KR102683058B1 - Water treatment system using rapid coagulation-multistep partition barrier type floatation apparatus - Google Patents

Abstract

According to the present invention, a multi-diaphragm type flotation separation device (400) that removes suspended solids contained in wastewater by floating them on the water surface; And a watertight internal space is formed and divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130 by a partition wall 111 extending upward from the bottom of the inner space, and the ammonia single-axis degassing tank 120 includes Water treatment in which a sewage water inlet 121 is formed through which wastewater from which suspended substances have been removed is supplied by the multi-stage partition-type flotation separator 400, and a treated water outlet 131 through which treated wastewater is discharged is formed in the organic matter oxidation tank 130. It includes an ammonia single-axis degassing device 100 including a chamber 110 and a chemical supply unit 140 that supplies hypochlorous acid-based chemicals used to degassing ammonia contained in wastewater to the water treatment chamber 110, The ammonia single-axis degassing tank 120 is equipped with degassing diffuser pipes 151a and 151b that form bubbles with air supplied from the blower 153 so that the supplied wastewater and chemicals are mutually agitated, thereby removing ammonia contained in the wastewater. The component is removed through a degassing reaction with the hypochlorous acid-based component of the drug, and the organic matter oxidation tank 130 is provided with a blower 153 so that the wastewater flowing in from the ammonia single-axis degassing tank 120 is stirred while overflowing the partition wall 111. A water treatment system is disclosed that is equipped with an oxidation tank 152 that forms bubbles with air supplied from the wastewater and removes organic matter and E. coli contained in the wastewater through an oxidation reaction with the hypochlorous acid-based components remaining in the wastewater.

Description

Water treatment system using high-speed coagulation-multi-stage partition type flotation separator and ammonia single-axis degassing device {WATER TREATMENT SYSTEM USING RAPID COAGULATION-MULTISTEP PARTITION BARRIER TYPE FLOATATION APPARATUS}

The present invention relates to a water treatment system using a high-speed coagulation-multi-stage partition-type flotation separation device and an ammonia single-axis degassing device. More specifically, the present invention relates to a water treatment system using a high-speed coagulation device and a multi-stage partition-type flotation separation device arranged sequentially in the flow direction of wastewater. A water treatment system using a high-speed coagulation-multi-stage partition-type flotation separator and an ammonia single-axis degassing device to effectively remove ammonia from wastewater that has been pretreated to remove material particles through an ammonia single-axis degassing device using hypochlorous acid-based chemicals. It's about.

In general, ammonia in wastewater is a representative pollutant. If not thoroughly purified, eutrophication (green algae) occurs in rivers and foul odors occur in wastewater treatment plants. In addition, ammonia consumes dissolved oxygen (DO, Dissolved Oxyge) contained in water, creating an anaerobic state and acting as a poison to fish.

In addition, the nitrogen component in the wastewater is converted to ammonia through a wastewater treatment facility and then treated through nitrification and denitrification processes. However, there is a problem that a lot of energy and resources are input during the treatment process. As of 2019, the amount of electricity used in domestic wastewater treatment facilities amounts to 3,650 GWh. This usage corresponds to 0.7% of the total electricity supplied domestically (520,499 GWh), and the electricity used to remove nitrogen from water such as ammonia amounts to about 30%.

Conventionally, microorganisms, reverse osmosis, or ammonia degassing were used to remove ammonia contained in wastewater. Here, when using nitrifying microorganisms or anammox microorganisms, a long residence time of usually 12 to 48 hours is required, so there is a problem that the scale of the wastewater treatment facility becomes enormous in order to treat the required amount of wastewater treatment.

In addition, when using the physical method of reverse osmosis (RO), it is possible to remove more than 90% of ammonia contained in wastewater, but there is a problem in that membrane filtration requires enormous replacement costs due to power costs and lifespan, and ammonia When using the degassing method, the treatment efficiency is low compared to the cost of the chemical input, so it is not widely used.

Publication of Patent No. 10-2023-0055598 (2023.04.26), Sewage and wastewater treatment system using amino acid fermentation microorganisms. Registered Patent Publication No. 10-0882802 (2009.02.03), Biological treatment and filtration device for advanced wastewater treatment and wastewater recycling method using the same.

The present invention was created to solve the above-mentioned problems, and the purpose of the present invention is to have a structure in which sewage wastewater and hypochlorous acid-based chemicals are rapidly stirred to remove ammonia contained in wastewater within a short period of time (for example, 1 to 2 hours). Water treatment using a high-speed coagulation-multi-diaphragm flotation separator and ammonia single-stage degassing device, which can effectively remove the power used for water treatment and thus significantly reduce the power used for water treatment, increase the water treatment volume, and miniaturize the size of the water treatment system. It is about providing a system.

Another object of the present invention is to divide the inside of the water treatment chamber into an ammonia single-axis degassing tank and an organic matter oxidation tank. The ammonia single-axis degassing tank intensively removes ammonia, and the organic matter oxidation tank intensively removes organic matter from the wastewater from which ammonia has been removed, thereby discharging the wastewater. The aim is to provide a water treatment system using a high-speed coagulation-multi-diaphragm type flotation separator and ammonia single-stage degassing device that can effectively remove contained ammonia and organic matter and significantly reduce wastewater treatment time.

The water treatment system according to the present invention for achieving the above object includes a multi-stage partition-type floating separation device 400 that removes suspended solids contained in wastewater by floating them on the water surface; And a watertight internal space is formed and divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130 by a partition wall 111 extending upward from the bottom of the inner space, and the ammonia single-axis degassing tank 120 includes Water treatment in which a sewage water inlet 121 is formed through which wastewater from which suspended substances have been removed is supplied by the multi-stage partition-type flotation separator 400, and a treated water outlet 131 through which treated wastewater is discharged is formed in the organic matter oxidation tank 130. It includes an ammonia single-axis degassing device 100 including a chamber 110 and a chemical supply unit 140 that supplies hypochlorous acid-based chemicals used to degassing ammonia contained in wastewater to the water treatment chamber 110, The ammonia single-axis degassing tank 120 is equipped with a degassing diffuser 151 inside which forms bubbles with air supplied from the blower 153 so that the supplied wastewater and chemicals are agitated with each other, so that the ammonia component contained in the wastewater is removed. It is removed through a degassing reaction with the hypochlorous acid-based components of the medicine, and the organic matter oxidation tank 130 is supplied from a blower 153 so that the wastewater flowing in from the ammonia single-axis degassing tank 120 flows over the partition wall 111 and is agitated. An oxidizing oxygen diffuser 152 that forms bubbles with the exposed air is provided inside, so that organic matter and E. coli contained in the wastewater can be removed through an oxidation reaction with the hypochlorous acid-based components remaining in the wastewater.

Here, the wastewater inlet 121 is disposed at a lower position of the ammonia single-axis degassing tank 120, and inside the ammonia single-axis degassing tank 120, there is a wall between the wastewater inlet 121 and the partition wall 111 from the bottom. It is provided with a first partition wall 122 that extends upward and guides the wastewater flowing into the lower part to rise, and the degassing diffuser 151 is disposed at the lower position between the wastewater inlet 121 and the first partition wall 122. This allows air bubbles to be discharged upward.

In addition, inside the ammonia single-axis degassing tank 120, a second tank extends downward from the ceiling between the first partition wall 122 and the partition wall 111 and guides the wastewater that has overflowed the first partition wall 122 to descend. A partition 123 is further provided, and the degassing diffuser 151 is disposed at a lower position between the first partition 122 and the second partition 123 to discharge bubbles upward.

In addition, the treated water outlet 131 is disposed at an upper position of the organic material oxidation tank 130, and inside the organic material oxidation tank 130, the sewage and wastewater that has overflowed the partition wall 111 extends downward from the ceiling surface. It is further provided with a third partition wall 132 that guides the organic matter to flow into the lower part of the oxidation tank 130, and the oxidation tank diffuser 152 is located in the lower part between the third partition wall 132 and the treated water outlet 131. It is placed in a position to discharge air bubbles upward.

In addition, the chemical supply unit 140 is connected to a chemical storage tank 141 in which hypochlorous acid-based chemicals are stored, and is connected to the chemical storage tank 141 to receive the stored chemical, and is connected to the sewage inlet 121 of the ammonia single-axis degassing tank 120. ) is connected to the sewage water supply pipe 125 that supplies sewage water to the sewage inlet 121 in the form of a mixture of the transported wastewater and hypochlorous acid chemicals while discharging a set amount of hypochlorous acid-based chemicals into the inside of the sewage water supply pipe 125. It may include a chemical pump 142 that allows the chemical to flow into.

In addition, an ammonia sensor 600 disposed inside the organic matter oxidation tank 130 and detecting ammonia components and outputting an ammonia detection value; And a signal is connected to the chemical pump 142 to control the operation to control the discharge amount of hypochlorous acid-based chemicals discharged from the chemical pump 142, where the ammonia detection value received from the ammonia sensor 600 exceeds the set appropriate standard. If so, the discharge amount of hypochlorous acid-based chemicals increases, and if it is less than the set appropriate standard, it may further include a control unit 700 that controls the emission amount of hypochlorous acid-based chemicals to decrease.

Meanwhile. The multi-stage partition type floating separator 400 has a watertight internal space, a sewage water inlet 412 through which sewage water flows in is formed on one side, and a treated water outlet 413 through which treated wastewater is discharged is formed on the other side. In the internal space, a plurality of lower partitions 414 extending upward from the floor and a plurality of upper partitions 415 extending downward from the ceiling are alternately arranged to form a plurality of bubble reaction tanks 410 (410). ) and a bubble generator 420 that generates micro- or nano-sized microbubbles and supplies them to the internal space, and the ammonia single-axis degassing tank 120 is located at the rear end of the multi-stage partition type flotation separator 400. It is placed in the wastewater supply pipe 125, and the sewage inlet 121 of the ammonia single-axis degassing tank 120 is connected to the treated water outlet 413 of the reaction chamber 410 by the multi-stage partition type flotation separator 400. Treated wastewater can be supplied.

According to the water treatment system using a high-speed coagulation-multistage partition type flotation separation device and ammonia single-stage degassing device according to the present invention,

First, the multi-stage partition-type floating separator 400 removes suspended solids contained in sewage and wastewater by floating them on the water surface, and the ammonia single-axis degassing device 100 forms a watertight internal space and extends upward from the bottom of the internal space. It is divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130 by a partition wall 111, and the ammonia single-axis degassing tank 120 contains wastewater from which suspended solids have been removed by a multi-stage partition-type flotation separator 400. A water treatment chamber 110 is formed with a wastewater inlet 121 through which wastewater is supplied, and a treated water outlet 131 through which the treated wastewater is discharged is formed in the organic matter oxidation tank 130. It includes a chemical supply unit 140 that supplies chloric acid-based chemicals to the water treatment chamber 110, and the ammonia single-axis degassing tank 120 is configured to bubble with air supplied from the blower 153 so that the supplied sewage water and chemicals are mutually agitated. A degassing tank diffuser (151) forming a An oxidation tank diffuser 152 is provided inside to form bubbles with the air supplied from the blower 153 so that the wastewater flowing in from the ammonia single-axle degassing tank 120 is agitated while overflowing, so that organic matter and E. coli contained in the wastewater are removed from the wastewater. In order to remove the remaining hypochlorous acid-based components through an oxidation reaction, it has a structure in which sewage water and hypochlorous acid-based chemicals are rapidly stirred to effectively remove ammonia contained in wastewater within a short period of time (for example, 1 to 2 hours). It can be removed, thereby significantly reducing the power used for water treatment, and increasing the amount of water treated per unit time, allowing the size of the water treatment system to be miniaturized.

In addition, the interior of the water treatment chamber 110 is divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130, so that ammonia is intensively removed in the ammonia single-axis degassing tank 120, and ammonia is removed in the organic matter oxidation tank 130. By intensively removing organic substances in the wastewater, ammonia and organic substances contained in the wastewater can be effectively removed and wastewater treatment time can be significantly reduced.

Second, the wastewater inlet 121 is disposed at a lower position of the ammonia single-axis degassing tank 120, and inside the ammonia single-axis degassing tank 120, there is a wall between the wastewater inlet 121 and the partition wall 111 from the bottom. It is provided with a first partition wall 122 that extends upward and guides the wastewater flowing into the lower part to rise, and the degassing diffuser 151 is disposed at the lower position between the wastewater inlet 121 and the first partition wall 122. By discharging bubbles upward, the sewage water flowing into the lower part is guided by the first partition 122 and rises, and is rapidly stirred with hypochlorous acid-based chemicals by bubbles discharged from the degassing diffuser 151, thereby releasing chloramine. Ammonia can be removed primarily through a degassing reaction.

Third, inside the ammonia single-axis degassing tank 120, a second tank extends downward from the ceiling between the first partition wall 122 and the partition wall 111 and guides the wastewater that has overflowed the first partition wall 122 to descend. A partition 123 is further provided, and the degassing diffuser 151 is disposed at a lower position between the first partition 122 and the second partition 123 to discharge air bubbles upward, so that the first partition 122 ), the wastewater that has overflowed is guided by the second partition wall (123) and while descending, is rapidly agitated with hypochlorous acid-based chemicals by bubbles discharged from the degassing diffuser (151), and undergoes a degassing reaction in the form of chloramine (2). Subsequently, ammonia can be removed. In addition, a secondary degassing reaction can be performed on wastewater in which ammonia has been reduced through the primary degassing reaction, which can significantly reduce the ammonia removal time through the degassing reaction in the form of chloramine and significantly increase the water treatment amount per unit time. there is.

Fourth, the treated water outlet 131 is disposed at an upper position of the organic material oxidation tank 130, and extends downward from the ceiling surface inside the organic material oxidation tank 130, so that the wastewater that has overflowed the partition wall 111 flows downward. It is further provided with a third partition wall 132 that guides the organic matter to flow into the lower part of the oxidation tank 130, and the oxidation tank diffuser 152 is located in the lower part between the third partition wall 132 and the treated water outlet 131. By discharging air bubbles upward by being placed in a position, the wastewater flowing into the lower part is guided by the third partition 132 and while rising, the remaining hypochlorous acid-based chemicals and Rapid stirring can oxidize remaining organic matter, kill and deodorize E. coli, and improve the color of wastewater.

Fifth, the chemical supply unit 140 is connected to a chemical storage tank 141 in which hypochlorous acid-based chemicals are stored, and is connected to the chemical storage tank 141 to receive the stored chemical, and is connected to the sewage inlet 121 of the ammonia single-axis degassing tank 120. ) is connected to the sewage water supply pipe 125 that supplies sewage water to the sewage inlet 121 in the form of a mixture of the transported wastewater and hypochlorous acid chemicals while discharging a set amount of hypochlorous acid-based chemicals into the inside of the sewage water supply pipe 125. It includes a chemical pump 142 that flows into the ammonia single-axis degassing tank 120, and can significantly reduce the time required for stirring wastewater and hypochlorous acid-based chemicals in the ammonia single-axis degassing tank 120. Degassing reaction efficiency can be maximized.

Sixth, the ammonia sensor 600 is disposed inside the organic matter oxidation tank 130 and detects the ammonia component and outputs an ammonia detection value, and the control unit 700 is signal connected to the chemical pump 142 to operate the chemical pump ( 142), the operation is controlled to control the amount of hypochlorous acid-based chemicals discharged from the ammonia sensor 600. However, if the ammonia detection value received from the ammonia sensor 600 exceeds the set appropriate standard, the amount of hypochlorous acid-based chemicals discharged increases and falls below the set appropriate standard. By controlling the discharge amount of hypochlorous acid-based chemicals to decrease, it is possible to automatically adjust so that an appropriate amount of hypochlorous acid-based chemicals is injected in real time even if the ammonia content contained in the wastewater flowing into the water treatment chamber 110 changes. By converting the input amount of chemicals to chloramine components before the breakthrough point chlorine input stage and degassing them, the amount of hypochlorous acid-based chemicals used can be significantly reduced.

Seventh, the multi-stage partition type floating separation device 400 has a watertight internal space, a sewage water inlet 412 through which sewage water flows in is formed on one side, and a treated water outlet 413 through which treated sewage water is discharged on the other side. A reaction chamber is formed in the internal space of which a plurality of lower partitions 414 extending upward from the floor and a plurality of upper partitions 415 extending downward from the ceiling are alternately arranged to form a plurality of bubble reaction tanks 416. (410) and a bubble generator 420 that generates micro- or nano-sized microbubbles and supplies them to the internal space, and the ammonia single-axis degassing tank 120 is located at the rear end of the multi-stage partition type flotation separator 400. It is placed in the wastewater supply pipe 125, and the sewage inlet 121 of the ammonia single-axis degassing tank 120 is connected to the treated water outlet 413 of the reaction chamber 410 by the multi-stage partition type flotation separator 400. By supplying treated wastewater, the ammonia component of wastewater pretreated with hypochlorous acid-based chemicals can be effectively removed, purification can be done in a short time, and suspended solids contained in the treated water and discharged can be minimized.

1 is a schematic diagram showing the configuration of a water treatment system according to a preferred embodiment of the present invention;
Figure 2 is a side view showing the configuration of an ammonia single-axis degassing device according to a preferred embodiment of the present invention;
Figure 3 is a side view showing the configuration of a multi-stage partition type floating separation device according to a preferred embodiment of the present invention;
Figure 4 is a side view showing the configuration of a non-powered floc flocculation device according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle of definability, it must be interpreted with meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, various alternatives are available to replace them. It should be understood that equivalents and variations may exist.

Before describing embodiments of the present invention, several terms described below are defined. 'Sewage water' referred to below refers to sewage and wastewater containing various pollutants, including sewage overflow (CSO), green algae (water-bloom), domestic wastewater, factory wastewater, leachate, excrement, and livestock wastewater. Refers to the processing target. Therefore, the 'suspended matter' contained in wastewater mentioned below refers to various types of pollutants including chemical sludge and high-concentration organic matter as well as impurities contained in large amounts in rainwater.

In addition, 'Coagulation' mentioned below is a term that refers to the phenomenon in which suspended substances become entangled by contact with each other to form a large lump. Hereinafter, 'coagulation' refers to the phenomenon of generally coagulating into a larger lump. It is described in a broad sense that includes this term, without distinction from the meaning of 'Flocculation'.

A water treatment system using a high-speed coagulation-multi-stage partition-type flotation separation device and an ammonia single-axis degassing device according to a preferred embodiment of the present invention includes a high-speed coagulation device 200 and a multi-stage partition-type flotation separation device ( It is a system equipped to effectively remove ammonia from wastewater that has been pretreated to remove suspended solid particles through the ammonia single-axle degassing device 100 using a hypochlorous acid-based chemical, as shown in FIG. 1. It includes a single-axis degassing device (100), a high-speed flocculation device (200), a non-powered floc flocculation device (300), and a multi-stage partition-type flotation separation device (400).

First, the ammonia single-axis degassing device 100 is a high-speed mixing device 500, a non-powered floc flocculation device 300, and a multi-stage partition type flotation separator 400 to remove the ammonia and wastewater pretreated to remove suspended solids. As a device for removing organic substances, it includes a water treatment chamber 110 and a chemical supply unit 140, as shown in FIGS. 1 and 2.

First, the water treatment chamber 110 is a storage tank that provides space for removing ammonia and organic matter contained in wastewater, respectively. A watertight inner space is formed and a partition wall 111 extends upward from the bottom of the inner space. It is divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130.

Here, a wastewater inlet 121 through which wastewater is supplied is formed in the ammonia single-axis degassing tank 120, and a treated water outlet 131 through which treated wastewater is discharged is formed in the organic matter oxidation tank 130.

In addition, the partition wall 111 can prevent wastewater in which ammonia has not yet been degassed from the ammonia single-axis degassing tank 120 from flowing into the organic matter oxidation tank 130, and the second partition wall 123, which will be described later, And the third partition wall 132 is disposed on both sides with the partition wall 111 in between to prevent wastewater without ammonia from being degassed from overflowing the partition wall 111 and flowing into the organic matter oxidation tank 130. It can be blocked fundamentally.

In addition, the water treatment chamber 110 is formed as a tank type with its interior sealed to prevent the foul odor of the incoming wastewater from leaking to the outside, and is preferably made of a material with excellent corrosion resistance and wear resistance, such as SUS.

The chemical supply unit 140 is disposed at the front of the water treatment chamber 110 and supplies hypochlorous acid-based chemicals used to degass the ammonia contained in wastewater to the water treatment chamber 110.

Here, sodium hypochlorite (NaOCl) can be preferably used as the hypochlorous acid-based chemical, and in addition, slightly acidic HOCl (slightly acidic hypochlorous acid), sodium dichloroisocyanurate (DCCNa), and chlorine dioxide (ClO ₂ ), etc. can also be used. These hypochlorous acid-based chemicals can be supplied dissolved in water, and in some cases, may be supplied in powder form. Hereinafter, the use of sodium hypochlorite as the hypochlorous acid-based chemical will be described as an example.

In addition, as shown in Figures 1 and 2, the ammonia single-axis degassing tank 120 is a plurality of devices that form bubbles with air supplied from the blower 153 so that the sewage water and chemicals supplied from the sewage inlet 121 are mutually agitated. Two degassing diffuser pipes 151a and 151b are provided inside to remove the ammonia contained in the wastewater through a degassing reaction with the sodium hypochlorite component of the medicine. That is, the ammonia component reacts with the hypochlorous acid-based component of the drug and is converted to chloramine component, which is then removed by degassing through strong aeration and stirring.
Here, as shown in FIG. 2, the sewage inlet 121 is formed to open laterally at the lower position of the ammonia single-axis degassing tank 120 and can supply sewage and wastewater toward the first degassing tank diffuser 151a.

In addition, the organic matter oxidation tank 130 is an oxidation tank diffuser that forms bubbles with air supplied from the blower 153 so that the wastewater flowing in from the ammonia single-axis degassing tank 120 is agitated while overflowing the partition wall 111. 152) is provided inside to remove organic matter and E. coli contained in the wastewater through an oxidation reaction with the sodium hypochlorite component remaining in the wastewater.

The blower 153 is connected to each diffuser (151a, 151b, 152) and can supply airflow generated while rotating to the degassing diffuser (151a, 151b) and the oxidizing diffuser (152), and is connected to a signal. The rotation timing or rotation speed can be driven and controlled according to the control signal from the control unit 700. In addition, the drawing illustrates that the degassing diffuser 151a, 151b and the oxidizing diffuser 152 are connected together to one blower 153 to receive air at the same time, but this is not limited to this, and each air diffuser 151a , 151b, 152) Each blower 153 is provided to be matched so that air can be supplied individually.

The wastewater rapidly mixed with hypochlorous acid-based chemicals in the ammonia single-axis degassing tank 120 undergoes a violent degassing reaction with bubbles generated by the degassing tank diffusers 151a and 151b, and is degassed into ammonia gas, and some of it is combined. It exists in the form of residual chlorine.

Here, the chemical reaction equation for degassing the ammonia is as follows.

Step 1: The available chlorine Cl ₂ contained in NaOCl reacts with water as shown in [Chemical Formula 1] below.

[Formula 1]

Cl₂ + H₂O → HOCl + HCl

HOCl → H+ + OCl-

Among these, HOCl reacts with ammonia as shown in [Chemical Formula 2] below.

[Formula 2]: Degassing reaction to form chloromere

NH₃ + HOCl → NH₂Cl↑ + H₂O

NH₂Cl + HOCl → NHCl₂↑ + H₂O

NHCl₂ + HOCl → NCl₃↑ + H₂O

Step 2: The available chlorine Cl ₂ contained in NaOCl reacts with ammonia as shown in [Chemical Formula 3] below.

[Formula 3]

3Cl ₂ +NH ₄ → N ₂ ↑+6HCl+2H ⁺

In addition, the wastewater further contains SBOD (Soluble Biochemical Oxygen Demand) and E. coli in addition to ammonia. The SBOD reacts with sodium hypochlorite and the dissolved BOD (Biochemical Oxygen Demand) is oxidized and decomposed to produce CO ₂ and H ₂ O. It is mineralized and decomposed in the form of E. coli, and its cell walls are destroyed by sodium hypochlorite and intracellular proteins are decomposed and eliminated through sterilization and disinfection.

The degassing tank diffuser (151a, 151b) and the oxidizing tank diffuser (152) function to provide bubbles for stirring the wastewater and hypochlorous acid-based chemicals to rapidly mix, and accelerate the degassing reaction of ammonia as necessary. It may also function to provide oxygen supply for oxygen.

A first exhaust port 124 is provided at the top of the ammonia single-axis degassing tank 120, so that the ammonia gas generated during degassing can be removed from the wastewater by being discharged to the outside through the first exhaust port 124.

In addition, in the organic matter oxidation tank 130, organic matter is oxidized in the process of agitating wastewater by sodium hypochlorite remaining after degassing ammonia (for example, 30 minutes). In the case of E. coli, cell walls are destroyed, and in the case of organic matter, oxidizing agent is used. Due to decomposition, the final products CO ₂ and H ₂ 0 are produced.

A second exhaust port 133 is provided at the top of the organic matter oxidation tank 130, so that by-product gases such as remaining ammonia gas and carbon dioxide can be discharged to the outside and removed from wastewater.

As described above, the supplied wastewater and hypochlorous acid-based chemicals are structured to be rapidly stirred, so that ammonia contained in the wastewater can be effectively removed within a short period of time (for example, 1 to 2 hours), thereby reducing the power used for water treatment. can be significantly reduced, and the amount of water treated per unit time can be increased, making it possible to miniaturize the ammonia single-axis degassing device (100).

In addition, the interior of the water treatment chamber 110 is divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130, so that ammonia is intensively removed in the ammonia single-axis degassing tank 120, and ammonia is removed in the organic matter oxidation tank 130. By intensively removing organic substances in the wastewater, ammonia and organic substances contained in the wastewater can be effectively removed and wastewater treatment time can be significantly reduced.

Meanwhile, as shown in FIG. 2, the wastewater inlet 121 is disposed at the lower position of the ammonia single-axis degassing tank 120, and the inside of the ammonia single-axis degassing tank 120 includes a wastewater inlet 121 and a partition wall ( 111), a first partition 122 is provided between the wastewater inlet 121 and the wastewater inlet 121, and the first partition 122 is provided to guide the sewage water flowing into the lower part to rise. 122), it is disposed at the lower position and discharges air bubbles upward, so that the wastewater flowing into the lower part is guided by the first partition wall 122 and rises by air bubbles discharged from the first degassing diffuser 151a. Ammonia can be primarily removed through a degassing reaction in the form of chloramine during the first degassing time (e.g., 3 to 10 minutes, preferably around 5 minutes) while rapidly stirring with the hypochlorous acid-based chemical.

And, as shown in the figure, inside the ammonia single-axis degassing tank 120, the wastewater extends downward from the ceiling between the first partition wall 122 and the partition wall 111 and overflows the first partition wall 122. It is further provided with a second partition wall 123 that guides it to descend, and the second degassing diffuser 151b is disposed at a lower position between the first partition wall 122 and the second partition wall 123 and moves toward the descending wastewater. Air bubbles can be discharged upward.

Therefore, while the wastewater overflowing the first partition 122 is guided by the second partition 123 and descends, it is rapidly agitated with hypochlorous acid-based chemicals by bubbles discharged from the second degassing diffuser 151b. Ammonia may be removed secondarily through a degassing reaction in which the ammonia component is transformed into a chloramine component during the second degassing time (for example, 3 to 10 minutes, preferably around 5 minutes). In addition, a secondary degassing reaction can be performed on wastewater in which ammonia has been reduced through the primary degassing reaction, which can significantly reduce the ammonia removal time through the degassing reaction in the form of chloramine and significantly increase the water treatment amount per unit time. there is.

In addition, as shown in FIG. 3, the treated water discharge port 131 is mounted at the upper position of the organic material oxidation tank 130, and extends downward from the ceiling inside the organic material oxidation tank 130 to form a partition wall 111. ) is further provided with a third partition 132 that guides the wastewater overflowing downward and flowing into the lower part of the organic matter oxidation tank 130, and the oxidation tank diffuser 152 is connected to the third partition 132 and the treated water. It is disposed at a lower position between the discharge ports 131 to discharge air bubbles upward.

Accordingly, the sewage water flowing downward through the lower end of the third partition 132 is rapidly agitated with the hypochlorous acid-based chemicals remaining by the bubbles discharged while rising toward the treated water discharge port 131, and the set oxidation time ( For example, for 20 to 40 minutes, preferably around 30 minutes, it is possible to oxidize remaining organic matter, kill and deodorize Escherichia coli, and improve the color of wastewater.
Additionally, as shown in FIG. 2 , the partition wall 111 may extend upward so that its upper end is positioned at a relatively higher position than the upper end of the first partition wall 122 . Through this partition wall 111, it is possible to minimize the flow of wastewater in which ammonia has not yet been degassed from the ammonia single-axis degassing tank 120 into the organic matter oxidation tank 130.

The control unit 700 drives and controls the blower 153 to control the amount of air bubbles discharged from the diffusers 151a, 151b, and 152 provided in the ammonia single-axis degassing tank 120 and the organic matter oxidation tank 130, respectively, or the air bubble supply rate. The residence time of wastewater in each space can be adjusted by adjusting the bubble supply pressure or controlling the inflow of wastewater supplied from the multi-diaphragm type flotation separator 400. Accordingly, the wastewater and hypochlorous acid series in each space can be adjusted. You can control the time it takes for the chemical to degas.

As shown in FIG. 1, the chemical supply unit 140 is connected to a chemical storage tank 141 in which hypochlorous acid-based chemicals are stored, and is connected to the chemical storage tank 141 to receive the stored chemical and the ammonia single-axis degassing tank 120. Sewage water and hypochlorous acid are connected to the sewage water supply pipe 125, which supplies sewage water to the sewage inlet 121, through the chemical supply pipe 143, and are transported while discharging a set amount of hypochlorous acid-based chemicals into the inside of the sewage water supply pipe 125. It may include a chemical pump 142 that allows the chemical series to flow into the sewage inlet 121 in a mixed form.

Therefore, the time required for stirring wastewater and hypochlorous acid-based chemicals within the ammonia single-axis degassing tank 120 can be significantly reduced, and the efficiency of the ammonia degassing reaction within the ammonia single-axis degassing device 100 can be maximized.

Meanwhile, the ammonia single-axis degassing device 100 according to a preferred embodiment of the present invention uses the ammonia sensor 600 and the control unit 700 in real time according to the ammonia content contained in the wastewater flowing into the water treatment chamber 110. Ammonia can be efficiently removed by controlling the amount of hypochlorous acid-based chemicals.

For this purpose, the ammonia sensor 600 is disposed inside the organic matter oxidation tank 130, detects the ammonia component, and outputs an ammonia detection value. The control unit 700 is signal-connected to the chemical pump 142 and controls the drive to control the amount of hypochlorous acid-based chemical discharged from the chemical pump 142, and the ammonia detection value received from the ammonia sensor 600 is If it exceeds the set appropriate standard, the emission of hypochlorous acid-based chemicals increases, and if it falls below the set appropriate standard, the emission of hypochlorous acid-based chemicals is controlled to decrease.

Therefore, even if the ammonia content contained in the wastewater flowing into the water treatment chamber 110 changes, it can be automatically adjusted so that an appropriate amount of hypochlorous acid-based chemicals is injected in real time, so the amount of hypochlorous acid-based chemicals input is adjusted to the breakthrough point before the chlorine input step. By converting it into a chloramine component and degassing it, the amount of hypochlorous acid-based chemicals used can be significantly reduced.

Meanwhile, in addition to ammonia and organic matter, wastewater may contain suspended substances such as floc. In the ammonia single-axis degassing device 100 according to a preferred embodiment of the present invention, the suspended substances contained in wastewater are removed by floating them on the water surface. The separation device 400 is provided to pre-treat the wastewater to remove suspended solids before removing ammonia and organic matter, that is, before inputting the wastewater into the water treatment chamber 110.

For this purpose, as shown in FIG. 3, the multi-stage partition type floating separation device 400 is formed with a watertight internal space, a wastewater inlet 412 through which sewage water flows is formed on one side, and treated wastewater is discharged on the other side. A treated water outlet 413 is formed, and in the internal space, a plurality of lower partitions 414 extending upward from the floor and a plurality of upper partitions 415 extending downward from the ceiling are alternately arranged to form a plurality of bubble reaction tanks. It includes a reaction chamber 410 forming 416 and a bubble generator 420 (see FIG. 1) that generates micro- or nano-sized microbubbles and supplies them to the internal space.

Here, the multi-stage partition type flotation separator 400 restricts the temporary outflow of air bubbles step by step through a partition wall structure installed in multi-stage with respect to the flow direction of the lower part, thereby maintaining the saturated bubble state and removing the floating particles. By removing it, not only can purification be done in a short time, but suspended solids contained in the treated water and discharged can be minimized.

As shown in FIG. 3, the reaction chamber 410 of the multi-stage partition type flotation separator 400 is a chamber that provides a reaction space for floating and removing suspended solids contained in the wastewater while the wastewater and fine bubbles are supplied inside. As such, a predetermined internal space is formed where floating separation takes place, and wastewater is supplied to the internal space through the wastewater inlet 412, and purified wastewater is discharged to the outside through the treated water discharge port 413 disposed on the other side.

In addition, in the drawing, four bubble reaction tanks 416 are formed by a partition structure in which three lower partitions 414 and three upper partitions 415 are alternately arranged with respect to the flow direction of the wastewater within the reaction chamber 410. Although this is an example, it is not limited to this, and it is of course possible to form three or more bubble reaction tanks or more than five bubble reaction tanks in consideration of purification efficiency according to the concentration of suspended solids contained in wastewater and the amount of fine bubbles supplied.

In addition, the wastewater flowing in through the wastewater inlet 412 may contain suspended solids of a size that do not float due to fine bubbles. Typically, suspended solids of this size settle to the bottom in the form of sludge over time. may not be discharged to the outside. For this purpose, an outlet 418 is formed at the bottom of each bubble reaction tank 416 to discharge the settled sediment. Here, in order to smoothly remove sludge, slopes sloping downward at a predetermined angle (for example, 45 degrees) are formed on both sides of the outlet 418 to enable rapid discharge of sludge through the outlet 418. .

The multi-stage partition type flotation separator 400 is disposed on the upper part of the reaction chamber 410 and rotates a rotating chain 432 equipped with a plurality of skimmers 431 on the outer surface of the sewage and wastewater by the fine bubbles. It is provided with a flotation sludge discharge unit 430 that scrapes off the flotation sludge floating on the surface of the water and discharges it to a treated water discharge port 413 disposed at the top of the reaction chamber 410. Here, the rotating chain 432 is connected in the form of an endless track between the rotating rolls 433 spaced apart on both sides of the reaction chamber 410, and the rotating roll 433 receives a control signal from the control unit 700. A drive motor (not shown) that rotates along the axis is connected, and the skimmer 431 can be rotated circularly using the rotational force of the drive motor.

As shown in the figure, a microbubble inlet 421 is formed on one side of the reaction chamber 410 for injecting microbubbles generated by the bubble generator 420 into the internal space, and on the other side, each bubble reaction tank 416 is formed. ) A treated water supply port 424 is formed to discharge a portion of the treated water that passes through the treated water and moves toward the treated water discharge port 413, and the bubble generator 420 has a treated water supply port 424 and a fine bubble inlet ( 421), which is disposed on a transfer line connected between the two to generate microbubbles in the supplied treated water and discharge the generated microbubbles into the microbubble inlet 421.

This multi-stage partition-type flotation separator (400) can effectively remove suspended solids particles contained in sewage and wastewater, and through this, wastewater with suspended solids removed can be supplied to the ammonia single-stage degassing tank (120) to remove ammonia. The purification efficiency using toothpaste can be maximized in the base tank 120 and the organic material oxidation tank 130.

In addition, as shown in FIG. 1, the ammonia single-axis degassing tank 120 is disposed at the rear end of the multi-stage partition-type floating separator 400 and is connected to the sewage inlet of the ammonia single-axis degassing tank 120 through the wastewater supply pipe 125. (121) is connected to the treated water outlet 413 of the reaction chamber 410, and the treated wastewater is supplied by the multi-diaphragm floating separator 400, thereby effectively removing the ammonia component of the wastewater pretreated with hypochlorous acid-based chemicals. It can be purified within a short period of time and suspended solids contained in the treated water and discharged can be minimized.

Meanwhile, the ammonia single-axis degassing device 100 according to a preferred embodiment of the present invention is further equipped with a high-speed flocculation device 200 and a non-powered flux flocculation device 300 in addition to the multi-stage partition type floating separation device 400 described above. The suspended solids separated in the flotation separator 400 can be coagulated more efficiently in advance.

The high-speed flocculation device 200 replaces the function of the conventional rapid agitation tank by causing the inflow wastewater and coagulant to swirl inside, thereby completely dissolving the coagulant and maximizing the coagulation efficiency between the dissolved coagulant and suspended solids in the wastewater within a short period of time. It is a purification device for

As shown in FIG. 1, the high-speed flocculation device 200 has a sewage water inlet connected to the flow rate adjustment tank 10 in which sewage water to be purified is stored, and a wastewater discharge port connected to the wastewater inlet side of the non-powered flocculation device 300. is equipped with a stirring blade for stirring the supplied wastewater and coagulant.

As shown in Figures 1 and 4, the non-powered floc flocculation device 300 consists of a plurality of flocculation tanks 321 divided into upper and lower sections inside the flocculation chamber 310 to replace the function of a conventional mechanical slow stirring tank. It is partitioned and the wastewater from each flocculation tank 321 flows into the interior of the adjacent flocculation tank 321 arranged at the bottom due to a drop, thereby creating a circulating water flow, thereby removing the fine particles contained in the wastewater without any separate stirring power. Suspended substances are circulated internally by water currents and come into contact with each other to condense to a certain size.

For this purpose, as shown in the drawing, a watertight internal space is formed, a sewage water inlet 311 connected to the wastewater discharge port of the high-speed coagulation device 200 is formed at the upper part, and a flocculation chamber 310 is formed with a wastewater discharge port 312 at the lower part. and a partition wall 320 disposed laterally inside the coagulation chamber 310, dividing the internal space into a plurality of coagulation tanks 321 divided into upper and lower sections, and having communication holes 322 opening upward and downward in the central portion. And, it includes a turbulence prevention plate 330 horizontally disposed at a lower position of each communication hole 322.

Here, the flocculation chamber 310 is formed as a sealed tank type to prevent the odor of the inflow sewage water from leaking to the outside, and is made of a material with excellent corrosion resistance and wear resistance, such as suture.

In addition, the drawing illustrates that three flocculation tanks 321 are formed inside the chamber by two partition walls 320, but one or three or more partition walls 320 are arranged to form two or four or more flocculation tanks 321. may form. Sewage water flowing into the wastewater inlet 311 disposed at the top of the flocculation chamber 310 flows into the first flocculation tank 321 partitioned by the first partition 320, and the inflow wastewater flows into the second flocculation tank 321 through the communication hole 322. It is discharged to the flocculation tank 321, and the wastewater flowing into the second flocculation tank 321 is discharged to the third flocculation tank 321 through the communication hole 322 and finally the sewage wastewater discharge formed at the bottom of the flocculation chamber 310 ( 312) and is discharged to the outside.

In this way, as it is designed as a multi-stage coagulation structure in which wastewater flows in and discharges from the upper part, the wastewater flowing into the upper part of each coagulation tank through the wastewater inlet 311 or the communication hole 322 is directed downward by a drop at the central position. A falling wastewater flow is formed, and the wastewater that falls and comes in contact with the bottom surface of each flocculation tank 321 moves along the bottom surface and touches the inner wall of the flocculation tank 321 as it moves, creating a rising water flow that rises along the wall. By forming, a circulating water flow is created on both sides of the center of each flocculation tank 321.

Accordingly, the suspended solids contained in the wastewater introduced from the outside can be coagulated to form a lump larger than the size at the time of introduction by circulating together and contacting each other by the circulating water flow generated in the first coagulation tank 321, and the flocculated The suspended solids become larger in size as they pass through the second flocculation tank 321 and the third flocculation tank 321.

Here, as shown in the drawing, an inclined portion 331 is formed around the end of the turbulence prevention plate 330 in a shape that gradually increases toward the outside, so that the inflowing wastewater is prevented from stagnating on the turbulence prevention plate 330. The time can be increased, and the drop width can be increased to further increase the cohesion efficiency.

In addition, an inclined surface 323 is formed around the end of the partition wall 320 in a shape that gradually slopes upward toward the outside, or the partition wall 320 is formed in a shape that gradually slopes upward from the center to the outside. The sludge can be guided to move toward the communication hole 322 without stagnating on the upper surface of the partition wall 320.

In addition, a pressure regulator pipe 340 is disposed at the top of the coagulation chamber 310 to discharge air in the internal space to the outside, and the control unit 700 controls the coagulation chamber according to the pressure detection signal from the pressure sensor 341. When the internal pressure of 310 exceeds the set value, the pressure regulating pipe 340 is driven and controlled to maintain the set value.

In addition, the sewage water discharge port 312 and the sewage inlet 4121 of the multi-stage partition type floating separator 400 are connected to the sewage water discharge pipe 360, and the sewage water discharge pipe 360 is connected to the sewage water discharge pipe 360, which discharges the wastewater discharge from the lower discharge port 312. A curved bent portion is formed at a position opposite to the discharge direction of the wastewater, thereby minimizing the separation of the agglomerated substances contained in the wastewater by hitting the inner wall of the wastewater discharge pipe 360 while being discharged through the wastewater discharge port 312. can do.

By using the high-speed flocculation device (200) and the non-powered flux flocculation device (300), suspended solids can be coagulated within a short time to the extent that they can be floated by fine bubbles in the multi-diaphragm type flotation separator (400). By increasing the flotation efficiency, the purified treated water can be discharged to the outside to minimize suspended solids.

As described above, in the water treatment system according to the preferred embodiment of the present invention, the high-speed flocculation device 200, the non-powered floc flocculation device 300, and the scum skimmer 400 are arranged in stages along the treatment and transport direction of the wastewater to perform high-speed coagulation. Through the device 200 and the non-powered flux flocculation device 300, suspended substances can be flocculated within a short time to the extent that they can be levitated by fine bubbles through the scum skimmer 400, and the flotation efficiency is increased by fine bubbles. Treated water that has been purified to minimize substances can be discharged to the outside.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the claims to be described.

100...Ammonia single-axis degassing device
110...water treatment chamber 111...compartment wall
120... Ammonia single-axis degassing tank 121... Sewage water inlet
122...First bulkhead 123...Second bulkhead
124... first exhaust port 130... organic matter oxidation tank
131...treated water outlet 132...third bulkhead
133...2nd exhaust port 140...chemical supply unit
141...chemical storage tank 142...chemical pump
151a, 151b... degassing tank diffuser 152... oxidizing tank diffuser
153... blower 200... high-speed flocculation device
300...non-powered flux flocculation device 400...multi-stage partition type flotation separation device
600... Ammonia sensor 700... Control unit

Claims (7)

A multi-stage partition-type flotation separation device (400) that removes suspended solids contained in wastewater by floating them on the water surface; and
A watertight internal space is formed and divided into an ammonia single-axis degassing tank 120 and an organic matter oxidation tank 130 by a partition wall 111 extending upward from the bottom of the inner space, and the ammonia single-axis degassing tank 120 has a multi-stage A sewage water inlet 121 through which wastewater from which suspended substances have been removed is supplied by the partition-type flotation separator 400 is formed at the lower position, and the organic matter oxidation tank 130 has a treated water outlet 131 through which treated wastewater is discharged. An ammonia single axis degassing device 100 including a formed water treatment chamber 110 and a chemical supply unit 140 that supplies hypochlorous acid-based chemicals used to degas the ammonia contained in wastewater to the water treatment chamber 110. And
The ammonia single-axis degassing tank 120 has a plurality of degassing diffuser pipes 151a and 151b that form bubbles with air supplied from the blower 153 so that the wastewater and chemicals supplied from the sewage inlet 121 are agitated with each other. It is provided so that the ammonia component contained in the wastewater is removed through a degassing reaction with the hypochlorous acid-based component of the drug,
The organic matter oxidation tank 130 has an oxidation tank diffuser 152 that forms bubbles with air supplied from the blower 153 so that the wastewater flowing in from the ammonia single-axis degassing tank 120 is agitated while overflowing the partition wall 111. It is provided inside to remove organic matter and E. coli contained in the wastewater through an oxidation reaction with the hypochlorous acid-based components remaining in the wastewater.
Inside the ammonia single-axis degassing tank 120, a first partition wall 122 is provided between the wastewater inlet 121 and the partition wall 111, which extends upward from the floor and guides the wastewater flowing into the lower part to rise, The first degassing tank diffuser (151a) is disposed at the lower position between the sewage inlet (121) and the first partition wall (122) and discharges bubbles upward, and the sewage inlet (121) is connected to the ammonia single-axis degassing tank (120). is formed to open laterally at the lower position to supply wastewater toward the first degassing tank diffuser (151a),
The partition wall 111 extends upward so that its upper end is located at a relatively higher position than the top of the first partition wall 122,
A control unit 700 that adjusts the residence time of wastewater in the ammonia single-stage degassing tank 120 and the organic matter oxidation tank 130 by controlling the inflow amount of wastewater supplied from the multi-stage partition type flotation separator 400; Contains more,
A first exhaust port 124 is provided at the top of the ammonia single-axis degassing tank 120, so that ammonia gas generated inside is discharged to the outside through the first exhaust port 124 and is removed from the wastewater, and the organic matter oxidation tank 130 A second exhaust port 133 is provided at the upper part, so that by-product gas containing residual ammonia gas and carbon dioxide generated inside is discharged to the outside and removed from the wastewater,
Inside the ammonia single-axis degassing tank 120, a second partition extends downward from the ceiling between the first partition 122 and the partition wall 111 and guides the wastewater that has overflowed the first partition 122 to descend. 123) is further provided, and the second degassing diffuser 151b is disposed at a lower position between the first partition 122 and the second partition 123 to discharge air bubbles upward toward the descending wastewater,
The interior of the organic material oxidation tank 130 is further provided with a third partition wall 132 that extends downward from the ceiling surface and guides the wastewater that has overflowed the partition wall 111 to flow downward and into the lower part of the organic material oxidation tank 130. The oxidation orogen diffuser 152 is disposed at a lower position between the third partition 132 and the treated water outlet 131 and discharges bubbles upward,
The control unit 700 operates the blower 153 to adjust the amount of bubbles or the bubble supply pressure discharged from the diffusers 151a, 151b, and 152 provided in the ammonia single-axis degassing tank 120 and the organic matter oxidation tank 130, respectively. Controls the rotation timing and rotation speed of
The chemical supply unit 140 is connected to a chemical storage tank 141 in which hypochlorous acid-based chemicals are stored, and is connected to the chemical storage tank 141 to receive stored chemicals and is connected to the sewage inlet 121 of the ammonia single-axis degassing tank 120. It is connected to the sewage water supply pipe 125, which supplies sewage water, through the chemical supply pipe 143, and discharges a set amount of hypochlorous acid-based chemicals into the interior of the sewage water supply pipe 125, in a mixed form of the transported wastewater and hypochlorous acid-based chemicals. It includes a chemical pump (142) that allows the chemical to flow into the sewage inlet (121),
The control unit 700 is signal-connected to the chemical pump 142 and controls the operation to control the amount of hypochlorous acid-based chemicals discharged from the chemical pump 142.
delete delete delete delete In claim 1,
It further includes an ammonia sensor 600 that is disposed inside the organic matter oxidation tank 130 and detects the ammonia component and outputs an ammonia detection value,
The control unit 700 is signal-connected to the chemical pump 142 and controls the drive to adjust the amount of hypochlorous acid-based chemical discharged from the chemical pump 142, and the ammonia detection value received from the ammonia sensor 600 is set. A water treatment system characterized in that it is controlled so that the discharge of hypochlorous acid-based chemicals increases when the appropriate standard is exceeded, and the discharge of hypochlorous acid-based chemicals decreases when it falls below the set appropriate standard.
In claim 1,
The multi-stage partition type floating separation device 400,
A watertight internal space is formed, and on one side, a sewage water inlet 412 through which sewage water flows in is formed, and on the other side, a treated water outlet 413 through which treated sewage water is discharged is formed, and in the inner space, a plurality of devices extending upward from the floor are formed. A reaction chamber 410 in which a lower partition 414 and a plurality of upper partitions 415 extending downward from the ceiling are alternately arranged to form a plurality of bubble reaction tanks 416 and generate micro- or nano-sized fine bubbles. It includes a bubble generator 420 supplied to the internal space,
The ammonia single-axis degassing tank 120,
It is disposed at the rear end of the multi-stage partition type flotation separator 400, and the sewage inlet 121 of the ammonia single-axis degassing tank 120 is connected to the treated water outlet 413 of the reaction chamber 410 through the wastewater supply pipe 125. A water treatment system in which treated wastewater is supplied by a multi-stage partition-type flotation separator (400).