KR102198308B1 - Water treatment apparatus for removing nitrogen in treated water and water treatment method using the same - Google Patents

Abstract

The present invention relates to a water treatment device for removing nitrogen contained in water to be treated and a water treatment method using the same, and more particularly, to remove organic matter and phosphorus in advance, and effectively remove nitrogen through an anamox process, and The present invention relates to a water treatment apparatus capable of effectively removing nitrogen compounds (nitrate ions, nitrite ions, ammonium ions, etc.) that have not been removed by the MOX process, and a water treatment method using the same. To this end, the water treatment device includes a denitration reactor for removing nitrogen contained in the supplied water to be treated; A phosphorus treatment tank located at the rear end of the denitration reactor and removing phosphorus (P) contained in the water to be treated; An anamox reactor located at the rear end of the phosphorus treatment tank and removing nitrogen contained in the water to be treated; Ana Comox reaction tank located at the rear end, the ammonium ions in the raw water tank Ana Comox (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO ₂ ^-) part of the transition to the Garden nitrite; And a sedimentation tank located at the rear end of the partial nitrite oxidation tank, sedimenting sludge contained in the treated water supplied from the partial nitrite oxidation tank, and discharging the treated water through the treatment water discharge pipe.

Description

A water treatment device that removes nitrogen contained in the water to be treated, and a water treatment method using the same {WATER TREATMENT APPARATUS FOR REMOVING NITROGEN IN TREATED WATER AND WATER TREATMENT METHOD USING THE SAME}

The present invention relates to a water treatment device for removing nitrogen contained in water to be treated and a water treatment method using the same, and more particularly, to remove organic matter and phosphorus in advance, and effectively remove nitrogen through an anamox process, and The present invention relates to a water treatment apparatus capable of effectively removing nitrogen compounds (nitrate ions, nitrite ions, ammonium ions, etc.) that have not been removed by the MOX process, and a water treatment method using the same.

The causes of water pollution include organic matter and inorganic matter such as nitrogen and phosphorus. Nitrogen is one of the nutrients, causing negative effects and red tide, accelerating the generation of harmful airborne organisms and increasing the chemical oxygen demand, and organic matter must be removed because it reduces the amount of dissolved oxygen in the water system.

As a method of treating wastewater containing such various pollutants, the metabolic action of aquatic microorganisms is used.

Most common wastewater treatment methods are in the form of decomposing and treating organic matter in wastewater in a reaction tank using aerobic microorganisms. However, the general wastewater treatment method as described above has a disadvantage in that the amount of power consumed for the operation of an air diffuser or blower for supplying air into the reaction tank is large. In the case of Korea, it is known that about 40% of the total power consumption of the sewage treatment plant is consumed for blower operation. In addition, nitrogen in wastewater is generally removed by nitrification/denitrification (sub-nutritional denitrification) processes (eg, MLE, A2O processes, etc.).

However, in the case of removing nitrogen by a general nitrification/denitrification process, a large amount of air must be supplied to nitrify ammonia into nitrate, and since organic matter is required during denitrification, additional organic matter must be added, and a large amount of sludge is generated. There is a problem of increasing cost.

The proposed nitrogen removal process to solve this problem is an anamox process. This is to remove nitrogen by generating nitrogen gas by reacting ammonia and nitrite, which can reduce the power consumption required for ammonia oxidation, does not require the addition of organic matter, and aims to reduce the amount of sludge generated compared to general nitrification/denitrification processes. It can be very economical.

In general, in the SBR method, the Anamox process performs a nitrogen removal process in one reactor. However, the SBR method has a disadvantage in that the discharge ratio and the nitrogen removal rate are inversely proportional to the reaction tank due to the operation characteristics operated through time distribution and the nitrogen removal characteristics removed through nitrification and denitrification, so that the SBR reaction tank improves the nitrogen removal efficiency. The reality is that things are limited.

In addition, there is a problem in that the efficiency of the Anamox process is deteriorated if a material such as organic matter or phosphorus is not removed prior to the Anamox process.

Accordingly, there is a need for development of a technology capable of improving nitrogen removal efficiency.

Korean Patent Application Publication No. 10-2017-0085886

The present invention is to solve the above problems, and an object of the present invention is to remove organic matter and phosphorus in advance, effectively remove nitrogen through the Anamox process, and nitrogen compounds that have not been removed by the Anamox process (nitrate A water treatment apparatus capable of effectively removing ions, nitrite ions, ammonium ions, etc.) and a water treatment method using the same.

The above and other objects and advantages of the present invention will become apparent from the following description of preferred embodiments.

The above object is a denitrification reactor for removing nitrogen contained in the supplied water to be treated; A phosphorus treatment tank located at the rear end of the denitration reactor and removing phosphorus (P) contained in the water to be treated; An anamox reactor located at the rear end of the phosphorus treatment tank and removing nitrogen contained in the water to be treated; Ana Comox reaction tank located at the rear end, the ammonium ions in the raw water tank Ana Comox (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO ₂ ^-) part of the transition to the Garden nitrite; And a sedimentation tank located at the rear end of the partial nitrite oxidation tank, sedimenting sludge contained in the treated water supplied from the partial nitrite oxidation tank, and discharging the treated water through the treatment water discharge pipe; can be achieved by a water treatment apparatus including .

The denitration reactor includes a membrane immersed in water to be treated flowing into the interior; And a reciprocating device connected to a membrane to reciprocate the membrane. At this time, the reciprocating device includes a sliding frame connected to the membrane; And a rotor connected to the slide frame via the shaft.

The phosphorus treatment tank can remove phosphorus contained in the water to be treated using magnesium ions.

The Anamox reactor can contain Anamox bacteria therein, and at this time, the Anamox microorganisms are Candidatus Kuenenia, Candidatus Brocadia, and Candidatus Ana. It may be at least one selected from the group consisting of Candidatus Anammoxoglobus, Candidatus Jettenia, and Candidatus Scalindua, and the Anamox microorganism is a honeycomb-type media ( media) can be accommodated.

The partial nitrite oxidizing tank can accommodate aerobic ammonium oxidizing bacteria (AOB) therein, and the ammonium oxidizing bacteria may be Nitrosomonas or Nitrosococcus, and ammonium oxidizing bacteria Can be accommodated by being carried on a honeycomb-type media.

In addition, preferably, it further comprises a first transfer pipe connected to a predetermined point of the treatment water discharge pipe and the denitrification reaction tank, and a part of the treatment water discharged from the sedimentation tank through the first transfer pipe is returned to the denitrification reaction tank to ion (Nitrate, NO ₃ ^-) can be removed.

In addition, preferably, it further comprises a second transfer pipe connected to a predetermined point of the water discharge pipe and the Anamox reaction tank, and a part of the water to be treated discharged from the settling tank through the second transfer pipe is returned to the Anamox reaction tank is nitrite ion (nitrite, NO ₂ ^-) can be removed.

In addition, preferably, it further includes a third transfer pipe connected to the lower portion of the settling tank and the partial nitrite oxidation tank, and a part of the sludge discharged from the settling tank through the third transfer pipe may be transferred to the partial nitrite oxidation tank.

In addition, the object is, in the water treatment method using the water treatment apparatus described above, the first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; And the unreacted ammonium ions in the reaction process Ana Comox ammonium ions (NH ₄ ⁺⁾ nitrite ion ^- a fourth step of switching to (Nitrite, NO _2); can be achieved by a water treatment method comprising a.

In the first step, nitrogen contained in the water to be treated can be removed by reciprocating a membrane immersed in the water to be treated, and the second step is phosphorus contained in the water to be treated using magnesium ions ( P) can be removed.

In addition, the object is, in the water treatment method using the water treatment apparatus described above, the first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; A fourth step of switching to ^- the unreacted ammonium ions in the reaction process Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO _2); And a 5-1 step of removing nitrate ions (Nitrate, NO ₃ ⁻ ) by returning a portion of the water to be treated through the fourth step to the denitrification tank. It may be achieved by a water treatment method including.

In addition, the object is, in the water treatment method using the water treatment apparatus described above, the first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; A fourth step of switching to ^- the unreacted ammonium ions in the reaction process Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO _2); And a 5-2 step of removing nitrite ions (Nitrite, NO ₂ ^- ) by returning a part of the water to be treated through the fourth step to the Anamox reaction tank. It may be achieved by a water treatment method comprising.

In addition, the object is, in the water treatment method using the water treatment apparatus described above, the first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; A fourth step of switching to ^- the unreacted ammonium ions in the reaction process Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO _2); And a 5-3 step of returning a part of the sludge that has undergone the fourth step process to a partial nitrous oxidation tank.

According to the present invention, the anamox process is stably operated and thus has an effect of improving nitrogen removal efficiency.

Specifically, the Anamox process can be stably operated by removing high concentrations of suspended substances, COD, phosphorus, etc. contained in the water to be treated at the front of the Anamox reactor, thereby improving the nitrogen removal effect. .

In addition, a partial nitrite tank can be separately installed at the rear end of the Anamox reaction tank to remove unreacted ammonium ions, and a part of the water to be treated that has passed through the partial nitrite tank is returned to the denitrification tank and the Anamox reaction tank to It can have the effect of removing.

However, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a schematic view of a water treatment apparatus according to an embodiment of the present invention.
2 is a diagram schematically showing a denitration reactor according to an example.
3 is a diagram schematically showing a reciprocating device according to an example.
4 is a diagram showing in detail a reciprocating device according to an example.
5 is a diagram schematically showing a water treatment apparatus according to an embodiment of the present invention.
6 is a view schematically showing a water treatment apparatus according to an embodiment of the present invention.
7 is a diagram schematically showing a water treatment apparatus according to an embodiment of the present invention.
8 is a view schematically showing a water treatment apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention and drawings. These examples are only illustratively presented to illustrate the present invention in more detail, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not limited by these examples. .

In addition, unless otherwise defined, all technical and scientific terms used in the present specification have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and in case of conflict, the present specification including definitions The description of will take precedence.

In order to clearly describe the invention proposed in the drawings, parts not related to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification. And, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary. In addition, "unit" described in the specification means one unit or block that performs a specific function.

In each step, the identification code (first, second, etc.) is used for convenience of description, and the identification code does not describe the order of each step, and each step does not clearly describe a specific sequence in the context. It may be implemented differently from the order specified above. That is, each of the steps may be performed in the same order as the specified order, may be performed substantially simultaneously, or may be performed in the reverse order.

1 is a diagram schematically showing a water treatment apparatus 1 according to an embodiment of the present invention. Referring to FIG. 1, a water treatment apparatus 1 according to an embodiment of the present invention includes a denitration reactor 100 for removing nitrogen contained in supplied water to be treated; A phosphorus treatment tank 200 located at a rear end of the denitration reactor 100 and removing phosphorus (P) contained in the water to be treated; An anamox reaction tank 300 located at the rear end of the phosphorus treatment tank 200 and removing nitrogen contained in the water to be treated; Ana Comox located to the rear end tank 300, the ammonium ions in the raw water tank Ana Comox 300 (NH ₄ ^+), nitrite ion (Nitrite, NO ₂ ^-) part of the Garden nitrite (400) to switch to; And a sedimentation tank 500 located at the rear end of the partial nitrite oxidation tank 400, for sedimenting sludge contained in the treated water supplied from the partial nitrite oxidation tank 400, and discharging the treated water through the treatment water discharge pipe. do. The present invention has the effect of improving the nitrogen removal efficiency by stably operating the Anamox process. Specifically, the Anamox process is stably operated by removing high concentrations of suspended substances, COD, phosphorus, etc. contained in the water to be treated at the front of the Anamox reactor 300, thereby improving the effect of removing nitrogen. Can have. In addition, a partial nitridation tank 400 can be separately installed at the rear end of the anamox reaction tank 300 to remove unreacted ammonium ions, and a part of the water to be treated that has passed through the partial nitrite oxidation tank 400 is transferred to the denitrification tank 100 And it may have the effect of removing nitrate ions and nitrite ions by returning to the anamox reaction tank 300.

FIG. 2 is a diagram schematically showing a denitration reactor 100 according to an example. When described with reference to this, the denitration reactor 100 is an oxygen-free tank and includes a membrane 110 that is immersed in water to be treated flowing into the interior; And a reciprocating device 120 connected to the membrane 110 to reciprocate the membrane 110.

The membrane 110 is used as a physical barrier for complete solid/liquid separation, and may be a low pressure microfiltration (MF) or ultrafiltration (UF) membrane. The membranes 110 are mechanically connected to each other to the reciprocating device 120. 3 and 4 are views each showing a reciprocating device 120, and when described with reference to this, the reciprocating device 120 is used to reciprocate the membrane 110, and the reciprocating device 120 reciprocates a rotational motion. You can use a mechanical device to convert it. The membrane 110 may be connected to the sliding frame 121. The rotor 123 is connected to the sliding frame 121 via the shaft 122. The rotational motion of the rotor 123 is converted into a rotational motion of the sliding frame 121. The frequency of reciprocation may be influenced by the speed at which the rotor 123 is rotated.

More specifically, through the low-speed motor 130 and the shaft 122 connected to the pulley 128 via the belt 129 converts the rotational motion into a reciprocating motion of the sliding frame 121. The impact load due to the reciprocating motion may be reduced by the shock absorber 127 between the slide frame 121 and the shaft 122. The slide frame 121 can be variable along a slide rail 124 carrying a linear bearing and axle support.

The phosphorus treatment tank 200 is located at the rear end of the denitrification reactor 100 and removes phosphorus (P) contained in the water to be treated. At this time, various known chemicals may be used, and preferably, magnesium ions may be added to the water to be treated to remove phosphorus contained in the water to be treated.

The Anamox reaction tank 300 is located at the rear end of the phosphorus treatment tank 200 and accommodates the Anamox microorganism therein to remove nitrogen in the water to be treated through the Anamox reaction. Anammox is an abbreviation for ANaerobic AMMonium OXidation, and refers to a microbial species that metabolizes using nitrogen or a process using the same. As a technology for finally reducing and releasing nitrogen compounds with nitrogen gas, it has recently been in the spotlight in the field of sewage treatment. Ana Comox process is as the following formula (1), first by the ammonia oxidizing bacteria oxidize the half of the ammonium ion nitrite ion (Nitrite, NO ₂ ^-) to generate a.

[Formula 1]

Subsequently, as shown in the following Chemical Formula 2, the anamox bacteria (anamox microorganism) reacts with ammonium ions and nitrite ions to generate nitrogen, thereby removing the nitrogen compound. At this time, the ammonium ion and nitrite react in a molar ratio of about 1:1.

[Formula 2]

Anamox microorganisms accommodated in the Anamox reactor 300 are Candidatus Kuenenia, Candidatus Brocadia, Candidatus Anammoxoglobus, and Candidatus zetenny It may be at least one selected from the group consisting of a child (Candidatus Jettenia) and Candidatus scalidua (Candidatus Scalindua). The Anamox microorganism is supported on a honeycomb-type media and accommodated in the Anamox reactor 300.

The partial nitrite oxidizing tank 400 is located at the rear end of the Anamox reactor 300, and accommodates aerobic ammonium oxidizing bacteria (AOB) therein, and untreated ammonium ions (NH ₄ ⁺ ) in the Anamox reactor 300 the nitrite ^ion is converted to (nitrite, NO _2). At this time, the ammonium oxidizing bacteria may be Nitrosomonas or Nitrosococcus, and are supported in a honeycomb-type media and accommodated in the partial nitrite oxidation tank 400.

The sedimentation tank 500 is located at the rear end of the partial nitrite oxidation tank 400, precipitates sludge contained in the treated water supplied from the partial nitrite oxidation tank 400, and discharges the treated water through the treatment water discharge pipe.

5 is a diagram schematically showing a water treatment apparatus 1 according to an embodiment of the present invention. Referring to FIG. 5, the water treatment apparatus 1 according to an embodiment of the present invention further includes a first transfer pipe 600 connected to a predetermined point of the treatment water discharge pipe and the denitration reaction tank 100, and , a part of the for-treatment water to be discharged through the first feed pipe 600 from the sedimentation tank 500 is returned to the denitrification reactor 100, a nitrate ion (nitrate, NO ₃ ^-) can be removed. That is, the water to be treated passing through the settling tank 500 exhausts almost all of the ammonium ions (NH ₄ ⁺ ) therein by the anamox process and the partial nitrite process. However, as a by-product of the process know Comox, nitrate ion (Nitrate, NO ₃ ^-), etc. There can be produced a nitrate ion (Nitrate, NO ₃ ^-), it is necessary to remove. Accordingly, when the water to be treated is returned to the denitrification tank 100 through the first transfer pipe 600, it may have an effect of removing nitrate ions (Nitrate, NO ₃ ⁻ ) contained in the water to be treated. .

6 is a diagram schematically showing a water treatment apparatus 1 according to an embodiment of the present invention. Referring to FIG. 6, the water treatment apparatus 1 according to an embodiment of the present invention further includes a second transfer pipe 700 connected to a predetermined point of the water discharge pipe and the Anamox reaction tank 300. and the second portion of the for-treatment water to be discharged through the feed pipe 700 from the sedimentation tank 500 is conveyed to the analog Comox tank 300 nitrite ion (nitrite, NO ₂ ^-) can be removed. That is, the water to be treated is subjected to a settling tank 500 is an ammonium ion (NH ₄ ⁺⁾ and nitrite ion (Nitrite, NO ₂ ^-) in the interior by the analog process and Comox part nitrite drawing process is almost exhausted, the. However, the nitrite ion (Nitrite, NO ₂ ^-) untreated by activity and ammonium ion content and difference of nitrite ions of microorganisms can be left. Accordingly, when the water to be treated is returned to the Anamox reaction tank 300 through the second transfer pipe 700, the nitrite ions contained in the water to be treated are reacted with ammonium ions and Anamox to remove the effect with nitrogen. Can have.

7 is a diagram schematically showing a water treatment apparatus 1 according to an embodiment of the present invention. Referring to FIG. 7, the water treatment apparatus 1 according to an embodiment of the present invention further includes a third transfer pipe 800 connected to the lower part of the sedimentation tank 500 and the partial nitrite oxidation tank 400, Part of the sludge discharged from the sedimentation tank 500 through the third transfer pipe 800 is returned to the partial nitrite oxidation tank 400 to recover aerobic ammonium oxidizing bacteria (AOB).

8 is a diagram schematically showing a water treatment apparatus 1 according to an embodiment of the present invention. Referring to FIG. 8, the water treatment apparatus 1 according to an embodiment of the present invention includes all of the first transport pipe 600, the second transport pipe 700, and the third transport pipe 800 described above. can do. That is, the nitrate ion by-produced in accordance with the precipitation tank 500 to the target is know Comox step in the number of subjecting (Nitrate, NO ₃ ^-), Ana nitrite ions not involved in Comox step (Nitrite, NO ₂ ^-), etc. there are, to return it to the respective NO x removal reaction tank 100 and the analog Comox tank 300, a nitrate ion (nitrate, NO ₃ ^{-) -} can be removed, nitrite ion (nitrite, NO _2). In addition, a part of the sludge discharged from the sedimentation tank 500 may be returned to the partial nitrite oxidation tank 400 through the third transfer pipe 800 to recover the ammonium oxidizing bacteria (AOB).

Next, a water treatment method using the water treatment device 1 will be described. In describing this, the description of overlapping parts will be omitted.

A water treatment method according to an embodiment of the present invention is a water treatment method using the above-described water treatment apparatus (see FIG. 1), comprising: a first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; And the unreacted ammonium ions in the reaction process Ana Comox ammonium ions (NH ₄ ⁺⁾ nitrite ion ^- a fourth step of switching to (Nitrite, NO _2); and a. The present invention has the effect of improving the nitrogen removal efficiency by stably operating the Anamox process. Specifically, the Anamox process is stably operated by removing high concentrations of suspended substances, COD, phosphorus, etc. contained in the water to be treated at the front of the Anamox reactor 300, thereby improving the effect of removing nitrogen. Can have.

The first step is a step performed in an oxygen-free tank, and nitrogen, organic matter, etc. contained in the water to be treated may be removed by reciprocating the membrane 110 immersed in the water to be treated. The water to be treated, which has undergone the denitrification reaction in the first step, is moved to a phosphorus removal tank. The second step is a step performed in a phosphorus removal tank, and phosphorus can be removed by various known methods, but it is preferable to remove phosphorus (P) contained in the water to be treated using magnesium ions. The water to be treated from which phosphorus has been removed in the second step moves to the Anamox reactor 300. The third step is a step in which analog Comox the analog Comox reaction performed in the reaction tank 300, an ammonium ion (NH ₄ ⁺⁾ and nitrite ion contained in the water to be treated (Nitrite, NO ₂ ^-) reacting the resulting nitrogen And then remove. The water to be treated from which nitrogen has been removed in the third step moves to the partial nitrite oxidation tank 400. The fourth step is to not involved in the reaction Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ^ion and converted into (Nitrite, NO _2). The water to be treated passing through the partial nitrite oxidation tank 400 stays in the settling tank 500 and precipitates the sludge, and is discharged through the treatment water discharge pipe.

A water treatment method according to an embodiment of the present invention is a water treatment method using the above-described water treatment apparatus (see FIG. 5), comprising: a first step of removing nitrogen contained in supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; A fourth step of switching to ^- the unreacted ammonium ions in the reaction process Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO _2); And a 5-1 step of removing nitrate ions (Nitrate, NO ₃ ⁻ ) by returning a portion of the water to be treated through the fourth step to the denitration reaction tank 100. That is, the above-described water treatment method and up to the fourth step are performed in the same process, but after passing through the fourth step, a part of the water to be treated is returned to the denitrification tank 100 through the first transfer pipe 600 and nitrate ion It can be removed ^- (Nitrate, NO _3). The water to be treated passing through the sedimentation tank 500 exhausts almost all of the ammonium ions (NH ₄ ⁺ ) therein by an anamox process and a partial nitrite oxidation process. However, as a by-product of the process know Comox, nitrate ion (Nitrate, NO ₃ ^-), etc. There can be produced a nitrate ion (Nitrate, NO ₃ ^-), it is necessary to remove. Accordingly, when the water to be treated is returned to the denitrification tank 100 through the first transfer pipe 600, it may have an effect of removing nitrate ions (Nitrate, NO ₃ ⁻ ) contained in the water to be treated. .

A water treatment method according to an embodiment of the present invention is a water treatment method using the above-described water treatment apparatus (see FIG. 6), comprising: a first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; A fourth step of switching to ^- the unreacted ammonium ions in the reaction process Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO _2); And to transport a portion of the fourth process step coarse water to be treated to know Comox reaction tank 300, nitrite ion (Nitrite, NO ₂ ^-) the second step 5-2 of removing; includes. That is, the above-described water treatment method and up to the fourth step are performed in the same process, but after passing through the fourth step, a part of the water to be treated is returned to the Anamox reactor 300 through the second transfer pipe 700 to obtain nitrite. ion (Nitrite, NO ₂ ^-) can be removed. Water to be treated is subjected to a settling tank 500 is an ammonium ion (NH ₄ ⁺⁾ and nitrite ion (Nitrite, NO ₂ ^-) in the interior by the analog process and Comox part nitrite drawing process is almost exhausted, the. However, the nitrite ion (Nitrite, NO ₂ ^-) untreated by activity and ammonium ion content and difference of nitrite ions of microorganisms can be left. Accordingly, when the water to be treated is returned to the Anamox reaction tank 300 through the second transfer pipe 700, the nitrite ions contained in the water to be treated are reacted with ammonium ions and Anamox to remove the effect with nitrogen. Can have.

A water treatment method according to an embodiment of the present invention is a water treatment method using the above-described water treatment apparatus (see FIG. 6), comprising: a first step of removing nitrogen contained in the supplied water to be treated; A second step of removing phosphorus (P) contained in the water to be treated; A third step of removing nitrogen contained in the water to be treated through an anamox reaction; A fourth step of switching to ^- the unreacted ammonium ions in the reaction process Ana Comox ammonium ion (NH ₄ ⁺⁾ nitrite ions (Nitrite, NO _2); And a 5-3 step of returning a part of the sludge that has undergone the fourth step process to the partial nitrous oxidation tank 400. That is, the above-described water treatment method and the fourth step are carried out in the same process, but by returning a part of the sludge precipitated after the fourth step to the partial nitrite oxidation tank 400, aerobic ammonium oxidizing bacteria (Ammonium Oxidizing Bacteria, AOB) can be recovered.

In addition, the water treatment method described above may be performed by including all of steps 5-1, 5-2, and 5-3, as in the water treatment apparatus 1 shown in FIG. 8. That is, a part of the water to be treated that has passed through the partial nitrite tank 400 can be returned to the denitrification tank 100 and the anamox reaction tank 300 to remove nitrate ions and nitrite ions, and the sludge can be removed from the partial nitrite tank 400 ) To retrieve the AOB.

In the present specification, only a few examples of various embodiments performed by the present inventors are described, but the technical idea of the present invention is not limited or limited thereto, and it is obvious that it may be modified and variously implemented by those skilled in the art.

1: water treatment device
100: denitrification reactor
110: membrane
120: reciprocating device
121: slide frame
122: axis
123: rotor
124: slide rail
125: linear bearing accompanying the mandrel
126: membrane cassette connection point
127: shock absorber
128: pulley
129: belt
130: low speed motor
200: phosphorus treatment tank
300: Anamox reactor
400: partial nitrite oxidation tank
500: settling tank
600: Transfer pipe 1
700: 2nd transfer tube
800: 3rd return building

Claims (19)

A denitration reactor for removing nitrogen contained in the supplied water to be treated;
A phosphorus treatment tank located at the rear end of the denitration reactor and removing phosphorus (P) contained in the water to be treated;
An anamox reactor located at the rear end of the phosphorus treatment tank and removing nitrogen contained in the water to be treated;
Ana Comox reaction tank located at the rear end, the ammonium ions in the raw water tank Ana Comox (NH ₄ ⁺⁾ nitrite ions (NO ₂ ^-) part of the transition to the Garden nitrite; And
Including; a sedimentation tank located at the rear end of the partial nitrite oxidation tank, for precipitating sludge contained in the treated water supplied from the partial nitrite oxidation tank, and discharging the treated water through the treatment water discharge pipe
The denitration reactor includes a membrane immersed in water to be treated flowing into the interior; And a reciprocating device connected to a membrane to reciprocate the membrane,
To be treated, including a first feed pipe connected to a predetermined point and the denitrification tank of the discharge pipe, wherein the portion of the for-treatment water discharged from the sedimentation tank through the first return pipe is returned to the denitrification reactor the nitrate ion (NO ₃ ^- ),
A portion of the water to be treated discharged from the settling tank through the second transfer tube, including a predetermined point of the water discharge pipe and a second transfer tube connected to the Anamox reaction tank, is returned to the Anamox reaction tank and nitrite ions (NO ₂ ^- removes ),
Including a third transfer pipe connected to the lower portion of the settling tank and the partial nitrite oxidation tank, a part of the sludge discharged from the settling tank through the third transfer pipe is returned to the partial nitrite oxidation tank. delete The method of claim 1, wherein the reciprocating device,
A sliding frame connected to the membrane; And
A water treatment device comprising a; rotor connected to the slide frame via the shaft. The method of claim 1, wherein the phosphorus treatment tank,
A water treatment apparatus, characterized in that the phosphorus contained in the water to be treated is removed using magnesium ions. The method of claim 1, wherein the Anamox reactor,
A water treatment device, characterized in that it accommodates Anamox bacteria inside. The method of claim 5, wherein the Anamox microorganism,
Candidatus Kuenenia, Candidatus Brocadia, Candidatus Anammoxoglobus, Candidatus Jettenia and Candidatus Scalidua ), characterized in that at least one selected from the group consisting of, water treatment apparatus. The method of claim 5, wherein the Anamox microorganism,
A water treatment apparatus, characterized in that it is supported and accommodated in a honeycomb-type media. The method of claim 1, wherein the partial nitrous oxidation tank,
Water treatment apparatus, characterized in that accommodating aerobic ammonium oxidizing bacteria (Ammonium Oxidizing Bacteria, AOB) therein. The method of claim 8, wherein the ammonium oxidizing bacteria,
Nitrosomonas (Nitrosomonas) or Nitrosococcus (Nitrosococcus), characterized in that the water treatment device. The method of claim 8, wherein the ammonium oxidizing bacteria,
A water treatment apparatus, characterized in that it is supported and accommodated in a honeycomb-type media. delete delete delete In the water treatment method using the water treatment device according to any one of claims 1 and 3 to 10,
A first step of removing nitrogen contained in the supplied water to be treated;
A second step of removing phosphorus (P) contained in the water to be treated;
A third step of removing nitrogen contained in the water to be treated through an anamox reaction; And
Unreacted ammonium ions in the reaction process Ana Comox ammonium ions (NH ₄ ⁺⁾ nitrite ion ^- a fourth step of switching to (NO _2); and include,
By conveying a portion of the fourth process step coarse water to be treated to the denitrification reactor the nitrate ion (NO ₃ ^-) Step 5-1 to remove; (NO ₂ ^-) the nitrate ions to transport a portion of the coarse-treated four-step process to know Comox reactor first stage 5-2 for removing; And a 5-3 step of returning a part of the sludge that has undergone the fourth step process to a partial nitrous oxidation tank. The method of claim 14, wherein the first step,
A water treatment method, characterized in that nitrogen contained in the water to be treated is removed by reciprocating a membrane immersed in the water to be treated. The method of claim 14, wherein the second step,
A water treatment method, characterized in that phosphorus (P) contained in the water to be treated is removed using magnesium ions. delete delete delete

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