KR101845637B1 - Filtering apparatus for waste water treatment - Google Patents

Abstract

A filtering apparatus for wastewater treatment is disclosed. The filtering apparatus for wastewater treatment according to an embodiment of the present invention comprises: a wastewater tank in which the wastewater is contained; at least one disk filter comprising a filtering material which guides the wastewater inside the wastewater tank to an inner side and filters the wastewater; an outlet pipe connected to the disk filter to discharge the water filtered in the disk filter; and a washing device for removing sewage from both sides of the disk filter and discharging the sewage, wherein the filtering material is made of ion-exchange fibers.

Description

[0001] The present invention relates to a filtering apparatus for waste water treatment,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus, and more particularly, to a sewage treatment filter apparatus capable of filtering sewage through a disk filter composed of ion exchange fibers.

Household wastewater discharged from domestic sewage or factories contains various floats and dirt. The sewage purifying apparatus is a device for filtering and purifying various suspended matters or dirt from such wastewater.

In general, a filter device for sewage treatment includes a drum into which sewage flows, a plurality of disk-shaped filters installed around the drum for filtering the sewage and rotated by driving of the motor, and high- And a washer provided above the filter so that the filter can be cleaned. Further, the filter may be provided with a trough for receiving and discharging the dirt flowing from the inside of the filter during washing.

In this sewage treatment filter device, the sewage supplied to the central drum flows into the rotating filter, and is filtered while being discharged through the filter to the outside. The filtered suspended matter or dirt is accumulated inside the filter, and the purified water passes through the filter and is discharged to the outside through the outlet of the treatment tank. When cleaning is performed, high-pressure washing water is sprayed onto the outer surface of the filter while the filter rotates, so that the suspended matter or dirt on the inner side of the filter falls down to the trough.

However, since the sewage treatment filter device flows into the inside of the filter rotating the sewage through the drum and is discharged to the outside, the floating matter or the dust adheres or accumulates inside the filter. Therefore, there is a problem in that the amount of the suspended particles floating in the filter increases as the use of the filter is longer despite the cleaning of the filter, thereby reducing the purification treatment amount of the sewage. Further, since sewage is purified only in the lower region of the filter, the purification efficiency is low. In addition, such a sewage treatment filter device has a disadvantage that not only the washing efficiency is low but also the washing water is required in a large amount because the washing water is sprayed from the outside of the filter by washing the dirt adhered to the inside of the filter when the filter is washed. In addition, since it is difficult to partially replace the filter, it is difficult to maintain the filter, and when the filter is replaced, all operations must be stopped.

Particularly, the conventional sewage treatment filter device has a problem in that it is vulnerable to the removal of dissolved ionic substances (for example, arsenic, which is heavy metal), although it is easy to remove the floating matters.

In order to solve the problems of the prior art described above, it is an object of the present invention to provide a filter device for sewage treatment which can purify sewage water by using a disk filter composed of ion exchange fibers as a filtering material for sewage treatment.

A sewage treatment filter device according to the present invention comprises: a sewage tank containing sewage; At least one disk filter including a filtering member for allowing the sewage in the sewage tank to be introduced and filtered inward; An outlet tube connected to the disc filter for discharging the filtered water from the disc filter; And a washing machine for removing and discharging dirt adhering to both surfaces of the disk filter, wherein the filter member is formed of ion exchange fiber.

And the disk filter is made of ion exchange fiber for removing arsenic (As).

A plurality of the disk filters are installed so as to be spaced apart from each other, and the outlet pipes are detachably connected to the plurality of disk filters.

The cleaner includes a suction pipe that is rotatably attached to both surfaces of the disk filter, a driving motor that provides power for rotating the suction pipe, and a suction pump that provides a suction force to suck the dust into the suction pipe.

The disk filter is characterized in that the ion exchange function is regenerated by using a solution containing at least one of NaCl and NaOH.

According to the filter device for sewage treatment according to the embodiment of the present invention, since the sewage can be purified by using the disk filter composed of the ion exchange fiber, it is possible to purify the sewage, Arsenic and the like can be effectively removed.

In addition, according to the present invention, the disk filter having the treated water line separated from the water tank is formed so that the sewage is filtered from the outside of the disk filter through the inside thereof, and the disk filter and the treated water line are separated, Thereby enabling disk exchange. Further, as the sewage is filtered from the outside to the inside of the filter device, the water level difference as the driving force can be increased as the outside water level rises, so that the filtration area can be utilized as much as possible.

1 is a perspective view illustrating a filter device for sewage treatment according to the present invention.
Figs. 2A to 2D show a front view, a top view, a left side view, and a right side view of the filter device for sewage treatment shown in Fig.
3 is a reference view illustrating an image of three types of ion exchange fibers.
4 is a reference view illustrating an SEM analysis image of three types of ion exchange fibers.
Fig. 5 is a graph showing the diameter distribution for three kinds of ion exchange fibers. Fig.
FIG. 6 is a graph showing the arsenic adsorption distribution characteristics by pH for three types of ion exchange fibers. FIG.
7 is a graph showing the distribution of arsenic species according to pH.
8 is a graph showing arsenic desorption rate as a regeneration test using NaCl and NaOH.
9 is a graph showing arsenic recovery as a regeneration test using NaCl and NaOH.
10 is a graph showing regeneration effect of ion exchange fiber upon arsenic removal.

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

Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art, and the following embodiments may be modified in various other forms, The present invention is not limited to the following embodiments. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an," and "the" include plural forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, regions and / or regions, it should be understood that these elements, components, regions, layers and / Do. These terms do not imply any particular order, top, bottom, or top row, and are used only to distinguish one member, region, or region from another member, region, or region. Thus, the first member, region or region described below may refer to a second member, region or region without departing from the teachings of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the present invention should not be construed as limited to any particular shape of the regions illustrated herein, including, for example, variations in shape resulting from manufacturing.

FIG. 1 is a perspective view illustrating a filter device for sewage treatment according to the present invention, and FIGS. 2a to 2d show a front view, a top view, a left view, and a right side view of the filter device for sewage treatment shown in FIG.

1 to 2D, the filter device for sewage treatment includes a sewage tank 10 containing sewage such as domestic sewage or factory wastewater, a disk filter 20 installed in the sewage tank 10 in a submerged state, An outflow pipe 30 connected to the disk filter 20 for discharging the purified water and a washing machine 40 for removing dirt and suspended matters adhering to the disk filter 20.

The sewage tank (10) is in the form of a rectangular tank with an open top, and a sewage inflow pipe into which sewage flows is connected. The sewage tank 10 is not limited to a rectangular shape because it can accommodate sewage for purification treatment. The sewage inflow pipe may be installed in such a manner as to be connected to the sewage tank (10) or may be installed in such a manner that the sewage water enters through the upper opening portion of the sewage tank (10). The upper portion of the sewage tank 10 can also be opened and closed by a cover.

The disk filter 20 is provided in the form of a square panel and has a filtration part through which water flows on both sides so that sewage in the sewage tank 10 can be purified while being introduced into the sewage tank 10, And a purified water feeding passage. The purified water flow path is formed by a spaced space between the two side filtration parts. In the disk filter 20, a plurality of filtration sections on both sides are provided opposite to each other in the transverse direction within the sewage tank 10.

In the disc filter 20, the filtration parts on both sides include a filtration member made of a nonwoven fabric or porous fiber, an inner support part in the form of a grill for supporting the inner side of the filtration member, and a metal mesh or grill- And an outer support portion. This is because the sewage in the sewage tank can be purified while flowing into the purification tank through the filter members on both sides, and the filter member can be retained by the inner and outer supports.

According to the present invention, the filter member may be composed of ion exchange fiber. Ion exchange fibers include those having ion exchange properties, which have a large surface area, a high ion exchange rate, and also have a function of a filter cloth.

Hereinafter, performance analysis as a filter member using various ion exchange fibers will be described. The ion exchange fibers which can be applied in the present invention are Arsenic-ion adsorbing functional viscose rayon (hereinafter referred to as As-rayon) of KC31, SA, SA2 of Kanecaron (Japan) and daiwabo We have not been able to confirm the adsorption capacity of As-rayon against arsenic, and analyzed the characteristics based on three Kanecaron products.

3 is a reference view illustrating an image of three types of ion exchange fibers. Fig. 3 (a) shows ion exchange fibers of KC31, Fig. 3 (b) shows ion exchange fibers of SA, and Fig. 3 (c) shows ion exchange fibers of SA2. As shown in FIG. 3, it can be seen that all three fibers are in the form of bundles of short strands.

4 is a reference view illustrating an SEM analysis image of three types of ion exchange fibers. 4 (a) shows an SEM analysis image of KC31, FIG. 4 (b) shows an SEM analysis image of SA, and FIG. 4 (c) shows an SEM analysis image of SA2. As shown in FIG. 4, the SEM analysis of the ion exchange fibers revealed that all of the three fibers were in the form of cylindrical filamentous strands, and the surface of the fiber SA was smooth, but the surface of KC31 and SA2 It can be confirmed that it is somewhat rough.

Fig. 5 is a graph showing the diameter distribution for three kinds of ion exchange fibers. Fig. 5 (a) shows a diameter distribution of KC31, FIG. 5 (b) shows a diameter distribution of SA, and FIG. 5 (c) shows a diameter distribution of SA2. As shown in FIG. 5, the diameter was measured using ImageJ (NIH) based on the SEM analysis image of the ion exchange fibers, and it was found that most of the fibers had a diameter of 20-40 μm. The mean diameter of KC31 was the smallest at 21.79 ± 6.11 μm, SA was 23.52 ± 6.56 μm, SA2 was 26.23 ± 4.65 μm, and the average diameter and standard deviation of the three fibers were not significantly different.

The arsenic adsorption characteristics of such ion exchange fibers are as follows.

Modularity is also important in constructing a disk filter including ion exchange fibers. However, when the ion exchange capacity for arsenic is inferior, it is inevitably difficult to use the disk filter as a module material. When the contaminants are removed through ion exchange, the pH of the solution oxidizes or reduces the functional groups that cause the ion exchange on the surface of the ion exchange fiber, thereby greatly affecting its function. This is influenced not only by the type of functional groups used in ion exchange but also by the degree of quantification of functional groups. Therefore, it is expected that there will be differences in the results when evaluating the effect of pH using three fibers with different quantization degree.

FIG. 6 is a graph showing the arsenic adsorption distribution characteristics by pH for three types of ion exchange fibers, and FIG. 7 is a graph showing distribution of arsenic species by pH. 6 (a) shows arsenic adsorption distribution characteristics of KC31, Fig. 6 (b) shows arsenic adsorption distribution characteristics of SA, and Fig. 6 (c) shows arsenic adsorption distribution characteristics of SA2.

The effect of pH was tested by adjusting the pH of 0.133 mol / L (10 ppm) of As (V) solution to 0.1 ~ 2 with 0.1 M HCl and 0.1 M NaOH. Dissolve in 200 mL of arsenic solution with various pH, stir at 150 rpm, 30 ℃ for 6 hours using a constant temperature stirrer, and measure the arsenic concentration before and after the reaction by solid-liquid separation. At pH 2 and pH 12, all fibers failed to adsorb arsenic, although the adsorption pattern of arsenic was different according to pH.

KC31 showed the highest adsorption capacity at pH 4 and the adsorption capacity tended to decrease with increasing pH. However, SA and SA2 showed the highest adsorption at pH 10 and the adsorption capacity tended to decrease with lower pH. At this time, SA2 is not more prominent than SA. The tendency of fibrils according to the pH was considered to be influenced by the difference in the quantization level of the fibers and the type of ion species of arsenic depending on the pH.

As the pH is lower, the ion species of AsO43 - anion and H + ion are increased. As the pH is higher, the ion species of H + ion is dissociated. As a result, when the pH of the solution changes from 1 to pH 13, the main forms of arsenic ions are changed to 0, 1, 2, and 3, so that at pH 2, arsenic ions mainly form the neutral ion form of H3AsO4 Therefore, the ion exchange reaction does not occur well.

H + ions must be protonated to the amine group to initiate the ion exchange reaction. However, KC31 is slow in the ion exchange reaction in the neutral state because the functional amine group is unprotonated, that is, in the form of free amine. However, as the pH is lower, the amount of H + ions in the aqueous solution increases and the amine groups are quantized, increasing the functional groups in the fiber capable of adsorbing arsenic. Therefore, the adsorption capacity decreases as the pH increases in the range of pH 4-10.

SA has a protonated form in which the functional amine group is already H +. Therefore, unlike KC31, the concentration of H + in aqueous solution does not greatly affect the activation of the functional group since it already has H + ion. At the same time, as the pH increases, the arsenic ion species changes from zero to three, and the affinity with the fiber increases as the arsenic ion species becomes trivalent. Therefore, the arsenic adsorption capacity increases with increasing pH in the range of pH 4-10. At pH 12, however, the H + of the amine group is deprotonated to lose its adsorption capacity.

SA2 has half of the functional groups of the free amine form and the protonated functional groups (1.309 and 1.340 mmol / g, respectively). That is, due to the presence of a considerable amount of protonated amine groups, it is not largely affected by the activation / deactivation of the functional groups according to the change in the ambient pH, resulting in a tendency similar to that of SA as a whole. Therefore, the tendency is not remarkable compared to SA due to the presence of free amine type functional groups.

The regeneration evaluation of the above-mentioned ion exchange fiber will be described as follows. The anion exchanger is generally capable of regenerating the ion exchange function using NaCl or NaOH. Therefore, the regeneration of the ion exchange fiber should be guaranteed based on the chemical resistance in manufacturing the ion exchange disk filter.

FIG. 8 is a graph showing arsenic desorption rate as a regeneration test using NaCl and NaOH, FIG. 9 is a graph showing arsenic recovery as a regeneration test using NaCl and NaOH, FIG. 10 is a graph showing the regeneration effect FIG.

In order to reuse the ion exchange fiber adsorbed by arsenic, 0.1 M NaCl solution and 0.1 M NaOH solution can be used. After eluting the arsenic with NaCl and NaOH solution, add 1 mL of 0.08 M FeCl3 solution to 200 mL of the elution solution, and adjust pH to 5 to make a precipitate of Fe (OH) 3 and FeAsO4 type, Arsenic is recovered in the form. The arsenic concentration of the remaining solution after the arsenic recovery is measured and the amount of arsenic recovered is calculated. The regeneration solution can be selected based on the arsenic desorption rate and the arsenic recovery rate for the two solutions.

In the case of KC31 and SA2, the desorption rate was 100% when both NaOH and NaCl were used as the regeneration solution, and the desorption rate was 89.42% and 77.42%, respectively. When NaOH was used as the regeneration solution, the recovery of arsenic was lower than that of NaCl as the regeneration solution. This is because, when NaOH is used as a regeneration solution, the solution is in a state of a very high pH, and since the pH is lowered to 5, there are many Fe 3 + ions in the solution in Fe (OH) And it could be concluded that it did not produce FeAsO4 solid. Therefore, it is considered appropriate to select NaCl as a regeneration solution in consideration of arsenic recovery and environmental safety.

Table 1 below is a table comparing arsenic removal methods in sewage.

Removal technology Advantages Disadvantages Removal rate
(%) Cohesion Use of readily available substances
Operation is relatively easy, cheap
Effective at various pH ranges Harmful sludge formation
Different removal rates depending on flocculant
Additional processes are required 90
~ 94.5 activation
Alumina Relatively well known
Commercialized Replace after 4-5 uses 88 Nanoparticle
percolation Well-established
High removal rate High installation cost and maintenance cost
Need to control solution properties
Low water permeability 95 Reverse osmosis No harmful by-products are produced High technology requirements for process operation and maintenance 96 Electrodialysis Other contaminants can be removed Hazardous waste water generation 95 Ion exchange Good support and handling capacity
Relatively less dominant in pH
Arsenic selective removal possible An expensive support
High technology required for operation and maintenance 87

According to the above-mentioned Table 1, it can be confirmed that the disk filter including the ion exchange fiber is effective in removing the dissolved ionic material including the heavy oil and the heavy metal such as arsenic from the sewage.

The disk filter 20 is provided at its upper portion with a discharge guide portion for guiding the water of the purified water feeding passage to the discharge pipe 30 and a connection portion provided at the discharge guide portion for connecting the disk filter 20 to the discharge pipe 30. [ Device is provided. So that the purified water in the purified water feeding passage can be discharged to the outlet pipe 30 through the upper discharge guide portion. The connecting device may be a conventional pipe connecting coupling or a connecting socket or the like so that each disk filter 20 can be separated and exchanged separately.

The outflow pipe 30 is connected to the plurality of disk filters 20 to guide the outflow of the purified water while passing through each disk filter 20. The outflow pipe (30) is installed in the sewage tank (10) so that the purified water can be spontaneously discharged. That is, the water level of the lower tank 10 is set to be higher than the height of the outflow pipe 30, so that water can flow naturally toward the outflow pipe 30 by the water head difference. This is because the water in the sewage tank 10 is purified while flowing into the disk filter 20 and then spilled through the outflow pipe 30 so that no energy is required to perform the purification treatment. To this end, a water level sensor 13 for controlling the water level may be installed on the upper part of the sewage tank 10.

The washing machine 40 for washing each disk filter 20 includes a rotary tube provided in the sewage tank 10 so as to pass through the center of each disk filter 20, a driving part for rotating the rotary tube, And a plurality of suction units which are installed in close proximity to each other and rotate together with the rotary pipe.

Both ends of the rotating tube are rotatably supported by the sewage tank 10 and the space inside the rotating tube is formed by a flange-shaped partition provided at approximately the midpoint between the disk filters 20, As shown in Fig. Such a rotary pipe can be manufactured by connecting a plurality of pipes having flanges at both ends thereof so that their centers coincide with each other. In addition, a communication hole is formed in each of the rotary pipes at each point where the disk filter 20 is positioned so that the partitioned inner flow path communicates with its outer surface.

The drive unit includes a drive motor that is installed on the upper portion of the sewage tank 10 and incorporates a reduction gear device, a drive sprocket connected to the shaft of the drive motor, a driven sprocket installed on the rotary pipe in the sewage tank 10, As shown in FIG. So that the rotating tube can rotate when the driving motor rotates. Here, the driving motor and the rotary pipe are connected by a chain. However, the present invention is not limited to this, and the driving motor may be directly connected to the shaft connected to the rotary pipe from outside the sewage tank 10.

The suction units include a suction member extending in the radial direction from the rotary pipe and having a flow path therein and having a suction port facing the disk filter 20, And a support pipe communicating a flow path inside the rotary pipe. That is, one end of the support tube is connected to the suction member and the other end is coupled to the outer surface of the rotary tube. The support tube is detachably coupled to the second flange portion provided on the rotary pipe by bolt fastening. In addition, the first flange portion of the support pipe moves the position of the first flange portion so that long holes are formed at positions where the bolts are fastened so that the interval between the filtration portion and the suction member of the disk filter 20 can be adjusted. This makes it possible to easily separate or replace the suction unit for troubleshooting or the like, and adjust the mounting position of the first flange portion so as to adjust the gap between the disk filter 20 and the suction member. The two suction units on both sides of each disk filter 20 are installed in opposite directions so as to be balanced with each other and to realize smooth rotation.

The washing machine 40 is provided with a plurality of flow path connecting members for partitioning the surrounding of the communication holes of the rotary pipe, a plurality of suction pipes connected to communicate with the inside of each flow path connecting member and extending outside the sewage tank 10, And a suction pump connected to each suction pipe for sucking water and dirt by applying a suction force to the suction pipe.

The flow path connecting member is provided on the outside of the rotary pipe in such a manner that both ends thereof are closed and the inside diameter thereof is larger than the outer diameter of the rotary pipe and the rotary pipe passes through the center thereof. And each suction pipe is connected so that one end thereof communicates with the inside of the flow passage connecting member. This enables the sewage and dirt to be drawn into the rotary pipe through the suction unit to flow through the communication hole to the suction pipe while the rotary pipe is rotating.

Each disk filter 20 has a tube entrance portion cut from a central portion through which the rotary tube passes to a lower edge thereof so as to separate each disk filter 20 without detaching the rotary tube. In this case, when the disk filter 20 is detached, the connecting device is separated from the outflow pipe 30 and is lifted up to the upper side.

In addition, the channel connecting member is disposed at the central portion of each disk filter 20, and each suction pipe extends downwardly through the pipe entry portion of each disk filter, then bends laterally and then upwardly bent to form the sewage tank 10, As shown in FIG. And each suction pipe is connected to the suction pump through a connecting pipe. This allows the suction motor to operate while the suction pump is operating, thereby allowing the suction unit to rotate, thereby sucking dirt and floating matters adhering to the outside of each disk filter 20 to be cleaned. That is, when the suction pump operates, strong suction force acts on the suction port of each suction member provided adjacent to the filter portion of each disk filter 20, so that the dirt adhering to the outer surface of the filter portion of the disk filter 20, And is sucked inward. At the same time, since each suction member rotates together with the rotary pipe, it is possible to clean a large area (an area where the suction member reaches by rotation) of both outer surfaces of the disk filter 20.

Water and dirt that are sucked into the inside of each suction member are introduced into the respective flow paths inside the rotating tube partitioned into a plurality of parts and discharged to the outside through the suction pipe and the suction pump through the communication hole of the rotating tube. At this time, the water and the dirt discharged from the suction pump are collected in a separate treatment tank (not shown) provided upstream of the sewage tank 10, and then recycled to the sewage tank 10 and recycled or treated through a separate process .

When dust or foreign matter adhered to the outside of the disk filter 20 is cleaned by a suction method, a strong suction force acts locally on the outer surface of the disk filter 20 on which the suction member is located to suck up dirt or foreign matter, The position of the suction member is changed, and a large area of the filtration unit is cleaned. Therefore, the cleaning effect of the disk filter 20 can be enhanced compared to the conventional art. That is, washing with a stronger suction force than in the case of spraying with a high pressure as in the prior art has a high cleaning effect and is advantageous in energy efficiency. This is because the influence of the suction force is much greater than the spray force normally operating on the same area.

The cleaning operation may be performed by the user as needed, or may be automatically performed periodically by the control means of the apparatus. That is, it can be adjusted according to the concentration of suspended solids (pollution degree) in the process of performing the purification treatment. Preferably, the cleaning operation is performed once every 20 minutes. In addition, the filter device for wastewater treatment according to the present invention includes an electric opening / closing valve and a manual opening / closing valve provided for each suction pipe so as to selectively open / close each suction pipe. This is because when the cleaning operation is performed, the control means sequentially opens alternately for a set time through the electric opening / closing valve so that the suction force of the suction pump alternately acts selectively on any one of the disk filters 20, . This is possible because the inside of the rotary tube is divided into a plurality of flow paths, and the flow paths for cleaning the disk filters 20 are separately formed. Of course, the selective opening and closing of each suction pipe can also be realized by a method in which the user selectively operates the manual opening / closing valve.

The sewage treatment filter device of the present invention includes a plurality of stirring vanes capable of stirring the sewage in the sewage tank 10 while performing the cleaning operation of the disk filter 20. The stirring wing may be in the form of being installed on the suction member of each suction unit, or the stirring wing may be separately mounted on the rotary pipe, or the stirring wing may be provided on the support pipe of each suction unit. These stirring blades are rotated together with the rotary tube and stir the sewage, which can contribute to enhance the purification treatment effect of the sewage.

The following describes the overall operation of the filter device for sewage treatment.

The sewage introduced into the sewage tank 10 through the sewage inlet pipe is filled up to the set water level of the sewage tank 10 in which the water level sensor is installed. The sewage in the sewage tank 10 is purified while flowing into the inside of each disk filter 20 through the filter portions on both sides of the disk filter 20 and the purified water is supplied to the purifier- And is discharged to the outlet pipe 30 through the guide portion.

Since the height of the outflow pipe 30 is lower than the set water level of the sewage tank 10, the water flowing into the sewage tank 10 is naturally purified through the respective disk filters 20 and flowing toward the outflow pipe 30. Thus, the natural flow of water can reduce the energy because sewage can be purified. In addition, since the disk filters 20 are completely immersed in the sewage tank 10, and the water is purified using almost all of the disk filters 20, the purification efficiency can be increased. Therefore, the device can be downsized as compared with the conventional device having a similar processing capacity.

The cleaning of the disk filter 20 can be carried out without draining water during purification. At this time, the middle suction pump is operated to rotate the rotary pipe by the driving unit, so that the dirt attached to the outer surfaces of both sides of each disk filter 20 is sucked by the suction members together with the water. Since the suction ports of the suction members are close to the outer surfaces of the filter members on both sides of the disk filter 20 and strong suction force acts through the suction holes, the dirt adhered to both outer surfaces of the disk filters 20 is sucked into the suction member together with the water . The sucked dirt is discharged through the flow path, the flow path connection part, the suction pipe, the connection pipe, and the suction pump inside the rotary pipe.

Particularly, according to the present invention, since the opening and closing valve is selectively operated while performing the cleaning operation, the suction force of the suction pump alternately acts selectively on one of the disk filters 20, Can be further increased.

Also, this cleaning operation can be adjusted according to the suspended matter concentration of the influent water. Since the disk filter 20 is periodically executed every about 20 minutes, the disk filter 20 can maintain a good condition for purification. Since the cleaning operation is performed while the cleaning operation is performed and the time is short, the cleaning operation hardly affects the cleaning treatment. Also, since the driving motor and the suction pump operate only for a short time when the cleaning operation is performed, the energy consumption due to the cleaning operation is not so large. That is, energy consumption is remarkably lower than that of a conventional filter device for wastewater treatment, in which washing water is sprayed by a high-pressure pump while the disc filter is continuously rotated.

When the disk filter 20 is exchanged for long-term use, it can be separately exchanged as needed. Particularly, since each disk filter 20 has a tube entrance portion, it can be easily replaced without removing the rotary tube or the like. As described above, since the disc filters 20 can be easily and individually replaced, the present invention can be carried out while carrying out a cleaning operation. It is not necessary to separate the other parts of the apparatus or to drain the water for exchanging the disk filter 20.

As described above, according to the filter device for sewage treatment according to the embodiment of the present invention, the sewage can be purified by using the disk filter composed of the ion exchange fiber, so that the dissolved substances , And arsenic equivalent to heavy metals.

Table 2 below is a table comparing the filter device for sewage treatment according to the present invention with other general techniques for sewage treatment.

Veolia (France) Yuhong Fluid Co., Ltd. (Korea) Yoochun En Bairo (Korea) Invention Membrane type Filtration membrane Filtration membrane Filtration membrane, fiber Filtration membrane Membrane size 10 to 300 μm 10 to 30 μm - - Membrane material PE (HYDROTECH), stainless steel Polyester
(Sefar PETEX) - - Driving force Water level car Water level car Water level car Water level car Target SS, Algae, TP, etc. Wastewater, suspended matter of discharged water, etc. SS, TP, etc. SS, TP, etc. Filtration method Continuous filtration, inside -> outside Continuous filtration, inside -> outside Continuous filtration, inside -> outside Individual filtration,
Outside -> Inside Filtration area 60% 60% 60%, 100% 100%

In the case of other general technologies, only 60% of the filter area is used for filtration because the filtration is performed from the inside to the outside. However, in the case of the disk filter of the present invention, Since the driving level difference is large, it is easy to utilize 100% of the filtration area. Other techniques of the present invention are that the raw water is supplied through one pipe and the outside is filtered, and therefore, it is impossible to control each module, so that there is a disadvantage that all modules must be stopped in order to perform membrane replacement or backwashing do. However, in the present invention, the disk filter using the ion exchange fiber can utilize most of the filter area, and it is possible to provide a filter device for a sewage treatment which can be individually operated by a floating material removal technique utilizing an individual disk filter.

The present invention has been described above with reference to the embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. Therefore, the scope of the present invention is not limited to the above-described embodiments, but should be construed to include various embodiments within the scope of the claims and equivalents thereof.

10: sewage treatment
20: Disc filter
30: Outflow pipe
40: Washer

Claims (5)

Sewage tank containing sewage;
At least one disk filter including a filtering member for allowing the sewage in the sewage tank to be introduced and filtered inward;
An outlet tube connected to the disc filter for discharging the filtered water from the disc filter; And
And a cleaner for removing and discharging dirt adhering to both sides of the disk filter,
Wherein the filter member is composed of ion exchange fibers,
The ion-
An ion exchange fiber for removing arsenic (As)
Depending on the difference in quantitation level of the fiber according to the pH and the type of ionic species of the arsenic, the amine group of the free amine type in which the amine group is not bonded to the H + ion is protonated ) Type fiber, and the fiber having the functional group of the free amine form and the functional group of the biodegradable form being half of the fiber. delete The method according to claim 1,
Wherein a plurality of the disk filters are installed so as to be spaced apart from each other, and the outflow pipe is detachably connected to the plurality of disk filters. The method according to claim 1,
Wherein the cleaner includes a suction pipe that is rotatably attached to both surfaces of the disk filter, a driving unit that provides power for rotating the suction pipe, and a suction pump that provides a suction force to suck the dirt into the suction pipe. Filter device for sewage treatment. The method according to claim 1,
Wherein the disk filter is regenerated with an ion exchange function using a solution comprising at least one of NaCl and NaOH.

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