KR101964363B1 - Wastewater purification system with feedback circuit - Google Patents

Abstract

The present invention relates to a wastewater purification system having a feedback circuit unit. More particularly, the present invention relates to a wastewater purification system having a feedback circuit unit in which a feedback circuit unit including a bubble generator is installed in a discharge tank of a bioreactor to reduce the amount of dissolved oxygen in discharged water by recirculating a certain amount of the discharged water in a discharge tank to a collection tank, and to recycle aerobic microorganisms generated during a purification process, thereby promoting organic decomposition activity of the aerobic microorganisms. To this end, the wastewater purification system of the present invention comprises: a bioreactor configured to store wastewater, including a collection tank and a discharge tank, an inlet pipe through which the wastewater is introduced, an outlet pipe for discharging the wastewater, and a partition wall for partitioning a storage space; and a feedback circuit unit for recirculating a predetermined amount of discharged water installed on the discharge tank side of the bioreactor to the collection tank, and having at least one bubble generator installed on the recirculation path to allow bubble inflow during recirculation.

Description

Wastewater purification system with feedback circuit including nano micro bubble generator

The present invention relates to a wastewater purification system having a feedback circuit portion, and more particularly, a feedback circuit portion including a bubble generator in a discharge tank of a bioreactor, and recycling a predetermined amount of discharged water in the discharge tank to a collection tank, thereby dissolving the dissolved oxygen demand of the discharged water. The present invention relates to a wastewater purification system having a feedback circuit that can further promote organic decomposition of aerobic microorganisms by reducing the aerobic microorganisms generated in the purification process.

In general, various types of wastewater have a biological oxygen demand (BOD) in excess of hundreds to tens of thousands of ppm (eg, 20000 ppm).

Such wastewater treatment methods include many methods of treating wastewater with physics, chemistry, and microbiology such as vibrating screen method, pressure flotation method, flocculant treatment method, activated sludge method, rotary cylinder method (RBC method), and contact treatment method (HBC method). However, wastewater with high BOD, such as livestock manure, is difficult to treat and is frequently discharged to the rivers under the quality of the discharged water, thereby deteriorating the water quality and the environment.

Vibrating screen method of the conventional wastewater treatment method is to drop the wastewater and waste on the inclined vibrating screen so that foreign matter contained in the wastewater is filtered on the vibrating screen, and only the wastewater falls under the vibrating screen to be separated and moves the vibrating screen. To this end, waste of power was severe, and only a relatively large amount of foreign matter was removed, which was insufficient to meet the effluent standard.

In addition, the pressure flotation method generates bubbles under the reaction tank to apply the floating force to the foreign matter remaining in the water so that the foreign matter floats on the surface, and then separates the foreign matter by sweeping the water surface. It is effective only in the removal, and it is not effective for the removal of the organic matter dissolved in the water or the foreign matter in the form of very small particles, and consumes a lot of electric power because it has to give mechanical movement when sweeping the foreign matter on the water surface. It has a downside.

In addition, the flocculant treatment method is a method of flocculation treatment by adding a large amount of chemicals such as flocculant, and since the expensive flocculant must be used, the treatment cost is very expensive, and the flocculant used in the treatment process is not toxic and is not immediately discharged. Since the process must be non-toxic through the post-treatment process, the procedure is complicated and there is a problem in that contamination occurs when the toxicity cannot be completely removed.

In addition, activated sludge method is called "aeration method", and it is designed to promote organic decomposition of aerobic microorganisms by increasing the concentration of dissolved oxygen by generating a large amount of oxygen in the water by generating bubbles in the water. Subsequently, since the purification efficiency is low and suitable for low concentration wastewater purification, it is not effective for the purification of high concentration wastewater.

In addition, the rotary cylinder method is to increase the concentration of dissolved oxygen by rotating a drum provided with a plurality of holes, part of which is submerged in water to increase the air contact time and area of the wastewater. Although it is effective, the livestock wastewater of high concentration is difficult to purify the wastewater of high concentration because the manure or food waste in the wastewater gets stuck in the drum or fills holes, causing frequent breakdown during operation.

In addition, the contact treatment method is to immerse the microfiber-attached fibers of thin strands under the surface of the water and then to leave them to be decomposed by microorganisms.In addition, manure and food wastes are removed during high concentrations of wastewater purification, such as livestock wastewater. Since the same foreign matter sticks to the microorganism-attached fibers and kills the microorganisms native to the microorganism-attached fibers, there is an unsuitable problem for high concentration wastewater purification.

The present invention has been made in order to solve the above problems by installing a feedback circuit including a bubble generator in the discharge tank of the bioreactor to recycle a certain amount of the discharged water in the discharge tank to the collection tank to reduce the dissolved oxygen demand of the discharged water and purify It is an object of the present invention to provide a wastewater purification system having a feedback circuit that can further promote organic decomposition of aerobic microorganisms by recycling aerobic microorganisms generated in the process.

The present invention has the following features to achieve the above object.

The present invention includes a bioreactor for storing waste water, including a collection tank and a discharge tank, and including a partition wall for dividing waste water into an inflow pipe, a discharge pipe through which waste water is discharged, and a storage wall; And a feedback circuit unit configured to recycle a predetermined amount of discharged water discharged by being installed at the discharge tank side of the bioreactor to the collection tank, and at least one bubble generator is installed on the recirculation path to allow bubble inflow in the process of recycling.

Here, the discharge tank is a collection hopper for collecting the microorganisms generated in the flow of the discharge tank in the bioreactor is installed in the lower center.

In addition, the feedback circuit unit is a first inlet pipe for introducing the discharge water located on the upper side of the collecting hopper, and a second side which is disposed on the lower side of the first inlet pipe while being one side of the upper side of the collecting hopper 12a to introduce the discharge water containing microorganisms. An inlet pipe, a circulating pump for introducing discharged water from the first inlet pipe and the second inlet pipe to be recycled to the collection tank, a bubble generating pipe line installed at the rear end of the circulation pump, and having a bubble generator installed therein, and A bypass pipe line for recirculating the discharged water installed at the rear end directly to the collection tank, a first selective transfer valve installed at the rear end of the circulation pump and selectively transferring the discharged water to the bubble generating pipe and the bypass pipe; One of the first inlet pipe and the second inlet pipe is installed at the point where the first inlet pipe and the second inlet pipe communicate with each other in front of the circulation pump. Me comprises a second selection transfer valve to regulate the flow of the drain water.

In addition, the microorganism detection sensor unit is further provided on the upper side of the collecting hopper, and if it is determined that the microbial capture density is higher than the preset value according to the sensing data of the microorganism detection sensor unit to introduce the discharge water through the first inlet pipe. The first selective transfer valve is regulated so that the discharge water containing microorganisms is recycled to the collection tank at the same time as the second selective transfer valve is regulated, and the microorganism collection density is preset according to the sensing data of the microbial sensor. When it is determined that the value is lower than the value, the second selective transfer valve is intermitted to introduce the discharge water containing microorganisms through the second inlet pipe, and the first selective transfer valve is regulated so that the discharge water is recycled to the collecting tank side through the bubble generating line. The controller is further included.

In addition, the front end of the bioreactor further includes a flow adjusting tank for receiving and storing the incoming wastewater and supplying oxygen to supply oxygen to decompose organic matter by aerobic microorganisms and to control the flow rate of the wastewater to be transferred to the bioreactor. do.

According to the present invention, by installing a feedback circuit unit including a bubble generator in the discharge tank of the bioreactor, a certain amount of the discharged water in the discharge tank is recycled to the collection tank, thereby greatly reducing the dissolved oxygen demand of the discharged water.

In addition, by recycling the aerobic microorganisms generated in the purification process there is an effect that can further promote the organic decomposition of aerobic microorganisms.

In addition, by placing the microbial detection sensor unit in the microbial collection unit, there is no need to separately provide a microbial recycle configuration and the discharge water recycle configuration by recycling the water containing the microorganism or recycling the discharged water selectively according to the sensing data value of the microbial detection sensor.

1 is a view showing a waste water purification system according to an embodiment of the present invention.
2 is a view showing a waste water purification system according to another embodiment of the present invention.
3 is a view showing a waste water purification system according to another embodiment of the present invention.
4 is a diagram illustrating a feedback circuit unit according to another exemplary embodiment of the present invention.

In order to explain the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, the following describes exemplary embodiments of the present invention and looks at it with reference.

First, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, and singular forms may include plural forms unless the context clearly indicates otherwise. Also in this application, terms such as "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, one or more other It is to be understood that the present invention does not exclude the possibility of the presence or the addition of features, numbers, steps, operations, components, parts, or a combination thereof.

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.

1 is a view showing a waste water purification system according to an embodiment of the present invention.

Referring to the drawings, the wastewater purification system 100 according to an embodiment of the present invention stores wastewater largely, and includes a collection tank 11 and a discharge tank 12, and the wastewater is introduced and the inlet pipe 10a and A bioreactor 10 comprising a discharge pipe 10b through which waste water is discharged and a partition wall 10c partitioning the inside of the storage space, and a predetermined amount of discharge water installed and discharged at the discharge tank side of the bioreactor 10 is discharged. Recirculation to the collection tank, the feedback circuit is made of a feedback circuit portion 20 is formed in the bubble in the process of recirculation and at least one bubble generator is installed on the recycle path.

Here, the bioreactor 10 is provided to store the waste water and perform a purification process, the bioreactor 10 of the present invention is a collection tank 11 and the discharge tank 12 and the diesel oil tank 13 therebetween. It includes.

In the bioreactor 10 according to the embodiment of the present invention, the diesel oil tank 13 is formed in one place, but the diesel oil tank 13 may be formed or two or more places as necessary.

In addition, in the bioreactor 10, an inlet pipe 10a and an outlet pipe 10b are formed, respectively, and partition walls 10c partitioning between the collection tank 11, the diesel fuel tank 13, and the discharge tank 12. Is provided.

On the other hand, the discharge tank 12 is provided with a collecting hopper (12a) for collecting microorganisms to the lower center. The collection hopper 12a allows the microorganisms generated in the process of transporting waste water to the discharge tank 12 in the bioreactor 10 to be collected.

By collecting the useful microorganisms by the collecting hopper 12a and recycling them to the collection tank 11 through the feedback circuit 20 to be described later, the decomposition of organic matter through the microorganisms is further activated.

Meanwhile, the feedback circuit unit 20 recycles a predetermined amount of the discharged water in the discharge tank 12 to the collection tank, and has one or more nano-micro bubble generators 24a installed on the recirculation path so that bubbles are introduced in the process of being recycled. The feedback circuit unit 20 includes a first inlet pipe 21 for introducing discharge water located at one side of the upper side of the collecting hopper 12a and a lower side of the first inlet tube 21 while being one side of the upper side of the collecting hopper 12a. A second inlet pipe 22 disposed to the side to introduce the discharge water containing microorganisms, and a circulation for introducing the discharge water from the first inlet pipe 21 and the second inlet pipe 22 to be recycled to the collection tank 11 side; A collection tank for collecting the pump 23, the bubble generating pipe 24 installed at the rear end of the circulation pump 23, the bubble generator 24a is installed, and the discharged water introduced at the rear end of the circulation pump 23. I repeat it immediately to (11) side And a first selective transfer valve 26 installed at a rear end of the bypass pipe 25 and the circulation pump 23 to selectively transfer the discharged water to the bubble generating pipe 24 and the bypass pipe 25. The first inlet pipe 21 and the second inlet pipe 22 is installed at a point in communication with each other in front of the circulation pump 23 to any one of the first inlet pipe 21 and the second inlet pipe (22). Installed at a point where the bubble generating line 24 and the bypass line 25 branch and communicate again through the second selective transfer valve 27a for controlling the inflow of discharge water and the first selective transfer valve 26. And a third selective transfer valve 27b for controlling the discharge of the discharged water.

Here, the first inlet pipe 21 is an upper end side of the collection hopper 12a and an inlet end is located at the center upper side of the discharge tank 12 so as to receive the upper layer discharge water having a low density of microorganisms in the discharge tank 12. The second inflow pipe 22 is an upper end side of the collection hopper 12a and an inflow end portion of the discharge tank 12 so as to receive a lower density of microorganisms in the discharge tank 12. Is located.

In addition, the circulation pump 23 is provided to provide a circulation force so that the discharge water from the discharge tank 12 is circulated from the first inlet pipe 21 and the second inlet pipe 22, such a circulation pump 23 Is installed at the rear end of the first inlet pipe 21 and the second inlet pipe 22 and inflow of the discharge water of any one of the first inlet pipe 21 and the second inlet pipe 22 of the discharge tank 12. Transported to the collection tank 11 and discharged.

In addition, an external air inlet pipe 21a is installed on the path of the first inlet pipe 21 positioned at the front end of the communication point between the first inlet pipe 21 and the second inlet pipe 22 to allow external air to flow therein. When the discharged water is introduced from the first inlet pipe 21, the external air is introduced into the external air inlet pipe 21a so that the external air is included in the discharged water.

Here, the circulation pump 23 may be transferred to two paths when the discharge water is transferred to the collection tank 11. First, the circulation pump 23 is installed at the rear end of the circulation pump 23, and the nano-micro bubble generator 24a is installed. The bubble generating pipe 24 and the bypass pipe 25 is installed at the rear end of the circulation pump 23 to immediately recycle the discharged water to the collection tank 11.

That is, when the discharged water is introduced from the first inlet pipe 21, it passes through the bubble generating channel 24 so that a large amount of nanomicro bubbles in the discharged water is included, and a large amount of microorganisms are included from the second inlet pipe 22. When the discharged discharged water is introduced, the discharged water is transferred to the collection tank 11 via the bypass pipe 25 to be discharged.

In addition, the first selective transfer valve 26 is installed at the rear end of the circulation pump 23 for the path control to selectively transfer the discharged water to the bubble generating pipe 24 and the bypass pipe 25, and the first The first inlet pipe 21 and the second inlet pipe 22 are installed at the point in communication with each other in front of the circulation pump 23, the inflow of the discharge water into any one of the first inlet pipe 21 and the second inlet pipe 22. The second selective transfer valve (27a) to regulate the and the bubble generating line 24 and the bypass line (25) branched through the first selective transfer valve 26 and is installed at a point where the communication again to the discharge water A third selective transfer valve 27b for controlling discharge is configured, and a controller 40 for controlling the discharge is included.

The reason for the path control to the bypass pipe line 25 or the bubble generating line 24 is to bypass the discharge water containing the microorganisms through the second inlet pipe 22 when the microorganisms are sufficiently collected in the collecting hopper 12a. Transfer to the collection tank 11 through the pipe line 25, and discharge the discharge water through the first inlet pipe 21 through the first inlet pipe 21 until the microorganisms are sufficiently collected in the collecting hopper (12a) bubble generating pipe ( 24) is conveyed to the collection tank 11 in a state that the bubble supply is guided smoothly.

Therefore, whether the microorganisms have been sufficiently collected is determined by the controller 40 through the microbial sensor 30, such a microbial sensor 30 may be a turbidimeter.

Accordingly, the controller 40 intercepts the first selective transfer valve 26, the second selective transfer valve 27a, and the third selective transfer valve 27b through the sensing data of the microbial sensor 30 and discharge tanks. (12) Transfer the discharged water to the collection tank 11, and discharge it.

In addition, the bioreactor 10 is provided with an oxygen supply unit 50 for supplying oxygen to promote organic decomposition, the oxygen supply unit 50 is branched to the collection hopper 11, diesel hopper 13, discharge hopper 12 The injection unit 51 is installed at each end to the side to supply oxygen.

The oxygen supply unit 50 may be removed as necessary as the feedback circuit unit 20 according to the present invention is activated, and the amount of oxygen supplied may be reduced, thereby reducing the power capacity of the blower, which is a power source for oxygen supply. This can reduce the total power used.

2 is a view showing a waste water purification system according to another embodiment of the present invention.

Referring to the drawing, the wastewater purification system 100 according to the present embodiment receives the stored wastewater introduced into the front of the bioreactor 10 and stores oxygen and supplies oxygen so that organic matter decomposition by aerobic microorganisms is performed. And a flow rate adjustment tank 60 for intermittently controlling the flow rate of the waste water to be transferred to the bioreactor 10.

Here, the flow rate adjustment tank 60 receives waste water from the front end of the bioreactor 10 and temporarily stores it, and decomposes organic matter by oxygen supplied through the oxygen supply unit 50 and reduces the corruption of the waste water stored therein. It is effective to prevent.

Accordingly, the wastewater is stored in the flow rate adjusting tank 60 and organic matter is decomposed through the supplied oxygen, and the wastewater is supplied to the bioreactor 10 to be purified.

3 is a view showing a waste water purification system according to another embodiment of the present invention.

Referring to the drawings, the wastewater purification system 100 according to the present embodiment is a flow rate adjusting tank 60 in the above-described embodiment via the discharge water or the bypass pipe 25 via the nano-micro bubble generator 24a. Effluent is configured to be transported to, discharged to the flow adjustment tank (60).

Of course, if necessary, the transfer control valve 28 is installed can be configured so that the discharged water can be selectively transported and discharged out of the collection tank 11 and the flow control tank 60, and control the opening and closing of such a transfer control valve 28 Is performed by the controller 40, of course.

Effluent via the nano-micro bubble generator (24a) includes a large amount of negative ions generated along with the generation of nano or micro bubbles, these anions further increase the effect of decomposition and decay of various organic matter in the flow control tank (60).

4 is a diagram illustrating a feedback circuit unit according to another exemplary embodiment of the present invention.

Referring to the drawings, the feedback circuit unit 20 according to the present embodiment has a recycling circuit unit 20a is formed so that the discharge water flowing from the first inlet pipe 21 is recycled to the first inlet pipe 21 through the circulation pump and recycled As the plurality of nano-micro bubble generator 24a is installed on the path, the nano-micro bubble content is increased in the discharge water discharged to the collection tank 11 or the flow adjusting tank 60.

Of course, the discharged water recycled through the recirculation circuit part 20a is determined according to the opening degree control of the recirculation control valve 29 installed at the front end of the first selective transfer valve 26, and the smaller the opening degree, the lower the opening amount of the recirculation control valve 29. The pressure is increased to increase the amount of discharged water recycled to the recirculation circuit portion 20a.

Therefore, when the recycle rate of the discharged water is increased, the number of diesel oil passing through the nano-microbubble generator 24a of the recycle circuit unit 20a increases, and thus the nano-microbubble content in the discharged water increases, compared to the number of nano-microbubble generators 24a installed. The generation content can be maximized.

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but this is merely an example, and those skilled in the art may realize various modifications and other equivalent embodiments therefrom. Will understand.

Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

10: bioreactor 11: collection tank
12: discharge tank 13: diesel oil tank
20: feedback circuit section 30: microbial detection sensor section
40: controller 50: oxygen supply unit
60: flow rate adjusting tank 100: wastewater purification system

Claims (5)

A partition wall 10c for storing waste water, including a collection tank 11 and a discharge tank 12, and partitioning the inside of the storage space and a discharge pipe 10b through which the waste water is introduced and the discharge pipe 10a and the waste water are discharged. A bioreactor 10 comprising a;
The process of recycling the quantitative amount of the discharged water discharged by being installed on the discharge tank 12 side of the bioreactor 10 to the collection tank 11, wherein at least one nano-micro bubble generator 24a is installed on the recirculation path and recycled. The feedback circuit unit 20 is made of the bubble inflow;
The discharge tank 12 is
A collecting hopper 12a for collecting microorganisms generated in the process of flowing into the discharge tank 12 in the bioreactor 10 is installed at the lower center side,
The feedback circuit unit 20
A first inlet pipe 21 positioned at an upper side in the collecting hopper 12a to introduce discharge water;
A second inlet pipe 22 positioned at a lower side in the collection hopper 12a to introduce discharge water containing microorganisms,
A circulating pump 23 for introducing the discharged water from the first inlet pipe 21 and the second inlet pipe 22 to be recycled to the collection tank 11;
A bubble generating pipe 24 installed at a rear end of the circulation pump 23 and having a bubble generator 24a installed therein;
A bypass pipe line 25 installed at the rear end of the circulation pump 23 to immediately recirculate the discharged water to the collection tank 11;
A first selective transfer valve 26 installed at a rear end of the circulation pump 23 to selectively transfer the discharged water to the bubble generating pipe 24 and the bypass pipe 25;
The first inlet pipe 21 and the second inlet pipe 22 is installed at a point in communication with each other in front of the circulation pump 23, the discharge water to any one of the first inlet pipe 21 and the second inlet pipe 22. It comprises a second selective transfer valve (27a) for regulating the inflow of,
The microorganism detection unit 30 is installed on the upper side of the collecting hopper 12a, and if it is determined that the microorganism collection density is higher than a preset value according to the sensing data of the microorganism detection sensor 30 While intermittently controlling the second selective transfer valve 27a to introduce the discharge water containing the microorganisms through the inflow pipe 22, the discharge water containing the microorganisms may be recycled to the collection tank 11 toward the bypass pipe 25. To control the first selective transfer valve 26,
If it is determined that the microbial trapping density is lower than a predetermined set value according to the sensing data of the microorganism detection sensor 30, the second selective transfer valve 27a is interrupted to introduce the discharged water through the first inlet pipe 21. At the same time, the feedback circuit portion including a nano-micro bubble generator, characterized in that it comprises a controller 40 for controlling the first selective transfer valve 26 so that the discharged water to the bubble generating pipe 24 to the collecting tank 11 side Wastewater purification system having a.
delete delete delete The method of claim 1,
The front end of the bioreactor 10 receives and stores the incoming wastewater and supplies oxygen to control the organic matter decomposition by aerobic microorganisms, and regulates the flow rate of the wastewater transferred to the bioreactor 10. Wastewater purification system having a feedback circuit portion including a nano-micro bubble generator, characterized in that it further comprises a flow rate adjustment tank (60).

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