KR0164268B1 - Biofilm waste water treating equipment - Google Patents

Abstract

The present invention relates to a new biofilm wastewater treatment apparatus having an excellent wastewater treatment efficiency, a high median filling rate per unit volume, a high spatial rate, and excellent sludge desorbing properties.

According to the present invention, there are provided a cylindrical casing (1) having a waste water inlet (4) and an overflow pipe (6) formed in an upper portion thereof and a drain (5) A mesh cylinder 9 having an annular ring shape and having a cylindrical inner wall 17 and an outer wall 18 coaxial with the main body 1 and filled with a biomedia 15 therein, A backwashing pipe 13 penetrating and arranged in a ring shape along the mesh cylinder 9 at a lower portion of the ring-shaped mesh cylinder 9; an air supply pipe 12 provided adjacent to the backwashing pipe 13; The biofilm waste water treatment apparatus comprising: Inside the inner wall 17 of the mesh cylinder 9, there is provided a conical air brake 14 protruding downward.

Description

Biofilm Waste Water Treatment System

FIG. 1 is a cross-sectional view of an embodiment of the present invention. FIG.

FIG. 2 is a planar view of the embodiment; FIG.

FIGS. 3 and 4 are schematic views of a backwash pipe and an air supply pipe of the embodiment. FIG.

FIGS. 5 and 6 are diagrams showing the structure of the mesh cylinder and the air brake of the embodiment. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1: Cylindrical casing 2: Leg

2: Cover 4: Inlet

5: drain 6: overflow pipe

7: manhole 8:

9: mesh cylinder 10: frame

11: mesh bag 12: air supply pipe

13: backwash pipe 14: air brake

The present invention relates to a biofilm wastewater treatment apparatus, and more particularly, to a biofilm wastewater treatment apparatus having a new structure that is excellent in wastewater treatment efficiency, has a high median filling rate per unit volume, a high space factor, and is excellent in sludge desorbing property.

Various physico-chemical or biological wastewater treatment methods have been used to treat domestic sewage, factory wastewater or livestock wastewater due to concentration of population and industrial advancement. Among these wastewater treatment methods, the physico-chemical treatment method poses a risk of causing secondary pollution, and the biological treatment method can not be quickly adapted to the fluctuation of the inflow water or the treatment condition, so that the wastewater is discharged in an untreated state There is a problem that a large area is required.

On the other hand, there has been proposed a method for treating wastewater by a natural purification method by forming an environment suitable for artificially forming microorganisms on artificially formed porous microorganism carriers, that is, biomedical surfaces by artificially attaching microorganisms to the surfaces thereof . This biofilm treatment method is characterized in that the growth conditions of microorganisms such as dissolved oxygen and temperature are artificially controlled so that the selected microorganisms are proliferated and activated, thereby improving the efficiency of wastewater treatment and the removal rate of organic matter.

However, the conventional biofilm treatment method using bio-media has limitations in increasing the filling rate and space ratio of the medium in order to maximize the treatment efficiency in a limited site and a narrow reaction tank volume, and it is difficult to remove the excess sludge adhered to the medium It is difficult to effectively remove the sludge by partially removing the sludge even during backwashing because the mediator is generally filled in the reaction tank. In addition, the injection pressure applied during backwashing was dispersed in parts other than the media, and excessive power was consumed for backwashing.

The present invention has been proposed in view of the problems of conventional biofilm wastewater treatment as described above. It maximizes the volume ratio and space ratio of the biomedia, that is, the specific surface area, even in a narrow site area, The present invention aims to provide a biofilm wastewater treatment apparatus with a new structure capable of backwashing with less power by concentrating the water pressure in the medium.

According to the present invention, there are provided a cylindrical casing (1) having a waste water inlet (4) and an overflow pipe (6) formed in an upper portion thereof and a drain (5) A mesh cylinder 9 having a circular circular ring-shaped cross section in which a cylindrical inner wall 17 and an outer wall 18 coaxial with the inner wall 1 and filled with the biomedia 15 are provided, A backwash pipe 13 penetrating through the mesh cylinder 9 and arranged in a ring shape along the mesh cylinder 9 at a lower portion of the ring shaped mesh cylinder 9 and an air supply pipe 12 provided adjacent to the backwash pipe 13, The biofilm wastewater treatment device is characterized by comprising:

According to another aspect of the present invention, there is provided an apparatus for treating biofilm wastewater, characterized in that a conical air brake (14) protruding downward is provided inside the inner wall (17) of the mesh cylinder (9).

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of a wastewater treatment apparatus according to an embodiment of the present invention, FIG. 2 is a plan view, and FIGS. 3 and 4 show a backwash pipe 13, an air supply pipe 12, And shows the construction of the cylinder (9).

As shown in the drawings, according to the present invention, a cylindrical casing 1 is supported by a support leg 2, and the upper end thereof is covered with a cover 3. A waste water inlet (4) is formed at one side of the upper portion of the casing (1), and an overflow pipe (6) is formed at the other side of the upper side. A drain 5 is formed at the center of the conical bottom surface portion protruding downward, and a manhole 7 is formed at one side surface of the bottom surface portion. A transparent window 8 and a level gauge 26 are formed on a predetermined portion of the side wall of the casing 1 and a level switch 29, an air vent 27, a dissolved oxygen sensor 28, A sensor 30 and the like are formed. The cover (3) is configured to be hingedly opened and closed by a hinge (31).

Inside the casing 1, there is provided a mesh cylinder 9 having a circular ring section in cross section and including a cylindrical inner wall 17 and an outer wall 18. [ As shown in FIG. 5, the mesh cylinder 9 is disposed coaxially with the casing 1, and is divided into a plurality of mesh-like segments made of a wire mesh so as to be detachably assembled to the frame 10, (11). In this mesh cylinder 9 or the mesh bag 11, the biomedia 15, that is, the microorganism carrier, in which microorganisms adhere to form a biofilm, is filled. As the biomedia 15, a porous formed article made of ceramic, glass, synthetic resin or other materials is preferably used, which has a large specific gravity and a large specific surface area and a water absorption rate of 100% or more.

The wastewater flowing into the upper portion of the casing 1 through the inlet 4 passes through the biomedia 15 from the outer wall 18 of the mesh cylinder 9 and the organic matter contained in the wastewater, Is decomposed by the microorganisms or adsorbed on the medium, and the for-treatment water flows out to the drain 5 below the inner wall 17. Thus, by disposing the biomedicine 15 in a hollow cylindrical shape, a high volume flow path can maintain a specific surface area or a space ratio in a narrow space, and therefore a highly efficient wastewater treatment can be performed with a compact device. In addition, the mesh cylinder 9 is dividedly fabricated into a plurality of mesh bags 11, whereby the partial replacement and maintenance of the biomedia 15 can be simplified.

A backwash pipe 13 as shown in FIG. 3 is disposed under the mesh cylinder 9 in the casing 1. As shown in FIG. The backwash pipe 13 is arranged in a ring shape corresponding to the position of the mesh cylinder 9 or the biomedia 15 and has a plurality of injection holes 32 formed on its upper surface. When the thickness of the sludge accumulated in the biomedicine 15 is excessively increased to decrease the oxygen supply or cause no aerobic reaction, the backwash pipe 13 injects high-pressure air, To remove the medium from the medium (15).

On the other hand, in order to lead the compressed air toward the biomedia 15 filled in the mesh cylinder 9 so that the compressed air injected from the backwash pipe 13 is dispersed and not wasted, A conical air brake 14 is provided so as to protrude downward. An annular inclined surface 33 is also formed on the upper portion of the air brake 14. According to this configuration, the compressed air from the backwash pipe 13 disposed directly below the biomedic 15 is directly sprayed to the biomedic 15 along with the water, so that the compressed air can be adhered to the biomedic 15 The compressed air injected into the inner wall 17 of the mesh cylinder 9 is not released as it is and is blocked and guided by the air brake 14 so that the sludge tared of the biomedical 15 Lt; / RTI > Therefore, the backwashing efficiency becomes very high.

The air brake 14 is housed in the air brake installation ring 21 formed on the inner wall 17 of the mesh cylinder 9. However, in consideration of the components of the inflow wastewater and the growth state of the sludge, The installation height of the air brake 14 can be adjusted to enable backwashing. To this end, a plurality of air brake installation rings 21 are mounted along the inner wall 17 of the mesh cylinder 9 and a cutout 35 is formed in the installation ring 21 as shown in FIG. 6 The engaging pieces 36 of the air brakes 14 are allowed to pass through the cutouts 35 and the air brakes 14 are rotated slightly on the optional mounting rings 21, 21).

In the lower portion adjacent to the backwash pipe 13, an air supply pipe 12 having a branched shape as shown in FIG. 4 is disposed. A large number of through holes 34 are formed on the upper surface of the air supply pipe 12 to supply an air roll to supply a sufficient amount of dissolved oxygen to the inside of the casing 1.

In the drawing, reference numeral 19 denotes a ladder, 20 denotes a hand grip, and 16 denotes an inclined stopper plate provided on the inner peripheral surface of the lower end of the casing 1. The wastewater flowing into the casing 1 is discharged directly through the biomedia 15 .

According to the present invention described above, the mesh cylinder 9 for filling the biomedia 15 is formed into a circular ring or hollow cylinder in cross section so that the wastewater flows from the outer wall 18 through the biomedia 15 to the inner wall 17 , It is possible to maximize the specific surface area or space ratio of the via media 15 while achieving a high median volume ratio in a narrow space. Therefore, a biofilm waste water treatment apparatus which is compact and efficient even in a narrow site area can be achieved. The backwashing pipe 13 is disposed immediately below the biomedic 15 and the hollow portion of the inner wall 17 of the mesh cylinder 9 is blocked by a conical air brake 4, It is possible to increase the backwashing efficiency by guiding the water pressure to the biomedic 15 side.

Claims (2)

A cylindrical casing 1 formed with a waste water inlet 4 and an overflow pipe 6 at an upper portion thereof and a drain 5 formed at a bottom surface thereof and a cylindrical casing 1 provided inside the casing 1, A mesh cylinder 9 having a cylindrical inner ring 17 and an outer wall 18 and filled with a biomedia 15 therein and a ring-shaped mesh cylinder 9 penetrating into the inside of the casing 1, A backwash pipe 13 disposed in a ring shape along the mesh cylinder 9 at a lower portion of the mesh cylinder 9 of the backwash pipe 13 and an air supply pipe 12 provided adjacent to the backwash pipe 13 The biofilm waste water treatment device. The biofilm wastewater treatment device according to claim 1, characterized in that a conical air brake (14) protruding downward is provided inside the inner wall (17) of the mesh cylinder (9).