KR102488754B1 - Apparatus and Method for Treating Anaerobic Digestive Fluid - Google Patents

Abstract

The present invention relates to a digester effluent treatment device of a sewage treatment plant and a treatment method using the same, and more particularly, to a reaction tank (1000) in which anammox microorganisms live and to remove nitrogen and organic matter by receiving effluent from a digester of a sewage treatment plant. ; and an anammox culture tank for intermittently or continuously supplying anammox microorganisms to the reaction tank 1000, wherein the anammox culture tank is a continuous stirred tank reactor (CSTR) so that microorganisms can be formed in a granule type. It relates to a digester effluent treatment device of a sewage treatment plant, characterized in that it is a tank reactor, and a treatment method using the same.

Description

Apparatus and Method for Treating Anaerobic Digestive Fluid

The present invention relates to an apparatus for treating effluent from a digester of a sewage treatment plant and a treatment method using the same, and more particularly, to a continuous stirred tank reactor (CSTR, It relates to a digestion tank effluent treatment device of a sewage treatment plant including a continuous stirred tank reactor and a treatment method using the same.

Nitrogen entering the ecosystem continues to accumulate with industrial development, and the average total nitrogen inflow concentration in Korea increased from 35.0 mg/L in 2012 to 36.2 mg/L in 2013.

The effluent quality standards of domestic public sewage treatment facilities are specified in Article 3 (Effluent Water Quality Standards, etc.), Paragraph 1 of the 「Enforcement Rule of the Sewerage Act」, and the revised [Effluent Water Quality Standards of Public Sewage Treatment Facilities, Attached Table] 1], current effluent water quality consists of seven items: BOD, COD, SS, TN, TP, and total coliform count. Among them, in the case of total nitrogen, a sewage treatment plant with a daily sewage treatment capacity of 50 m ³ or less must be treated with 40 mg/L or less, and a sewage treatment plant with a capacity of 50 m ³ or more must be treated with 20 mg/L or less regardless of region and discharged.

However, from January 1, 2021, a new standard is applied. The analysis standard for chemical oxygen demand is changed from COD to TOC, and the standard value is also significantly strengthened. Total nitrogen has been maintained at 20 mg/L for about 20 years since 2000, although it has been fortified 10 times below L.

This is because of the vague judgment that total phosphorus, not total nitrogen, is the cause of the large amount of algae in public appeals, and that controlling total phosphorus is relatively effective compared to total nitrogen. However, even after the regulation of total phosphorus discharge quality has been strengthened, algal blooms still occur, and this is because total phosphorus alone regulation cannot effectively inhibit the growth of algae. Accordingly, experts believe that nitrogen emission standards will become more stringent in the future.

Although the increase in nitrogen and phosphorus outflow is expected to be an important cause of the domestic eutrophication problem, most domestic sewage treatment plants are designed only for the purpose of removing organic matter and solids. It is essential.

There are various methods such as physicochemical methods and biological treatment methods to remove nitrogen from water, but the biological treatment method has the advantage of being economical with less secondary pollution.

In particular, recently, water treatment using anaerobic ammonia oxidizing (hereinafter referred to as anammox) microorganisms has been in the limelight. Anammox technology is being developed for high-intensity electronic industrial wastewater treatment through partial nitritization and anammox processes, and ecologically, research is being conducted at the level of functional genomes and transcription regarding the global nitrogen cycle that occurs in the sea. .

Anammox microorganisms are autotrophic microorganisms that consume ammonia and nitrous acid at the same time to generate nitrogen gas. In addition, the process can be simplified by mixing and culturing with ammonia-oxidizing bacteria (AOB) at low oxygen concentration. It has the advantage of reducing overall operating costs, such as not requiring a carbon source supply.

However, while anammox microorganisms must be operated under anoxic conditions, nitrite nitrogen, which serves as a substrate, must have dissolved oxygen. pointed out as a drawback.

In addition, since anammox microorganisms have a slow growth rate, it is not easy to secure the amount of microorganisms, and in addition, excellent sedimentation must be accompanied in order to operate effectively, but technology development to solve these problems has not been achieved so far.

Korean Patent Publication No. 2010-0128121 Korean Patent Publication No. 2020-0028585

In order to solve the above problems, the present invention provides a digestion tank effluent treatment device and a treatment method using the same of a sewage treatment plant in which the inflow of raw water, the removal of nitrogen, and the outflow of treated water can be continuously performed in one integrated reaction tank. aims to do

In addition, it is an object of the present invention to provide a digestion tank effluent treatment device and a treatment method using the same of a sewage treatment plant including a culture device capable of minimizing activity degradation even in contact with oxygen and further effectively culturing anammox microorganisms having excellent sedimentation properties .

The digestion tank effluent treatment device of the sewage treatment plant according to the present invention for achieving the above object is a continuous reaction tank 1000 for removing nitrogen and organic matter by receiving the anammox microorganisms inhabiting the digester effluent of the sewage treatment plant; And an anammox culture tank for intermittently or continuously supplying anammox microorganisms to the continuous reactor 1000, wherein the anammox culture tank is a continuous stirred tank reactor (CSTR, continuous characterized in that it is a stirred tank reactor).

In addition, in the treatment device of the present invention, the continuous reaction tank 1000 includes a reaction tank body 1100 having a rectangular structure, and a raw water inlet 1110 is provided on one side of the reaction tank body 1100 and a treated water outlet 1120 is provided on the other side. It is characterized in that it is a continuous stirred tank reactor (CSTR) provided.

In addition, in the treatment device of the present invention, inside the reaction tank body 1100, an inner space of the reaction tank body 1100 is spaced apart from the bottom of the reaction tank body 1100 by a predetermined distance and extended upward so as to divide the internal space of the reaction tank body 1100 into predetermined areas. It is characterized in that the reaction tank partition wall 1400 is provided.

In addition, in the treatment device of the present invention, the lower end of the reaction tank partition 1400 is bent at a predetermined angle.

In addition, in the treatment device of the present invention, the reaction tank partition wall 1400 is characterized in that it is located near the treated water outlet 1120.

In addition, in the treatment device of the present invention, an air injection part 1200 and a reaction tank agitator 1300 are provided inside the reaction tank body 1100, but when the raw water inlet 1110 is the reference, the air injection part 1200 and It is characterized in that the reaction tank agitator 1300 is sequentially positioned, and the air injection unit 1200 and the reaction tank agitator 1300 are separated by a predetermined distance.

In addition, in the treatment device of the present invention, the anammox culture tank has a substrate inlet 111 for supplying the substrate on one side and a substrate outlet 112 for discharging the substrate on the other side, and has a predetermined shape. 100); an incubator partition wall 200 located in the inner space of the incubator main body 100; and an incubator stirrer 300 provided in the inner space of the incubator main body 100.

In addition, in the treatment device of the present invention, the incubator main body 100 includes a side portion 110 of the incubator, a bottom portion 120 sealing the lower end of the side portion 110 of the incubator, and sealing the upper end of the side portion 110 of the incubator. It consists of an upper surface portion 130 of an incubator having a horizontal cross section having an egg shape in which one area is wide and the other area is relatively narrow, like an egg cut vertically. and a second space (S2) are disposed to partition a wide area and a relatively narrow area of the incubator main body 100 so that the upper edge is in close contact with the incubator upper surface 130, and the side edge is in close contact with the incubator side surface. (110), the lower edge is positioned so as to be spaced apart from the lower surface of the incubator 120 by a predetermined distance, and the incubator agitator 300 includes a first agitator 310 and a second agitator 320, the first The agitator 310 is located in the first space S1, and the second agitator 320 is located in the second space S2.

In addition, in the present invention, as a treatment method using the digestion tank effluent treatment device of the above-described sewage treatment plant, a first step of continuously supplying raw water to the reaction tank body 1100 through the raw water inlet 1110; A second step of removing nitrogen components using anammox microorganisms; and a third step of discharging the treated water from which nitrogen components have been removed through the treated water outlet 1120, wherein the first to third steps are performed continuously.

In addition, in the treatment method of the present invention, it is characterized in that it further comprises the step of supplying the anammox microorganisms cultured in the anammox culture tank to the reaction tank main body (1100).

In addition, in the treatment method of the present invention, when the ammonia nitrogen concentration of the raw water supplied to the reaction tank main body 1100 exceeds a predetermined range, the anammox microorganisms cultured in the anammox culture tank are transferred to the reaction tank main body 1100. characterized by supplying

In addition, in the treatment method of the present invention, it is characterized in that it further comprises the step of recovering the excessively grown anammox microorganisms from the reaction tank main body (1100).

In addition, in the treatment method of the present invention, it is characterized in that it further comprises the step of supplying or storing the recovered anammox microorganisms to the anammox culture tank.

According to the digestion tank effluent treatment device and treatment method using the same of the sewage treatment plant according to the present invention, the inflow of raw water, nitrogen removal, and the outflow of treated water can be continuously performed in one reaction tank, thereby reducing the site cost for installation. There is an advantage to being

In addition, according to the digestion tank effluent treatment device and treatment method using the same of the sewage treatment plant according to the present invention, by operating in the form of a continuous stirred tank reactor, it is possible to obtain granule-type anammox microorganisms having an average particle diameter of 1 mm or more and resistant to dissolved oxygen. There is an advantage in that nitrogen removal efficiency can be increased because a microbial culture device is provided.

1 is a conceptual diagram of a digester effluent treatment device of a sewage treatment plant according to a preferred embodiment of the present invention.
2 is a perspective view of a microbial culture device according to a preferred embodiment of the present invention.
3 is a plan view of the microbial culture device shown in FIG. 2;
4 is a front view of a microbial culture device according to Comparative Example 1;
5 is a photograph of anammox microorganisms cultured under the conditions of Example 1 and Comparative Example 1.
6 is a result of nitrogen removal of anammox microorganisms cultured under the conditions of Example 1 and Comparative Example 1.
7 shows nitrogen removal results according to whether or not dissolved iron is added.
8 is a cross-sectional view of a continuous reactor 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 accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the usual or dictionary meaning, and the inventor appropriately uses the concept of the term in order to explain his/her invention in the best way. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, so at the time of this application, they are equivalent alternatives that can be replaced. It should be understood that variations may exist.

Hereinafter, a digestion tank effluent treatment device and a treatment method using the same will be described with reference to the accompanying drawings.

1 is a conceptual diagram of a digester effluent treatment device of a sewage treatment plant according to a preferred embodiment of the present invention.

As shown in FIG. 1, the digester effluent treatment apparatus according to the present invention continuously receives the digester effluent of the sewage treatment plant while continuously discharging the treated water from which nitrogen is removed, and to supply microorganisms to the continuous reaction tank. It is configured to include a microbial culture device for

First, it will be described in detail with respect to the microbial culture device. 2 is a perspective view of a microbial culture device according to a preferred embodiment of the present invention, and FIG. 3 is a plan view of the microbial culture device shown in FIG.

As shown in FIGS. 2 and 3, the apparatus for cultivating microorganisms of the present invention includes an incubator main body 100, an incubator partition wall 200, and an incubator stirrer 300.

First, the incubator main body 100 is to provide a space for culturing microorganisms while supplying raw water serving as a substrate, the incubator side part 110, the incubator lower surface part 120 for sealing the lower end of the incubator side part 110, and an incubator upper surface portion 130 sealing the upper end of the incubator side portion 110.

Here, a substrate inlet 111 is provided at the lower end of one side of the side part 110 of the incubator for supplying raw water containing a substrate that is food for microorganisms to be cultured, and at the upper end of the other side, a substrate outlet through which treated water from which the substrate is removed is discharged ( 112) is provided.

In addition, one or more sample outlets 113 may be additionally provided along the vertical direction between the substrate inlet 111 and the substrate outlet 112 so as to intermittently or non-intermittently analyze the water quality in the reaction tank.

At least one opening hole, in detail, a first opening hole 121 and a second opening hole 122 for supplying nitrogen are provided at a predetermined distance from the bottom part 120 of the incubator coupled along the lower edge of the side part 110 of the incubator. It may be provided in a spaced state.

Anammox microorganisms grow under anaerobic or anoxic conditions, and may be exposed to air when the reactor is opened for internal inspection or sensor replacement, and a large amount of microorganisms may be attached to the first agitator 310 or the second agitator 320. In this case, degassing or degassing may be achieved by supplying nitrogen for a predetermined time through the first opening 121 and the second opening 122. Of course, it is obvious that these first openings 121 and second openings 122 can act as passages when microorganisms are discharged.

At least one opening hole, in detail, the third opening hole 131 and the fourth opening hole 132 are spaced apart from each other by a predetermined distance in the upper surface portion 130 of the incubator coupled along the upper edge of the side portion 110 of the incubator. It may be provided, and various measurement sensors (not shown) for measuring the water temperature, pH, dissolved oxygen, etc. inside the reaction tank are mounted through the third opening 131 and the fourth opening 132.

On the other hand, when viewed from above, the incubator main body 100 of the present invention has a horizontal cross-section in which one side area is wide and the other side area is relatively narrow, that is, an egg shape, like a shape in which an egg is cut vertically.

In addition, the incubator partition 200 has an upper edge in close contact with the incubator upper surface 130 and a side edge in close contact with the incubator side part 110 so that the incubator main body 100 can be divided into a wide area and a relatively narrow area. In addition, the lower edge is positioned to be spaced apart from the incubator lower portion 120 by a predetermined distance. In this way, the egg-shaped incubator main body 100 is provided with the incubator partition wall 200, so that the first space S1 is formed in a wide area and the second space S2 is formed in a relatively narrow area, and the substrate inlet Reference numeral 111 has a structure in which the first space portion S1 and the substrate outlet communicate directly with the second space portion S2.

The incubator stirrer 300 is composed of a first stirrer 310 and a second stirrer 320, the first stirrer 310 is the above-described first space portion (S1), and the second stirrer 320 is the second Located in the space (S2), the substrate concentration is homogenized and at the same time induces the flow of microbial flocs.

Although not shown in the drawing, a known heating means (not shown) such as a hot wire may be additionally provided on the outer surface of the incubator main body 100 so that the temperature necessary for the habitat and proliferation of microorganisms is maintained.

The cross section of the microbial reactor is generally circular, square or elliptical, whereas in the present invention, it is egg-shaped and furthermore, the incubator partition wall 200 is provided so that the wide area is the first space (S1) and the relatively narrow area is the second space. By forming the partition S2, it is a structure that can minimize the outflow of the cultured microbial flocs because there is no dead-zone and it is easy to control the flow of the fluid.

In the culture method using the microorganism culture device having the above structure, after seeding the seed microorganisms in the incubator main body 100, raw water, that is, a substrate serving as food is continuously supplied, while treated water from which the substrate is consumed is continuously supplied. It operates in a so-called continuous stirred tank reactor (CSTR), which discharges into

Here, the microorganism is an anammox microorganism that simultaneously ingests ammonia and nitrous acid and converts it into nitrogen gas. As described above, the microorganism is operated under anoxic conditions and cultured for a predetermined period of time until the floc of the microorganism grows into a granule type having an average size of 1 mm or more. do.

Hereinafter, the contents related to microbial culture of the present invention will be described in more detail through examples. These examples are only for explaining the present invention in more detail, and the present invention is not limited thereby.

Example 1

Anammox microorganisms were cultured while operating the microorganism culture apparatus shown in FIG. 2 as a continuous stirred tank reactor (CSTR).

Anammox microorganisms cultured in T sewage treatment plant were used as seed microorganisms, and the initial MLSS concentration was about 5600 mg/L, and ammonia nitrogen concentration of 100 mg-N/L and nitrite nitrogen 100 mg-N/L were used as substrate sources. The synthetic wastewater containing it was continuously introduced (Table 1).

In addition, the hydraulic retention time (HRT) was operated while maintaining the temperature of the reactor at 35 to 37 ° C using a pH of 7 to 8, a temperature controller and a heating wire for 24 hours.

Substance name Concentration (mg/L) NH _4Cl 100 NaNO ₂ 100 NaHC0 ₃ 95 KH ₂ PO ₄ 6 MgSO ₄ ·7H ₂ O 12 CaCl ₂ 2H ₂ O 48

Example 2

After the anammox microorganisms obtained in Example 1 were seeded in the medium, the amount of nitrogen removal was investigated. At this time, as shown in <Table 2>, the specific composition of the medium contains 4 mg-Fe/L of dissolved iron.

That is, while culturing under the conditions of Example 1, after 260 days, the concentration of anammox microorganisms was injected into the medium to be 3 g / L, and then anaerobic conditions were induced by nitrogen aeration. After incubation at 35-37 ° C. for 12 hours, the supernatant was collected to measure ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen.

Substance name Concentration (mg/L) NH _4Cl 100 NaNO ₂ 100 NaHC0 ₃ 95 KH ₂ PO ₄ 6 MgSO ₄ ·7H ₂ O 12 CaCl ₂ 2H ₂ O 48 FeCl ₂ 4

Comparative Example 1

Except for the used reactor and operation method, the rest was carried out in the same manner as in Example 1. That is, as shown in FIG. 4, anammox microorganisms were cultured while operating a microorganism culture device having a circular cross section as a Sequencing Batch Reactor (SBR).

The operating conditions of each cycle are Fill and react, React, Settling, Withdrawal, and Idle. One cycle is 6 hours in total, exchange rate is 25%, and HRT is It was driven for 24 hours.

Comparative Example 2

The rest was carried out under the same conditions as in Example 2, except that dissolved iron was not contained in the medium.

Experimental Example 1

Anammox microorganisms (stereoscopic microscope) were photographed after 260 days of culture under the conditions of Example 1 and Comparative Example 1, and the results are shown in FIG. 5 .

In the case of the microorganisms cultured according to Example 1 (Fig. 5 (a)), it can be expected that the loss of microorganisms can be minimized due to excellent sedimentation in the form of granules with an average size of 1 mm or more, whereas the microorganisms obtained in Comparative Example 1 (Fig. 5(b)) was only around 0.1 mm.

Experimental Example 2

For the anammox microorganisms isolated after 260 days while culturing under the conditions of Example 1 and Comparative Example 1, the amount of nitrogen removal according to contact with dissolved oxygen was evaluated, and the results are shown in FIG. 6 .

The size of the separated microorganisms is that the microorganisms cultured according to Example 1 are in the form of granules with an average size of 1 mm or more, and the microorganisms obtained in Comparative Example 1 are flocs of approximately 0.1 mm, and the dissolved oxygen for each microorganism is 7.5 mg/L. and acclimatized for 12 hours under anaerobic conditions (nitrogen aeration).

Thereafter, the microorganisms acclimatized under each condition were inoculated into synthetic raw water having the same composition as in <Table 1> to be 3 g/L.

As shown in FIG. 6, when not exposed to dissolved oxygen, the amount of nitrogen removal of the microorganisms cultured according to Example 1 and Comparative Example 1 was within the error range and showed no significant difference.

However, when exposed to dissolved oxygen, the nitrogen removal amount of the microorganism according to Example 1 was 154 mg-N/L, whereas when using the microorganism according to Comparative Example 1, it was only 55 mg-N/L.

When operating the anammox process, oxygen must be aerated at about 2.0 mg/L so that ammonia-oxidizing bacteria (AOB) oxidizes ammonia nitrogen. can act as a factor.

However, it can be confirmed that the microorganism cultured according to Example 1 of the present invention maintains excellent nitrogen removal ability even when in contact with high concentration of dissolved oxygen.

Experimental Example 3

Under the conditions of Example 2 and Comparative Example 2, the amount of nitrogen removal was confirmed after 12 hours, and the results are shown in FIG. 7 .

In the medium containing dissolved iron (Example 2), 201.06 mg/L of nitrogen was removed, whereas in the medium without dissolved iron (Comparative Example 2), 190.262 mg/L of nitrogen was removed. It was confirmed that the activity of Mox microorganisms was improved.

Next, the continuous reactor will be described in detail.

The continuous reaction tank 1000 includes a reaction tank body 1100 having a closed rectangular structure including four sides, a bottom surface and an upper surface, an air injection unit 1200, a reaction tank agitator 1300, and a reaction tank partition wall 1400. do.

On one side of the reaction tank body 1100, a raw water inlet 1110 through which the effluent from the digester of the sewage treatment plant flows is provided, while the other side is provided with an outlet 1120 through which the treated water from which ammonia nitrogen and organic matter are removed is discharged. It is a continuous stirred tank reactor (CSTR).

In addition, the corner portion of one side of the reaction tank body 1100, specifically, the corner portion where the side surface provided with the outlet 1120 and the bottom surface meet, is inclined at a predetermined angle to minimize breaking of the proliferated microbial granules and to facilitate recovery of excess microorganisms. A true inclined surface 1130 is formed, and a drain pipe 1140 for collecting microorganisms is mounted on the inclined surface 1130.

The air injection unit 1200 and the reaction tank agitator 1300 are separated by a predetermined distance from the inside of the reaction tank 1000, more specifically, based on the raw water inlet 1110. are placed in sequential order.

Here, the air injection unit 1200 is for supplying dissolved oxygen so that ammonia-oxidizing bacteria (AOB) for oxidation of nitrate nitrogen can maintain their activity, and the reaction tank agitator (1300) located relatively rearward. ) is to promote the mixing or flow of microorganisms and raw water.

As described in Experimental Example 2 related to the microbial culture device, the microorganisms cultured in the microbial culture device of the present invention are in the form of granules with an average size of 1 mm or more, and it is possible to maintain high nitrogen removal ability after contact with high concentrations of dissolved oxygen. Therefore, even if operated in the form of a continuous stirred tank reactor, it is possible to simultaneously induce nitrification and denitrification in one reactor main body 1100.

Subsequently, the reaction tank partition wall 1400 is positioned near the treated water outlet 1120 and spaced apart from the bottom of the reaction tank body 1100 by a predetermined distance so as to divide the internal space of the reaction tank body 1100 into predetermined areas. It extends upward, and in particular, the lower end of the reaction tank partition wall 1400 is bent at a predetermined angle.

Solid-liquid separation is further facilitated in the reaction tank partition wall 1400 having the above configuration.

Next, a method of treating effluent from a digester of a sewage treatment plant using the above devices will be described.

A method for treating digester effluent from a sewage treatment plant according to the present invention is a first step of continuously supplying raw water to the reaction tank body 1100 through the raw water inlet 1110, the front end of the reaction tank body 1100 is 1 ~ 2mg / A second step of removing nitrogen components through denitrification by anammox microorganisms at the rear end while maintaining DO of about L to induce nitrite oxidation by AOB, and the treated water from which nitrogen components have been removed is passed through the treated water outlet (1120). ), and these first to third steps are operated in the form of a continuous stirred tank reactor in which raw water supply, nitrogen removal, and treated water discharge are continuously performed.

Of course, before or after the first step, a step of supplying the anammox microorganisms cultured in the anammox culture tank to the reaction tank main body 1100 may be further included. For example, in the case of a newly established treatment device, it is preferable to increase activity through seeding of anammox microorganisms inside the reaction tank body 1100 before supplying raw water.

In addition, when the ammonia nitrogen concentration of the raw water supplied to the reaction tank main body 1100 exceeds a predetermined range, anammox microorganisms cultured in the anammox culture tank may be additionally supplied to the reaction tank main body 1100 so that nitrogen can be sufficiently removed. can

On the other hand, it is possible to supply microorganisms in the form of granules of 1 mm or more cultured in the anammox culture tank to the reaction tank body 1100 as it is, but it is more preferable to impregnate the microorganisms with iron particles to increase sedimentation before supplying them.

As a method of impregnating iron particles into granular microorganisms, 1 part by weight of iron particles having a size of 50 μm to 100 μm is mixed with 1 part by weight of microorganisms based on VSS, and then stirred at about 100 to 150 rpm for 3 to 12 hours to iron. Microorganisms in the form of granules impregnated with particles may be prepared.

In addition, when the anammox microorganisms proliferate excessively, it is also possible to include a step of recovering the microorganisms from the reaction tank body 1100 so that the concentrations of the substrate and the microorganisms fall within an appropriate range. At this time, the recovered microorganisms are anammox cultured It can be returned to the tank or stored separately.

As a method of storing microorganisms, it is preferable to store them in distilled water alone or in distilled water containing potassium nitrate at 20 to 25 ° C., and to replace the distilled water about once every 2 to 3 months for long-term storage.

As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those skilled in the art to which the present invention belongs Of course, various modifications and variations are possible within the equivalent scope of the claims to be described.

100: incubator main body
110: incubator side part
111: substrate inlet 112: substrate outlet
113: sample outlet
120: incubator lower part
121: first opening 122: second opening
130: incubator upper surface
131: third opening 132: fourth opening
200: incubator bulkhead
300: incubator agitator
310: first agitator
320: second agitator
1000: continuous reactor
1100: reaction tank body
1110: raw water inlet 1120: treated water outlet
1130: inclined surface 1140: drain pipe
1200: air inlet
1300: reaction tank agitator
1400: reaction tank bulkhead
S1: first space part
S2: second space part

Claims (13)

delete delete delete delete delete delete delete delete A reaction tank body 1100 having a rectangular structure operated by a continuous stirred tank reactor (CSTR) equipped with a raw water inlet 1110 on one side and a treated water outlet 1120 on the other side, and the reaction tank body 1100 ) In a state in which the air injector 1200 and the reaction tank agitator 1300 located inside are spaced apart from the bottom surface of the reaction tank body 1100 by a predetermined distance so as to divide the internal space of the reaction tank body 1100 into a predetermined area. It includes a reaction tank partition wall 1400 extending upward, and the air injection part 1200 and the reaction tank agitator 1300 are sequentially positioned relative to the raw water inlet 1110, and the air injection part 1200 and The reaction tank agitator 1300 is spaced apart by a predetermined distance, and the reaction tank partition wall 1400 is located near the treated water outlet 1120 and has a lower end bent at a predetermined angle. ) A first step of continuously supplying raw water;
A second step of removing nitrogen components using anammox microorganisms; and
Including a third step of discharging the treated water from which nitrogen components have been removed,
The first to third steps are performed continuously,
Further comprising supplying the anammox microorganisms cultured in the anammox culture tank to the reaction tank body 1100,
The anammox culture tank is operated with a continuous stirred tank reactor (CSTR) so that the microorganisms can be formed in a granular type, culturing granular-type microorganisms having an average size of 1 mm or more,
The anammox culture tank has a substrate inlet 111 for supplying substrate on one side and a substrate outlet 112 for discharging the substrate on the other side, and the side portion 110 of the incubator is sealed at the lower end of the side portion 110 of the incubator. It consists of a lower surface portion 120 of the incubator and an upper surface portion 130 that seals the upper end of the side portion 110 of the incubator, and the horizontal cross section has a wide area on one side and a relatively narrow area on the other side, like an egg cut vertically. An egg-shaped incubator body portion 100; It is arranged to partition a wide area and a relatively narrow area of the incubator main body 100 so that the first space part S1 and the second space part S2 are formed, and the upper edge is in close contact with the upper surface part 130 of the incubator. The incubator partition wall 200 located in the inner space of the incubator main body 100, the side edge of which is in close contact with the incubator side part 110, and the lower edge of the incubator is spaced apart from the incubator lower part 120 by a predetermined distance; And it consists of a first stirrer 310 and a second stirrer 320, the first stirrer 310 is located in the first space portion (S1), the second stirrer 320 is located in the second space portion (S2) A digester effluent treatment method of a sewage treatment plant, comprising:
delete According to claim 9,
Sewage treatment plant, characterized in that supplying the anammox microorganisms cultured in the anammox culture tank to the reaction tank main body 1100 when the ammonia nitrogen concentration of the raw water supplied to the reaction tank main body 1100 exceeds a predetermined range of digester effluent treatment method.
According to claim 9,
The digestion tank effluent treatment method of the sewage treatment plant, characterized in that it further comprises the step of recovering the excessively proliferated anammox microorganisms from the reaction tank body (1100).
According to claim 12,
Digester effluent treatment method of sewage treatment plant, characterized in that it further comprises the step of supplying or storing the recovered anammox microorganisms into the anammox culture tank.

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