KR20180013257A - Apparatus of advanced wastewater treatment - Google Patents

Abstract

An advanced water treatment device for treating wastewater in a large volume and a high concentration according to the present invention comprises: a water collecting tank which collects wastewater introduced through a screen for filtering floating materials by a predetermined amount; a primary biological treatment tank which treats wastewater transferred through the water collecting tank by passing the wastewater through an aerotropic container for performing nitrification under the supplying of air, then a complex reaction container for performing a complex reaction of an anoxic tank, an anaerobic tank and a settling tank; a secondary biological treatment tank which re-treats middle treatment water passed through the primary biological treatment tank through the aerotropic container and the complex reaction container; a chemical treatment tank which uses chemicals to treat the treatment water treated through the secondary biological treatment tank; a filtration treatment tank which filters and treats the treatment water passed through the chemical treatment tank and discharges the same; and a concentrating treatment tank which concentrates and treats sludge generated from the primary and secondary biological treatment tanks and the chemical treatment tank. The present invention having such configuration can treat wastewater regardless of a volume and a concentration of discharged wastewater, thereby enabling a consistent and continuous operation in four seasons, and accordingly generating economic benefits such as the reduction in operating and maintenance costs.

Description

[0001] Apparatus of advanced wastewater treatment for high-capacity and high concentration wastewater treatment [

The present invention relates to an advanced water treatment apparatus, and more particularly, to an advanced water treatment apparatus for treating a large amount or a high concentration of an aqua water by operating a plurality of aerobic and complex reactors through a change of the entire apparatus, The present invention relates to an advanced water treatment apparatus for wastewater treatment.

Generally, sewage and wastewater contain nitrogen or phosphorus. Nitrogen and phosphorus are mainly generated from agricultural fertilizers, manure or livestock manure, synthetic detergents, etc., and are treated with nitrogen or phosphorus. When wastewater is introduced into rivers or dams, the eutrophication causes coastal red tides, ammonia fish toxins, and dissolved oxygen in the water.

As a result, the Ministry of Environment has expanded the emission allowance standards for nitrogen and phosphorus annually. Examples of the biological nitrogen and phosphorus removal processes of the system for removing nitrogen and phosphorus from sewage or wastewater include an aerobic reactor (or an aeration tank) as an activated sludge process, an anaerobic reactor, and an anaerobic reactor In the aerobic reactor, nitrification and nitrification are generally effected by nitrification. In an anaerobic reactor, denitrification is carried out to release nitrogen gas to the atmosphere. .

Therefore, it is required that sufficient oxygen is supplied to the aerobic tank, and that the supplied air is well mixed with the wastewater and microorganisms. In addition, the treatment in a single reaction tank is an intermittent abandonment method in which nitrification and denitrification are repeated alternately at intervals of time.

. Therefore, there is a problem that the process and apparatus are complicated and operation management is difficult.

In addition, a chemical method has been employed in which a metal ion salt is added to sewage to cause a combination of phosphorus and metal ions contained in sewage and waste water, and the precipitate is separated and removed. However, the chemical treatment method requires professional skills to be managed by a professional manager at a full time, and it is not only expensive but also causes a secondary contamination problem.

In addition, due to the development of industry, high concentration of polluted water is generated in the mass production system of livestock, etc., and a large amount of polluted water is discharged from the fish processing factory, and the high-level treatment, namely, nitrogen and phosphorus removal There are many summer seasons.

Korean Patent Publication No. 10-20150095390, published on Aug. 20, 2015. Korean Registered Patent No. 10-0453806, October 12, 2004. Korean Registered Patent No. 10-1214371, December 14, 2012 Registered Person.

Accordingly, in order to solve this problem, the present invention operates a plurality of aerobic tanks and a plurality of complex tanks, and it is possible to treat the large-capacity and high-concentration polluted water regardless of the load And an object of the present invention is to provide an advanced water treatment apparatus of large capacity and high concentration wastewater.

The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description

According to an aspect of the present invention, there is provided an elevation water treatment apparatus for treating a large amount of polluted water and a high concentration of polluted water, comprising: a water collecting tank for collecting a predetermined amount of polluted water flowing through a screen for filtering suspended substances; A primary biological treatment tank for treating the polluted water through a complex reaction tank that performs a combined reaction of an anoxic tank, an anaerobic tank, and a settling tank through an aerobic tank that performs nitrification reaction with polluted water delivered through the water collecting tank; A second biological treatment tank for re-treating intermediate treatment water through the primary biological treatment tank through an aerobic tank and a complex reaction tank; A chemical treatment tank for treating the treated water treated through the secondary biological treatment tank with chemicals; A filtration treatment tank for filtering and discharging the treated water through the chemical treatment tank; and a concentration treatment tank for concentrating the sludge generated in the first biological treatment, the second biological treatment, and the chemical treatment tank. .

Preferably, an oil separation tank is provided in front of the water collecting tank, and a drum screen is further installed between the water collecting tank and the primary biological treatment tank.

The primary biological treatment tank includes a flow rate adjusting tank for adjusting the concentration and amount of the inflowing polluted water; A first aerobic tank for partially oxidizing the organic material to supply the carbon source; A second aquarium for performing the nitrification reaction of the organic matter; And a first complex reaction tank for performing a combined function of an anoxic tank, an anaerobic tank, and a settling tank for an elevation treatment for removing nitrogen and phosphorus, and the contaminated water delivered from the flow rate adjusting tank is supplied to a first aerobic tank and a second aerobic tank Respectively, at a ratio of 2: 8.

The first complex reaction tank is provided with a plurality of partition walls which are sloped downward on the inner wall and have an inner passage formed on the upper side of the center, a scraper on the lower side of the rotating central shaft passing through the center of the inner cylinder, And the contaminated water having passed through the aerobic tank is gravity-regulated downwardly from the upward direction of the inner tube and is transmitted to the bottom surface of the outer tube in a state where the flow rate is reduced by the multi- The sludge is accumulated on the lower surface, and the separated water is conveyed upward from the bottom of the outer tube, so that the treated water is treated by the rotating bar. And a combined reaction inflow tank for collecting and mixing the treated water discharged from the first aquarium and the second aeration tank is further installed in front of the first composite reaction tank.

More preferably, the second biological treatment tank includes an aerobic tank inlet tank for receiving treated water treated in the first complex tank and performing a role of a reserve tank; An aerobic tank for performing a nitrification action and internally returning a predetermined amount of microorganisms to the aerobic tank inflow tank; And a second complex reaction tank for performing a combined function of an anoxic tank, an anaerobic tank, and a settling tank for an elevation process for removing nitrogen and phosphorus, wherein the chemical treatment tank receives the treated water of the second complex reaction tank, A chemical reaction inlet vessel; A chemical reaction tank in which a chemical chemical is introduced to perform a chemical treatment; And a settling tank for settling the solid matter generated after the treatment in the chemical reaction tank.

The filtration treatment tank includes: a sponge filtration water tank for preliminarily storing treated water subjected to chemical treatment; A sponge filtration member consisting of a sponge filtration member in which sponge filter media and activated carbon are physically treated and a sponge filtration filter in which water and air are mixed so as to clean the sponge filter media member and sprayed backward; And an effluent tank for discharging the finally treated treated water to the outside or returning it to the flow rate adjusting tank.

A concentrating tank for concentrating the sludge transferred from the combined reaction tank and the chemical precipitation tank and transferring a part of the sludge to a material for supplying the carbon source of the first aeration tank and the microsphere MLSS of the second aeration tank; A secondary concentration tank for further concentrating the concentrated sludge transferred from the primary concentration tank; And a sludge dehydrator for dehydrating the concentrated sludge in the second concentration tank.

According to the present invention,

Since the treatment can be performed irrespective of the volume and concentration of polluted water to be discharged, it is possible to perform continuous operation continuously for all four seasons.

In addition, it can be operated under harsh environmental conditions, and each part can be manufactured compactly. Therefore, it is possible to manufacture and sell the whole water treatment system easily, and it is possible to assemble and assemble the whole facilities. There are other effects that can be operated without.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an entire system of an advanced water treatment apparatus for treating a large amount and high concentration polluted water according to a preferred embodiment of the present invention. FIG.

Since the present invention is basically an apparatus for treating wastewater of a large capacity and a high concentration, it can not be treated by a single aerobic anaerobic tank and a complex reaction tank in the conventional biological treatment apparatus. Therefore, a plurality of reaction tanks are modified, It is possible to process without influence.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of an advanced water treatment system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the figure, the present invention is largely composed of a primary biological treatment, a secondary biological treatment, and a chemical treatment in the order of filtration and concentration treatment. That is, since it is easy to see that the size of each reaction tank is not smoothly treated, it is well known in the experiment and current operating system of the present inventors. Therefore, the treatment of polluted water such as nitrification, denitrification, It can be seen that it is effective to operate.

Fig. 1 illustrates the treatment of polluted water discharged at a large scale in a meat processing factory.

First, the contaminated water flows into the fish meat processing plant, and the contaminated water passes through the screen 100 and the oil water separator 200. The screen 100 and the oil water separator 200 correspond to the civil works and can be referred to as a preliminary operation. That is, the screen 100 not only prevents large particles such as wastes of a screen (50 mm or more) and a screen (more than 20 mm) from being damaged, thereby preventing damage to the machinery and equipment of subsequent processes Thereby reducing the size of the biological tank and reducing the amount of sludge generated. The oil-water separator 200 removes the oil contained in the polluted water so that the processing function performed in the post-process is smoothly maintained. There are various methods for separating the oil contained in the wastewater from the water. However, in this embodiment, the oil is separated by using the difference in specific gravity and density of the oil.

The next water collecting tank 300 is provided. The water collecting tank 300 collects the polluted water separated from the oil in the oil water separator 200 and collects the contaminated water to a certain extent before treating the polluted water. Then, the drum screen 400 is passed according to the state of the contaminated water before the subsequent contaminated water treatment. This is for filtering out fine suspended substances and SS which have not been separated from the screen 100 at the previous stage according to the state of a pollutant source. Through this work, the burden of biological treatment can be reduced and continuous operation is possible. The drum screen 400 is cleaned from time to time to maintain cleanliness.

Next, let us explain the first biological treatment. The primary biological treatment is to control the load adjustment and the degree of contamination of each pollutant as a preliminary step for the complete treatment of the contaminated water through the subsequent secondary biological treatment. The constitution is composed of the flow control tank 500, 600, a second aquarium tank 700, a combined reaction inflow tank 800, and a first complex reaction tank 900.

The flow rate adjusting tank 500 makes the concentration and amount of the incoming water quality uniform and allows the process to be introduced into the downstream process. In this flow rate control tank 500, an air supply device (aeration pipe) is installed so as not to equalize the polluted water, remove gas, and dead space at the bottom. By supplying the air from time to time through such an air diffuser, it is possible to carry out the faithful role of the flow rate regulator 500, and also to provide the oxygen supply to the aerodrome at the rear stage.

The oxic tank 600 or 700 will be described. The nitrification reaction plays a role in the aerobic tank, but in the present invention, it is constituted to perform the double action of the nitrification action and the supplying function of the carbon source for the downstream denitrification. To this end, a first oxic tank 600 for performing a carbon source supply function and a second oxic tank 700 for performing a nitrification reaction are provided. The contaminated water supplied from the flow rate control tank 500 may be supplied to the first aquarium 600 and the second aquarium 700 at about 2: 8 so that the above reaction can be performed. Since the main purpose of the first denitration reactor 600 is to supply the carbon source of the denitrification at the downstream end, the concentration of the microorganisms is adjusted so that decomposition of organic matter and partial oxidation of ammonia nitrogen are performed, and when an air supply device and a mixer are installed It will suffice.

The second aquarium 700 causes the organic matter and the ammonia nitrogen to be completely oxidized and cause an excessive intake of phosphorus by the spider organism. For this purpose, an air supply device is installed, but a large amount of microorganisms is required, so that the microorganism contact device 710 is installed. The microorganism contact device 710 collectively supports the microorganisms on a carrier such as a sponge and allows the contact device 710 to be installed in the body of the second aquarium 700. As the microbial contact device 710 is installed, the air supplied from the lower part to the upper part stays in the contact device for a long time, which not only induces vigorous activity of the microorganisms, but also has an advantage of lowering the outflow of air to the outside.

Next, after the work is performed in these aerobic tank 600, 700, it is mixed sufficiently in the combined reaction inlet tank 800. That is, the carbon-nutrient supply water discharged from the first oxic tank 600 and the nitrification nitric oxide discharged from the second oxic tank 700 are mixed and supplied in advance.

The first complex reaction tank 900 will be described. The complex reaction tank 900 is a reaction tank that performs the three main roles of the anaerobic tank, the anoxic tank and the settling tank, which are the basic reaction bases of the biological advanced treatment for removing the existing nitrogen and phosphorus, and is a process for removing nitrogen and phosphorus. By using such a complex reaction tank 900, the conventional three kinds of solutions can be solved in one set, which enables more economical operation. The first complex reaction tank 900 has the following structure in order to perform three functions.

Finally, the lower part of the sludge and the upper part are made of the double structure of the inner tube 910 and the outer tube 920 so as to be separated into the treated water, so that the intermediate treatment water is basically injected into the inner tube 910 located at the center, , The sludge is settled in the lower part flowing down and moved to the upper part of the intermediate treatment water, so that the microorganism treatment is performed. At this time, the partition wall is slanted downwardly on the wall surface of the inner cylinder 910 so that the intermediate treatment water flows slowly, and the outer cylinder 920 has a double structure of a scraper 922 and a rotating bar 524 Respectively. The water flow is first transmitted from the outside to the inner cylinder 910 side, and the transferred water is slowed down through the multi-stage partition wall so as to flow slowly, so that the solid-liquid separation can be sufficiently performed in the lower portion. The sludge is accumulated at the bottom and the separated water is moved to the upper layer by the wall of the outer tube. At this time, the scraper 922 and the rotating bar 924 of the outer tube are configured to move slowly or simultaneously at different speeds, since the scraper 922 slowly stirs and distributes the sludge evenly, 924) to remove residual nitrogen in water. That is, microbes are filled in the inside of the rotating bar 924, so that the water is contacted with the stirring bar 924 which is being stirred, so that the nitrogen can be removed. Therefore, the sludge is dispersed by the partition wall structure of the inner cylinder 910 as a whole, and nitrogen is more effectively removed from the lower and middle layers by the rising of the upwardly directed water to the outer cylinder 920 side, so that the solid-liquid separation can be performed. A portion of the sludge accumulated in the lower portion is supplied to the first and second oxic tank 600 and 700 to maintain the MLSS of the oxic tank, and the remaining sludge is sent to the thickening tank to be described later. On the other hand, in the existing process, there is a disadvantage in that the inner tank is transported from the aerobic tank to the anoxic tank for denitrification, resulting in large size and high efficiency and maintenance cost. However, in this complex tank, There is an advantage that it is easy.

Next, the second biological treatment process will be described. The aerobic tank 1100, and the second complex reaction tank 1200 for the secondary biological treatment. That is, the biological treatment is smoothly performed through the exhalation process and the complex reaction.

The oxic tank inlet tank 1000 serves to supply the treated water introduced from the first composite reaction tank 900 to the oxic tank 1100, which will be described later, and a reserve tank for fully activating the microorganisms by increasing the depth of the tank.

The oxic tank 1100 carries out the exchange and oxidation of the original function of the organic matter and the ammonia nitrogen into the nitrite nitrogen. The reason for driving the oxic tank again is to treat Fe and ABS which have not been treated in the first and second oxic tank But also to induce excessive intake of phosphorus in the microorganism by allowing it to pass through the aerobic tank again. This also requires an air supply device for computerization, and a large amount of microorganisms is required, so that a microorganism contact device of the same type as that of the second aeration tank is installed. In addition, internal transfer is performed from the oxic tank 1100 to the oxic tank inlet tank 1000 so that some denitrification occurs in the oxic tank inlet tank 1000.

Next, the second complex reaction tank 1200 will be described. The basic structure is similar to the above-described first complex reaction tank 900, but a little different in its role. That is, since a large amount of sludge is removed in the first complex reaction tank, it is preferable that the anaerobic reaction and the anaerobic reaction occur mainly in the second complex reaction tank 1200. For this purpose, it is sufficient to carry more microorganisms to the outer barrel and to rotate the bar at a faster speed, and such adjustments may be adjusted according to the condition of the incoming process water.

The chemical treatment process will be described. The chemical treatment process includes a chemical reaction inflow tank 2000, a chemical reaction tank 2100, and a settling tank 2200. These chemical treatments are intended to treat unprocessed materials in the biological treatment and may require the application of basic chemical treatments. However, since large-volume treatment is required, the chemical reaction inlet tank (2000) serves as a reservoir for extending water depth. The chemical used in the chemical reaction tank 2100 is the same, but it is possible to process all of the same as one reaction tank to maximize the economical efficiency and to install the stirring device in order to maximize the reaction between the contaminant and the inorganic coagulant. The sedimentation tank 2200 is used for solid-liquid separation of FLOC generated in the chemical reaction tank 2100. Basically, the sedimentation tank 2200 has an inner passage structure similar to the complex reaction tank 900 described above, Liquid separation is performed. And a scraper is installed in the lower part of the outer cylinder to collect the sludge to be precipitated. However, since the anoxic reaction anaerobic reaction and the like are not necessary as in the complex reaction tank 900, the configuration of the rotary bar is not required, and the sludge to be settled is to be discarded, so that it may be sufficient to transfer the sludge to the second concentrator described later.

Hereinafter, the filtration process will be described. The filtration process includes a sponge filtration water tank 3000, a sponge filtration tank 3100, and a discharge tank 3200. This is made up of a wastewater treatment water filtration device using sponge filter media for treatment of extra SS, organic matter, nitrogen and phosphorus. To this end, the sponge filtration tank 3000 firstly stores the treated water. The sponge filtration tank (WWAY) 3100 is a solid-liquid separator for treating PO4, SS, NH4, Fe, surfactants, and other organic substances as a final device for treating untreated biological and chemical treatments. The sponge filter material is compressed and the activated carbon is filled in the rear end of the sponge filter material. Therefore, the solid-phase components are adsorbed while passing through the compressed sponge filter media, and then the activated carbon is finally passed through to remove the contaminants. The finalized water of such pollutants is converted into water suitable for environmental standards and is sent to the effluent tank 3200.

Meanwhile, after a predetermined time, the sponge filtration tank (wway) 3100 is backwashed from the bottom to the top so as to be washed so as to prevent clogging and the like. Not only the washing of the filtration apparatus through the backwash, but also the internal pollutants are desorbed by the backwash water, and the generated polluted water and the residual water are sent to the first concentrating tank or the flow rate adjusting tank described later. The backwash water used for the backwash washing is not required to contain any water because it is sufficient to use the water stored in the sponge filtering water tank 3000. The treated water after the above-mentioned process is sent to the discharge tank 3200 since all the environmental pollutants have been removed. It may be discharged to the outside as it is collected in the discharge tank 3200, used for washing the above-mentioned drum screen, or used as water for internal supply.

Hereinafter, the concentration process will be described. The concentrating process is mainly for treating the sludge generated in the first complex reaction tank 900 and the second complex reaction tank 1200 and includes a first concentrating tank 4000, a second concentrating tank 4100, (4200).

First, the primary concentration tank 4000 collects and concentrates the sludge generated in the complex reaction tanks 900 and 1200 and the reverse water generated in the sponge filtration tank 3100. Since many microorganisms remain in the sponge filtration tank 3100, it is used in the first concentration tank to recycle it. In the concentration tank, the concentrated sludge is sent to the second concentration tank 4100, (S) and the microsphere MLSS of the second aquifer (s). Then, the supernatant is sent to the flow control tank () so that the entire flow rate is adjusted.

Then, the sludge generated in the concentrated sludge and the chemical precipitation tank () is collected and concentrated in the first concentration tank 4000 of the second concentration tank 4100, and the supernatant is sent to the flow rate control tank. Since the concentrated sludge in the concentrating tank 4100 is to be discarded, a dehydrating coagulant may be administered to facilitate dehydration if necessary.

The sludge dehydrator 4200 is for dehydrating the sludge. That is, since the sludge contains moisture of about 98.5% or more, disposal itself causes a lot of capacity and cost. Therefore, it is necessary to separate the water and the solids from the dehydrator as much as possible so that only the sludge solids are discarded.

Fig. 2 shows a result of a practical test using the above-described advanced water treatment apparatus of the present invention.

As shown in the final processing result, the removal rate is almost 99.9% as shown in FIG.

As described above, the present invention is focused on large-capacity treatment or high-concentration polluted water treatment, and it can be seen that a plurality of aerobic baskets and a plurality of complex reaction vessels are appropriately dispersed and disposed to maximize efficiency. And the scope of the present invention is indicated by the appended claims.

100: Screen 200:
300: Collection tank 400: Drum screen
500: Flow regulating tank 600: First tank
700: No. 2 arithmetic unit 800: No. 2 arithmetic unit
900: first complex reaction tank 1000: oxic tank inlet tank
1100: aerobic tank 1200: second complex tank
2000: Chemical reaction inlet tank 2100: Chemical reaction tank
2200: Settling tank 3000: Sponge filtration tank
3100: sponge filtration tank 3200: discharge tank
4000: primary concentration tank 4100: secondary concentration tank
4200: sludge dehydrator

Claims (10)

In an advanced water treatment apparatus for treating a large amount of contaminated water and a high concentration of contaminated water,
A water collecting tank for collecting a predetermined amount of polluted water flowing through a screen for filtering suspended matters and the like;
A primary biological treatment tank for treating the polluted water through a complex reaction tank that performs a combined reaction of an anoxic tank, an anaerobic tank, and a settling tank through an aerobic tank that performs nitrification reaction with polluted water delivered through the water collecting tank;
A second biological treatment tank for re-treating intermediate treatment water through the primary biological treatment tank through an aerobic tank and a complex reaction tank;
A chemical treatment tank for treating the treated water treated through the secondary biological treatment tank with chemicals;
A filtering treatment tank for filtering and discharging treated water through a chemical treatment tank; and
And a concentration treatment tank for concentrating the sludge generated in the first biological treatment, the second biological treatment, and the chemical treatment tank, and a high concentration water treatment apparatus for treatment of large volume and high concentration wastewater. The method according to claim 1,
Wherein an oil separation tank for separating the polluted water from the incoming water is provided in front of the water collecting tank and a drum screen is further provided between the water collecting tank and the primary biological treatment tank. The method according to claim 1,
The primary biological treatment tank may be,
A flow rate adjusting tank for adjusting the concentration and the amount of the inflowing polluted water;
A first aerobic tank for partially oxidizing the organic material to supply the carbon source;
A second aquarium for performing the nitrification reaction of the organic matter; And
And a first complex reaction tank for performing a combined function of an anoxic tank, an anaerobic tank, and a settling tank for advanced treatment for removing nitrogen and phosphorus. The method of claim 3,
And the polluted water delivered from the flow rate adjusting tank is delivered to the first aquisition tank and the second aquarium tank at a ratio of 2: 8, respectively, to the high water treatment apparatus for treating wastewater of high capacity and high concentration. The method of claim 3,
The first complex reaction tank may comprise:
A plurality of partition walls provided on the inner wall at an inclined downward slope,
Wherein a scraper is provided on a lower side of a rotating central shaft passing through the center of the inner tube and a double-sided barrel of an outer tube provided on the upper side thereof with a plurality of rotating bars containing microbial media,
The polluted water passing through the oxic tank is gravity-fed from the upward direction of the inner cylinder to the bottom of the outer cylinder in a state where the flow rate is reduced by the multi-stage partition wall so that the sludge is accumulated on the lower surface, And the water is transferred upward from the bottom surface of the outer tube, and the treated water is treated by the rotating bar so as to treat the waste water with high capacity and high concentration. 6. The method of claim 5,
Wherein a combined reaction inlet vessel for collecting and mixing the treated water discharged from the first aquifer and the second aeration vessel is further provided in front of the first combined reaction vessel. The method according to claim 1,
The second biological treatment tank may further include:
An aerobic tank inflow tank for receiving the treated water treated in the first complex tank and performing a role of a reserve tank;
An aerobic tank for performing a nitrification action and internally returning a predetermined amount of microorganisms to the aerobic tank inflow tank; And
And a second complex reaction tank for performing a combined function of an anoxic tank, an anaerobic tank, and a settling tank for advanced treatment for removing nitrogen and phosphorus. The method according to claim 1,
In the chemical treatment tank,
A chemical reaction inflow tank for receiving and storing the treated water of the second complex reaction tank;
A chemical reaction tank in which a chemical chemical is introduced to perform a chemical treatment; And
And a sedimentation tank for precipitating solids generated after the treatment in the chemical reaction tank. The method according to claim 1,
In the filtration treatment tank,
A sponge filtration tank for preliminarily storing the treated water subjected to the chemical treatment;
A sponge filtration member consisting of a sponge filtration member in which sponge filter media and activated carbon are physically treated and a sponge filtration filter in which water and air are mixed so as to clean the sponge filter media member and sprayed backward; And
And an outlet tank for discharging the finally treated water to the outside or returning the treated water to the flow rate adjusting tank. The method according to claim 1,
In the above-described concentrated-
A primary concentrating tank for concentrating the sludge transferred from the combined reaction tank and the chemical sedimentation tank and transferring a part of the sludge to the material for supplying the carbon source of the first aquarium and the microorganism MLSS of the second aquarium;
A secondary concentration tank for further concentrating the concentrated sludge transferred from the primary concentration tank; And
And a sludge dewatering device for dewatering the concentrated sludge in the second concentration tank.

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