KR101961671B1 - Apparatus of livestock wastewater treatment and method of operating the same - Google Patents

Abstract

An apparatus for treating animal wastewater and an operation method thereof are provided. According to the present invention, there is provided a livestock wastewater treatment apparatus and a method of operating the same, comprising a bubble generator, a catalytic reactor, a storage tank, It is possible to provide a livestock wastewater treatment apparatus and an operation method thereof that can use a catalyst bed having a long life by injecting wastewater into a catalyst bed and have high effluent treatment efficiency.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for treating livestock wastewater,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for treating livestock wastewater and, more particularly, to a livestock wastewater treatment apparatus for removing nitrogen and phosphorus contained in livestock wastewater by passing livestock wastewater through micro- And a method of operating the same.

With the increasing concern for environmentally friendly alternative energy due to the exhaustion of fossil energy sources and the global warming, microbial fuel cells that use wastewater treatment and energy generation simultaneously using microorganisms as catalysts have attracted attention.

Among them, livestock wastewater containing a large amount of organic pollutants is emerging as an energy source for microbial fuel cells.

However, livestock wastewater contains high concentrations of nitrogen compounds as well as organic substances. Nitrogen compounds such as ammonia nitrogen (NH3) and nitrate nitrogen contained in livestock wastewater act as electron acceptors or act as inhibitors in the cathode section of a microbial fuel cell, thereby reducing current generation. Therefore, most of the livestock wastewater is currently used only as compost or liquid fertilizer.

Therefore, in order to apply livestock wastewater as an energy source for a microbial fuel cell, a pretreatment system for removing nitrogen compounds which is a cause of inhibiting current generation is needed.

In the Korean Patent No. 10-1570796 filed by the present applicant (entitled "Nitrogen Treatment System in Wastewater"), an upper layer tank located above the catalyst layer, a lower layer tank below the catalyst layer, And a second porous plate provided between the catalyst layer and the upper layer tank, a waste water circulation pipe having an inlet located inside the upper tank and an outlet including a nozzle for generating microbubbles, A pump for circulating the wastewater stored in the upper layer tank to the lower layer through the circulation pipe, and an oxidant injection device for injecting oxidant into the circulation pipe at a predetermined injection rate, the microbubbled livestock wastewater is passed through the catalyst layer The wastewater quality that treats nitrogen in livestock wastewater by repeating the process A small processing system is disclosed.

However, in the above-mentioned wastewater treatment system, impurities are formed on the surface of the catalyst layer by passing the livestock wastewater in a state in which the foreign matter is not completely removed to the catalyst layer to reduce the lifetime of the catalyst layer and the nitrogen removal efficiency in the livestock wastewater. A problem has occurred.

Korean Patent No. 10-1570796

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a low-cost livestock wastewater treatment apparatus and an operation method thereof.

Another object of the present invention is to provide a highly reliable livestock wastewater treatment apparatus and an operation method thereof.

Another object of the present invention is to provide a livestock wastewater treatment apparatus and a method of operation thereof.

It is another object of the present invention to provide a highly efficient livestock wastewater treatment apparatus and an operation method thereof.

In order to solve the above technical problems, the present invention provides an apparatus for treating animal wastewater.

According to one embodiment, the livestock wastewater treatment apparatus removes nitrogen oxide and phosphorus (P) components present in livestock wastewater. The livestock wastewater treatment apparatus includes a bubble generator, a catalytic reactor, a reservoir, a dirt removal channel, and a catalyst circulation channel. The bubble generator bubbles the livestock wastewater introduced from the outside by the wastewater inlet by the oxidant inlet, the pump and the perforated plate. The catalytic reactor includes a catalytic layer for causing a catalytic reaction with the livestock wastewater. The storage tank temporarily stores the livestock wastewater treated from the bubble generator and the catalytic reactor. The foreign matter removing passage connects the bubble generator and the storage tank to provide a circulating flow path for circulating the bubbled livestock wastewater. The catalytic circulation flow path connects the storage tank, the bubble generator, and the catalytic reactor to provide a circulation flow path for circulating the livestock wastewater from which foreign matter has been removed.

According to one embodiment, the catalytic reactor of the livestock wastewater treatment apparatus may include a baffle for constantly maintaining the hydraulic speed of the livestock wastewater accelerated from the bubble generator.

 According to one embodiment, the livestock wastewater from the livestock wastewater treatment apparatus can repeatedly circulate the foreign object removal flow path through the catalyst circulation flow path after repeatedly circulating the foreign object removal flow path for a predetermined period of time.

According to one embodiment, the livestock wastewater of the livestock wastewater treatment apparatus can be circulated repeatedly for more than 2 hours.

According to one embodiment, the foreign matter removing passage of the livestock wastewater treatment apparatus may provide a circulation passage including a first foreign matter removing passage and a second foreign substance removing passage. The first foreign material removing passage may have one end connected to the lower side of the bubble generator and the other end connected to the lower side of the storage tank. One end of the second foreign material removing passage may be connected to the upper surface of the reservoir and the other end may be connected to the upper surface of the bubble generator.

According to one embodiment, the catalytic circulation flow path of the livestock wastewater treatment apparatus may provide a circulation path including a first catalytic circulation passage, a second catalytic circulation passage, and a third catalytic circulation passage. The first catalyst circulation passage may have one end connected to the upper surface of the reservoir and the other end connected to the upper surface of the bubble generator. The second catalyst circulation passage may have one end connected to the lower surface of the bubble generator and the other end connected to the lower surface of the catalytic reactor. The third catalyst circulation passage may have one end connected to the upper surface of the catalytic reactor and the other end connected to the upper surface of the storage tank.

According to an embodiment of the present invention, the livestock wastewater treatment apparatus may share one flow channel in the sections where the path of the foreign matter removal flow path and the catalyst circulation flow path overlap.

According to one embodiment, the livestock wastewater treatment apparatus may further include a valve unit for controlling the flow of the livestock wastewater in the section using the shared channel.

According to one embodiment, the storage tank and the catalytic reactor of the livestock wastewater treatment apparatus may include cylindrical first and second debris removal pipes formed by protruding from the upper surface by a predetermined distance, respectively.

According to one embodiment, the catalyst layer of the livestock wastewater treatment apparatus may include a catalyst in which at least one of a transition metal, an alkali metal, and an alkaline earth metal is supported on an oxide carrier.

According to an embodiment of the present invention, when the catalyst of the livestock wastewater treatment apparatus has a transition metal supported on an oxide support, the oxide support may be magnesium oxide (MgO), and the transition metal may be iron (Fe).

In order to solve the above technical problems, the present invention provides a method for operating an animal wastewater treatment apparatus.

According to an embodiment of the present invention, an operation method of the livestock wastewater treatment apparatus includes the steps of injecting livestock wastewater into a bubble generator, circulating the livestock wastewater along a dewatering flow path to remove foreign matter from the livestock wastewater through bubbling, And performing a catalytic reaction process for removing nitrogen oxide and phosphorus (P) in the livestock wastewater by circulating the livestock wastewater from which foreign matters have been removed by the foreign matter removal process along the catalytic circulation channel.

According to an embodiment of the present invention, the foreign matter removing passage may provide a circulation passage including a first foreign substance removing passage and a second foreign substance removing passage. The first foreign material removing passage may have one end connected to the lower side of the bubble generator and the other end connected to the lower side of the storage tank. One end of the second foreign material removing passage may be connected to the upper surface of the reservoir and the other end may be connected to the upper surface of the bubble generator.

According to an embodiment of the present invention, the catalytic circulation flow path may provide a circulation path including the first catalytic circulation passage, the second catalytic circulation passage, and the third catalytic circulation passage. . The first catalyst circulation passage may have one end connected to the upper surface of the reservoir and the other end connected to the upper surface of the bubble generator. The second catalyst circulation passage may have one end connected to the lower surface of the bubble generator and the other end connected to the lower surface of the catalytic reactor. The third catalyst circulation passage may have one end connected to the upper surface of the catalytic reactor and the other end connected to the upper surface of the storage tank.

According to an embodiment of the present invention, in the method of operating the livestock wastewater treatment apparatus, the step of removing the foreign matter may include the steps of delivering the livestock wastewater bubbled by the bubble generator to the lower portion of the storage tank along the first foreign matters removing passage, A step of lifting foreign substances in the livestock wastewater in the form of bubbles introduced into the lower part of the storage tank to the upper part of the storage tank and delivering the livestock wastewater in the form of bubbles with reduced foreign matter to the bubble generator Repeat can be done.

According to one embodiment, the catalytic reaction process of the livestock wastewater treatment apparatus may further include the step of transferring the bovine livestock wastewater from which the foreign substance is removed from the upper part of the storage tank to the bubble generator Introducing livestock wastewater re-bubbled from the bubble generator into the catalytic reactor along the second catalytic circulation passage; passing the livestock wastewater from the catalytic reactor through the catalyst bed Causing a catalytic reaction and along the third catalytic cycle interval channel. And the step of introducing the livestock wastewater having the reduced concentration of nitrogen oxide and phosphorus (P) into the upper part of the storage tank from the upper part of the catalytic reactor by the catalytic reaction can be repeatedly performed.

The apparatus and method for operating an animal wastewater according to an embodiment of the present invention can use a long-life catalyst by performing a catalyst removal process after removing a foreign substance.

Also, in the apparatus and method for operating an animal wastewater according to an embodiment of the present invention, the lifetime of the catalyst is extended by performing the catalyst removal process after removing the foreign substance, thereby reducing the maintenance cost.

In addition, the apparatus and method for operating an animal wastewater according to an embodiment of the present invention can perform high efficiency wastewater treatment by performing nitrogen removal in the livestock wastewater in two steps.

In addition, the apparatus for livestock wastewater treatment according to the embodiment of the present invention and the operation method thereof can remove the phosphorus in the livestock wastewater, thereby enabling highly efficient wastewater treatment.

Further, in the livestock wastewater treatment apparatus and the treatment method thereof according to the embodiment of the present invention, the effective reaction area of livestock wastewater in the form of bubbles is widened by using a baffle, and the contact time is increased, have.

1 is a perspective view for explaining an livestock wastewater treatment apparatus according to an embodiment of the present invention.
2 is a cross-sectional view for explaining an livestock wastewater treatment apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention.
4 is a flow chart for explaining a step of removing a foreign substance in an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention.
FIG. 5 is a flow chart for explaining a deodorization process of an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention.
6 is a flow chart for explaining the catalytic reaction process of the operation method of the livestock wastewater treatment apparatus according to the embodiment of the present invention.
7 is a flowchart for explaining a catalytic reaction process in an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention.
FIG. 8 is a graph showing the concentration and removal efficiency of nitrogen oxide versus the number of times of use of the catalyst in the wastewater treatment system according to the experimental example of the present invention and the nitrification system in the wastewater according to the comparative example.
FIG. 9 is a graph showing the removal efficiency of organic pollutants over time according to the total chemical oxygen demand (TCOD) of the livestock wastewater treatment apparatus according to the experimental example of the present invention.
10 is a graph showing removal efficiencies of organic pollutants by time according to solubility chemical oxygen demand (SCOD) of the livestock wastewater treatment apparatus according to the experimental example of the present invention.
11 is a graph showing concentration and removal efficiency of nitrogen oxides (ammonia oxides) per hour in the livestock wastewater treatment apparatus according to the experimental example of the present invention.
12 is a graph showing concentration and removal efficiency of phosphorus (P) per hour in the livestock wastewater treatment apparatus according to the experimental example of the present invention.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures may be exaggerated to illustrate the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprising" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof. In addition, A and B are 'connected' and 'coupled', meaning that A and B are directly connected or combined, and other component C is included between A and B, and A and B are connected or combined .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 and FIG. 2 are views for explaining an livestock wastewater treatment apparatus according to an embodiment of the present invention. More specifically, Fig. 1 is a perspective view of the livestock wastewater treatment apparatus, and Fig. 2 is a cross-sectional view of the livestock wastewater treatment apparatus.

1 and 2, the livestock wastewater treatment apparatus includes a bubble generator 100, a catalytic reactor 200, a reservoir 300, a foreign matter removing passage 400, a catalytic circulation passage 500, ). The bubble generator 100 may be a device for bubbling livestock wastewater introduced from the outside.

More specifically, the bubble generator 100 may include a wastewater inlet 110, an oxidant inlet 130, a pump 150, and a perforated plate 170.

The waste water inlet 110 may protrude from one side of the bubble generator 100. The wastewater inlet 110 may deliver external livestock wastewater into the bubble generator 100.

The oxidant inlet 130 may introduce an external oxidant into the bubble generator 100. The oxidant inlet 130 may provide an oxidant in liquid or gaseous form within the bubble generator 100. For example, the oxidant may be oxygen (O ₂ ) or ozone (O ₃ ) in gaseous form and may be hydrogen peroxide (H ₂ O ₂ ) in liquid form.

The oxidant introduced through the oxidant inlet 130 may be dissolved in the high-pressure wastewater by the pump 150 to form bubbles. According to the embodiment, when the ozone (O ₃ ) gas introduced from the outside by the oxidant inlet 130 is dissolved in the livestock wastewater under a high pressure, OH-radicals can be generated.

OH-Radical is an anion-based substance with strong sterilizing power and can decompose nitrogen in animal wastewater by oxidation. Thus, nitrogen in the livestock wastewater can be primarily removed.

The oxidant inlet 130 may include a regulating valve 135 at one end to control the flow rate of the oxidant. For example, the oxidant may be supplied at a flow rate of 300 mL / min.

The pump 150 can control the flow of livestock wastewater flowing through the wastewater inlet 110. In other words, the livestock wastewater can be moved by the pump 150 in one direction along the dirt removal flow path 400 to be described later. For example, the pump 150 may use at least one power engine such as an electric motor or an internal combustion engine.

The pump 150 may provide an environment of high pressure to the livestock wastewater, as described above, to help the oxidant melt in the livestock wastewater to form bubbles.

The perforated plate 170 may be a plate-like shaped article formed by perforating fine holes. For example, the perforated plate 170 may be made of resin or metal.

The perforated plate 170 can reduce the size of the livestock wastewater that has passed through the oxidant inlet 130 and the pump 150 along the foreign matter removing passage. In other words, the perforated plate 170 is formed by the oxidant inlet 130 and the pump 150, and the size of the accelerated livestock wastewater can be miniaturized. According to the embodiment, the particle size of the livestock wastewater that has passed through the perforated plate 170 may be 50 μm or less. In other words, the perforated plate 170 can deform the livestock wastewater into micro bubbles. Accordingly, the flow rate of the livestock wastewater accelerated by the pump 150 can be reduced. Thereafter, the low-speed livestock wastewater in the form of micro bubbles may be introduced into the storage tank 300, which will be described later.

The catalytic reactor 200 can receive the microbubble-form livestock wastewater through which the foreign substance is removed through the bubble generator 100 through the storage tank 300, which will be described later.

The catalytic reactor 200 can oxidize nitrogen oxides and phosphorus (P) in the microbubble-type livestock wastewater from which foreign matter has been removed. For example, the nitrogen oxide may be an ammonia oxide.

The catalytic reactor 200 may include a baffle 230, a catalyst layer 250, and a first foreign matter removal pipe 270. The baffle 230 may lower the flow rate of the microbubble-type livestock wastewater from which the foreign material provided from the bubble generator 100 is removed. Accordingly, the flow velocity of the livestock wastewater accelerated by the pump 150 in the bubble generator 100 can be maintained at a constant speed.

In addition, the baffle 230 can evenly disperse the microbubble-form livestock wastewater. Accordingly, when the microbubble-type livestock wastewater that has passed through the baffle 230 flows into the catalyst layer 250 to be described later, the catalytic reaction efficiency can be improved due to an increase in the contact area.

The number of the baffles 230 may be at least one, and the number of the baffles 230 may be adjusted according to the flow rate of the bubbles generator 100 and the pump 150.

The catalyst layer 250 may include a catalyst in which at least one of a transition metal, an alkali metal, and an alkaline earth metal is supported on an oxide support. For example, the catalyst layer 250 may include a catalyst in which a transition metal is supported on an oxide support. According to an embodiment, the oxide carrier may be magnesium oxide (MgO), and the transition metal may be trivalent iron (Fe ^{3 +} ). Also, the catalyst of the catalyst layer 250 may be filled with 300 g / L.

The catalyst layer 250 may react the microbubble-type livestock wastewater that has passed through the baffle 230 with the catalyst. More specifically, when the oxide carrier of the catalyst reacts with the microbubble-type livestock wastewater containing the oxidizing agent, a large amount of OH-radicals can be formed. As described above, the OH-radical (Radical) is an oxygen anion-based substance having high sterilizing power, and can decompose nitrogen by oxidizing nitrogen in the livestock wastewater. At this time, the amount of OH-radicals generated in the catalyst layer 250 may be larger than the amount of OH-radicals generated in the bubble generator 100. Thus, nitrogen oxides in the microbubble-form livestock wastewater can be removed secondarily.

In addition, the transition metal of the catalyst may react with livestock wastewater. Accordingly, phosphorus (P) in the livestock wastewater can be precipitated and removed.

The first foreign matter removing pipe 270 may protrude from the side surface of the catalytic reactor 200 by a predetermined distance. The first foreign matter removing pipe 270 may discharge a minute amount of foreign matter having passed through the catalyst layer 250 to the outside of the catalytic reactor 200.

The storage tank 300 includes a second debris removal pipe 350 and may temporarily store the microbubble-type livestock wastewater treated from the bubble generator 100 and the catalytic reactor 200.

According to one embodiment, the storage tank 300 can receive microbubbed livestock wastewater from the bubble generator 100 through the foreign matter removing passage 400 to be described later. More specifically, one end of the foreign matter removing passage 400 may be connected to a lower side of the bubble generator 100, and the other end may be connected to a lower side of the storage tank 300. Accordingly, the microbubble-type livestock wastewater transferred from the bubble generator 100 may be introduced into the lower end of the storage tank 300.

The microbubble-type livestock wastewater flowing into the lower end of the storage tank 300 may flow upward to the upper end of the storage tank 300. In other words, the livestock wastewater in the form of micro bubbles can float inside the storage tank 300.

In the microbubble-type livestock wastewater, foreign matter from livestock manure may exist. Such foreign matter can be located in the upper layer as the microbubble-type livestock wastewater floats up. For example, the foreign matter may be located between the point A and the point A 'of the reservoir 300. The foreign matter may be discharged to the outside through the second foreign matter removing pipe 350 protruding from the storage tank 300 by a predetermined distance. The second foreign matter removing pipe 350 may also be located between the A point and the A 'point of the reservoir 300. In other words, the microbubble-type livestock wastewater located at the point A from the lower end of the storage tank 300 can be reduced in foreign matter to the initial inflow amount. Accordingly, the livestock wastewater treatment apparatus according to the embodiment of the present invention repeatedly circulates the microbubble-type livestock wastewater into the bubble generator 100 and the storage tank 300 through the foreign matter removing passage 400, Foreign matter in the wastewater can be removed.

According to another embodiment, the storage tank 300 can receive the microbubble-type livestock wastewater having undergone the catalytic reaction from the catalytic reactor 200 through the catalyst circulation channel 500 to be described later. More specifically, the catalytic circulation passage 500 may have one end connected to the catalytic reactor 200 and the other end connected to the upper surface of the storage tank 300. Accordingly, the microbubble-type livestock wastewater having nitrogen oxide and phosphorus (P) reduced by the catalytic reaction in the catalytic reactor (200) can be temporarily stored in the storage tank (300). The livestock wastewater treatment apparatus according to the embodiment of the present invention repeatedly circulates the microbubble-type livestock wastewater having the foreign substance removed through the catalyst circulation channel 500 into the catalytic reactor 200 and the storage tank 300, It is possible to effectively remove nitrogen oxides and phosphorus (P) in the livestock wastewater by increasing the number of catalytic reactions.

The foreign matter removing passage 400 is a flow path through which microbubbed livestock wastewater flows and can be provided in the form of a cylindrical pipe.

The foreign matter removing passage 400 may be a circulating flow passage for circulating microbubbed livestock wastewater by connecting the bubble generator 100 and the storage tank 300.

More specifically, the foreign matter removing passage 400 may include a first foreign substance removing passage 430 and a second foreign substance removing passage 450. One end of the first foreign material removing passage 430 may be connected to a lower surface of the bubble generator 100 and the other end may be a flow path connected to a lower surface of the storage tank 300. In other words, the first foreign material removing passage 430 may be provided as a passage for transferring the livestock wastewater microbubbed by the bubble generator 100 to the storage tank 300, as described above .

The second foreign matter removing passage 450 may have one end connected to the upper surface of the storage tank 300 and the other end connected to the upper surface of the bubble generator 100. In the case of one end of the second foreign material removing passage 450, it may be located between points A and B inside the storage tank 300. In the area between the point A and the point B of the storage tank 300, the livestock wastewater which is floated from the lower part of the storage tank 300 and whose foreign matter is reduced can be positioned as described above. Accordingly, the microbubble-type livestock wastewater, which is located between the points A and B in the storage tank 300, is discharged to the inside of the bubble generator 100 along the second foreign- As shown in FIG.

Therefore, the microbubble-type livestock wastewater can circulate the foreign matter removing passage 400 repeatedly, thereby removing foreign matter from the animal manure in the livestock wastewater. According to the embodiment, the microbubble-type livestock wastewater can be repeatedly circulated in the foreign matter removing passage 400 for 2 hours or more. Thereafter, the microbubble-type livestock wastewater from which the foreign substance is removed can be temporarily stored in the storage tank 300.

The catalytic circulation flow path 500 is a flow path through which microbubbles of livestock wastewater having foreign substances are removed and can be provided in the form of a cylindrical pipe like the foreign matter removing flow path 400.

The catalytic circulation flow path 500 may be a circulation flow path connecting the storage tank 300, the bubble generator 100, and the catalytic reactor 200 to circulate the microbubble-type livestock wastewater from which the foreign substance is removed.

More specifically, the catalyst circulation passage 500 may include a first catalyst circulation passage 530, a second catalyst circulation passage 550, and a third catalyst circulation passage 570. The first catalytic converter passage 530 may have one end connected to the upper surface of the storage tank 300 and the other end connected to the upper surface of the bubble generator 100. In other words, as described above, the first catalytic converter passage 530 is a passage for delivering the microbubble-type livestock wastewater, which is debris-removed in the storage tank 300, to the bubble generator 100 Can be provided. The livestock wastewater having a micro bubble shape can be reintroduced into the bubble generator 100 to reduce the flow rate before flowing into the catalytic reactor 200 by the second catalytic circulation passage 550 to be described later.

The second catalytic converter passage 550 may have a first end connected to the lower surface of the bubble generator 100 and a second end connected to the lower surface of the catalytic reactor 200. As described above, the second catalytic converter passage 550 can pass the bubble-shaped livestock wastewater, which has passed through the bubble generator 100 to remove foreign matter, to the catalytic reactor 200.

The flow rate of the microbubble-type livestock wastewater accelerated by the pump 150 in the bubble generator 100 can be maintained at a constant speed while passing through the baffle 230. Accordingly, when the microbubble-type livestock wastewater from which the foreign matter is removed passes through the catalyst layer 250, it can be floated at a constant speed. Therefore, the baffle 230 prevents the catalytic reaction time between the catalyst and the livestock wastewater from being shortened by the pump 150, so that a highly efficient oxidation reaction between nitrogen oxides and phosphorus (P) can occur .

The third catalyst circulation passage 570 may have one end connected to the upper surface of the catalytic reactor 200 and the other end connected to the upper surface of the storage tank 300. The third catalytic circulation passage 570 is connected to the catalytic converter 200 through the catalytic layer 250 to generate microbubbles in the form of microbubbles in which nitrogen oxides and phosphorus ).

Therefore, the microbubble-type livestock wastewater from which foreign matter has been removed can be repeatedly circulated in the catalytic circulation passage 500 to remove nitrogen oxide and phosphorus (P) in the livestock wastewater. Thereafter, the microbubble-type livestock wastewater from which nitrogen oxide and phosphorus (P) have been removed is temporarily stored in the storage tank 300 and can be used as an energy source for the microbial fuel device.

In the case where the path of the foreign matter removing path 400 and the path of the catalyst circulating path 500 are overlapped, one sectional flow path can be shared. According to the embodiment, the path of the second foreign matter removing passage 450 and the passage of the first catalytic converter passage 530 may be the same. In addition, the second foreign matter removing passage 450 and the first catalyst circulation passage 530 and the third catalyst circulation passage 570 may overlap with each other. In this case, the additional configuration can be reduced by unifying the conflicting sectional flow paths with one common flow path. By connecting the valve unit 600, which will be described later, to the shared flow channel, it is possible to control the flow of the microbubble-type livestock wastewater according to the process order.

The valve unit 600 can sequentially control the flow of the livestock wastewater in the form of micro bubbles, as described above. The valve unit 600 may be at least one of a T-shaped valve, a C-shaped valve, and a single valve.

The livestock wastewater treatment apparatus according to the embodiment of the present invention has been described above.

In the case of the conventional apparatus for treating nitrogen in the wastewater, the microbubble device, the reaction tank, and the catalyst layer are integrated so that the microbubble-form livestock wastewater from which the foreign substance is not removed flows into the catalyst layer. As a result, impurities (scales) are formed on the surface of the catalyst layer, so that the lifetime of the catalyst layer is lowered and the nitrogen treating function in the wastewater is lowered.

Therefore, in the livestock wastewater treatment apparatus according to the embodiment of the present invention, by including the bubble generator, the storage tank and the catalytic reactor, the dirt removal channel and the catalyst circulation channel, the livestock wastewater, , And as a result, nitrogen oxide and phosphorus (P) in effluent water are effectively removed.

Hereinafter, an operation method of the livestock wastewater treatment apparatus will be described in detail.

3 is a flowchart illustrating an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention.

1 to 3, livestock wastewater can be injected into the bubble generator 100 through the wastewater inlet 110 (S100). The livestock wastewater injected into the bubble generator 100 may be circulated along the foreign matter removing passage 400 connected to the bubble generator 100 to form a micro bubble S200 ). The foreign matter removed by the animal manure in the livestock wastewater can be removed by the foreign matter removing process.

FIGS. 4 to 5 are views for explaining a debris removal process of an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention. More specifically, FIG. 4 is a flow chart for explaining a method of operating the foreign matter removing process of the livestock wastewater treatment apparatus, and FIG. 5 is a flowchart for explaining a method of operating the foreign matter removal process of the livestock wastewater treatment apparatus.

Referring to FIGS. 1 to 5, the livestock wastewater transferred from the wastewater inlet 110 may be deformed into micro bubbles by the bubble generator 100 during the removal process. The microbubbed livestock wastewater may be delivered (F _x1 ) to the lower portion of the storage tank 300 along the first foreign material removing passage 430 connected to the bubble generator 100 at step S210.

The microbubble-type livestock wastewater flowing into the lower part of the storage tank 300 may float (F _x2 ) to the upper part of the storage tank 300. At this time, the foreign matter in the livestock wastewater may be placed in a layered form between points A and A '(S220).

The microbubble-type livestock wastewater, which is located at a point B from point A of the storage tank 300 in which the foreign substances are separated in a layered manner and the foreign matter is relatively reduced, flows along the second foreign- (F _x3 ) to the inlet port 100 (S230).

The microbubble-type livestock wastewater can be repeatedly performed in steps S210, S220, and S230 until the foreign matter is removed or the foreign matter removal process is performed for 2 hours or more (S240).

After the removal of the foreign matter, the microbubble-type livestock wastewater from which the foreign substance is removed may be temporarily stored in the storage tank 300.

3, the microbubble-type livestock wastewater temporarily stored in the storage tank 300 after the foreign object removing process is completed is circulated along the catalytic circulation channel 500, (S300). The nitrogen oxide and phosphorus (P) in the livestock wastewater can be removed by the catalytic reaction process.

6 and 7 are views for explaining a catalytic reaction process in an operation method of an animal wastewater treatment apparatus according to an embodiment of the present invention. More specifically, FIG. 6 is a flow chart for explaining a method of operating the catalytic reaction process of the livestock wastewater treatment apparatus, and FIG. 7 is a flowchart for explaining a method of operating the catalytic reaction process of the livestock wastewater treatment apparatus.

Referring to FIGS. 1 to 3 and 6 to 7, when the catalytic reaction process is performed, the microbubble-type livestock wastewater from which the foreign substance is removed by the foreign substance removing process is removed from the A point of the storage tank 300 B < / RTI >

Livestock waste of the micro-bubble form is located between point B from point A of the reservoir 300 may be, the bubble generator to (F _y1) pass 100 along the first catalytic cycle period flow path 530 (S310). The microbubble-type livestock wastewater may pass through the bubble generator 100, and the flow velocity accelerated by the pump 150 may be lowered.

The re-bubbled livestock wastewater from the bubble generator 100 may be introduced (F _y2 ) into the catalytic reactor 200 along the second catalytic circulation passage 550 at step S320.

The microbubble-type livestock wastewater from which the foreign substance is removed may pass through the catalytic reactor 200 (F _y3 ) (S330). More specifically, the microbubble-type livestock wastewater whose flow rate is increased by the pump 150 is circulated through the bubble generator 100 by the foreign substance removal process, And can pass through the baffle 230. The livestock wastewater that has passed through the baffle 230 may flow into the catalyst layer 250 at a constant speed before the speed of the livestock wastewater is reduced by the pump 150.

The floating microbubble-type livestock wastewater can pass through the catalyst layer 250. At this time, the microbubble-type livestock wastewater is provided in a state in which the foreign substances are removed, so that it can pass through the catalyst layer 250 without forming a separate impurity on the surface of the catalyst layer 250. The concentration of nitrogen oxides and phosphorus (P) in the livestock wastewater can be reduced through the catalytic reaction in the catalyst layer 250 of the livestock wastewater.

Through the catalytic reactor 200, nitrogen oxides, and phosphorus (P), a livestock waste water This reduction may be introduced into (F _y4) to the storage tank 300, the top along the third catalytic cycle period flow path (570) (S340 ). Thereafter, the microbubble-type livestock wastewater can repeatedly perform the above steps (S310, S320, S330, S340) until the nitrogen oxide and phosphorus (P) are removed.

 After the catalytic reaction process is completed, the microbubble-type livestock wastewater having nitrogen oxide and phosphorus (P) removed can be temporarily stored in the storage tank 300.

The operation method of the livestock wastewater treatment apparatus according to the embodiment of the present invention has been described above.

Hereinafter, results of evaluation of wastewater treatment characteristics of the livestock wastewater treatment apparatus according to the experimental example of the present invention and the nitrogen treatment system in the wastewater according to the comparative example will be described below.

Evaluation of Wastewater Treatment Characteristics of Livestock Wastewater Treatment Apparatus According to Experimental Example of the Present Invention

The wastewater treatment characteristics of the livestock wastewater treatment apparatus according to the experimental example of the present invention were evaluated.

A catalyst layer of 300 g / L of Fe / MgO catalyst was applied.

In addition, livestock wastewater having a content of 733.3 ± 47.1 mg / L by the animal manure and 420 mg / L of nitrogen oxide was introduced into the bubble generator 100.

Then, the foreign material removal process and the catalytic reaction process were performed for 2 hours each.

Evaluation of Wastewater Treatment Characteristics of Nitrogen Treatment System in Wastewater According to Comparative Example of the Present Invention

As a comparative example of the present invention, the wastewater treatment characteristic evaluation of the nitrogen treatment system (Korean Patent No. 10-1570796) in the waste water intended to be output by the present applicant was carried out.

A catalyst layer of 300 g / L of Fe / MgO catalyst was applied.

Then, the livestock wastewater having the foreign matter of 760.0 ± 0.0 mg / L was introduced into the integrated nitrogen treatment system of the wastewater, and the circulation process was carried out for 2 hours.

Table 1 below is a table showing the foreign matter removal efficiency of livestock manure in livestock wastewater according to the experimental and comparative examples of the present invention.

In livestock wastewater
Initial amount of foreign matter After the foreign material removal process (2h), the amount of foreign matter (A) After completion of the operation of the wastewater treatment device
The amount of foreign substances (B) Of wastewater treatment equipment
After completing the operation
Foreign matter removal efficiency (A + B) Experimental Example 733.3 ± 47.1 mg / L 100.0 0.0 mg / L 105.0 + - 21.2 mg / L (2h) 85.7% (4h) Comparative Example 760.0 0.0 mg / L - 110 ± 28.3 mg / L (2h) 85.5% (2h)

Removal efficiency of livestock manure by livestock removal process in livestock wastewater

Referring to Table 1, the amount of foreign matter in the livestock wastewater treated by the livestock wastewater treatment apparatus according to the experimental example of the present invention was 100.0 ± 0.0 at the initial stage of 733.3 ± 47.1 mg / mg / L. < / RTI >

After the livestock wastewater whose amount of foreign matter has been reduced through the above-described foreign matter removing process is inputted to the catalytic reactor 200 and then the catalytic reaction process is performed, the livestock wastewater after the operation of the livestock wastewater treatment device is completed (4h) It was confirmed that the amount of foreign matter in the livestock wastewater treatment apparatus was 105.0 ± 21.2 mg / L. Therefore, it was confirmed that the foreign matter removal efficiency of the livestock wastewater treatment apparatus was 85.7%.

According to the comparative example of the present invention, in the case of the nitrogen treatment system in the wastewater which does not perform the pretreatment step of removing impurities in the livestock wastewater, the amount of the foreign matter in the livestock wastewater after the completion of the wastewater treatment for 2 hours is 760.0 ± 0.0 mg / To 110 ± 28.3 mg / L, respectively. Accordingly, it was confirmed that the foreign matter removal efficiency of the nitrogen treatment system in the wastewater was 85.5%.

Therefore, the animal husbandry wastewater treatment apparatus according to the experimental example of the present invention was confirmed to have similar performance to the nitrogen treatment system in the wastewater according to the comparative example of the present invention, .

FIG. 8 is a graph showing the removal efficiency of nitrogen oxide versus the number of times of use of the catalyst in the wastewater treatment system according to the experimental example of the present invention and the comparative example.

Referring to FIGS. 1 to 8, in the nitrogen treatment system according to the comparative example of the present invention, the removal rate of nitrogen oxide by the use of the initial catalyst was 34.75%, but it decreased to 23.4% . ≪ / RTI >

In the case of the livestock wastewater treatment apparatus according to the experimental example of the present invention, the nitrogen oxide removal rate by the use of the initial catalyst was 31.9%, which was lower than the efficiency of the nitrogen treatment system in the wastewater according to the comparative example of the present invention. However, the livestock wastewater treatment apparatus according to the experimental example of the present invention records a high nitrogen oxide removal rate of 27.4% even when the catalyst is used five times, It can be confirmed that the use of the above catalyst is possible. In other words, the use of the livestock wastewater treatment apparatus according to the experimental example of the present invention prolongs the life of the catalyst.

FIG. 9 and FIG. 10 are graphs for explaining pollutant removal efficiency of the livestock wastewater treatment apparatus according to the experimental example of the present invention. More specifically, FIG. 9 is a graph showing the removal efficiency of organic pollutants by time according to the total chemical oxygen demand (TCOD) of the livestock wastewater treatment apparatus, and FIG. 10 is a graph showing the removal efficiency FIG. 2 is a graph showing removal efficiencies of organic pollutants by time according to oxygen demand (Soluble Chemical Oxygen Demand, SCOD). FIG.

The total chemical oxygen demand (TCOD) and soluble chemical oxygen demand (SCOD) data are indicators for detecting the content of organic pollutants in livestock wastewater. More specifically, the decrease in total chemical oxygen demand (TCOD) or soluble chemical oxygen demand (SCOD) in the livestock wastewater according to one embodiment means that the content of organic pollutants in the livestock wastewater decreases.

9 and 10, the total chemical oxygen demand (TCOD) of the livestock wastewater measured 4 hours after the operation of the livestock wastewater treatment apparatus (240 min) is 3,700 mg / L . This means that the organic pollutants in the livestock wastewater have been removed by 3,700 mg / L of the initial measured amount, as described above. Therefore, it can be confirmed that the organic pollutant removal efficiency of the livestock wastewater treatment apparatus is 57.8%.

In addition, the biodegradable soluble chemical oxygen demand (SCOD) of the livestock wastewater measured after 4 hours (240 min) was reduced by 562 mg / L compared to the initial measured amount. Therefore, the removal efficiency of biologically degradable organic pollutants in the livestock wastewater by the livestock wastewater treatment apparatus can be confirmed to be 18.4%.

As a result, it can be confirmed that the livestock wastewater treatment apparatus has higher oxidation removal efficiency of organic pollutants which are difficult to be biodegraded. Accordingly, it can be inferred that in the livestock wastewater treatment apparatus, a chemical oxidation reaction by OH-radicals is actively performed.

The results are similar to the rate of change in total chemical oxygen demand (TCOD) and soluble chemical oxygen demand (SCOD) over time for the nitrogen treatment system in the wastewater according to the comparative example of the present invention. Therefore, it has been confirmed that the livestock wastewater treatment apparatus according to the experimental example of the present invention has similar performance to the nitrogen treatment system in the wastewater according to the comparative example of the present invention, which is desired to be released in the removal of organic pollutants.

11 is a graph showing the concentration and removal efficiency of nitrogen oxide (ammonia nitrogen) per hour in the livestock wastewater treatment apparatus according to the experimental example of the present invention.

1 to 7 and 11, the nitrogen oxide (ammonia nitrogen) of the livestock wastewater treatment apparatus was removed from the initial 420 mg / L to 286 mg / L, and the removal efficiency was 31.9%.

This is similar to the removal efficiency of nitrogen oxide (ammonia nitrogen) per hour of the nitrogen treatment system in the wastewater according to the comparative example of the present invention conducted under the same conditions.

12 is a graph showing the concentration (T-P concentration) and removal efficiency of phosphorus (P) per hour in the livestock wastewater treatment apparatus according to the experimental example of the present invention.

Referring to FIGS. 1 to 7 and 12, the removal efficiency of phosphorus (P) in the livestock wastewater treatment apparatus is as low as about 20% at the time of performing the foreign matter removal process, %, Respectively. Therefore, it can be confirmed that the livestock wastewater treatment apparatus can remove phosphorus (P) with high efficiency in livestock wastewater.

The apparatus for treating livestock wastewater according to the embodiment of the present invention and the operation method thereof have been described above. According to the present invention, the livestock wastewater treatment apparatus and the operation method thereof include a bubble generator, a catalytic reactor, a reservoir, a dirt removal channel, a catalyst circulation channel, and a valve unit, whereby the livestock wastewater It is possible to provide the separation-type livestock wastewater treatment apparatus capable of using the catalyst layer and having a high wastewater treatment efficiency and an operation method thereof.

In addition, the livestock wastewater treatment apparatus has a high efficiency of nitrogen oxide removal efficiency as compared with the nitrogen treatment system (Korean Patent No. 10-1570796) in the wastewater intended to be output by the applicant of the present invention, P) and the use of a long-life catalyst are complemented, thereby making it possible to provide the advanced livestock wastewater treatment apparatus and the operation method thereof.

While the present invention has been described in connection with what is presently considered to be practical and exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100; Bubble generator
110; Wastewater inlet
130; Oxidant inlet
135; Control valve
150; Pump
170; Perforated plate
200; Catalytic reactor
230; baffler
250; The catalyst layer
270; The first foreign matter removing pipe
300; Storage tank
350; The second foreign material removing pipe
400; Foreign matter removing flow path
430; In the first foreign material removing section,
450; The second foreign material removing section flow path
500; The catalytic circulation flow path
530; The first catalyst circulation interval flow path
550; The second catalyst circulation interval flow path
570; The third catalyst circulation interval flow path
600; The valve portion

Claims (16)

A bubble generator for bubbling livestock wastewater introduced from the outside by a wastewater inlet by an oxidant inlet, a pump and a perforated plate;
A catalytic reactor comprising a catalytic layer for causing a catalytic reaction with livestock wastewater;
A storage tank for temporarily storing the livestock wastewater treated from the bubble generator and the catalytic reactor;
A bubble eliminator for connecting the bubble generator and the reservoir to provide a circulation channel for circulating bubbled livestock wastewater; And
A catalytic circulation flow path that connects the storage tank, the bubble generator, and the catalytic reactor to provide a circulation flow path for circulating the livestock wastewater from which foreign matter has been removed;
By this,
Removing nitrogen oxide and phosphorus (P) components present in the livestock wastewater,
The catalytic reactor
A baffle and a baffle disposed at the lower end to maintain the bubbling livestock wastewater accelerated from the bubble generator at a constant speed;
And a catalytic layer positioned at an upper end of the baffle to cause a catalytic reaction with the livestock wastewater, wherein the number of the baffles is determined according to the flow rate of the livestock wastewater,
The pump
Wherein the control unit controls the flow of the livestock wastewater so as to move the livestock wastewater flowing through the wastewater inflow unit in one direction along the wastewater removal channel, The oxidizing agent is dissolved to form bubbles in the livestock wastewater,
The livestock wastewater
After repeatedly circulating the foreign matter removing passage for a predetermined time, the catalyst circulating passage is repeatedly circulated,
The foreign matter removing passage
A first foreign matter removing passage through which one end is connected to a lower side of the bubble generator and the other end is connected to a lower side of the storage tank; And
A second foreign matter removing passage through which one end is connected to the upper surface of the reservoir and the other end is connected to the upper surface of the bubble generator;
And a circulation path,
The catalyst circulating flow path
A first catalyst circulating flow passage having one end connected to the upper surface of the reservoir and the other end connected to the upper surface of the bubble generator;
A second catalytic circulation flow passage in which one end is connected to a lower surface of the bubble generator and the other end is connected to a lower surface of the catalytic reactor; And
A third catalytic circulation flow passage having one end connected to the upper surface of the catalytic reactor and the other end connected to the upper surface of the storage tank;
And a circulation path including the circulation path.
delete delete The method according to claim 1,
Wherein the livestock wastewater circulates the foreign matter removing channel repeatedly for 2 hours or more.
delete delete delete delete The method according to claim 1,
The reservoir and the catalytic reactor
And a cylindrical first and second debris removing pipes formed to protrude from the upper surface by a predetermined distance, respectively.
The method according to claim 1,
The catalyst layer
An apparatus for processing livestock wastewater characterized by comprising a catalyst in which at least one of a transition metal, an alkali metal, and an alkaline earth metal is supported on an oxide carrier.
11. The method of claim 10,
When the catalyst is a transition metal supported on the oxide support,
The oxide carrier is magnesium oxide (MgO)
Wherein the transition metal is iron (Fe).
Livestock wastewater is injected into the bubble generator and bubbled by the oxidant inlet, the pump and the perforated plate provided in the bubble generator;
Performing a debris removal process in which the livestock wastewater circulates along the dewatering flow path to remove foreign matter in the livestock wastewater through bubble generation; And
Performing a catalytic reaction process of circulating the livestock wastewater from which the foreign substances are removed by the foreign material removal process along the catalytic circulation flow path to remove nitrogen oxides and phosphorus (P) from the livestock wastewater in a catalytic reactor including the catalytic layer;
Lt; / RTI >
The foreign matter removing passage
A first foreign matter removing passage through which one end is connected to a lower side of the bubble generator and the other end is connected to a lower side of the storage tank; And
A second foreign matter removing passage through which one end is connected to the upper surface of the reservoir and the other end is connected to the upper surface of the bubble generator;
And a circulation path,
The catalyst circulating flow path
A first catalyst circulating flow passage having one end connected to the upper surface of the reservoir and the other end connected to the upper surface of the bubble generator;
A second catalytic circulation flow passage in which one end is connected to a lower surface of the bubble generator and the other end is connected to a lower surface of the catalytic reactor; And
A third catalytic circulation flow passage having one end connected to the upper surface of the catalytic reactor and the other end connected to the upper surface of the storage tank;
And a circulation path,
The catalytic reactor
A baffle located at the lower end to maintain the bubbling livestock wastewater accelerated from the bubble generator at a constant speed; And
A catalyst layer positioned at an upper end of the baffle to cause a catalytic reaction with the livestock wastewater;
Wherein the number of the baffles is determined according to the flow rate of the livestock wastewater,
The pump
Wherein the control unit controls the flow of the livestock wastewater so as to move the injected livestock wastewater in one direction along the dewatering flow path, dissolving the oxidizing agent introduced through the oxidant inflow unit, To form bubbles in the livestock wastewater,
The foreign matter removing process
Transferring the livestock wastewater bubbled by the bubble generator to the lower portion of the storage tank along the first foreign material removing section flow path;
Floating the foreign matter in the bovine livestock wastewater flowing into the lower part of the storage tank to the upper part of the storage tank; And
Transferring the livestock wastewater in the form of a bubble having a reduced foreign matter to the bubble generator along the second foreign material removing section flow path;
Lt; / RTI >
The catalytic reaction process
Transferring a bubble-shaped livestock wastewater from which the foreign substance is removed from the upper portion of the storage tank to the bubble generator along the first catalyst circulation passage;
Feeding the livestock wastewater re-bubbled from the bubble generator into the catalytic reactor along the second catalytic circulation passage;
Causing the catalytic reaction to occur while the livestock wastewater from which the foreign substances introduced into the catalytic reactor are removed passes through the catalyst bed; And
And along the third catalytic circulation passage. Introducing the livestock wastewater having a reduced concentration of nitrogen oxide and phosphorus (P) into the upper portion of the storage tank from the upper portion of the catalytic reactor by a catalytic reaction;
Is repeatedly carried out. ≪ IMAGE >
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