KR100641828B1 - Apparatus and method for purifying contaminated rivers and lakes - Google Patents

Abstract

An apparatus for purifying contaminated water of rivers, lakes and marshes, which can solve a blocking problem of filter media and separation and loss problems of sludge after biological treatment by adopting a hydrodynamic separator with an inclined plate as a pretreatment equipment and comprising multi-aeration tanks with a media layer, and a posttreatment equipment, and a method for purifying contaminated water of rivers, lakes and marshes using the apparatus are provided. An apparatus for purifying contaminated water of rivers, lakes and marshes comprises: a hydrodynamic separator(10) with an inclined plate comprising a cylindrical swirl flow chamber for rotating influent, an inflow part formed at one side of the swirl flow chamber to flow in influent, an inclined plate chamber extending from an upper portion of the swirl flow chamber, an inclined plate mounted within the inclined plate chamber, a treated water discharge part formed at one side of the inclined plate chamber to discharge treated water, and a central shaft for removing bubbles; multi-aeration tanks having at least one front aeration tank(11) and rear aeration tank(12) that are connected to the hydrodynamic separator and include a media layer for adsorbing organic materials, wherein the front aeration tank performs front aeration and includes a fluidized bed media layer between the media layer and the bottom thereof; and a filtration equipment(13) connected to the rear of the aeration tanks to perform posttreatment.

Description

Apparatus and method for purifying polluted rivers and appeals {APPARATUS AND METHOD FOR PURIFYING CONTAMINATED RIVERS AND LAKES}

1 is a schematic configuration diagram of an apparatus for purifying polluted streams and appeals according to an embodiment of the present invention.

2 is a block diagram of a hydrodynamic separator (HDS) having an inclined plate of a polluted stream and an appeal purification apparatus according to an embodiment of the present invention.

Figure 3 is a block diagram of a shear aeration tank of the polluted stream and the lake purifying apparatus according to an embodiment of the present invention.

Figure 4 is a block diagram of the rear end aeration tank of the polluted stream and the appeal purification apparatus according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: hydrodynamic separator with inclined plate

11: front aeration tank 12: rear aeration tank

13: aftertreatment device

20: inlet portion 21: swirl flow chamber

22: inclined plate chamber 23: inclined plate

24: central axis 25: discharge part

26, 46: sludge discharge section

30, 40: media layer 31, 41: fluidized bed media layer

32, 42: blower tube 33: direction of air flow

34: bottom 35: sludge

47: Draft Tube 48: Hopper

The present invention relates to an apparatus and method for purifying polluted rivers and lakes, and more particularly, to pre-treat an inclined plate hydrodynamic separator that can be installed as a substitute for large-scale sedimentation lands while being able to effectively treat inorganic matters in large quantities such as flooding. Apparatus and method for purifying polluted rivers and lakes including a multistage aeration tank including a median layer for treating organic matter and a microstrainer or a filtration sedimentation tank depending on whether the facility is submerged as a post-treatment equipment. .

Pollutants generated in urban areas are largely classified into point sources and nonpoint sources.Non-point sources are pollutants that are polluted by rainwater on the surface during rainfall and are difficult to handle due to the concentration of runoff during rainfall. do. Recently, as various sources of pollutants are gradually expanded to nonpoint sources, treatment methods for them are actively discussed and their purification technologies are also actively studied.

On the other hand, the purification device for removing the non-point source has a high flow rate during rainfall as described above, so that a large amount of running water flows into the facility within a short time, and together with the earth and sand, the processing ability to maintain a stable process even in this case Is required.

However, the conventional method of purification of rivers and lakes has very little preparation for inflow of soil, especially when using waste concrete and waste tires, which have little contact opportunities with microorganisms and contaminants, as pores with microorganisms and suspended solids. It was often the case that this process was closed and the soil was lost and the process itself failed.

As a countermeasure, various methods such as floating or catalytic oxidation have been developed.

In particular, the contact oxidation method is a method of aeration by inserting a microorganism contact material capable of attaching and growing microorganisms in a microbial culture tank, which corresponds to a method that is currently widely used because of the advantages of low sludge generation, simple facilities, and easy maintenance.

However, these methods do not have a big problem in the general flow rate, but the process operation is also difficult when there is a large amount of soil inflow during heavy rainfall such as flooding, and the installation area becomes very large even if the sediment is installed. There is a problem.

In addition, in the case of the catalytic oxidation process, the post-treatment process to minimize the detachment and loss of sludge generated after the biological treatment must be considered, but conventional purification facilities are discharged after the treatment of simple organic matter without any consideration of this process. Only the process is being performed.

Therefore, the development of a new purification device and method that can solve the problem of blockage of the media, the process paralysis problem when a large amount of flow and soil is introduced, such as during heavy rainfall, the desorption and loss of sludge after biological treatment It is required.

The present invention has been made to solve the problems of the prior art described above,

One object of the present invention is to employ a hydrodynamic separator with an inclined plate as a pretreatment equipment, and to include a multi-stage aeration tank and a post-treatment filtration device including a median layer, thereby preventing sludge removal and loss of sludge after biological treatment. It is to provide a device for cleaning polluted rivers and appeals that can solve problems.

Another object of the present invention is to provide a method for purifying polluted streams and appeals using the apparatus for purifying polluted streams and appeals.

One aspect of the present invention for solving the above technical problem is a cylindrical swirl flow chamber for rotating the influent; An inlet formed on one side of the swirl flow chamber and inflowing water; An inclined plate chamber extended with the swirl flow chamber on an upper portion of the swirl flow chamber; An inclined plate mounted inside the inclined plate chamber; A treatment water discharge part formed at one side of the inclined plate chamber and discharged from the treatment water; And a central axis for removing bubbles; Hydrodynamic Separator (HDS: Hydrodynamic Separator) having an inclined plate comprising a; A multistage aeration tank connected to a hydrodynamic separator equipped with the inclined plate; And a filtration device for post-treatment connected to the rear end of the aeration tank.

Another aspect of the present invention comprises the steps of filtering the minerals of contaminated water using the inclined plate hydrodynamic separator; Adsorbing the organics using the median layer and the fluidized bed median layer in a shear aeration tank with an aeration front and an oxygen supply direction in the reverse direction; Discharging the sludge through a hopper having an angle that is deeper than a general angle while filtering again in a rear aeration tank which is a draft tube type; And a final filtration using a microstrainer or a filtration precipitator.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail.

1 is a schematic configuration diagram of an apparatus for purifying polluted rivers and lakes according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus for purifying polluted streams and appeals of the present invention is largely a hydrodynamic separator 10, a front aeration tank 11, a rear aeration tank 12, and a post-treatment filtration device having a slope plate as a pretreatment step. (13).

The contaminated water flows into the hydrodynamic separator 10 having the inclined plate to filter inorganic materials such as earth and sand, and the effluent flows into the shear aeration tank 11 for adsorption and removal of organic matter. The inside of the shear aeration tank 11 includes a media layer and a fluidized media layer to contact and remove organic matter, and the accumulated sludge at the bottom rises by the air supplied from the top and the bottom through the blower pipe. Together with the outflow aeration tank 12. The interior of the rear aeration tank 12 contains a median layer and optionally a fluidized median layer to once again adsorb and remove organics, and the sludge is discharged through a deep hopper. The outflow water from the rear stage aeration tank 12 is introduced into the aftertreatment filtration device 13 composed of a microstrainer or a filtration settling tank, and finally filtered, and the final purified water having a constant water quality is discharged.

Each configuration of the purification apparatus for the polluted stream and the appeal of the present invention will be described in detail as follows.

2 is a block diagram of a hydrodynamic separator (HDS) having an inclined plate of an apparatus for purifying polluted rivers and lakes according to an embodiment of the present invention.

Referring to FIG. 2, the hydraulic dynamic separator (HDS) of the present invention is largely composed of an inlet 20, a swirl flow chamber 21, an inclined plate chamber 22, an inclined plate 23, and an outlet 25. have.

Between the swirl flow chamber 21 and the inclined plate chamber 22, a flow rate buffer part having a diameter gradually increasing toward the upper direction is provided, and the diameter of the inclined plate chamber 22 is the diameter of the swirl flow chamber 21. It is formed larger than its diameter. One side of the swirl flow chamber 21 is formed with an inflow portion 20 through which the inflow water is introduced, and the inflow portion 20 is preferably installed in a tangential direction of the cylindrical swirl flow chamber 21. The inclined plate chamber 22 is provided with a inclined plate 23 and a central axis 24 for accommodating bubbles when swirl flow is generated, and a discharge portion 25 is formed at one side of the inclined plate chamber 22 to discharge the treated water.

Referring to the operation of the hydrodynamic separator (HDS) having an inclined plate of the present invention having the configuration as described above, when the inflow water flows into the swirl flow chamber 21 through the inlet 20, the swirl flow chamber 21 Non-point contaminants are introduced in the tangential direction of the and rotate rapidly along the cylindrical swirl flow chamber (21). At this time, the sludge having a larger particle size and greater specific gravity than non-point contaminants is separated to the outside by the action of centrifugal force and gravity, and then accumulated on the bottom surface and discharged to the outside through the sludge outlet 26. As the inflow water rotates, the inflow water located at the central portion acts upwards by the rotational force and bubbles are generated. These bubbles are accommodated by the central axis 24 provided in the axial direction. Flowing water in the top of the inclined plate chamber 22 is discharged to the aeration tank through the discharge portion (25).

Hydrodynamic separators (HDS) with inclined plates having the same structure and function as described above are mainly composed of point sources and nonpoint sources of polluted streams and lakes even when large flows and soils are introduced temporarily, such as during heavy rainfall. Can effectively handle large minerals. Therefore, the inorganic material is introduced into and accumulated in the aeration tank to reduce the effective volume, so that a shooter part is generated or penetrates into the microbial membrane that adsorbs the organic material, thereby minimizing adverse effects on oxygen transfer. In addition, since a large settling basin is unnecessary as the pretreatment equipment, it is possible to reduce the size of the facility to improve the economics.

On the other hand, the effluent filtered from the hydrodynamic separator (HDS) equipped with the inclined plate is introduced into the multi-stage aeration tank for the treatment of organic matter, in the present invention includes a media (media) layer for shearing the organic material and shear Multistage aeration tank consisting of aeration tank and rear stage aeration tank is used.

The shear aeration tank of the present invention is a front aeration in order to supply a sufficient amount of oxygen even in a high concentration of organic matter inflow or watering, and further includes a fluidized bed media layer between the media layer and the bottom surface therein. In addition, in the aeration method, the oxygen supply direction is reversed from the top to the bottom so that the sludge accumulated in the bottom of the aeration tank is easily disturbed to flow out to the next aeration tank.

3 is a configuration diagram of a shear aeration tank of a purification apparatus for polluting streams and appeals according to an embodiment of the present invention. Referring to FIG. 2, the shear aeration tank of the present invention is largely a media layer 30 and a fluidized bed media layer ( 31), blower tube 32 and flat bottom surface 34.

The media layer 30 is installed above the shear aeration tank, and the median layer 31 is installed below. On the other hand, the blower pipe 32 extends from the top of the shear aeration tank to penetrate the media layer 30 and the fluidized bed media layer 31 to approach the bottom surface 34 of the bottom.

Referring to the operation of the shear aeration tank of the present invention, the effluent from the hydrodynamic separator 10 having the inclined plate is in contact with the media layer 30 to which the microorganisms are attached, and the organic material is adsorbed and removed. In the case of handling the organic load of the general degree, the median filling amount and the aeration amount of the general level can be maintained, and the aeration method can be processed using the conventional draft method.

However, when a high concentration of organic matter is introduced or during the dry season, the amount of oxygen in the shear aeration tank 11 is insufficient, so the air supply amount needs to be further increased. Therefore, in the present invention, the front aeration of the shear aeration tank 11, the aeration amount is greatly improved to increase the amount of oxygen, and the fluidized bed media layer 31 is added between the media layer 30 and the bottom surface 34 of the shear aeration tank. It can be installed to increase the media charge to ensure stable operation of the process.

Also in the aeration system, unlike the general aeration tank, the air supply direction 33 is in the reverse direction from the top to the bottom. As a result, the sludge 35 accumulated in the lower portion of the shear aeration tank is easily accumulated into the next aeration tank without being accumulated in the shear aeration tank due to internal disturbance.

The shear aeration tank of the present invention may be composed of one or more multistage aeration tanks depending on the degree of contamination of the contaminated water.

On the other hand, the outflow water of the front end aeration tank 11 is introduced into the rear end aeration tank 12, the rear end aeration tank 12 of the present invention adopts a draft tube (Draft tube) method, it is easy to accumulate the discharged sludge The angle of the hopper is characterized in that it is slightly deeper than the general angle of about 33.5 °.

4 is a configuration diagram of the rear aeration tank of the purification apparatus for polluting streams and appeals according to an embodiment of the present invention. Referring to FIG. 4, the rear aeration tank of the present invention is largely composed of a media layer 40, a blower pipe 42, It consists of the draft tube 47, the hopper 48, and the sludge discharge part 46.

The media layer 40 is installed above the rear aeration tank, and optionally the fluidized media layer 32 is installed below. On the other hand, the draft tube 47 is installed in the vertical direction between the media layer 40, the blower tube 42 passes through the media layer 40 from the top of the rear end aeration tank, passing through the inside of the draft tube 47 Is installed. A sludge discharge 46 is provided below the fluidized bed media layer 41.

Referring to the operation of the rear end aeration tank, the effluent from the front aeration tank 11 is adsorbed and removed once again while contacting the media layer 40, the water and air through the draft tube 47 to the swirl flow It is induced to achieve, so that even if the microorganisms are detached, it is induced to sink and discharge. The sinking sludge is discharged through the hopper 48 having an angle slightly deeper than the general angle of about 33.5 degrees. In the present invention, the angle of the hopper is preferably in the range of 40 ° to 60 °. Since the sludge has a deeper angle than the general angle, sedimentation of sludge becomes effective, and the density of discharged sludge becomes larger.

The rear stage aeration tank may further include a fluidized bed median layer 41 in addition to the median layer 40 as in the front aeration tank, depending on the degree of contamination of the effluent, thereby allowing more complete adsorption and removal of organic matter. have.

 The effluent filtered through the hydrodynamic separator equipped with the inclined plate, and the organic material is filtered by adsorbing the organic material through the front aeration tank and the rear aeration tank is finally introduced into the filtration device for the post-treatment, The sludge, microorganisms or suspended solids are finally treated.

In the present invention, a microstrainer or a filtration sedimentation tank may be used as the filtration device 13 for post-treatment depending on whether the facility is flooded. Where there is no fear of immersion, install a microstrainer with excellent filtration performance, and if the immersion is concerned, it is possible to install a filtration sedimentation tank because normal operation of the microstrainer is impossible during immersion.

Through the final post-treatment filtration device, it is possible to maintain the water quality of the final effluent by treating desorbed microorganisms or suspended solids that may act as another pollutant.

The present invention can also provide a method for purifying polluted streams and appeals using the apparatus for booting polluted streams and appeals of the present invention.

For example, in the case of purifying polluted streams and appeals according to the present invention, the inorganic matters of the contaminated water are filtered out by using a hydrodynamic separator provided with the inclined plate of the above-described purification apparatus. The effluent is then introduced into the front aeration and shear aeration tanks in the reverse direction of the oxygen supply, contacting the media layer and the fluidized bed layer existing between the media layer and the bottom surface to bring organics into the media of the media layer and fluidized media layer. Adsorb. Thereafter, the effluent of the front aeration tank is selectively introduced into the rear aeration tank, which includes a fluidized-bed media layer, and absorbs the organic material once more and discharges the sludge through a hopper having an angle deeper than the general angle. Then, the outflow water of the rear aeration tank is introduced and purified by final filtration in a microstrainer or a filtration settling tank.

According to the present invention as described above, in the pretreatment device, the inorganic material can be effectively removed even in the inflow of large amounts of rainfall during the rainfall, so large-scale settlement is unnecessary, and it is economical in the case of the shear aeration tank, and by temporarily increasing the media filling amount in the shear aeration tank. As it is possible to supply a high concentration of organic matter or to supply a sufficient amount of oxygen even in the dry season, since the oxygen supply direction is reversed, the sludge may flow out without settling in the aeration tank. In addition, in the case of the rear end aeration tank, the angle of the hopper is made deeper than usual, so that the sludge is easily discharged.

Claims (15)

A cylindrical swirl flow chamber for rotating the influent; An inlet formed on one side of the swirl flow chamber and inflowing water; An inclined plate chamber extended with the swirl flow chamber on an upper portion of the swirl flow chamber; An inclined plate mounted inside the inclined plate chamber; A treatment water discharge part formed at one side of the inclined plate chamber and discharged from the treatment water; And a hydrodynamic separator (HDS) having an inclined plate including a central axis for removing bubbles; A multistage aeration tank connected to the hydrodynamic separator and having one or more front and rear aeration tanks including a media layer for adsorption of organic material, wherein the front aeration tank is front aerated and the media layer and bottom surface A multistage aeration tank comprising a fluidized bed median in between; And A filtering device for post-treatment connected to the rear end of the aeration tank; Purification apparatus of polluted rivers and appeal comprising a. delete delete The method of claim 1, wherein the shear aeration tank Median layer; A fluidized bed media layer located beneath the media layer; A blower tube extending from the top through the media layer and the fluidized bed media layer and extending downwardly; And A flat bottom surface positioned below the blower tube; It includes, wherein the oxygen supply direction of the shear aeration tank is a purification apparatus for polluted rivers and lakes, characterized in that from the top through the blower pipe. The method of claim 1, wherein the rear aeration tank is Median layer; A draft tube installed vertically between the media layers; A blower tube installed to penetrate the media layer from an uppermost portion and pass inside the draft tube; And Hoppers having angles ranging from 40 ° to 60 °; Purification apparatus of polluted rivers and appeal comprising a. The method of claim 4, wherein the rear aeration tank is Median layer; A draft tube installed vertically between the media layers; A blower tube installed to penetrate the media layer from an uppermost portion and pass inside the draft tube; And Hoppers having angles ranging from 40 ° to 60 °; Purification apparatus of polluted rivers and appeal comprising a. 6. The apparatus of claim 5, wherein the rear aeration tank further comprises a fluidized bed median layer between the median layer and the hopper. 7. The apparatus of claim 6, wherein the rear aeration tank further comprises a fluidized bed median layer between the median layer and the hopper. The apparatus of claim 1, wherein the filtration device for post-treatment is a microstrainer or a filtration sedimentation tank. 9. The apparatus of claim 8, wherein the filtration device for post-treatment is a microstrainer or a filtration sedimentation tank. Filtering out the minerals of contaminated water using a hydrodynamic separator equipped with an inclined plate; Adsorbing the organics by contacting the media layer and the fluidized bed media layer existing between the media layer and the bottom surface by introducing the effluent into a shear aeration tank having a front aeration and an oxygen supply direction from top to bottom; Selectively flowing the effluent of the front aeration tank into the rear aeration tank, which is a fluidized median layer and is a draft tube type, adsorbs organic material once more and discharges the sludge through a hopper having a deeper angle than the general angle; And Introducing the effluent of the rear aeration tank and finally filtering it in a microstrainer or a filtration sedimentation tank; Method of purifying polluted rivers and appeal comprising. 12. The method of claim 11, wherein the hopper of the rear end aeration tank has an angle in the range of 40 to 60 degrees. Median layer; A fluidized bed media layer located beneath the media layer; A blower tube extending from the top through the media layer and the fluidized bed media layer and extending downwardly; And A flat bottom surface positioned below the blower tube; And an aeration tank of polluted rivers and lakes, characterized in that the oxygen supply direction is from top to bottom through a blower pipe. Median layer; A fluidized bed media layer located beneath the media layer; A blower tube extending from the top through the media layer and the fluidized bed media layer and extending downwardly; And A shear aeration tank including a flat bottom surface positioned at the bottom of the blower pipe, the oxygen supply direction of which is directed from top to bottom through the blower pipe; And Median layer; A draft tube installed vertically between the media layers; A blower tube installed to penetrate the media layer from an uppermost portion and pass inside the draft tube; And A multistage aeration tank of contaminated rivers and lakes comprising a trailing aeration tank comprising a hopper having an angle in the range of 40 ° to 60 °. 15. The multistage aeration tank of claim 14, wherein the rear aeration tank further comprises a fluidized bed median layer between the median layer and the hopper.

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