KR200189492Y1 - The inclined precipitation tank in waste water disposal plant by microorganism contact - Google Patents

Abstract

The present invention is a small sewage treatment device (Package type system) that prevents the decrease in efficiency due to the killing of microorganisms while installing a chemical treatment tank. The slant plate sedimentation tank of the sewage treatment apparatus by microbial contact to improve the treatment efficiency of the sludge, which is described below, will be described.

In a sewage treatment apparatus equipped with an inclined plate settling tank between a chemical treatment tank and a biofilm filtering device, the inclined plate settling tank includes a chemical treatment water feed pipe, a sludge discharge pipe, a sludge conveying pipe, a washing air supply pipe, and a transfer pipe connected to the biofilm filter device. An inlet guide which is fixed to the inside of the housing, the one side plate to guide the flow of the chemical treatment water, an outlet guide that is fixed to the inside of the other side plate to guide the supernatant to the transfer pipe, and the inlet guide and the discharge guide It is characterized in that it comprises a filter portion consisting of a plurality of filter inclined plate mounted between, and a conveying pump is mounted to the lower portion of the housing and the end of the sludge conveying pipe is connected.

Description

The inclined precipitation tank in waste water disposal plant by microorganism contact}

The present invention relates to an inclined plate sedimentation tank of a sewage treatment apparatus, and more specifically, in a sewage treatment apparatus (package type system) which is equipped with a chemical treatment tank and prevents a decrease in efficiency due to the killing of microorganisms, a chemical treatment tank and a biofilm The present invention relates to an inclined plate sedimentation tank of a sewage treatment apparatus by microbial contact, which is equipped with an inclined plate sedimentation tank between filtration devices to increase the treatment efficiency of sludge contained in chemically treated water.

In recent years, the national standard of living has been improved by rapid economic development and industrialization. However, the amount of domestic sewage has increased rapidly, and the water pollution of rivers is becoming more and more serious. The situation is causing.

In order to prevent this, the installation of a sewage treatment plant and various sewage treatment methods for the treatment of domestic sewage and sewage (hereinafter, referred to as 'sewage') has been presented, and an example of the sewage treatment method is illustrated in FIG. 3.

As shown in FIG. 3, the sewage is transferred to the flow control tank 210 through the sewage transport pipe 211 and again to the discharge tank 240 through the anaerobic tank 220 and the aerobic tank 230 through the inflow water transport pipe 212. The sludge contained in the transport liquid of the discharge tank 240 is discharged and the purified supernatant is discharged through the discharge pipe 241, and a part of the sludge precipitated in the discharge tank 240 is the sludge conveying pipe 242. Returned to the influent feed pipe (212) through the inflow into the anaerobic tank 220, part is transferred to the anaerobic dephosphor tank 250, sludge is precipitated, the sludge is precipitated in the anaerobic dephosphor tank 250 and the remaining supernatant Is transported to the chemical treatment tank 260 and chemically processed and then transferred to the influent feed pipe 212 through the chemical treatment water transport pipe 261 and transported to the anoxic tank 220 together with the sludge transported through the transport sludge transport pipe 242. And sludge precipitated in the anaerobic dehydration tank (250) Is to be transferred to the aerobic tank 230 through seulreojiyi songgwan 251.

The sewage is sent to the flow rate adjustment tank 210 through the sewage transport pipe 211 and again through the anoxic water tank 220 and the aerobic tank 230 through the inlet water transport pipe 212 and the sewage is sent to the discharge tank 240. .

The transport liquid transferred to the discharge tank 240 precipitates the sludge contained therein, and the purified supernatant is discharged to the stream or the next process through the discharge pipe 241, and a part of the sludge precipitated in the discharge tank 240. The sludge conveying pipe 242 is mixed with the incoming sewage to be returned to the inlet water transfer pipe 212, which is the front part of the anaerobic tank 220 step is introduced back into the anaerobic tank 220, and part of the anaerobic dephosphorization tank (250) Transferred.

The transport liquid transferred to the anaerobic dewatering tank 250 precipitates the sludge. At this time, the precipitated sludge gives a sufficient residence time to decompose the bacteria in the sludge to a complete anaerobic state, and then through the sludge conveying pipe 251. It is transported to 230 and is transferred back to the anaerobic tank 220 through the inner conveying pipe 231 together with the mixed liquid transferred from the anaerobic tank 220.

In particular, by conveying the mixed sludge of the aerobic tank 230 back to the anoxic tank 220 not only to increase the overall nitrogen removal rate by using the organic matter of the influent sewage, but also to the nitrogen discharge as an adverse effect on the phosphorus discharge in the anaerobic dephosphorization tank (250) This reduces the oxide load.

Sludge was precipitated in the anaerobic dephosphorization tank 250 and the remaining supernatant is transferred to the chemical treatment tank 260 and chemically treated, and the treated water is again subjected to the anoxic tank 220 through the chemical treatment water transfer pipe 261. Phosphorus influent transport pipe 212 is transferred to the oxygen-free tank 220 with the sludge conveyed through the conveying sludge transport pipe 242.

After removing or separating phosphorus in the anaerobic dephosphorization tank 250 as described above, the phosphorus removal is added by adding an additional phosphorus removal process to transfer the phosphorus contained in the supernatant to the chemical treatment tank 260 to add a flocculant or the like. The efficiency can be improved.

However, the above-described method is a situation that the problem of affecting the microbial treatment step by killing microorganisms by the introduction of chemicals, which excludes the installation of chemical treatment tanks, and also the removal efficiency of organic matter, suspended solids nitrogen and phosphorus is low. In addition, because the sewage treatment facility itself is huge, it is not sufficient to be commercialized by general livestock farms or small and medium enterprises due to burden of installation cost and lack of installation site.

Accordingly, the present invention is to solve the above-mentioned problems. In the sewage treatment apparatus which prevents the efficiency decrease due to the killing of microorganisms while providing a chemical treatment tank, the present invention has an upflow type between the chemical treatment tank and the biofilm filtration apparatus. By providing an inclined plate settling tank, the sludge contained in the chemically treated water is more easily precipitated, and the purpose of removing the suspended solids more effectively.

In addition, the sludge is precipitated by retaining the mixed liquid remaining in the lower portion for a predetermined time without passing through a plurality of filter slant plates, and then washing the same by using the air injected from the washing air supply pipe connected to the air compressor, thereby further improving sludge removal efficiency. It also has a purpose to increase.

The present invention for achieving the above object is a sewage treatment apparatus equipped with a slant plate settling tank between the chemical treatment tank and the biofilm filter, the slant plate settling tank, chemical treatment water transfer pipe, sludge discharge pipe, sludge conveying pipe, washing An air supply pipe, and a transfer pipe connected to the biofilm filtration device, are fixed to the inside of the housing, the inlet guide for guiding the flow of chemical treatment water, and fixed to the inside of the other plate to guide the supernatant to the transfer pipe. It characterized in that it comprises a discharge guide, a filter portion consisting of a plurality of filter inclined plate mounted between the inlet guide and the discharge guide, and a conveying pump mounted on the lower portion of the housing and connected to the end of the sludge conveying pipe.

1 is a schematic view showing the sewage treatment apparatus to which the inclined plate settling tank of the present invention is applied.

Figure 2 is a schematic view showing a gradient plate settling tank of the present invention.

Figure 3 is a schematic diagram of a process showing a conventional sewage treatment method.

<Explanation of symbols for main parts of the drawings>

1: flow adjustment tank

2: chemical treatment tank

21: chemical treatment water transfer pipe

3: slant plate precipitation tank

31: transfer pipe

32: sludge discharge pipe

33: sludge transport pipe

34: housing

341: one side plate, 342: the other side plate, 343: lower plate, 343a: inclined portion,

343b: sludge collecting unit

35: inflow guide

351: horizontal plate, 352: vertical plate

36: discharge guide

361: horizontal plate, 362: vertical plate

37: filter unit

371: filter inclined plate

38: conveying pump

4: biofilm filtration device

5: discharge tank

8: air compressor

81: cleaning air supply pipe

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

1 shows a sewage treatment apparatus by microbial contact to which the inclined plate sedimentation tank of the present invention is applied.

One side flow rate adjusting tank (1) for transferring the introduced sewage to the chemical treatment tank; A chemical treatment tank 2 for mixing the flocculant into the sewage transferred from the flow rate adjusting tank 1 and then transferring the chemically treated mixed liquid to the gradient plate settling tank 3; The sludge contained in the mixed water transferred through the chemical treatment tank (2) is precipitated, the supernatant is transferred to the biofilm filtration device (4), and a part of the precipitated sludge is returned to the chemical treatment tank (2), and excess sludge Inclined plate settling tank (3) for discharging the outside; A biofilm filtration device (4) provided with an anaerobic tank (41) and an aerobic tank (42) at the bottom to remove organic substances in the mixed water transferred from the gradient plate settling tank (3); The treated water transferred from the biofilm filtration device 4 is kept for a predetermined time to discharge the purified supernatant, and a portion of the precipitated sludge mixture is returned to the anaerobic tank 41 which is the biofilm filter 4, and the precipitated It is characterized by consisting of a discharge tank (5) for discharging a portion of the sludge to the outside.

Hereinafter, the sewage treatment method through the sewage treatment apparatus configured as described above is as follows.

First, the first step of transferring the sewage to the flow rate adjustment tank (1) provided with the screen filtration membrane; A second step of mixing the sewage transferred from the flow rate adjusting tank 1 with the coagulant and transferring the sewage to the chemical treatment tank 2; The mixed liquid chemically treated in the chemical treatment tank (2) is transferred to the gradient plate settling tank (3) to precipitate sludge, and the purified supernatant is transferred to the biofilm filtration device (4) described below, and a part of the precipitated sludge is transferred to the chemical treatment tank. A third step of returning to (2) and discharging a part to the outside; A fourth step of passing the mixed liquid transferred from the gradient plate settling tank (3) through a biofilm filtration device (4) composed of an anaerobic tank (41) and an aerobic tank (42); The purified water is transferred through the biofilm filtration device (4) to the discharge tank (5) to settle the sludge, and the purified supernatant is discharged, and some of the precipitated sludge is returned to the biofilm filtration device (4). Is characterized by consisting of a fifth step of discharging to the outside.

Therefore, the present invention, in the sewage treatment apparatus consisting of a flow rate adjustment tank (1), a chemical treatment tank (2), a gradient plate settling tank (3), a biofilm filtration device (4), and a discharge tank (5), as described above, the gradient plate settling tank As for (3), the structure is demonstrated with reference to FIG. 2 as follows.

The chemical treatment water transfer pipe 21 to which the mixed water is transferred, the sludge discharge pipe 32 for discharging the sludge to the outside, the sludge conveying pipe 33 for conveying the mixed liquid to the chemical treatment tank 2, and the washing air supply pipe 81 are provided. One side plate 341 to be mounted, the other side plate 342 to which the transfer pipe 31 connected to the biofilm filtration device 4 is mounted, and the inclined portion 343a and the sludge collecting portion 343b, which are located at the bottom. A housing 34 composed of a lower plate 343 in which is formed;

An inlet guide (35) fixed to an inner side of the one side plate (341) and consisting of a horizontal partition plate (351) for blocking an upper portion and a vertical partition wall (352) for guiding the flow of the mixed water;

A discharge guide (36) fixed to the inside of the other side plate (342) and comprising a horizontal partition (361) for blocking the lower portion and a vertical partition (362) for guiding the discharged supernatant to the transfer pipe (31);

A filter part 37 including a plurality of filter inclined plates 371 mounted between the vertical bulkhead 351 of the inlet guide 35 and the vertical bulkhead 362 of the discharge guide 36;

Mounted on the upper side of the sludge collecting unit 343b, characterized in that consisting of a conveying pump 38, the end of the sludge conveying pipe 33 is connected.

In particular, the ends of the sludge discharge pipe 32 and the washing air supply pipe 81 mounted on the one side plate 341 is located below the sludge collecting part 343b, and the sludge collected in the sludge collecting part 343a. When the amount of is accumulated above a predetermined amount, the sludge discharge pipe 32 is opened and at the same time the cleaning air is injected from the washing air supply pipe 81, the accumulated sludge is completely discharged to the outside through the sludge discharge pipe 32. It is discharged. In addition, the washing air supply pipe 81 is connected to a separate air compressor (8).

That is, in the inclined plate settling tank (3), the sludge is removed by retaining the mixed solution for a predetermined time, and then, the sludge is precipitated by washing the air using the air supplied through the cleaning air supply pipe (81) connected to the air compressor (8). To increase.

In addition, the upper end of each filter inclined plate 371 constituting the filter unit 37 toward the vertical plate 352 of the inlet guide 35, the lower end is inclined toward the vertical plate 362 of the discharge guide (36). Filter slant plates 371 are mounted at equal intervals, so that the mixed water flowing therein The filter is filtered while passing through the filter slope plate 371. The filter slope plate 371 is formed of a mesh.

Hereinafter, the operation of the inclined plate settling tank of the present invention configured as described above is as follows.

1 and 2, when the mixed water chemically treated through the chemical treatment tank 2 is introduced into the housing 34 through the chemically treated water transport pipe 21, the introduced mixed water is introduced. At the same time as being moved to the lower portion of the vertical plate 351 constituting the guide 35 to rise again to pass through a plurality of filter slope plate 371.

After passing through the filter inclined plate 371, the supernatant flows into the discharge guide port 36 formed on the other side of the housing 34, and is transferred to the biofilm filtration device 4 through the transfer pipe 31. The sludge falling to the lower portion of the filter inclined plate 371 is collected by the sludge collecting portion 343b formed in the lower plate 343.

Next, a part of the mixed water collected by the sludge collecting part 343b is returned to the chemical treatment tank 2 through the sludge conveying pipe 33 and flows back into the inclined plate sedimentation tank 3, while the collected sludge is It is to perform the action of discharged to the outside through the sludge discharge pipe (32).

That is, the inclined plate settling tank 3 is converted from the conventional downflow type to the upflow type. When the inclined plate settling tank 3 is made upflow type, sludge settling becomes easier, and thus, suspended matter can be more effectively removed. .

As described above, by providing the upflow type inclined plate settling tank between the chemical treatment tank and the biofilm filtering device, it is possible to increase the treatment efficiency of the sludge contained in the mixed water.

In addition, by forcibly discharging the sludge precipitated in the inclined plate settling tank through the cleaning air supply pipe, it also has the effect of completely discharged sludge to the outside.

Claims (3)

In the sewage treatment apparatus by microbial contact in which the inclined plate sedimentation tank 3 is attached between the chemical treatment tank 2 and the biofilm filtration apparatus 4; The inclined plate settling tank (3) is; One side plate 341 on which the chemically treated water transport pipe 21, the sludge discharge pipe 32, the sludge transport pipe 33, and the washing air supply pipe 81 are mounted, and a transport pipe connected to the biofilm filtration device 4 ( A housing 34 composed of the other side plate 342 on which 31 is mounted, and a lower plate 343 disposed on the lower side and having an inclined portion 343a and a sludge collecting portion 343b formed thereon; An inlet guide (35) fixed to the inner side of the side plate (341) and comprising a horizontal partition (351) for blocking the upper portion and a vertical partition (352) for guiding the flow of the chemical treatment water; A discharge guide (36) which is fixed to the inside of the other side plate (342) and consists of a horizontal partition (361) blocking the lower portion and a vertical partition (362) for guiding the discharged supernatant to the transfer pipe (31); A filter part 37 including a plurality of filter inclined plates 371 mounted between the vertical bulkhead 351 of the inflow guide 35 and the vertical bulkhead 362 of the discharge guide 36; Inclined plate settling tank of the sewage treatment apparatus according to the microorganism contact is characterized in that it is mounted on the upper side of the sludge collecting unit (343b) and is composed of a conveying pump (38) connected to the end of the sludge conveying pipe (33). According to claim 1, wherein the end of the sludge discharge pipe 32 and the cleaning air supply pipe 81 mounted on the one side plate 341 is located below the sludge collecting portion (343b), the sludge discharge pipe (32) Inclined plate settling tank of the sewage treatment apparatus by contact with microorganisms, characterized in that the washing air is injected in conjunction with the opening of the valve mounted on the washing air supply pipe (81). The filter inclination plate 371 of the filter unit 37 is formed of a mesh, and an upper end of the filter inclination plate is inclined toward the vertical plate 352 of the inlet guide 35, and a lower end thereof is discharged. Inclined plate settling tank of the sewage treatment apparatus by contact with the microorganism, characterized in that the mixed water is inclined toward the vertical plate 362 of the guide (36).