KR101392719B1 - Apparatus for setting porous filtering media and aeration tank - Google Patents

Abstract

Disclosed is an improved contact filter medium setting device and contact aeration tank that prevents a large amount of sludge from adhering to a contact medium to reduce the odor due to anaerobicization and the treatment efficiency.
The contact aeration tank according to the present invention is a contact aeration tank provided with a contact filter material mounting device for fixing a contact material, a tear pipe disposed below the contact material filter device, and an air diffuser pipe provided on the tear pipe, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a contact filter medium and an aeration tank,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact aeration tank for a wastewater treatment system, and more particularly, to an improved contact filter medium installation apparatus and contact aeration tank for preventing contact of a large amount of sludge to a contact material,

Generally, systems for treating wastewater such as sewage, domestic water, industrial wastewater, and livestock wastewater are roughly divided into physical treatment systems, chemical treatment systems, and biological treatment systems. The physical treatment system mainly utilizes the physical action, and is processed by using a screen, a gypsum and the like. The chemical treatment system mainly uses chemical reaction. The chemical treatment system uses neutralization tank, oxidation / reduction reaction tank, flocculation tank, .

The biological treatment system is a method for treating sewage and waste water using microorganisms, and uses reaction facilities such as activated sludge tank and activated sludge tank.

Biological treatment methods include activated sludge and contact oxidation. The contact oxidation method has recently attracted attention because it has a simple sludge generation and a simple facility because it is provided with a porous filtering media (also referred to as a carrier) capable of adhering / growing microorganisms in a contact aeration tank. The catalytic oxidation process can again be divided into using a floating contact material that flows and floats in the contact aeration tank and the use of a fixed contact material that is fixed with a predetermined arrangement.

Fig. 1 shows the construction of a contact aeration tank 100 using a conventional fixed contact agent. The contact aeration tank 100 removes organic matter in the influent water (sewage, ozone, and wastewater) through oxidation / decomposition using microorganisms attached to the surface of the contact material 14, and performs nitrification or the like of ammonia nitrogen. The contact material 14 is fixed by the contact material mounting device 12. An air diffuser 16 and an oxygen supply pipe 18 are provided in the lower portion of the contact-type filter mounting unit 12 to supply oxygen to facilitate oxidation / decomposition of organic matter and nitrification of ammonia nitrogen. The contact agent attaching device 12 is fixed to the wall and the bottom of the contact aeration tank 100 by the support table 20.

The air diffuser 16 is installed at the bottom of the contact aeration tank 100 and supplies fine bubbles to the wastewater stored in the contact aeration tank 100. The air diffuser 16 has a rectangular metal plate 16a and a rubber membrane 16b having a large number of air holes provided on the metal plate 16a so as to evenly supply fine bubbles to the entire bottom of the contact aeration tank 100. [ ). When air flows into the space between the metal plate 16a and the membrane 16b through the lower portion of the membrane 16b, the expanded membrane 16b shrinks when the membrane 16b expands and the inflow of air stops. Due to the inflow / outflow of the air, the membrane 16b expands / contracts, and fine bubbles having a diameter of about 1 mm to 3 mm are generated through the air holes formed on the membrane 16b by the expansion / contraction operation.

Meanwhile, an agitator (not shown) is installed in the contact aeration tank 100 to flow inflow water in a predetermined direction as shown by arrows so that the microorganisms and the substrate can be smoothly mixed.

Fig. 2 shows a detailed configuration of the contact filter medium setting device shown in Fig. 2 includes upper and lower frames 22a and 22b horizontally installed at upper and lower portions of mutually facing inner walls of the contact aeration tank 100, upper and lower frames 22a and 22b facing each other, The upper and lower supports 24a and 24b and the upper and lower supports 24a and 24b which are supported by the lower frames 22b facing each other and between the upper and lower supports 24a and 24b, And includes a filter material connection ring 26.

As shown in Fig. 2, the contact material 14 is connected in a staggered manner using the contact material connecting ring 26. [

The upper and lower supports 24a and 24b form one pair of arms and these pairs of arms are successively arranged at predetermined intervals along the upper and lower frames 22a and 22b.

In the contact aeration tank 100, a water stream in a certain direction is formed by aeration and stirring.

The contact material mounting apparatus 12 prevents the contact medium 14 from being separated from the contact medium contact link 26 with respect to the water flow generated in the contact aeration tank 100 and also maintains the state of being arranged at regular intervals .

It is preferable that no sludge is adhered to the contact medium 14 provided by the contact medium filter installation device 12 for smooth microbial activity.

However, as time passes, the sludge adheres to the contact media 14 and becomes larger and larger. If such sludge is not removed smoothly, the contact material 14 will not function in the end.

On the other hand, in the contact image filter medium attaching device 12 as shown in Fig. 2, a phenomenon occurs in which the straps 24a and 24b are bent in the flow direction by the water flow generated in the contact aeration tank 100. [ Such a bending phenomenon causes stacking phenomena in which a plurality of adjacent contact media 14 are stacked at narrow intervals. If such a lamination phenomenon occurs, there is a problem that the sludge attached to the contact material 14 is not desorbed and the water treatment ability of the contact aeration tank 10 is lowered.

In addition, if the sludge attached to the contact material 14 is not smoothly removed, there is a problem that the anaerobic smell is generated.

Disclosure of Invention Technical Problem [10] The present invention has been made to solve the above problems, and it is an object of the present invention to provide a contact type filter material having a tearing means for preventing sludge from adhering to fixed contact type filter media installed in a contact aeration tank, And an object thereof is to provide a device.

It is still another object of the present invention to provide a contact aeration tank having sludge attached to a stationary contact medium installed in a contact aeration tank to remove a malodor due to anaerobicization and prevent deterioration of water treatment efficiency.

In order to achieve the above-mentioned object,

A contact filter medium mounting apparatus for fixing a contact medium, comprising: a plurality of mounts for supporting the contact medium at upper and lower sides, a horizontal frame for supporting the mounts, and a hollow tube shape having a plurality of through- A plurality of contact material connection rings arranged at predetermined intervals on the base to support the contact material, and an air supply pipe for supplying air to the vertical frame.

According to another aspect of the present invention, there is provided a contact aeration tank, comprising: a contact filter medium installation device for fixing a contact medium; and a contact aeration device installed adjacent to the contact medium media installation device, A drain pipe for applying the drain pipe; And an air supply pipe for supplying air to the desorption line.

Here, it is preferable that the desorption pipe is installed in the lower portion of the contact filter medium setting device.

It is preferable that the diffuser is a disk-shaped diffuser having a first opening of a first diameter opened to the vertical frame side and a second opening which opens to the contact media and has a larger diameter than that of the first opening.

The apparatus for attaching contact media according to the present invention is characterized in that a plurality of through holes are formed in a vertical frame for supporting a base for fixing a contact material and blowing air through the holes to generate a water flow having a predetermined pressure, It has the effect of preventing the sludge from adhering to the contact material by applying it to the filter material.

The contact aeration tank according to the present invention is provided with a desorption line adjacent to the contact filter medium setting device and the water flow generated through the desorption line is applied to the contact filter material fixed to the contact filter medium setting device to prevent the sludge from adhering to the contact material Effect.

This prevents the sludge from adhering to the contact material provided in the contact aeration tank and causing the odor to be generated and the water treatment efficiency to be lowered.

1 shows the construction of a contact aeration tank using a conventional fixed contact agent,
Fig. 2 shows a detailed configuration of the contact filter medium setting device shown in Fig. 1,
3 shows a detailed configuration of a contact filter medium setting device according to the present invention,
Fig. 4 shows the frame structure of the contact filter medium holding apparatus shown in Fig. 3,
5 shows the construction of the contact aeration tank according to the present invention,
6 is a graph showing the microbial concentration and floating microbial concentration of the contact filter medium by the method of the present invention,
FIG. 7 is a graph showing characteristics of influent and discharged water according to the method of the present invention,
FIG. 8 is a graph showing the microbial concentration and floating microbial concentration of the contact filter medium by the conventional method, and
FIG. 9 shows a graph showing the characteristics of inflow water and discharged water according to the method of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 3 shows the structure of a contact filter medium setting device according to the present invention.

Referring to Fig. 3, a contact filter medium setting apparatus 102 installed in a contact aeration tank is shown. The contact filter media 104 are fixed by the contact filter media attaching device 102.

The contact material mounting device 102 has upper and lower mounts 204a and 204b and a grid-like frame for supporting them. The frame 202 has a horizontal frame 202a, a vertical frame 202b and a support frame 202c for supporting the stands 204a and 204b. The base 204 is stably supported by the grid-shaped frame 202.

The vertical frame 202b has the form of a hollow tube having a plurality of through holes 216. [

The upper and lower frames 202a and 202b horizontally installed at the upper and lower portions of the mutually opposing inner walls of the contact aeration tank, the upper and lower frames 202a and 202a opposed to each other, and the lower frames 202b opposite to each other And a contact ring connecting ring 206 provided at predetermined intervals on the upper and lower supports 204a and 204b and the upper and lower supports 204a and 204b, respectively.

As shown in FIG. 3, the contact media 104 are connected in a staggered fashion through contact media connection rings 206 provided on the upper and lower supports 204a, 204b.

The upper and lower supports 204a and 204b form a pair of fascia pairs, and these fascia pairs are successively arranged at predetermined intervals along the upper and lower horizontal frames 202a. The frame pairs are stably supported by the frame 202. Accordingly, the phenomenon of bowing of the base by the water flow generated by the stirrer to flow the organic matter and the subsequent lamination phenomenon is prevented.

Fig. 4 shows the frame structure of the contact filter medium holding device shown in Fig. In Fig. 4, the x direction indicates the horizontal direction and the y direction indicates the vertical direction.

The upper frame 204a and the lower frame 204b are staggered on the upper frame 202a and the lower frame 202b and the staggered contact media 104 between the upper frame 204a and the lower frame 204b Respectively.

An air supply pipe 210 for supplying air is connected to the vertical frame 202b.

The air supplied by the air supply pipe 210 is ejected through the through holes provided on the surface of the vertical frame 202b to generate a water flow of a predetermined pressure. This water stream is applied to the contact media 104, and the sludge attached to the contact media 104 is removed by the pressure of the water stream. Alternatively, it is possible to generate bubbles of relatively large diameter through the through holes provided on the surface of the vertical frame 202b, thereby removing the sludge. The size of the bubbles generated at this time is preferably larger than the minute bubbles generated in the conventional air diffuser 16 as shown in Fig. 1 and sufficiently large enough to desorb the sludge adhering to the contact media 104. [

In the embodiment of the present invention, the vertical frame 202b is provided with a through hole for desorbing the sludge, but is not limited thereto. For example, in addition to the vertical frame, a through hole may be provided in the horizontal frame or the support frame.

On the other hand, in the embodiment of the present invention, the through holes are formed in the left and right direction of the vertical frame in FIG. 3, but the present invention is not limited thereto. For example, through holes may be formed in the front,

Fig. 5 shows the construction of the contact aeration tank according to the present invention.

Referring to Fig. 5, the contact filter medium setting device 12 is installed in the contact aeration tank 300. Fig. The contact material 14 is fixed by the contact material mounting device 12.

The air diffuser 16 is installed at the bottom of the contact aeration tank 300 and supplies fine bubbles to the wastewater stored in the contact aeration tank 300. The air diffuser 16 has a rectangular metal plate 16a and a rubber membrane 16b having a large number of air holes provided on the metal plate 16a so as to evenly supply fine bubbles to the entire bottom of the contact aeration tank 100. [ ).

The take-off pipe 302 is provided adjacent to the contact material 104, preferably below the contact material attaching device 12. [ That is, the disc-shaped air diffusing pipe 302 is provided with a disk-shaped diffusing pipe 304 at a predetermined interval.

In addition, a disk-shaped air diffusing pipe 304 is provided in the desorbing pipe 302 at a predetermined interval. Here, the contact filter medium attaching device 102 is fixed to the inner wall and the bottom of the contact aeration tank 300 by the support table 20.

It is preferable that the diffuser 304 is a disk-shaped diffuser having a first opening of a first diameter opened to the side of the desorption pipe 302 and a second opening which opens to the contact medium 14 side and has a wider diameter than the first opening .

The microbes and the substrate are smoothly mixed by the air introduced through the air diffusing pipe 106 disposed at the lower portion of the contact medium member 14 so that oxidation / decomposition of organic matter and nitrification of ammonia nitrogen are smoothly performed .

Meanwhile, an agitator (not shown) for flowing inflow water in a predetermined direction as shown by an arrow is installed in the contact aeration tank 300 to smoothly mix the microorganism and the substrate.

A water flow having a predetermined pressure is generated by the air taken out through the air diffuser 304 and the sludge adhered to the contact medium 14 adjacent to the air diffuser 304 is removed by the water flow. That is, the attachment of the sludge to the contact media 14 due to the water flow generated by the air taken out through the air diffuser 304 is disturbed or the attached sludge is removed, so that the deterioration of the odor and water treatment efficiency due to anaerobicization Is prevented.

Alternatively, it is also possible to generate bubbles of relatively large diameter through the air diffuser 304 to remove the sludge adhering to the contact medium 14. The size of the bubbles generated at this time is preferably large enough to desorb the sludge adhering to the contact media 14.

The air supplied to the air supply pipe 310 should have a higher air pressure than that supplied to the oxygen supply pipe 18 so that a separate air supply for the air supply pipe 310 is preferably disposed.

In order to evaluate the performance of the contact aeration tank according to the present invention, a typical activated sludge construction method using actual influent water of a wastewater treatment facility at T is applied to a model facility having a daily treatment capacity of 1 m < 3 > In the conventional method and the method of the present invention as shown in Figs. 3 to 5, that is, a method in which a through hole is formed in the frame of the contact filter medium attaching device and a method in which a tear pipe is installed in the lower portion of the contact filter medium attaching device , Respectively, and 50% of the volume of the contact aeration tank.

      The evaluation items are the concentration of immobilized microorganisms attached to the contact media installed by each method, the concentration of microorganisms suspended in the contact aeration tank (MLSS), the biochemical oxygen demand (BOD) of influent flowing into the contact aeration tank, (SS), total nitrogen (TN) and total phosphorus (TP) for 6 months.

      The biomass concentration and the suspended microorganism (MLSS) concentration attached to the contact media by the method of the present invention over the entire six times are shown in Tables 1 and 6, respectively.

The microbial concentration and the suspended microbial concentration of the contact filter medium by the method of the present invention Item
month Biomass
(mg / L) MLSS
(mb / L) One 12.500 3.315 2 12.393 3.287 3 12.371 3.217 4 12.395 3.294 5 12.434 3.308 6 12.692 3.377 Average 12.464 3.300 at least 12.371 3.217 maximum 12.692 3.377

As a result of analyzing the microbial concentration, it was 12,371 ㎎ / ℓ at the maximum and 12,464 ㎎ / ℓ at the maximum with a maximum of 12,692 ㎎ / ℓ, Indicating that the original function of the contact media is faithfully maintained even after attachment of microorganisms to the filter media.

Tables 2 and 7 below show the effluent water, effluent water, and treatment efficiency of the actual wastewater after the contact media was installed according to the method of the present invention in a typical activated sludge process. The average biochemical oxygen demand (BOD) was 7.5 mg / (97.4%), and the suspended solids (SS) showed a high treatment efficiency of 95.9%. In addition, the treatment efficiency of nitrogen and phosphorus in the typical activated sludge process is 20 ~ 30%, whereas that of total nitrogen (TN) and total phosphorus (TP) is 52.7% and 48.4% , It can be interpreted as a result of faithful performance of microorganisms attached to contact media by stable installation of contact media.

The influent and discharged water characteristics according to the method of the present invention Item Influent Effluent Treatment efficiency BOD 286.5 7.5 97.4 SS 211.9 8.7 95.9 T-N 45.7 21.6 52.7 T-P 3.1 1.6 48.4

As a comparative example, the results of the conventional operation are shown in Tables 3 and 4 and 8 and 9, respectively.

As shown in Table 3 and FIG. 8, when the conventional method was applied, the concentration of microorganisms attached to the contact media was 9,537 mg / L and the maximum was 15,211 mg / L, which was 11,756 mg / L. , Which is caused by lamination between contact media and decay due to corruption during the operation of the contact aeration tank.

Microbial concentration and floating microbial concentration on contact media by conventional method Item
month Biomass
(mg / L) MLSS
(mb / L) One 10,235 2,988 2 10,147 3,323 3 15,121 4,061 4 14,615 3,656 5 9,537 3,008 6 10,881 3,111 Average 11,756 3,358 at least 9,537 2,988 maximum 15,121 4,061

Table 4 and Figure 9 show the effluent, effluent and treatment efficiency of the actual wastewater after the contact media was installed in a conventional activated sludge process according to the conventional method. The average biochemical oxygen demand (BOD) was 27.5 mg / l The effluent showed a treatment efficiency of 90.4%, and the suspended solids (SS) showed a treatment efficiency of 85.9%. The treatment efficiencies of total nitrogen (TN) and total phosphorus (TP) were 24.3% and 22.6%, respectively, which can be removed by the operation of a typical activated sludge process. It is thought that it is not able to exert its function.

Influent and effluent characteristics by the conventional method Item Influent Effluent Treatment efficiency BOD 286,5 27,5 90,4 SS 211,9 29,8 89,9 T-N 45,7 34,6 24,3 T-P 3.1 2,4 22,6

As described above, according to the present invention, it is possible to prevent odor generation due to anaerobicization of the contact media by the stable contact material installation method and the removal of the contact material due to the smooth air supply and desorption, It is possible to optimize not only the efficiency of the wastewater treatment but also the efficiency of the contact wastewater treatment.

Claims (7)

delete A contact filter medium setting device for fixing a contact filter medium,
A plurality of pairs of fingers each having a pair of fingers installed at upper and lower sides to support the contact material at upper and lower sides and arranged at predetermined intervals;
A frame of a lattice structure having a plurality of horizontal frames for supporting the pair of fusebole pairs and a plurality of vertical frames for supporting the plurality of horizontal frames, the frame having a hollow tube shape having a plurality of through holes formed therein;
A plurality of contact filter connecting rings arranged at predetermined intervals on the base to support the contact filter media; And
An air supply pipe for supplying air to the vertical frame; / RTI >
Characterized in that air is blown through the through holes provided on the surface of the vertical frame to remove the sludge adhering to the contact medium
delete delete delete Contact filter media mounting device for fixing contact media;
A tear pipe disposed adjacent to a lower portion of the contact filter medium setting device and adapted to apply a predetermined flow of water to the contact material fixed to the contact material filter attachment device;
An air supply pipe for supplying air to the desorption line; And
And a plurality of acid engines installed in the desorption pipe at predetermined intervals,
Here, the diffusing pipe is a disk-shaped diffusing pipe having a first opening of a first diameter opened to the side of the desorbing pipe, and a second opening which is opened to the contact material and has a larger diameter than the first opening,
The contact filter medium setting device
A plurality of pairs of fingers each having a pair of fingers installed up and down inside the contact aeration tank and arranged at predetermined intervals in the width direction of the contact aeration tank;
A grid-like frame having a plurality of horizontal frames and vertical frames for supporting the pair of fusers in horizontal and vertical directions; And
And a plurality of contact medium connection rings arranged at predetermined intervals on the mount.
7. The apparatus of claim 6, wherein the vertical frame is formed of a hollow tube having a plurality of through-
The air supplied by the air supply pipe is jetted through a through hole provided on the surface of the vertical frame to obtain a water flow of a predetermined pressure and the water stream is applied to the contact medium to thereby desorb the sludge adhering to the contact medium. Contact aeration tank.

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