WO2021020653A1

WO2021020653A1 - Sewage treatment system using cip-sbr method

Info

Publication number: WO2021020653A1
Application number: PCT/KR2019/014573
Authority: WO
Inventors: 이병노; 조상수; 김봉실; 김영; 이진상; 서재식
Original assignee: 주식회사 대진환경산업
Priority date: 2019-07-26
Filing date: 2019-10-31
Publication date: 2021-02-04
Also published as: KR102124730B1

Abstract

The present invention is a sewage treatment system using a CIP-SBR method, whereby sewage is treated on the basis of a CIP-SBR method which is a nitrate nitrogen treatment-reinforced, continuous sewage inflow-type pseudo SBR method having an additional internal recycle process for sewage in order to stably maintain the concentration of nitrate nitrogen in effluent water.

Description

Sewage treatment system by the CIP-SBR method

The present invention relates to a sewage treatment system according to the CIP-SBR method, and in more detail, a similar SBR for nitrate nitrogen treatment enhanced sewage continuous injection type with an added internal transfer process of sewage to stably maintain the nitrate nitrogen concentration in the effluent. It relates to a system that treats sewage based on the CIP-SBR method (Continuous Inflow Pseudo Sequencing Batch Reactor).

There are various processes for the so-called advanced treatment of removing nitrogen and phosphorus from sewage, but most of the processes are modified based on the A2O (Anaerobic / Anoxic / Oxic) method consisting of an anaerobic tank, an anoxic tank and an aerobic tank.

On the other hand, the Sequencing Batch Reactor (SBR) method, which is widely applied in small and medium-sized sewage treatment facilities, is a change from the A2O method to the concept of space divided into reaction tanks such as anaerobic tank, anoxic tank, and aerobic tank to the concept of time. A method of biologically removing organic matter, nitrogen, and phosphorus in sewage under the anaerobic, aerobic, and oxygen-free conditions created by the sewage inflow process, reaction process, precipitation process, discharge process and rest process continuously progressing over time. to be. This SBR method has the advantage that all treatment processes are carried out in one reaction tank and does not require a separate sedimentation facility, so compared to other sewage treatment methods, the required area is small, and the control factor is also reduced, so operation is simple. It is widely used in treatment facilities.

However, due to the characteristics of batch operation, the SBR method requires a storage tank or a flow control tank to store sewage until the next sewage inflow process after inflow of sewage.In particular, sludge sedimentation due to the propagation of filamentous bacteria becomes a poor nutrient state that lacks organic matter as it goes to the rear of the reaction process. There is a problem of concern about defects.

Modified construction methods have been proposed to overcome the problems of the SBR construction method. One of them is a method of continuously injecting sewage by placing a separate small reactor in front of the SBR process. The representative method of this method is the Intermittent Cycle Extended Aeration System (ICEAS). In this ICEAS method, a pretreatment tank is provided at the front end of the main reaction tank to continuously inject sewage, and the sewage is transferred from the pretreatment tank to the main reaction tank through a hole located at the bottom of the baffle between the pretreatment tank and the main reaction tank. And unlike the operation cycle of the SBR method in which the inflow, reaction, precipitation, discharge and rest processes are repeated, the ICEAS method repeats the reaction, precipitation, and discharge processes because sewage is continuously injected.

As a prior art of the ICEAS method, Korean Patent Registration No. 10-1672022, "Sewage treatment method according to the SBAR method and an apparatus used therein" have been disclosed. The above-described prior art is a sewage treatment method according to the SBR method that includes an up booster with an up booster hole and a down booster with a down booster hole in the main reaction tank, and controls the flow of sewage passing through them obliquely upward or obliquely downward, and It relates to a device used for this.

In addition, Korean Patent No. 10-0436186, "Continuous injection intermittent aeration type sewage treatment apparatus and method" has been disclosed. The above prior art relates to a sewage treatment apparatus and method capable of removing nitrogen and more efficiently removing organic substances by inducing nitrification and denitrification reactions using an intermittent aeration reactor by continuous injection in a sewage treatment process. .

Meanwhile, as shown in Fig. 1, the operating cycle of the domestic and foreign basic ICEAS method is 4.8 hours with a reaction process of 2.8 hours, a precipitation process of 1 hour, and a discharge process of 1 hour, and the reaction process is 24 minutes. Periodically, an aerobic process in which air is supplied ("AIR ON" in FIG. 1) and an oxygen-free process in which air supply is stopped ("AIR OFF" in FIG. 1) are alternately repeated. That is, the exhalation process consists of 4 times and the anoxic process consists of 3 times.

In contrast, the operating cycle of the domestic and foreign emergency ICEAS method, which is operated in an emergency such as during a rainfall, is 3.6 hours as a reaction process 126 minutes, a precipitation process 45 minutes, and a discharge process 45 minutes, as shown in FIG. , The reaction process is performed alternately with an aerobic process (“AIR ON” in FIG. 1) and an oxygen-free process (“AIR OFF” in FIG. 2) alternately with a cycle of 18 minutes.

However, in the operation cycle of the ICEAS method described above, it takes a lot of time to convert to a pure oxygen-free state where oxygen is completely depleted after an aerobic state due to the operating characteristics of a single reactor, so there is a concern that the pure oxygen-free state will be kept substantially shorter than the set time. Is big. In addition, in general, it takes longer to convert ammonia nitrogen to nitrate nitrogen than the rate of decomposition of organic matter in sewage in aerobic conditions, and at low water temperature due to environmental influences such as winter, ammonia due to autotrophic microbial action Considering that conversion of nitrogen to nitrate nitrogen takes a lot of time, there is a problem in that it is difficult to control the concentration of nitrate nitrogen in the effluent under the operating conditions of the conventional ICEAS method.

Therefore, there is a need to develop a method that can replace the conventional ICEAS method and control the concentration of nitrate nitrogen for discharge.

The present invention was conceived to solve the above problems, and CIP-SBR, a similar SBR construction method of continuous sewage continuous injection type, enhanced nitrate nitrogen treatment with an added internal transfer process for sewage to stably maintain the nitrate nitrogen concentration in the effluent. Its purpose is to provide a sewage treatment system based on the CIP-SBR method that treats sewage based on the method.

Meanwhile, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. Can be.

As a technical means for achieving the above object, the sewage treatment system according to the CIP-SBR method according to an embodiment of the present invention includes a pretreatment reactor 110, a main treatment reactor 120, and a pretreatment reactor 110 and the main A reaction unit 100 provided with a baffle 130 having a laminar flow generating port 135 for the flow of sewage and partially partitioning the treatment reaction tank 120; A turbulence/short-circuit flow reduction inlet 200 provided in the pretreatment reaction tank 110 to allow sewage to flow into the pretreatment reaction tank 110, and to reduce turbulence and short-circuit flow of sewage; An internal transfer unit 300 provided in the baffle 130 and transferring sewage from the main treatment reaction tank 120 to the pretreatment reaction tank 110; A laminar flow guide unit 400 that is provided in plural in the main treatment reaction tank 120 and induces diffusion of sewage while preventing a short-circuit flow of sewage passing through the laminar flow generating port 135 to the internal conveying unit 300; An air diffuser 500 provided above the laminar flow guide 400 or in the space between the laminar flow guide 400; An underwater aeration unit 600 provided in the pretreatment reactor 110 and for supplying oxygen to the pretreatment reactor 110 and stirring the sewage of the pretreatment reactor 110; An underwater stirring unit 700 provided in the main treatment reaction tank 120 and for agitating the sewage of the main treatment reaction tank 120; And a discharge unit 800 provided in the main treatment reaction tank 120 and for discharging the supernatant water of the main treatment reaction tank 120 from which the suspended material is removed to the discharge port.

And the turbulence/short-circuit flow reduction inlet 200 is installed in the fall inlet passage through which sewage falls and inflows, and a collision plate that reduces the turbulence of sewage by decelerating the falling speed of sewage through collision with the falling sewage. 210); And it is formed in plural at the end of the discharge passage through which sewage decelerated by the collision plate 210 is discharged, and discharges the sewage to the pretreatment reactor 110 at a position spaced apart from the laminar flow generating port 135 to prevent short circuit flow of sewage. It includes; a sewage outlet 220 to reduce.

In addition, the collision plate 210 is spaced apart from the inner wall of the fall inlet passage and is installed in plural in the fall inlet passage, and the sewage falling in and out is decelerated by the collision, and the reduced sewage is a first fall that is a gap with the inner wall. A first collision plate 211 to fall downward through the sphere 212; And a plurality of installed on the inner wall of the first collision plate 211 and the fall inlet passage at the intersection, and the sewage reduced by the first collision plate 211 is further decelerated by the collision, and the reduced sewage is formed in the center. It includes; a second collision plate 213 to fall downward through the second dropping port 214 that becomes.

And the internal transfer unit 300, in a process other than the internal transfer process of returning the main treatment reactor 120, the sewage to the pretreatment reactor 110, the sewage of the main treatment reactor 120 is returned to the pretreatment reactor 110 It includes; a non-return valve 310 for blocking it.

In addition, the laminar flow guide unit 400 has one end in contact with the laminar flow generating port 135 and the other end extends so as to contact the sidewall of the main treatment reactor 120 in which the discharge unit 800 is installed, A plurality of diffusion openings 405 are formed to diffuse the sewage flowing into the 120 from the lower side of the main treatment reactor 120.

And, as the laminar flow guide part 400 goes from one end to the other end, the diameter of the diffusion hole 405 increases.

In addition, the underwater aeration unit 600 sucks outside air during the aerobic process to supply oxygen to the pretreatment reactor 110 and stirs the sewage of the pretreatment reactor 110 through oxygen, but during the anoxic process, the pretreatment reactor 110 The sewage is physically stirred.

In addition, the acid gas unit 500 sucks outside air during the aeration process to supply oxygen to the main treatment reactor 120 and stir the sewage of the main treatment reactor 120 through oxygen.

In addition, the underwater stirrer 700 physically agitates the sewage of the main treatment reactor 120 during an oxygen-free process.

And the reaction unit 100, after the sewage inflow process, the aerobic process and the oxygen-free process of the main treatment reactor 120 are alternately repeated before the precipitation process, and the time of the aerobic process is set longer than the time of the oxygen-free process.

In addition, in the internal transfer unit 300, the internal transfer process of returning the sewage from the main treatment reaction tank 120 to the pretreatment reaction tank 110 is performed for the rest of the aerobic processes except for the first aeration process after the sewage inflow process and the aerobic process before the precipitation process. .

Further, the discharge unit 800 discharges supernatant water to the outside while floating in the sewage of the main treatment reactor 120.

According to an embodiment of the present invention, by adopting the CIP-SBR method, which performs the internal conveying process of sewage instead of the conventional ICEAS method, it is easy to control the concentration of discharge-related nitrate nitrogen, which is difficult in the conventional ICEAS method. have.

And according to an embodiment of the present invention, by setting the aerobic process reaction time of the main treatment reactor to be longer than the oxygen-free process reaction time, a sufficient reaction time for converting ammonia nitrogen in sewage to nitrate nitrogen can be provided.

In addition, according to an embodiment of the present invention, by setting the reaction time of the oxygen-free process of the CIP-SBR method to be longer than that of the oxygen-free process of the conventional ICEAS method, anaerobic conditions for phosphorus removal after the nitrate nitrogen is removed. To proceed.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

1 is a diagram showing a driving cycle of a conventional domestic and international basic ICEAS method.

2 is a diagram showing a driving cycle of a conventional domestic and overseas emergency ICEAS method.

3 is a schematic diagram showing a sewage treatment system according to the CIP-SBR method according to an embodiment of the present invention.

4 is a side view showing a sewage inlet according to an embodiment of the present invention.

5 is a side view showing the flow of sewage flowing along the sewage inlet according to an embodiment of the present invention.

6 is a plan view showing a collision plate according to an embodiment of the present invention.

7 is a block diagram showing the configuration of an internal transport unit according to an embodiment of the present invention.

8 is a perspective view showing a laminar flow guide according to an embodiment of the present invention.

9 is a side view showing the flow of sewage flowing into the main treatment reaction tank excluding the laminar flow guide unit according to an embodiment of the present invention.

10 is a plan view showing a discharge unit according to an embodiment of the present invention.

11 is a side view showing a discharge unit according to an embodiment of the present invention.

12 is a flowchart showing a process sequence of the CIP-SBR method according to an embodiment of the present invention.

13 is a view showing a driving cycle of the CIP-SBR method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be modified in various ways and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only those effects, the scope of the present invention should not be understood as being limited thereto.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to specified features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in a commonly used dictionary should be interpreted as having the meaning of the related technology in context, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

<구성><Configuration>

Hereinafter, the configuration of the sewage treatment system 10 according to the CIP-SBR method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a schematic diagram showing a sewage treatment system according to the CIP-SBR method according to an embodiment of the present invention, Figure 4 is a side view showing a sewage inlet according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention It is a side view showing the flow of sewage flowing along the sewage inlet according to the embodiment, Figure 6 is a plan view showing a collision plate according to an embodiment of the present invention, Figure 7 is an internal conveyance unit according to an embodiment of the present invention It is a block diagram showing the configuration, and FIG. 8 is a perspective view showing a laminar flow guide according to an embodiment of the present invention, and FIG. 9 is a flow of sewage flowing into the main treatment reactor excluding the laminar flow guide according to an embodiment of the present invention. 10 is a plan view showing a discharge unit according to an embodiment of the present invention, and FIG. 11 is a side view showing a discharge unit according to an embodiment of the present invention.

The sewage treatment system 10 according to the CIP-SBR method according to an embodiment of the present invention is a nitrate nitrogen treatment enhanced sewage continuous injection type with an added internal transfer process of sewage to stably maintain the nitrate nitrogen concentration in the effluent. It is a system that treats sewage based on the CIP-SBR (Continuous Inflow Pseudo Sequencing Batch Reactor) method, a similar SBR construction method.

The sewage treatment system 10 according to the CIP-SBR method includes a reaction unit 100, an inlet unit 200, an internal transfer unit 300, a laminar flow guide unit 400, an air diffuser unit 500, and an underwater aeration unit ( 600), an underwater stirring unit 700, a discharge unit 800 and a control unit 900 are provided.

The reaction unit 100 performs sewage treatment by microorganisms included in the sludge, and the sewage is separated into treated water and sludge by the sewage treatment. Here, the treated water refers to the portion remaining after the sludge is settled after pollutants such as nitrogen and phosphorus are removed from the sewage.

The reaction unit 100 is provided with a pretreatment reaction tank 110, a main treatment reaction tank 120, and a baffle 130 to perform the above sewage treatment.

The pretreatment reaction tank 110 is a reaction tank provided at the front end of the reaction unit 100 and performs sewage treatment in which the sewage discharged from the turbulent/short flow reduction inlet 200 is separated into treated water and sludge. This pretreatment reactor 110 occupies 15 to 25% of the total reactor capacity, and this is to manage stable discharged water quality.

The main treatment reaction tank 120 is a reaction tank provided at the rear end of the pretreatment reaction tank 110 with the baffle 130 interposed therebetween, which separates the sewage of the pretreatment reaction tank 110 passing through the baffle 130 into treated water and sludge. Sewage treatment takes place. This main treatment reactor 120, as the pretreatment reactor occupies 15 to 25% of the total reactor capacity, occupies 85 to 75% of the total capacity of the reactor, the length: width ratio may be 3:1. .

The baffle 130 has a plurality of laminar flow generating ports 135 through which sewage from the pretreatment reaction tank 110 flows to the main treatment reaction tank 120 is formed at the lower side.

These baffles 130 allow the pretreatment reactor 110 and the main treatment reactor 120 to be partially partitioned.

In addition, the baffle 130 is not shown in the drawing, but a conveying port (not shown) for conveying the sewage of the main treatment reactor 120 to the pretreatment reactor 110 through the internal conveyance unit 300 provided on the sidewall. Is formed.

The turbulence/short-circuit reduction inlet 200 is provided in the pre-treatment reactor 110 to allow sewage to flow into the treatment reactor 110, and is a device specially designed to reduce turbulence and short-circuit flow due to the inflow of sewage. A plate 210 and a sewage outlet 220 are provided.

The collision plate 210 is installed in the fall inlet passage through which sewage falls and inflows among passages through which sewage is introduced into the pretreatment reactor 110, and reduces the falling speed of sewage through collision with the sewage flowing in and down, and the sewage outlet It is provided as a first collision plate 211 and a second collision plate 213 for reducing turbulence of sewage to be discharged to the pretreatment reaction tank 110 through 220.

The first collision plate 211 is spaced apart from the inner wall of the fall inlet passage, but is installed at an intersection with the second collision plate 213 in the fall inlet passage, and the sewage falling in and out from the outside is decelerated by collision or the second collision After being decelerated by the plate 213, the sewage falling down is further decelerated. The first collision plate 211 allows sewage decelerated by the collision to fall downward through the first drop opening 212 which is a gap between the inner wall of the fall inlet passage.

The second collision plate 213 is installed in the fall inlet passage at the intersection with the first collision plate 211, and allows the sewage passing through the first collision plate 211 to be further decelerated due to the collision. The second collision plate 213 allows the sewage, which is further decelerated by the collision, to fall downward through the second drop port 214 formed in the center.

The sewage discharge port 220 is formed in plural at the end of the discharge passage through which sewage decelerated through the first collision plate 211 and the second collision plate 213 is discharged from among the passages, and the reduced sewage is sequentially pretreated in a reaction tank ( 110).

Furthermore, it would be desirable that the sewage outlet 220 is formed at a position spaced apart from the laminar flow generator 135 as far as possible in the passage. This means that even if the sewage falling and flowing from the outside is decelerated by the first collision plate 211 and the second collision plate 213, a short-circuit flow that can flow to the laminar flow generating port 135 within a time shorter than the residence time is Because it can occur.

The internal conveyance unit 300 is provided on the sidewall of the baffle 130 and allows the sewage from the main treatment reactor 120 to be internally conveyed to the pretreatment reactor 110 during the internal conveyance process.

Here, it is understood that the sewage of the main treatment reactor 120 that is internally conveyed passes through a conveyance port (not shown) formed in the baffle 130 through the internal conveyance unit 300 and is internally conveyed to the pretreatment reactor 110. Would be desirable.

And the internal conveyance part 300 is a baffle 130 spaced apart from the laminar flow generating port 135 in accordance with 50 to 65% of the full water level of the main treatment reactor 120 which is slightly below the height of the sewage after the discharge process is completed. It is installed on the side wall. This maximizes the formation of a short-circuit flow in which sewage flowing from the pretreatment reaction tank 110 to the main treatment reaction tank 120 can be returned to the pretreatment reaction tank 110 through the internal transfer unit 300 in a process other than the internal transfer process. It is to suppress.

In addition, the internal transfer unit 300 is provided with a non-return valve 310 that blocks the transfer of the sewage from the main treatment reactor 120 to the pretreatment reactor 110 in processes other than the internal transfer process.

The non-return valve 310 opens a transfer port (not shown) in the internal transfer process by the control unit 900 so that the sewage from the main treatment reaction tank 120 is transferred to the pretreatment reaction tank 110, other than the internal transfer process. In the process, the transfer port (not shown) is closed to prevent the sewage from the main treatment reactor 120 from being returned to the pretreatment reactor 110.

The laminar flow guide unit 400 is provided in plural in the main treatment reaction tank 120, one end of which is in contact with the laminar flow generation port 135, and the other end of the side wall of the main treatment reaction tank 120 in which the discharge unit 800 is installed. By extending so as to be in contact, a short-circuit flow of sewage passing through the laminar flow generating port 135 to the internal conveyance unit 300 is prevented.

And the laminar flow guide unit 400 is to diffuse from the lower side of the main treatment reaction tank 120, the sewage that continues to flow during the precipitation process and the discharge process in which agitation by the aeration unit 500 and the underwater agitator 700 does not occur. A plurality of diffusion holes 405 are formed.

Unlike shown in the drawing, the diffusion hole 405 increases in diameter from one end to the other end. For example, the diameter of the diffusion hole 405b at the other end is larger than that of the diffusion hole 405a at one end. This is to prevent disturbance of the sludge layer settled under the main treatment reaction tank 120 as much as possible, and to extend the streamline to the discharge part 800 of the sewage passing through the laminar flow generating port 135 as much as possible during the discharge process. to be. In addition, it is to suppress the generation of immersed sludge that is not stirred while the aeration unit 500 is operated.

As such, the laminar flow guide 400 may be provided in the main treatment reactor 120 by itself, unlike shown in the drawings.

The diffuser 500 is provided on the upper side of the laminar flow guide 400 when the laminar flow guide 400 is provided alone, and the laminar flow guide 400 when a plurality of laminar flow guides 400 are provided It is provided in the space between.

When a plurality of laminar flow guides 400 are provided, the air diffuser 500 is installed in the main treatment reactor 120 at the same height as the laminar flow guide 400. This is to prevent the supply of oxygen by the laminar flow guide 400 by the laminar flow guide 400 during the process of supplying oxygen to the main treatment reactor 120 by sucking air from the outside during the exhalation process. to be.

In addition, the acid gas unit 500 supplies oxygen to the main treatment reactor 120 during the aerobic process, and agitates the sewage of the main treatment reactor 120 using oxygen supplied to the main treatment reactor 120. However, the air diffuser 500 is not operated during the anoxic process.

The underwater aeration unit 600 sucks air from the outside during the aerobic process to supply oxygen to the pretreatment reactor 110, and agitates the sewage of the pretreatment reactor 110 using oxygen supplied to the pretreatment reactor 110.

In addition, the underwater aeration unit 600 agitates the sewage of the pretreatment reaction tank 110 during the oxygen-free process. Here, the underwater aeration unit 600 agitates the sewage of the pretreatment reactor 110 using a physical action other than oxygen. To this end, the underwater aeration unit 600 is provided with a stirring blade (not shown) rotated by the control unit 900.

That is, in the pretreatment reactor 110, oxygen is supplied and oxygen-based agitation is performed during the aerobic process by the underwater aeration unit 600, and physical action-based agitation is performed during the oxygen-free process.

The underwater stirrer 700 agitates the sewage of the main treatment reactor 120 during the oxygen-free process. Here, the underwater stirrer 700 agitates the sewage of the main treatment reactor 120 using a physical action other than oxygen. To this end, the underwater stirring unit 700 is provided with a stirring blade (not shown) rotated by the control unit 900.

That is, in the main treatment reactor 120, oxygen is supplied and oxygen-based agitation is performed during the aerobic process by the aeration unit 500, and physical action-based agitation is performed during the oxygen-free process by the underwater agitation unit 700.

The discharge unit 800 is installed on the side wall of the main treatment reactor 120 and is suspended in the sewage of the main treatment reactor 120, and discharges supernatant water that does not exceed the discharge standard while blocking the inflow of suspended substances to the outside. As an apparatus, a chamber 810, an upper water weir part 820, an air inflow and inlet 830, a floating body 840, a turbidity sensor 850, and a bottom plate opening and closing part 860 are provided.

The chamber 810 together with the supernatant water weir part 820 form an inlet area into which supernatant water is introduced, a flow area through which supernatant water flows, and a discharge area through which supernatant water is discharged to the outside.

The chamber 810 is provided with a first wall 811 and a second wall 813 for forming a flow zone of the supernatant water together with the supernatant weir part 820.

The first wall 811 extends from the top to the bottom of the chamber 810 and is spaced apart from the second wall 813 at a predetermined interval.

And the first wall 811 is in contact with the rotation stop member 864 according to the rotation of the opening and closing member 861 provided in the bottom plate opening and closing portion 860 to be described later, and the opening and closing member 861 together with the rotation stop member 864 ) To stop the rotation.

The second wall 813 is formed extending from the top to the bottom of the chamber 810 and is spaced apart from the first wall 811 at a predetermined interval.

The first and

second walls

811 and 813 are provided with a supernatant weir part 820 in a space spaced between each other, and together with the supernatant weir part 820, a flow zone of supernatant water is formed. And in the supernatant water flow zone, supernatant water is dividedly flowed by the first and

second walls

811 and 813 and the supernatant weir part 820.

The supernatant weir part 820 is an inlet area through which supernatant water flows into the chamber 810 together with the side housing of the chamber 810 or the first and

second walls

811 and 813, and the supernatant water is inside the chamber 810. A first supernatant weir 821, a second supernatant weir 823 and a third supernatant weir 825 are provided in order to form a flow area for flowing and a discharge area for discharging supernatant water from the chamber 810.

The first supernatant weir 821 forms an inlet zone through which supernatant water is introduced into the chamber 810 together with the housing at one side of the chamber 810. Specifically, the first supernatant weir 821 is spaced apart from the housing of one side of the chamber 810 by a predetermined distance, and this spaced space serves as a supernatant water inlet so that supernatant water is introduced.

The second supernatant weir 823 forms a flow zone through which supernatant water flows inside the chamber 810 together with the first and

second walls

811 and 813. Specifically, the second supernatant weir (823) is spaced apart from the first wall (811) and the second wall (813) at a predetermined interval, respectively, and is formed extending in a direction opposite to the first and second walls (811, 813) Make the supernatant water flow partitioned.

And the lower end of the second supernatant weir 823 is in contact with the opening and closing member 861 according to the angle at which the opening and closing member 861 is rotated. There is a possibility that the lower end or the opening and closing member 861 of the second supernatant weir 823 may be damaged by such contact. In order to eliminate the fear of such damage, a rubber packing 824 is provided at the lower end of the second supernatant weir 823 to prevent the opening and closing member 861 from being damaged by collision with the opening and closing member 861.

The third supernatant weir 825 forms a discharge zone through which supernatant water is discharged from the chamber 810 together with the housing on the other side of the chamber 810. Specifically, the third supernatant weir 825 is spaced apart from the other side housing of the chamber 810 by a predetermined distance, and this spaced space serves as a supernatant water outlet so that supernatant water is discharged through the discharge port toward the supernatant water discharge pipe.

In addition, the lower end of the third supernatant weir 825 is in contact with the rubber packing 865 to be described later provided at the end of the opening and closing member 861 according to the angle at which the opening and closing member 861 is rotated. The rotation of the opening and closing member 861 together with the wall 811 and the rotation stopping member 864 is stopped.

Further, the lower end of the third supernatant weir 825 is made to be inclined in a direction in which the diameter of the supernatant water outlet is reduced in order to stop the rotation of the opening and closing member 861.

Here, at the lower end of the third supernatant weir 825, the diameter of the supernatant water outlet is reduced toward the discharge direction of supernatant water, thereby increasing the flow rate of supernatant water flowing from the supernatant water outlet to the discharge pipe through the supernatant water discharge pipe. have.

The air inflow and inlet 830 is provided on the upper side of the chamber 810 to allow air to flow into or out of the chamber 810.

The floating body 840 is coupled to the remaining side portions of the chamber 810 except for one side portion where the inlet zone of the chamber 810 is provided, and through the injection or discharge of compressed air, the chamber 810 is A compressed air inlet 841 and a compressed air outlet 843 are provided in order to float from the sewage to the discharge periodic water level (B) or the periodic water level outside the discharge (C).

The compressed air injection port 841 is connected to a compressed air injection device (not shown) operated by the control unit 900 and allows compressed air from the compressed air injection device (not shown) to be injected into the floating body 840.

Here, the compressed air is injected into the floating body 840 through the compressed air inlet 841 to allow the chamber 810 to float from the discharge period level (B) to the non-discharge period level (C), When compressed air is injected into the floating body 840 through the compressed air inlet 841, the turbidity sensor 850 detects that the turbidity of the supernatant water inside the chamber 810 is higher than a preset value, and the detection information Is when is created.

On the other hand, when the chamber 810 is floated from the discharge period water level (B) to the non-discharge period water level (C) by the float 840, the supernatant water does not pass through the first supernatant weir (821), and the chamber 810 ) Does not flow into the interior.

That is, when the chamber 810 is floated from the discharge periodic water level (B) to the periodic water level (C) other than the discharged by the floating body 840, the supernatant water is blocked from flowing into the interior.

The compressed air outlet 843 is connected to a compressed air discharge device (not shown) operated by the control unit 900, and allows the compressed air inside the floating body 840 to be discharged through the compressed air discharge device (not shown). .

Here, the compressed air is discharged from the floating body 840 through the compressed air outlet 843 to allow the chamber 810 to float from the non-discharging periodic water level (C) to the discharged periodic water level (B), and compressed air When the air is discharged from the floating body 840 through the compressed air outlet 843, the turbidity sensor 850 does not generate sensing information and the flow zone of the chamber 810 is closed or the turbidity sensor 850 detects information. It is time when the generation of the sensing information is terminated after generating the, and the opening and closing member 861 completely closes the open flow zone through rotation.

In this way, when the chamber 810 is floated from the non-discharge periodic water level (C) to the discharge periodic water level (B) by the float 840, the supernatant water is the first supernatant water weir 821, which is the inlet region of the chamber 810. ) And flows into the flow zone formed through the first and second walls (811, 813) and the second supernatant weir (823).

In addition, the floating body 840 floats the chamber 810 at the discharge periodic water level (B) or the non-discharge periodic water level (C) so that only supernatant water flows into the interior of the chamber 810, so that the sewage of the main treatment reactor 120 It blocks the inflow of the precipitated material to the interior of the chamber 810.

The turbidity sensor 850 generates sensing information on the supernatant water when the turbidity of the supernatant water containing the suspended material that may flow into the chamber 810 is equal to or higher than a predetermined value in the control unit 900. In order to detect the turbidity of the supernatant water flowing in the flow area of the chamber 810, the turbidity sensor 850 is preferably provided on one side of the second supernatant weir 823 constituting the flow area of the chamber 810. .

That is, the turbidity sensor 850 is provided to block a suspension material having a predetermined turbidity or higher, which may be included in the supernatant water flowing into the chamber 810, from being discharged to the outside.

In the present invention, the turbidity sensor 850 may be replaced with a sensor that measures or detects DO, pH, MLSS, temperature, etc. of supernatant water, not turbidity of supernatant water. In addition, the turbidity sensor 850 may be provided with a plurality of sensors that measure turbidity, DO, pH, MLSS, temperature, and the like, not one sensor.

The bottom plate opening/closing unit 860 discharges supernatant water flowing in the flow zone of the chamber 810 to the main treatment reaction tank 120 or flows in the flow zone of the chamber 810 depending on whether the controller 900 receives the sensing information. An opening and closing member 861, a rotation shaft 862, a motor 863, a rotation stop member 864, and a rubber packing 865 are provided to discharge the supernatant water to the discharge area and the discharge port of the chamber 810.

The opening and closing member 861 keeps the lower side of the chamber 810 open or open to prevent the suspended material suspended in the supernatant water from being discharged to the outside, or the supernatant water flows to the discharge area and the discharge port of the chamber 810 To ensure that the lower side of the chamber 810 is closed or kept closed.

The opening and closing member 861 has one end coupled with a rotation shaft 862 coupled to the lower end of the first supernatant weir 821, and a rubber packing 865 contacting the lower end of the third supernatant weir 825 is provided at the other end. do.

The rotation shaft 862 is coupled to one end of the opening and closing member 861, and rotates the opening and closing member 861 so that the opening and closing member 861 opens or closes the lower side of the chamber 810.

The motor 863 is connected to the rotation shaft 862, and when the controller 900 receives the sensing information, it is controlled by the controller 900 to generate a driving force to rotate the rotation shaft 862 so that the rotation shaft 862 rotates. Make it possible.

The rotation stop member 864 is formed extending from the rotation shaft 862, and the rotation of the opening and closing member 861 is stopped through contact with the first wall 811 according to the rotation of the rotation shaft 862. It blocks the opening of the flow zone beyond the preset width (A).

The rubber packing 865 is a third supernatant weir in order to prevent the opening and closing member 861 or the third supernatant weir 825 from being damaged by a collision between the other end of the opening and closing member 861 and the third supernatant weir 825. 825) is provided at the other end.

Hereinafter, examples of using the discharge unit 800 in a closed state and an open state of the lower side of the chamber 810 will be described in detail.

First, when an example of use in a state in which the lower side of the chamber 810 is closed will be described, the turbidity sensor 850 includes the turbidity of the supernatant water flowing in the flow zone of the chamber 810 less than or equal to a value preset by the control unit 900. When detecting the turbidity and not generating the detection information, the control unit 900 does not receive the detection information from the turbidity sensor 850.

In addition, when the chamber 810 is suspended at the periodic water level C other than the discharge, the compressed air discharge device (not shown) is controlled to allow the compressed air of the floating body 840 to pass through the compressed air discharge port 843. By being discharged from the floating body 840 through, the chamber 810 is allowed to float at the discharge period water level (B).

In contrast, the control unit 900 maintains the current state when the chamber 100 is suspended at the discharge period water level B.

In addition, when the lower side of the chamber 810 is opened while the chamber 800 is floating at the periodic water level C other than discharge, the control unit 500 controls the motor 863 to rotate the opening and closing member 861 to rotate the chamber ( The lower side of the 810 is closed, and compressed air is discharged from the floating body 840 by controlling the compressed air discharge device (not shown), so that the chamber 810 is suspended at the discharge period level B.

In contrast, the control unit 900 maintains the current state when the lower side of the chamber 810 is closed while the chamber 810 is suspended at the discharge period level B.

On the other hand, when explaining the use of the lower side of the chamber 810 is open, the turbidity sensor 850 is the turbidity of the supernatant water flowing in the flow zone of the chamber 810 is equal to or greater than a predetermined value by the control unit 900. When detecting and generating detection information, the control unit 900 receives the detection information generated from the turbidity sensor 850.

In addition, when the chamber 810 is suspended at the discharge period level B, the control unit 900 controls the compressed air injection device (not shown) to inject compressed air into the floating body 840 so that the chamber 810 is It is allowed to float at the periodic water level (C) outside of discharge.

In contrast, the controller 900 maintains the current state when the chamber 810 is suspended at the periodic water level C other than the discharge.

In addition, when the lower side of the chamber 810 is closed while the chamber 100 is suspended at the discharge period level B, the control unit 900 controls the motor 863 to rotate the opening and closing member 861 to rotate the chamber 810 Make the lower side of) open. In particular, the motor 863 is controlled so that the lower side of the chamber 810 is opened up to a preset width A.

In contrast, the controller 900 maintains the current state when the lower side of the chamber 810 is opened with a preset width A while the chamber 810 is floating at the periodic water level C other than the discharge.

<공정 순서 및 운전 주기><Process sequence and operation cycle>

Hereinafter, a process sequence and operation period of the CIP-SBR method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

12 is a flowchart showing a process sequence of the CIP-SBR method according to an embodiment of the present invention, and FIG. 13 is a view showing a driving cycle of the CIP-SBR method according to an embodiment of the present invention.

First, sewage with reduced turbulence and short-circuit flow is introduced into the pretreatment reaction tank 110 through the turbulence/short-circuit reduction inlet 200 (S10).

After the sewage inflow process (S10), the acid gas unit 500 agitates the sewage of the main treatment reaction tank 120 based on oxygen supply and oxygen to the main treatment reaction tank 120, and the underwater aeration part 600 is a pretreatment reaction tank ( An aerobic process of supplying oxygen to 110) and stirring the sewage of the pretreatment reactor 110 based on oxygen is performed (S20).

After the aeration process (S20), the underwater agitation unit 700 agitates the sewage of the main treatment reactor 120 with a stirring blade (not shown), and the aeration unit 600 is a stirring blade for the sewage of the pretreatment reaction tank 110 An oxygen-free process of stirring (not shown) is performed (S30).

In the aerobic process (S20) and the oxygen-free process (S30), one or more aerobic processes (S40, S70) and an oxygen-free process (S60) are performed for sewage treatment. In the process sequence of the present invention, it has been described that the aerobic process is performed 3 times and the anoxic process is performed 2 times, but in the operating cycle of the preferred CIP-SBR method of the present invention, the aerobic process is performed 4 times and the oxygen free process is performed 3 times, and the aerobic process In the last one of them, the reaction time may be set short to remove organic matter.

Furthermore, when the aerobic process is performed multiple times, the sewage of the main treatment reactor 120 is transferred to the internal conveying unit 300 in the aerobic process except for the first aerobic process after the sewage inflow process and the aerobic process before the precipitation process. Through the internal transfer process is carried out to return to the pretreatment reaction tank 110 (S50).

After the aeration process (S70), the aeration unit 500, the underwater aeration unit 600, and the underwater agitation unit 700 are not operated, through which the sewage of the pretreatment reactor 110 and the main treatment reactor 120 is settled. The precipitation process is performed (S80).

After the precipitation step (S80), the discharge unit 800 discharges the supernatant water from the main treatment reactor 120 treated with sewage while floating in the main treatment reactor 120 (S90).

As shown in the figure, the operating cycle of the CIP-SBR method of the present invention is 5.5 hours with a reaction process of 4 hours, a precipitation process of 1 hour, and a discharge of 0.5 hours, and the reaction process is 42 minutes. The exhalation process with a cycle of 3 times and the exhalation process with a cycle of 24 minutes are repeated alternately with an anoxic process with a cycle of 1 and 30 minutes.

In the operation cycle of the CIP-SBR method, the aerobic process of the main treatment reactor 120 is set longer than the reaction time of the oxygen-free process, in order to convert ammonia nitrogen in the sewage of the main treatment reactor 120 into nitrate nitrogen. This is to give a sufficient reaction time.

In addition, since the last aerobic process of the main treatment reactor 120 proceeds with the main purpose of removing organic matter, the reaction time of the other aerobic processes proceeds shorter.

In the oxygen-free process of the main treatment reactor 120, the reaction time of the oxygen-free process is set longer than that of the conventional ICEAS method shown in FIGS. 1 and 2. This is to not only consider the time required for conversion to complete oxygen-free conditions after the aerobic process time is over, but also to allow the anaerobic conditions for phosphorus removal after the nitrate nitrogen is removed.

On the other hand, during the operation cycle of the CIP-SBR method of the present invention, the internal transfer process is performed for the last 12 minutes of the aerobic process except for the first aerobic process of the main treatment reactor 120 and the last aerobic process before the precipitation process. At this time, the pretreatment reaction tank 110 is converted to an oxygen-free process while the supply of oxygen from the underwater aeration unit 600 is stopped for internal transfer. In other words, in the pretreatment reactor 110, the reaction time of the first aerobic process and the last aerobic process before the precipitation process is 30 minutes, and the reaction time of the anoxic process increases as much as the reaction time of the reduced aerobic process, unlike the main treatment reactor 120. Except for the first anoxic process, the reaction time of the rest of the anoxic process is maintained for 42 minutes.

Detailed description of the preferred embodiments of the present invention disclosed as described above has been provided to enable those skilled in the art to implement and implement the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, a person skilled in the art may use the components described in the above-described embodiments in a manner that combines them with each other. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, an embodiment may be configured by combining claims that do not have an explicit citation relationship in the claims or may be included as a new claim by amendment after filing.

Claims

The pretreatment reactor 110, the main treatment reactor 120, and the pretreatment reactor 110 and the main treatment reactor 120 are partially partitioned, and a laminar flow generator 135 for the flow of sewage is formed. The reaction unit 100 is provided;

A turbulence/short-circuit flow reduction inlet 200 provided in the pre-treatment reaction tank 110 to allow sewage to flow into the pre-treatment reaction tank 110 and to reduce turbulence and short-circuit flow of the sewage;

An internal transfer unit 300 provided in the baffle 130 and transferring the sewage from the main treatment reaction tank 120 to the pretreatment reaction tank 110;

A laminar flow guide unit 400 that is provided in plural in the main treatment reaction tank 120 and induces diffusion of the sewage while preventing a short-circuit flow of sewage passing through the laminar flow generating port 135 to the internal conveying unit 300 );

An air diffuser 500 provided above the laminar flow guide 400 or in a space between the laminar flow guide 400;

An underwater aeration part 600 provided in the pretreatment reactor 110 and supplying oxygen to the pretreatment reactor 110 and stirring the sewage of the pretreatment reactor 110;

An underwater stirrer 700 provided in the main treatment reaction tank 120 and for stirring the sewage of the main treatment reaction tank 120; And

Sewage according to the CIP-SBR method, comprising: a discharge unit 800 provided in the main treatment reaction tank 120 and for discharging the supernatant water of the main treatment reaction tank 120 from which the suspended material is removed to the discharge port. Processing system.
The method of claim 1,

The turbulence / short-circuit flow reduction inlet portion 200,

A collision plate 210 installed in a fall inlet passage through which the sewage falls and inflows, and reduces the turbulence of the sewage by decelerating the falling speed of the sewage through collision with the sewage flowing in and falling; And

The sewage is formed in plural at the end of the discharge passage through which the sewage reduced by the collision plate 210 is discharged, and the sewage is discharged to the pretreatment reactor 110 at a position spaced apart from the laminar flow generating port 135 to discharge the sewage. Sewage treatment system according to the CIP-SBR method, comprising a; sewage outlet 220 to reduce the short circuit of the.
The method of claim 2,

The collision plate 210,

A first drop opening 212 that is spaced apart from the inner wall of the drop inlet passage, is installed in a plurality of the drop inlet passages, and allows the falling sewage to be decelerated by collision, and the reduced sewage is a gap with the inner wall A first collision plate 211 to fall down through the first collision plate 211; And

The first collision plate 211 is installed in a plurality on the inner wall of the fall inlet passage at the intersection, and the sewage reduced by the first collision plate 211 is further reduced by collision, and the further reduced sewage is central The sewage treatment system according to the CIP-SBR method, comprising a; a second collision plate 213 to fall downward through the second drop opening 214 formed in the.
The method of claim 1,

The internal transfer unit 300,

In a process other than the internal transfer process of returning the sewage from the main treatment reactor 120 to the pretreatment reactor 110, prevent backflow to block the sewage from the main treatment reactor 120 from being returned to the pretreatment reactor 110 Valve 310; Sewage treatment system according to the CIP-SBR method comprising a.
The method of claim 1,

The laminar flow guide part 400,

One end is in contact with the laminar flow generating port 135, and the other end extends to contact the sidewall of the main treatment reactor 120 in which the discharge unit 800 is installed, so that the sewage flowing into the main treatment reactor 120 Sewage treatment system according to the CIP-SBR method, characterized in that a plurality of diffusion holes 405 are formed to diffuse from the lower side of the main treatment reaction tank 120.
The method of claim 5,

The laminar flow guide part 400,

Sewage treatment system according to the CIP-SBR method, characterized in that the diameter of the diffusion hole 405 increases as it goes from the one end to the other end.
The method of claim 1,

The underwater aeration part 600,

During the aerobic process, external air is sucked to supply oxygen to the pretreatment reactor 110 and the sewage of the pretreatment reactor 110 is stirred through the oxygen, but during the anoxic process, the sewage of the pretreatment reactor 110 is physically stirred. Sewage treatment system according to the CIP-SBR method, characterized in that.
The method of claim 1,

The acid base 500 is,

Sewage treatment system according to the CIP-SBR method, characterized in that during the aeration process, external air is sucked to supply oxygen to the main treatment reactor 120 and the sewage of the main treatment reactor 120 is stirred through the oxygen.
The method of claim 8,

The underwater stirring unit 700,

Sewage treatment system according to the CIP-SBR method, characterized in that during the oxygen-free process, the sewage in the main treatment reactor 120 is physically stirred.
The method of claim 1,

The reaction unit 100,

After the sewage inflow process, the aerobic process and the oxygen-free process of the main treatment reactor 120 are alternately repeated until the precipitation process, and the time of the aerobic process is set longer than the time of the oxygen-free process. Sewage treatment system by.
The method of claim 10,

The internal transfer unit 300,

CIP-, characterized in that the internal transfer process of returning the sewage from the main treatment reactor 120 to the pretreatment reactor 110 is performed for each aerobic process except for the first aeration process after the sewage inflow process and the aeration process before the precipitation process. Sewage treatment system by SBR method.
The method of claim 1,

The discharge unit 800,

A sewage treatment system according to the CIP-SBR method, characterized in that while floating in the sewage of the main treatment reactor 120, the supernatant water is discharged to the outside.