part of the sedimentation tank 120 is provided with a sediment discharge pipe 320 to discharge the sediment from time to time, the upper is provided with a supernatant discharge pipe 322 to supply the supernatant to the reaction tank.

The foamed liquid from which the precipitate is removed is supplied to the reaction tank 130 through the supernatant discharge pipe 322, and the foamed liquid may be supplied directly from the supernatant discharge pipe 322 to the reaction tank 130, but as shown in FIG. After being supplied to the storage unit 330, it is preferable to be supplied to the upper portion of the reactor 130 through the reactor supply pipe 334 by the second pump 322. At this time, the foam liquid supplied through the reaction tank supply pipe 334 is preferably distributed evenly on the upper portion of the reaction tank 130. The foam liquid is a reaction tank 130 by a hole such as a tray-type distribution pipe or pipe. Distribute it evenly over the top.

Reactor 130 is composed of aerobic tank 340, anaerobic tank 350 provided in the lower portion of the aerobic tank 340, when the installation space is sufficient, aerobic tank 340 and anaerobic tank 350 is mutually It can also be provided independently. In addition, the aerobic tank 340 is provided with a plurality of vent pipe 342 so that air can be supplied to the lower portion of the aerobic tank 340 through the vent pipe 342. On the other hand, the end portion of the anaerobic tank 350 is provided with a treated water discharge pipe 352 to process the foam liquid and to discharge the remaining water.

Referring to the configuration of the reactor 130 in more detail as follows.

Figure 4 is a detailed configuration of the reaction tank in the industrial facility wastewater treatment system according to a preferred embodiment of the present invention.

As described above, the reaction tank 130 includes an aerobic tank 340 and an anaerobic tank 350.

The aerobic tank 340 is maintained in the aerobic state by the supply of air through the vent pipe 342 and when salt is contained in the foam, such as when applied to seawater reeds, which can be vegetation even in the presence of salt Plants such as grass and seaweed are planted on the top to remove contaminants in the foam solution by the action of aerobic microorganisms. The anaerobic tank 350 is finally processed through the biological denitrification process in the state that the anaerobic foam solution first treated in the aerobic tank 340 is maintained.

The aerobic tank 340 is formed of a first unit 402 filled with sand from the top, a second unit 404 filled with aggregate, and a third unit layer filled with aggregate thicker than the aggregate of the second unit 404. 406, the lower portion of the vent pipe 342 is located in the third breathing layer (406). The lower part of the vent pipe 342 is provided with a hole pipe 408 so that the air supplied through the pipe pipe 342 is supplied to the third air layer 406 through the hole pipe 408 in which a plurality of pores are formed.

The aerobic tank 340 simultaneously performs biological oxidation and physical filtration to oxidize and decompose dissolved organic substances, and efficiently filter suspended organic solids, thereby purifying ammonia nitrogen and organic nitrogen compounds through biological nitrification. Convert to acidic nitrogen. In addition, the filtered suspended organic solids are oxidatively decomposed by microorganisms that inhabit the roots and aggregate surfaces of reeds.

Meanwhile, the phosphorus component in the foam liquid is removed by forming chemical precipitates with various cationic components (Ca ²⁺ , Mg ²⁺ , Fe ^3+, etc.) present in a large amount in the aggregate of the aerobic tank 340, and by reeds or plants Additionally removed.

The aerobic tank 340 is separated from the anaerobic tank 350 by the waterproof layer 410. The waterproof layer 410 does not completely separate the aerobic tank 340 and the anaerobic tank 350 but is made of the anaerobic tank 350. The first anaerobic unit 412 and the aerobic tank 340 are connected to each other so that the treated water treated in the aerobic tank 340 can be delivered to the first anaerobic unit 412.

Anaerobic tank 350 is the first anaerobic portion 412 made of aggregate, the second anaerobic portion 414 and the third anaerobic portion 416 made of sand, and the upper layer is made of sand and the lower layer is made of aggregate It includes four anaerobic portions 418.

The treated water supplied from the aerobic tank 340 passes through the first anaerobic unit 412, the second anaerobic unit 414, the third anaerobic unit 416, and the fourth anaerobic unit 418 sequentially. It is discharged to the outside through the discharge pipe 352.

The first anaerobic portion 412 of the anaerobic tank 350 maintains a part of the aerobic state, and plants are planted therein to further oxidize organic pollutants and maintain the anaerobic state. At 416 and the fourth anaerobic section 418, biological denitrification of nitrate nitrogen proceeds.

Separation of the first anaerobic unit 412, the second anaerobic unit 414, the third anaerobic unit 416, and the fourth anaerobic unit 418 of the anaerobic tank 350 may be performed as follows.

5 is a plan view of the anaerobic tank of the reaction tank in the industrial facility effluent treatment system according to a preferred embodiment of the present invention.

Anaerobic tank 350 is divided into a first rectifying plate 420, a second rectifying plate 422 and a third rectifying plate 424, the first rectifying plate 420 and the second rectifying plate 422 ) And the third rectifying plate 424 are each open so that the treated water can be sequentially delivered from the first anaerobic unit 412 to the fourth anaerobic unit 418 as shown in FIG. 5.

Referring to the treatment method using an industrial facility wastewater treatment system according to a preferred embodiment of the present invention as follows.

6 is a flowchart of a method for treating industrial facility wastewater according to a preferred embodiment of the present invention.

First, bubbles generated from the discharged water are collected using the bubble collecting device 100 (S600). Bubbles guided by the bubble guide vanes 202a and 202b are delivered to the bubble trap 204 and discharged to the outside through the bubble outlet 210.

The bubbles collected by the bubble collecting device 100 are delivered to the water collecting tank 110 in the form of a bubble solution containing water (S602). In some cases, the bubbles collected by the bubble collecting device 100 may be directly transmitted to the settling tank 120 instead of being transferred to the water collecting tank 110. However, in the case of using the sump tank 110, there is an advantage that can control the settling time in the settling tank 120.

In the settling tank 120 to precipitate the suspended sediment contained in the foam liquid, the precipitate is to be discharged out later (S604).

The supernatant in which the suspended sediment is precipitated in the settling tank 120 is delivered to the reaction tank 130, it is preferable to be sprayed on the upper portion of the aerobic tank 340 provided on the reaction tank 130 (S606). In the aerobic tank 340, plants such as reeds are planted, and because aerobic microorganisms are present, contaminants in the foam liquid are decomposed by a biochemical method.

In the aerobic tank 340, the first decomposed and filtered foam solution is subjected to secondary decomposition and filtration in the anaerobic tank 350 (S608). In the anaerobic tank 350, the foam liquid is finally decomposed biologically by using anaerobic microorganisms, and at the same time, the foam liquid is finally treated by filtration using aggregate and sand as a kind of filter agent and then discharged.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, it is possible to effectively collect the industrial facility discharge water by using the bubble collecting device, and to prevent the environmental pollution by decomposing the collected bubble liquid by using the microorganisms present in the natural state by the bubble treatment facility. Effective in In particular, according to the present invention, by effectively recovering the industrial facility wastewater and discharging it completely, it is possible not only to solve the harmful visual situation, but also to remove the problem of source that may cause problems such as eutrophication of the seawater. Effective for protection

On the other hand, the bubble collecting device according to the present invention can rise to the surface while maintaining a constant depth even when the external conditions change by its buoyancy, so the effect of collecting the bubbles without being greatly affected by the change in the external conditions have.

Claims (7)

In the system for collecting and processing the foam from the discharged water of an industrial facility, Buoyancy materials (200a, 200b) floating on the left and right to float on the water surface, the guide guide blades (202a, 202b) connected to one end of the buoyancy materials (200a, 200b), respectively, buoyancy materials (200a, 200b) Bubble collecting device 100 including a bubble collecting unit 204 is provided in the center of the; A water collecting tank 110 for receiving and storing the foam liquid collected by the bubble collecting device 100; A sedimentation tank (120) having the sediment discharge pipe (320) for receiving the foam liquid from the bubble collecting device (100) or the water collecting tank (110) to precipitate sedimentable suspended solids in the foam liquid and discharging the precipitate; And An aerobic tank is provided with sand and aggregate layers in which plants such as reeds are planted, and a vent pipe 342 for delivering air to the bottom is provided to decompose and filter the foam liquid delivered from the precipitation tank 120 by aerobic microorganisms. 340 and the foam liquid separated by the aerobic tank 340 and the waterproof layer 410 and composed of an aggregate layer and a sand layer are primarily decomposed and filtered in the aerobic tank 340 by anaerobic microorganisms. Reactor 130 including anaerobic tank 350 for decomposition and filtration Industrial facility effluent treatment system comprising a. The method of claim 1, The bubble collecting device 100 further includes a fixing chain 214 connected to the bubble collecting unit 204 and a fixing block 212 connected to the fixing chain 214 and fixed to the bottom under the water surface. Including, The bubble collecting unit 204 of the bubble collecting device 100, one side is attached to the bubble collecting unit 204, the other side of the bubble collecting plate 206 and the surface of the bubble collecting plate 206 And a foam collecting wall 208 provided at an upper portion to prevent the overflow of the foam, and a foam outlet 210 for discharging the foam liquid including the foam to the outside. . The method of claim 2, The bubble collecting device 100, And the spraying pipe 216 is installed between the buoyancy material (200a, 200b) so as to spray the defoaming agent to minimize the generation of the foam, Apparatus support 218 for maintaining the mutual distance of the buoyancy material (200a, 200b), and Bubble inductors 220a and 220b having a fan shape and part of which is submerged below the surface of the water to rotate by the flow rate so that the bubbles are effectively collected by the bubble collecting unit 204. Industrial facility effluent treatment system further comprising a. The method according to any one of claims 1 to 3, The aerobic tank 340 of the reactor 130, the first unit layer 402 filled with sand from the top, the second unit layer 404 filled with aggregate, and the aggregate of the second unit layer 404 And a third air gap layer 406 filled with coarse aggregate, and a lower portion of the vent pipe 342 is provided with an air hole pipe 408 having a plurality of voids to supply air supplied through the vent pipe 342. To be supplied to the third layer 406, The anaerobic tank 350 of the reactor 130, the first anaerobic portion 412 filled with aggregate, the second anaerobic portion 414 and the third anaerobic portion 416 filled with sand, and the upper layer with sand It comprises a fourth anaerobic portion 418 made of aggregate in the lower layer, the first anaerobic portion 412 and the second anaerobic portion 414 and the third anaerobic portion 416 and the fourth anaerobic portion 418 is an industrial facility effluent treatment system, characterized in that each side is divided into a first rectifying plate 420, a second rectifying plate 422 and a third rectifying plate 424. In the device for collecting and discharging foam or oil floating on the surface of the water discharged from industrial facilities, Buoyancy materials (200a, 200b) to be floating on the left and right floating on the water surface; Guide vanes 202a and 202b connected to one end of each of the buoyancy materials 200a and 200b; It is provided in the central portion of the buoyancy material (200a, 200b) unfolded to the left and right, one side is provided on the foam collecting plate 206 in contact with the water surface, and the upper portion of the foam collecting plate 206 to prevent the overflow of the foam or oil A bubble collecting part 204 including a bubble collecting wall 208 and a bubble discharge port 210 for discharging the bubble liquid or oil containing the bubble to the outside; A fixing chain 214 connected to the bubble collecting part 204; And A fixing block 212 connected to the fixing chain 214 and fixed to the floor below the water surface Bubble collecting device comprising a. The method of claim 5, And the spraying pipe 216 is installed between the buoyancy material (200a, 200b) so as to spray the defoaming agent to minimize the generation of the foam, Apparatus support 218 for maintaining the mutual distance of the buoyancy material (200a, 200b), and Bubble inductors 220a and 220b having a fan shape and part of which is submerged below the surface of the water to rotate by the flow rate so that the bubbles are effectively collected by the bubble collecting unit 204. Bubble collecting device, characterized in that it further comprises. Bubble collecting device comprising a buoyancy material floating on the water surface and a guide blade for inducing a bubble connected to one end of the buoyancy material, and a bubble collecting unit provided in the central portion of the buoyancy material, and receives and stores the foam liquid collected by the bubble collecting device In the operating method of the industrial facility effluent treatment system comprising a collecting tank, a settling tank for precipitating the precipitated suspended solids in the foam liquid, and an aerobic tank and anaerobic tank to decompose and filter the foam liquid into aerobic and anaerobic microorganisms, (a) collecting the bubbles generated from the discharge water by using the bubble collecting device; (b) delivering the foam liquid containing the bubbles collected by the bubble collecting device to the water collecting tank or the settling tank; (c) precipitating the suspended sediments contained in the foam liquid in the settling tank; (d) spraying the supernatant superseded in the settling tank to the top of the aerobic tank of the reactor and performing primary decomposition and filtration by aerobic microorganisms in the aerobic tank; And (e) discharging the foamed liquid subjected to the first decomposition and filtration in the aerobic tank after secondary decomposition and filtration in the anaerobic tank Industrial facility effluent treatment method comprising a.

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