KR20210000431A - Porous Filter Bed System - Google Patents

Abstract

The present invention relates to a water treatment system comprising a filter having a porous structure. A filter member accommodated in the water treatment system is seated on a porous member, the contact of the incoming influent can be moved in the vertical direction, and a filter contact structure can be implemented, thereby capable of maximizing water treatment efficiency by greatly expanding the contact area and time while minimizing the energy consumption during treatment and reducing the residence time of the influent.

Description

Porous Filter Bed System {Porous Filter Bed System}

The present invention relates to a water treatment system (PFB System; Porous Filter Bed System) having a filter having a porous structure.

In general, the composition of pollutants in sewage, rainwater, and seawater desalination raw water consists of high concentrations of dissolved organic matter and suspended matter.In sewage treatment, the activated sludge method, which is a general biological treatment process, is used, and the water is dissolved through the precipitation process. Each concentration of organic matters (BOD: Biological Oxygen Demand) and soluble suspended solids (SS)) is treated at a low concentration of about 20 mg/L or less, and seawater desalination raw water is mainly dissolved air. It was treated using the flotation method (DAF: Dissolved Air Flotation).

In addition, the water quality of non-point pollutants, such as initial rain generated on the road surface during rainfall, had a high concentration of inorganic suspended solids, but the concentration of dissolved organic matter was very low, so it was discharged to the river without special treatment.

Until now, not only in Korea but in other countries around the world, it was determined that the pollution problem of rivers or rivers would be solved by treating only the pollutants contained in sewage water. However, the extent of improvement of river water quality did not decrease significantly, so recently it has undergone biological treatment and has been subjected to secondary sedimentation. After passing through, an additional filtration facility was installed and operated as a follow-up facility. In addition, it is mandated to discharge pollutants contained in rainwater into rivers after treatment.

As described above, the conventional method of removing low-concentration organic matter and suspended matter has been using sand filtration, a method of using a plastic or ceramic into fine particles as a carrier.

However, sand filtration has the disadvantage of requiring an excessive amount of complex sub-collecting facilities and operation systems at the bottom and site area.

In addition, when plastic or ceramic filtration is installed in a fixed bed, the removal of suspended matter and dissolved organic matter is performed only by the pores between the filter media, and the pores are usually blocked by slime generated by suspended matter and microbial activity, causing blockage of the flow path. As a solution to this problem, a fluidized bed operation method has been developed, but a problem in which microorganisms are desorbed due to collisions between filter media has been caused.

In addition, as described above, in a typical filter medium, the pores between the filter media provide a filtering space, and the flow of fluid flows in only one direction, such as from downward to upward or upward to downward, transversely along the pores. As a result, during continuous operation There is a problem in that the treatment efficiency decreases or the stability of the treatment efficiency decreases according to fluctuations in the inlet load.

Therefore, there is a need for an invention of a technology that minimizes clogging, which is a problem of conventional filter media, and at the same time maintains the ability to remove suspended substances while reducing energy consumption even during long-term operation.

In order to solve this problem, a mesh tube bed filter (MTBF) using a mesh tube bed filter (MTBF) in which cilia woven of synthetic yarn is formed as a water treatment device has been applied as in Korean Patent No. 10-0962014.

1 is a conceptual diagram introducing a filter bed module of such a mesh structure, in which five mesh tube filters (2, 3, 4, 5, 6) are arranged in both directions in a rectangular tank 1, and the center A plurality of bubble generators are installed at the bottom to circulate contact with the mesh tube by aeration and flow out to the top of the rear end to flow out.

However, this structure realizes high algae and suspended matter removal efficiency by the mesh tube, but by continuously giving up to maintain the contact time with the mesh tube, energy consumption is large, and residence time to maintain a constant removal efficiency. This lengthens the site area and causes a problem that requires about 30 minutes of backwashing a day due to clogging of the mesh tube.

Korean Patent Registration No. 10-0962014

Embodiments of the present invention have been devised to solve the above-described problems, and an object of the present invention is to seat a filter member accommodated in a water treatment system as a porous member, and to move the contact of the incoming water in the vertical direction and filter contact structure It is intended to provide a water treatment system that can provide a filter system capable of maximizing water treatment efficiency by greatly expanding the contact area and time while minimizing energy consumption during treatment and reducing the residence time of the influent water.

As a means for solving the above-described problems, in an embodiment of the present invention, as shown in the structure shown in FIG. 2, an inlet part 110 into which influent water for water treatment is introduced, and a discharge part for filtering and discharging the introduced influent water. A receiving portion 100 connected to the 120 and having a receiving space therein;

At least one porous filter part 130 disposed in the receiving part 100;

A blower unit 140 disposed in the receiving unit 100 and injecting air into the incoming water; It is disposed in the receiving part 100 and includes a solids outflow part 160 for removing suspended matter deposited therein,

The influent water flowing into the receiving part, the path passing through the porous filter part 130 is a first direction (X) from top to bottom of the receiving part 100 or a second direction from bottom to top (Y ) Via at least one of, and discharged to the discharge unit 120,

It is possible to provide a porous filter bed water treatment system.

According to an embodiment of the present invention, the filter member accommodated in the water treatment system is seated as a porous member, and the contact of the incoming influent can be moved up and down, and the filter contact structure can be implemented, thereby minimizing energy consumption during treatment and There is an effect of providing a filter system capable of maximizing water treatment efficiency by greatly expanding the contact time and area while reducing the residence time of.

1 shows a conceptual diagram of a water treatment system to which a conventional mesh tube type filter is applied. 2 shows the structure of a porous filter bed water treatment system according to an embodiment of the present invention.
3 illustrates another embodiment of FIG. 2.
4 illustrates a water treatment system according to another embodiment of the present invention.
5 shows a modified embodiment of FIG. 4.
FIG. 6 shows the Lab-scale reaction tank of the conventional MTBF system in FIG. 1, the inlet and outlet portions, and points for measuring sampling in the reaction tank, and FIG. 7 is a Lab- of the PFB system in the structure of FIG. The scale marks the points for measuring the sampling in the reactor, inlet, outlet, and reactor.
Figure 8 is a total suspended solids (TSS: Total Suspended Solid) concentration of 50, 70, 100 mg/L using Kaolin as a representative particulate matter in the influent in the conventional MTBF system and PFB system described above in FIGS. 6 and 7 It shows the result of analyzing the treatment efficiency by adjusting, and FIG. 9 shows the result of analyzing the TSS and turbidity concentration distribution inside the reaction tank of the conventional MTBF system and PFB system described above in FIGS. 6 and 7 .

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the embodiments, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, the size of each component in the drawings may be exaggerated for the sake of explanation, and does not mean a size that is actually applied.

2 shows a structure of a porous filter bed water treatment system (hereinafter, referred to as'the present invention') according to an embodiment of the present invention.

Referring to FIG. 2, the present invention is connected to an inlet unit 110 into which influent water for water treatment is introduced, and a discharge unit 120 for filtering and discharging the introduced influent water, and a receiving unit ( 100), at least one porous filter unit 130 disposed in the receiving unit 100, and a blower unit 140 disposed in the receiving unit 100 and injecting air into the incoming water Can be.

In particular, in the above-described structure, the influent water flowing into the receiving part, the path passing through the porous filter part 130 is in the first direction (X) from the top to the bottom of the receiving part 100 or from the bottom to the top. Through at least one of the second direction Y facing, it is operable to be discharged to the discharge unit 120.

Specifically, the receiving part 110 of the present invention is implemented in a structure capable of having a space through which a liquid to be treated such as influent water introduced into the interior can be introduced and moored, and a preferred example is shown in FIG. 2. As shown in the above structure, it may be implemented as a closed structure having an inlet unit 110 on one side and a discharge unit 120 for discharging treated water, which is treated water, on the other side.

In addition, a blower unit 140 capable of injecting high-pressure air bubbles may be provided at the lower bottom portion. When the blower unit 140 cleans the floating material attached to the porous filter unit 130 inside the receiving unit, the backwash water having a high flow rate introduced from the discharge unit 120 flows and cleans the attached floating material. And, it is possible to maximize backwashing efficiency by simultaneously performing air cleaning.

Further, in a preferred embodiment of the present invention, a plurality of unit accommodating portions are provided by providing a partition unit 150 that divides the interior of the accommodating unit 100 from an upper to a lower direction (hereinafter, the first direction (X)). To be able to do it. In the illustrated embodiment of FIG. 2, a structure in which one partition unit 150 is provided is illustrated, but is not limited thereto, and a plurality of partition units 150 may be provided to divide the unit into a plurality of unit accommodation units.

As an example, as shown in FIG. 2, the structure divided into two receiving portions will be described as an example, the receiving portion 100 of the present invention further includes a partitioning portion 150 partitioned along the first direction, and the partition The porous filter unit 130 may be disposed in at least one of the first receiving unit 101 and the second receiving unit 102 partitioned by the unit 150.

In this case, the porous filter unit 130 may be formed of a ceramic filter member for water treatment having porosity. Alternatively, a polyvinylidene fluoride-polyhexafluoropropylene copolymer or the like may be applied as a material for forming the microporous polymer film.

The porous filter disposed on the porous filter unit 130 may be implemented in a structure disposed in each of the first receiving unit 101 and the second receiving unit 102 as shown in FIG. 2. In this case, the inlet part 110 is provided on one side of the first receiving part 101.

The influent water introduced through the inlet part 110 passes through the first porous filter 132 disposed in the first receiving part 101 in the first direction X to communicate with the lower part of the partition part 150 The influent water introduced into the second receiving unit 102 through the unit 152 and introduced into the second receiving unit 102 forms a second porous filter 134 disposed in the second receiving unit 102. By passing through the two directions (Y), it moves to the discharge unit 120 provided on one side above the second receiving unit, and through this process, an efficient water treatment filtering operation can be implemented.

In the above structure, stirring or cleaning is performed by providing a strong air pressure through the blower part from the inside while allowing the path through the porous filter to pass through the porous filter. It is possible to increase the contact area.

To this end, the lower portion of the partition unit 150 may be opened to provide a communication unit 152 through which the first receiving unit 101 and the second receiving unit 102 communicate with each other.

3 illustrates another embodiment of FIG. 2.

The other structure may have the same structure as the structure of FIG. 2, but a flocculating flotation tank 170 capable of coagulating and treating contaminants inside the influent water rather than a porous filter may be disposed in one of the receiving portions. This does not have a filter member, and at the same time as the influent is introduced, a coagulant is added, and agitated through the stirrer 175, contaminants inside the influent are solidified and discharged through the solids outlet 160 at the bottom. So that it can be discharged in a way that In the structure of FIG. 3, a structure in which the solids outlet 160 is disposed below is illustrated, but the structure of the solids outlet may be installed in parallel or independently in the upper direction.

In the case of influent water from which the agglomerated solid is discharged, it is introduced into the adjacent second receiving portion 134, moves through the porous filter in the upper direction, and is then discharged through the treated water discharge unit 120.

That is, the inlet unit 110 is provided at one side of the first receiving unit 101, and the influent water introduced through the inlet unit 110 is a cohesive float separation tank disposed in the first receiving unit 101 Is introduced into the second receiving unit 102 through the communication unit 152 below the partition unit 150 through the first direction X, and the influent water introduced into the second receiving unit 102 is Passing through the second porous filter 134 disposed in the second receiving unit 102 in the second direction (Y), it moves to the discharge unit 120 provided at one side above the second receiving unit, and the processing process is performed. Will be performed.

In the case of the present embodiment, it may be applied in a hybrid method to increase water treatment efficiency through a porous filter while introducing a more efficient process of removing suspended solids through a flocculation and separation tank.

4 shows a water treatment system according to another embodiment of the present invention.

The basic structure is the same as that of FIG. 2, but there is a difference in that the arrangement of the inlet 110 is not arranged on one side of the receiving portion but is constructed to perform a partition function.

That is, in the structure of FIG. 4, in partitioning the receiving part 100, the receiving part 100 is divided into the first receiving part 101 and the second receiving part 102 along the first direction X. It can be implemented in a structure that further includes an inflow partition line 180 to partition.

In this case, the influent water introduced through the inlet unit 110 provided at one end of the inlet segment line 180 passes through the inside of the inlet segment line, and the first receiving unit 101 and the second receiving unit ( 102) to be guided downward.

In addition, the spaces of the first receiving portion 101 and the second receiving portion 102 are provided with a communication portion 154 communicating with each other in a structure penetrating the lower end of the inflow partition line 180, and It may be implemented in a structure in which a porous filter is disposed inside the first receiving portion 101 and the second receiving portion 102, respectively.

5 shows a modified embodiment of FIG. 4.

The basic structure is the same as that of FIG. 4, but the structure further includes at least one second blower part (192, 194, 196, 198) in the inner space of the first accommodation part 101 and the second accommodation part 102. Let it be implemented.

In the structure of FIGS. 4 and 5, the inflow partition line 180 replaces the partition part, and the influent water introduced through the inlet part flows through the central part of the receiving part, firstly flows into the receiving space on both sides, and floating substances are removed. It is applied in a way that is discharged through the discharge unit 120 later. In the structure of FIG. 5, the efficiency is doubled for high-concentration wastewater in that the backwashing efficiency of the filter member is enhanced through a plurality of second blowers 192, 194, 196, and 198.

Figure 6 (a) is an image of constructing the conventional MTBF (mesh tube filter system) in Figure 1, (b) is a conceptualization of the system of Figure 6 (a), Lab-scale reactor and inlet And the outlet and the points for measuring the sampling in the reaction tank.

7 (a) is an image of constructing a PFB (porous filter bed system) in the structure of FIG. 2, which is an embodiment of the present invention, and FIG. 7 (b) is a conceptual diagram of the PFB system of FIG. 7 (a), and Lab- The scale indicates the points for measuring the sampling in the reactor, inlet and outlet, and in the reactor. (However, in this image, ① is the inlet, the MTBF outlet in Fig. 6 is ‡F, and the PFB outlet in Fig. 7 is ‡H.)

8 is a treatment efficiency of influent and effluent water by adjusting the TSS concentration to 50, 70, 100 mg/L using Kaolin as a representative particulate matter in the influent in the conventional MTBF system and PFB system described in FIGS. 6 and 7 It shows the results of analysis.

In treatment efficiency, as TSS increased, the treatment efficiency of MTBF decreased significantly from 66.3% to 39.4%, whereas PFB showed a tendency to decrease slightly from 78.3% to 69.0%, and the turbidity removal efficiency was from 31.2% to 22.8% in MTBF. While decreasing, PFB tended to increase from 35.4% to 45.4%, confirming that PFB showed stable treatment efficiency even at high concentration of TSS inflow.

9 is a TSS in a reaction tank when the concentration of TSS is adjusted to 50, 70, 100 mg/L using Kaolin as a representative particulate matter in the influent in the conventional MTBF system and PFB system described in FIGS. 6 and 7 And turbidity distribution.

From the behavior of suspended solids in the reaction tank, it can be seen that in MTBF, the range of TSS and turbidity concentration is larger than that of the inflow TSS change, and the concentration is maintained at a high concentration in the reaction tank, and PFB has a smaller range of TSS and turbidity concentration compared to the TSS change amount. It was confirmed that the treatment was stably maintained at a relatively low concentration.

Therefore, in the water treatment system to which the system according to the present invention is applied, unlike the water treatment system using the existing mesh tube type filter, the received filter member is seated with a porous member, and the contact of the incoming water is moved up and down. And a filter contact structure, which minimizes energy usage during treatment and reduces the residence time of influent water, while greatly expanding the contact time and area to maximize water treatment efficiency. It is possible to secure efficiency that can eliminate the problem of high energy consumption and water treatment efficiency.

In the detailed description of the present invention as described above, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. The technical idea of the present invention is limited to the above-described embodiment of the present invention and should not be defined, and should not be determined by the claims as well as the claims and equivalents.

100: receiving part
110: inlet
120: discharge unit
130: porous filter unit
140: blower part
150: compartment
160: solids outflow part
170: coagulation wound separation unit
180: inflow compartment line

Claims (8)

A receiving unit 100 connected to an inlet unit 110 into which influent water for water treatment is introduced and a discharge unit 120 for filtering and discharging the introduced influent water, and having a receiving space therein;
At least one or more porous filter units 130 disposed in the receiving unit 100;
A blower unit 140 disposed in the receiving unit 100 and injecting air into the incoming water; And
A solids outflow part 160 for removing suspended substances deposited in the receiving part;
The influent water flowing into the receiving part, the path passing through the porous filter part 130 is a first direction (X) from top to bottom of the receiving part 100 or a second direction from bottom to top (Y ) Via at least one of,
Discharged to the discharge unit 120,
Porous filter bed water treatment system.
The method according to claim 1,
The receiving portion 100,
Further comprising a partition unit 150 divided along the first direction,
In a structure in which a porous filter is disposed in at least one of the first receiving portion 101 and the second receiving portion 102 partitioned by the partitioning portion 150,
Porous filter bed water treatment system.
The method according to claim 2,
The inlet part 110 is provided on one side of the first receiving part 101,
The influent water introduced through the inlet part 110 passes through the first porous filter 132 disposed in the first receiving part 101 in the first direction X to communicate with the lower part of the partition part 150 It flows into the second receiving part 102 through the part 152,
The influent water introduced into the second receiving part 102 passes through the second porous filter 134 disposed in the second receiving part 102 in the second direction Y, and is placed on one side of the upper part of the second receiving part. Moving to the provided discharge unit 120,
Porous filter bed water treatment system.
The method according to claim 2,
The method according to claim 2,
The inlet part 110 is provided on one side of the first receiving part 101,
The influent water introduced through the inlet part 110 passes through the flocculation separation tank disposed in the first receiving part 101 in the first direction X, and the communication part 152 at the lower part of the partition part 150 ) Through the second receiving unit 102,
The influent water introduced into the second receiving part 102 passes through the second porous filter 134 disposed in the second receiving part 102 in the second direction Y, and is placed on one side of the upper part of the second receiving part. Moving to the provided discharge unit 120,
Porous filter bed water treatment system.
The method according to claim 3 or 4,
Further comprising a solids outflow portion 160 provided below the first receiving portion 101 or the second receiving portion 102,
Porous filter bed water treatment system.
The method according to claim 2,
The receiving portion 100,
Further comprising an inlet partition line 180 for dividing the receiving part 100 into a first receiving part 101 and the second receiving part 102 along the first direction X,
The influent water introduced through the inlet section 110 provided at one end of the inlet section line 180 passes through the inside of the oil lip section line to the first and second receivers 101 and 102. Of the structure that is guided downward,
Porous filter bed water treatment system.
The method of claim 6,
The spaces of the first receiving portion 101 and the second receiving portion 102 are communicated with each other in a structure penetrating the lower end of the inflow partition line 180,
In a structure in which a porous filter is disposed in each of the first receiving portion 101 and the second receiving portion 102,
Porous filter bed water treatment system.
The method of claim 7,
Further comprising at least one second blower portion (192, 194, 196, 198) in the inner space of the first receiving portion 101 and the second receiving portion 102,
Porous filter bed water treatment system.

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