KR200367936Y1 - A reacting plant for tertiary sewage treatment system - Google Patents

Abstract

The present invention has branched weirs of predetermined length on both sides of the main ware installed on the outlet side of the reactor for treating the sedimentation effluent by physical, chemical, and biological reactions. The present invention relates to a reaction tank of sewage and wastewater tertiary treatment systems capable of preventing the outflow of sewage and ensuring good discharge water quality.

The present invention provides a space filled with a filter medium for depositing and removing contaminants contained in the sedimentation effluent by biological and physical and chemical reactions, and a predetermined slope in which the bottom surface is upward from the inflow side to the outflow side. Frame having; A ware installed at an upper portion of the outflow water side of the frame and provided with a main channel for discharging the treated water flowing out to the outside and a branch channel extending from the both sides of the main channel by a predetermined length; And a second rectifying wall installed across the bottom of the main channel of the ware from the bottom of the main channel to the frame and having a plurality of through-holes formed in a predetermined section of the lower portion thereof.

Description

A REACTING PLANT FOR TERTIARY SEWAGE TREATMENT SYSTEM}

The present invention is applied to the sewage and sewage and wastewater tertiary treatment system that can be used as reused water for each purpose, such as the sewage treatment plant sedimentation effluent. The present invention relates to a reactor for sewage and wastewater tertiary treatment systems that can reduce the load of overflowed water that flows through the weirs.

In general, the main pollutants contained in sewage and sewage are solids, organics, nitrogen and phosphorus. As a method of treating such pollutants, as shown in Figure 1, it is classified into the first treatment, the second treatment, the third treatment according to the treatment method, the first treatment physically removes suspended solids having good sedimentation properties The secondary treatment, which is the main treatment step, is the treatment of dissolved organics and organic solids, mainly using biological methods. Tertiary treatment uses physical, chemical, and biological treatments to remove organics and nutrients that have not been removed in the secondary treatment to maintain high quality treated water.

Here, the most widely used method for biological secondary treatment is activated sludge, and the organic removal rate is aimed at an average of 90%. However, biological secondary treatment methods that normally operate also have a limitation in treating pollutants, and thus, tertiary treatment is required to maintain high quality treated water.

Tertiary treatment of sewage uses the following methods depending on the material to be treated. Rapid sand filtration, flocculation sedimentation and membrane separation are used for organic substances including suspended solids. Biological nitrification / denitrification is used for nitrogen in nutrients. Other biological methods, the simultaneous removal of biological nitrogen and phosphorus, and the above modification method are widely used.

These tertiary treatment methods are not only difficult to maintain due to frequent backwashing, are expensive, but also require a reactor to remove nitrogen and phosphorus, and require high maintenance technology. have.

In order to solve the problems of the sewage and wastewater tertiary treatment methods listed above, the applicant of the present application in the domestic patent application No. 10-2001-0064830 filled a porous media with a high surface area and high porosity in the cross-flow sedimentation / filter paper Third-party treatment apparatus and method for sewage using porous media that can be utilized as reused water for each purpose, such as water, by optimizing chemical and biological reactions to simultaneously remove organic substances and nutrients contained in sedimentation effluent, and Korea Patent Application No. 10- In 2002-0079194, by installing a horizontal bottom plate step by step on the bottom slope of the reaction tank, and by installing a pipe having a different ejection hole in the horizontal bottom plate, the size of the air bubbles is uniform, and blows at a uniform speed Sewage and wastewater tertiary treatment system to uniformly and reliably wash the porous media filled in the reactor The backwashing device has proposed bar.

The reactor applied to the patents proposed by the applicant has a configuration as shown in FIGS. 2 and 3.

That is, as shown in the figure, the reaction tank and the inlet tank 101; It is divided into a shear reactor (102), a rear reactor (103) and a discharge tank (104) by the flow stream wall (105), and the inlet area of the shear reactor (102) to equalize the flow velocity distribution of the sedimentation effluent. Is formed to be larger than the outlet area of the rear stage reaction tank (103). This structure prevents flow velocity imbalance in consideration of the reduction of the cross-sectional area due to sludge deposition at the front end of the reactor. That is, the sludge is mainly deposited in the shear reaction tank 102, so that the water permeability is likely to be lowered by varying the area ratio as described above to maintain a smooth maintenance and treatment efficiency continuously.

In addition, a separate upper rectifying wall 106 extending toward the inside of the rear stage reaction tank 103 is installed in the middle portion of the flow stage flow wall 105 that divides the rear stage reaction tank 103 and the discharge tank 104, and discharged. By installing a weir at the top of the tank side, the flow of the upper inlet of the rear end reaction tank 103 flows into the ware through the upper outlet of the rear end reaction tank 103, and the flow of the lower inlet of the rear end reaction tank 103 is the rear end reaction tank. Ascending through the lower outlet portion of the 103 to be introduced into the weir to minimize the dead space in the tank of the front end reaction tank 102 and the rear end reaction tank 103.

The reactor having the above structure does not require separate driving power by using horizontal flow by gravity, and there is less air clogging than general filtration method, and the backwash cycle is much longer than other methods, which requires less power. It works.

However, in the conventional reaction tank presented above, there is a problem that the load of the overflow water flowing through it increases because the weir has a constant width and length. That is, the overload load rate of the weir is increased according to the variable flow rate through the weir, so that the inflow water to be treated in the reactor is discharged in an untreated state, or flocs deposited at the rear of the reactor are floated. Since it can be discharged through the wear has a problem that is difficult to secure good water quality.

Therefore, the present invention has been proposed to solve the above problems, and has a branch channel having a predetermined length on both sides of the main channel installed on the outlet side of the reactor for treating the sedimentation basin effluent by physical, chemical and biological reactions. By increasing the total area of the weir consisting of the main and branch channels, it reduces the overload load and prevents the flow of sedimented flocs, thereby providing a reactor for the sewage and wastewater tertiary treatment system that can ensure good discharge water quality. The purpose is.

1 is a schematic diagram of a sewage and wastewater tertiary treatment system using porous media according to the prior art;

Figure 2 is a schematic diagram showing the configuration of a reaction tank applied to the sewage and wastewater tertiary treatment system according to the prior art.

Figure 3 is a state diagram showing the flow of treated water using the reaction tank of FIG.

Figure 4 is a front view showing the configuration of an embodiment of a reaction tank applied to the sewage and wastewater tertiary treatment system according to the present invention.

Figure 5 is a perspective view showing the configuration of the main body of the present invention.

Figure 6 is a relationship between the length of the first branch channel and the second branch channel of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: framework 2: catch channel

3: sluice 4: first commutation wall

5: pocket 6: drain valve

7: ware 8: the second rectifying wall

11: main channel 12, 13: first and second branch channels

In order to achieve the above object, the present invention provides a space filled with a filter medium for depositing and removing contaminants contained in the sedimentation effluent by biological reaction and physical and chemical reaction, and the bottom surface is in the inflow direction from the inflow side. A frame having a predetermined upward slope; A ware installed at an upper portion of an outflow water side of the frame and provided with a main channel for discharging the purified and overflowing treated water to the outside and first and second branch channels extending by a predetermined length from both sides of the main channel; And a second rectifying wall installed across the bottom of the main channel of the ware from the bottom of the main channel to the frame and having a plurality of through-holes formed in a predetermined section of the lower portion thereof. The first and second branch channels may extend at a constant angle with the main channel, but each branch channel and the main channel may be perpendicular to each other. In general, the second rectifying wall is preferably installed upright with respect to the bottom surface of the frame.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 4 to 7.

The reaction tank of the sewage and wastewater tertiary treatment system according to the present invention is implemented to reduce the overload load rate by increasing the area of ware in a predetermined tank. As shown in FIG. Shows a structure installed symmetrically on both sides about one central channel. However, in the present embodiment, it is well known by those skilled in the art that the reactor is not limited to having such a symmetrical structure, and can be configured as a single reactor.

In the present invention, only one reaction tank will be described based on the central channel among the two symmetrically configured reactors.

As shown in the drawing, the reactor is provided with a space (1a) for filling the filter medium for depositing and removing contaminants contained in the sedimentation effluent by biological and physical and chemical reactions, the bottom surface of the inlet side A frame body 1 having a predetermined inclination θ that is upward in the outflow water side; A water collecting channel (2) formed at an upper portion of the frame body to form a central flow passage to collect sedimentation basin effluent flowing from the outside, and to form an access cavity (2a) in the lower portion; A water gate (3) installed at a side of the water collecting channel (2) and opened and closed to introduce the sedimentation effluent flowing therethrough into the framework (1); The first is installed upright in the frame (1) at a predetermined distance from the water gate (3), a plurality of through holes (4a) is formed in order to equalize the flow rate of the sedimentation effluent flowing through the catchment channel (2) A rectifying wall 4; A pocket (5) installed on a bottom surface of the frame (1) on one side of the first rectifying wall (4), for collecting and discharging the deposited sludge; A drain valve (6) installed at a predetermined position of the access hole (2a) to discharge and remove the deposition sludge collected in the pocket (5) to the outside; A first channel installed at an upper portion of the outlet side of the frame body 1 and extending at a right length from both sides of the main channel 11 and the main channel 11 for discharging the treated water flowing out to the outside; A wear 7 having second branch channels 12 and 13; And a second rectifying wall 8 installed upright from the bottom of the main channel 11 of the weir 7 to the bottom surface of the frame 1 and having a plurality of through-holes 8a formed in a lower predetermined section. Include.

Here, the frame 1 is a shear reaction portion where the water collecting channel 2 is located, the rear reaction portion is where the weir 7 is located, the inlet water shear reaction through the first rectifying wall (4) It has a rectangular structure that flows crosswise from the part toward the rear stage reaction part.

As shown in FIG. 5, the second rectifying wall 8 has a plurality of through holes 8a formed only at a lower portion corresponding to one half of the total height, so that the second rectifying wall 8 flows the treated water flowing in the frame 1 in the transverse direction. It is separated into the upstream and downstream water, but has a structure to be overflowed to the weir (7) by varying the monthly time. This allows the upstream water having a low SS (Soluble Solid) concentration and the downstream water having a high SS concentration are separated and flowed by the second rectifying wall 8, and the upstream water flows into the first branch channel 12 of the weir 7. The downstream water passing through the through hole 8a rises at the rear end of the second rectifying wall 8 and flows to the second branch channel 13 so as to increase the precipitation efficiency. Although it is mentioned that a plurality of through holes 8a are formed at 1/2 or less of the overall height of the second rectifying wall 8 in order to separate the treated water flowing in the frame 1 into the upstream water and the downstream water. The skilled person will recognize that the number 1/2 is merely an example.

The first and second branch channels 12 and 13 installed at both sides of the main channel 11 of the weir 7 are installed to reduce the overload load of the weir 7, and at this time, the rear end reaction in the shear reaction part. The first branch channel 12 is the first branch channel 12 where the treated water flowing into the negative water is first, and the second channel is the opposite channel.

As shown in FIG. 6, the length of the wear 7 refers to a length obtained by adding up the lengths of the branch paths branched from both sides of the main wear 11, and are determined in consideration of the variable flow rate.

In the present embodiment, the first branch channel 12 is formed to be longer than the length of the second branch channel 13 by a predetermined length. Preferably, the first branch channel 12 and the second branch channel 12 are formed. The ratio of the furnace 13 is 6: 4-7: 3. In this figure, an example in which three first branch channels 12 and two second branch channels 13 are installed is shown. In this case, the total length of the first branch channel 12 is shown. (Length which added all L1-L12) is formed longer than the total length (length which added all L'1-L'9) of the 2nd branch channel 13.

The branch channels having different lengths are provided on both sides of the main channel 11 so that the upstream water flowing from the upper side of the cross flow type frame 1 has a low SS concentration, while flowing through the first branch channel 12. Since the flow rate of the water is large, the length of the ware should be long, and the downstream water flowing from the lower side has a high SS concentration due to sludge settling, while the flow rate of the treated water flowing through the second branch channel 13 is increased. This is because the length of the wear may be relatively short because it is small.

In this way, by varying the overflow time by the difference in the lengths of the first and second branch channels 12 and 13, not only the overload load passing through the weir 7 can be reduced, but also the rear end of the second rectifying wall. Flocs deposited on the surface can be prevented from floating and overflowing to the weir.

If the lengths of the first and second branch channels 12 and 13 are equal to 1: 1, the flow rate flows into the first branch channel 12 relative to the second branch channel 13. In view of the structural characteristics with a large amount of passage flow rate, since the overflow load rate of the upstream water flowing into the first branch channel 12 increases, it passes through the lower through-hole 8a of the second rectifying wall 8 to the second. Stable water quality because the downstream treated water having a high SS concentration to be flown to the branch channel 13 rises before passing through the second rectifying wall 8 through the through hole 8a and flows to the first branch channel 12. You can't achieve that.

The reactor according to the present invention configured as described above is a cross-flow sedimentation / biofilter mainly dependent on the gravity precipitation principle of the natural flow method that does not require additional power, and describes its working state.

First, the sedimentation effluent treated in the secondary sedimentation basin is stored in the central channel formed by combining the catchment channels of the two frameworks (1), and when the water gate is opened, the framework (1) through the first rectifying wall (3) ) Flows inside. The framework 1 is filled with a porous mediator having a surface area and voids of a predetermined size, and the inflow water is passed through the mediator to deposit and decompose suspended matter and organic substances remaining in the sewage by physical, chemical and biological reactions. do.

The treated water treated by the biological action as described above flows to the rear stage reaction part of the framework 1 in a crossflow manner. At this time, the sludge deposited in the front end reaction part of the frame 1 and the sludge deposited in the rear end reaction part is accumulated in the pocket (5) installed on the bottom surface of the frame on one side of the first rectifying wall (3). The sludge accumulated in the pocket 5 is transferred to an external concentration tank through a drain valve 6 installed in the access hole 2a for treatment or dehydration.

The treated water in the framework 1 flows horizontally while the upstream water flows at a low SS concentration while the downstream water flows at a high SS concentration.

The upstream water flows up through the second rectifying wall 8, flows through the first branch channel 12, and flows into the main channel 11, and the downstream water flows through the second rectifying wall 8. After depositing the sludge through 8a, it floats and flows through the second branch channel 13 to flow into the main channel 11.

At this time, since the length of the first branch channel 12 is sufficiently long, the overflow load ratio of the weir 8 is reduced, and when the downstream water having a high SS concentration passes through the through hole 8a, floc ) Is stably deposited to improve water quality discharged through the weir.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and will be apparent to those skilled in the art without departing from the technical spirit of the present invention.

As described above, according to the present invention, by providing a plurality of diverging waterways in the ware of the reactor, the ware length is sufficiently secured, so that the overload load ratio can be reduced as much as possible regardless of the fluctuation of the passing flow rate.

In addition, the second rectifying wall is divided into two half of the height so that the upstream and downstream flow times are different, that is, the lower wall is formed with a plurality of through-holes so that the downstream water passes through the upstream water. It is formed in a structure to overflow the furnace, to stabilize the flocks deposited on the rear end of the second rectifying wall to prevent the outflow to the wear, thereby having another effect of ensuring a good discharge water quality.

Claims (8)

A frame filled with a filter medium for depositing and removing contaminants contained in the sedimentation effluent by biological reactions and physical and chemical reactions, and having a predetermined slope in which the bottom surface is upwardly directed from the inflow side to the outflow side; A ware installed at an upper portion of an outflow side of the frame and provided with a main channel for discharging the purified water flowing out and the first and second branch channels extending by a predetermined length from both sides of the main channel; And A second rectifying wall installed across the bottom of the main channel of the weir from the bottom of the main channel and having a plurality of through holes formed in a predetermined section of the lower part; Reactors for sewage and wastewater tertiary treatment systems. The reaction tank of the sewage and wastewater tertiary treatment system of claim 1, wherein the first and second branch channels are perpendicular to the main channel. The method of claim 1, The frame is A catchment channel formed at an upper portion to collect sedimentation effluent flowing out from the outside, and having a water gate at least at one side, and an access cavity formed at a lower portion of the water gate; A first rectifying wall installed upright at a predetermined distance from the water gate of the catchment channel, and having a plurality of through holes formed to equalize a passage flow rate of the sedimentation effluent flowing through the catchment channel; A pocket installed on the bottom surface of one side of the rectifying wall and collecting and depositing the sludge; And A drain valve installed at a predetermined position of the entrance and exit hole to discharge and remove the deposition sludge collected in the pocket to the outside; Reactors for sewage and wastewater tertiary treatment systems. The method of claim 3, wherein The framework is a reaction tank for sewage and wastewater tertiary treatment systems, characterized in that the catchment canal is installed symmetrically on both sides with the central canal. The method of claim 1, The first and second branch channels provided on both sides of the main channel of the weir are characterized in that the length of the first branch channel which is first contacted in the direction in which the treated water flows is formed longer than the length of the other second branch channel by a predetermined length. And reactors for wastewater tertiary treatment systems. The method of claim 5, wherein A reaction tank of sewage and wastewater tertiary treatment system, wherein the length of the first branch channel and the second branch channel is provided at a ratio of 6: 4 to 7: 3. The method according to any one of claims 1 to 6, The second rectifying wall is installed upright with the bottom surface, and a plurality of through holes are formed only below a predetermined height of the entire height, so that the upper treated water and the lower treated water are separated from the second rectified wall and overflowed to the wear. Reactor of sewage and wastewater tertiary treatment system characterized by inducing. The reactor according to claim 7, wherein the predetermined height is 1/2 of the total height.