KR101877142B1 - Method for filtering of wastewater using an ion-exchange fiber - Google Patents

Abstract

A method of filtering sewage using ion exchange fibers is disclosed. According to another aspect of the present invention, there is provided a method of filtering sewage using ion exchange fibers, comprising: forming a filter layer comprising filter media including ion exchange fibers in a filter through which sewage flows; Filtering the sewage introduced into the filter using the filtration layer, and discharging the filtered sewage; And washing the filter media by applying reverse osmosis water for washing the filter media to the filter after a lapse of a predetermined time, wherein the ion exchange fiber is mixed with the first combustible fiber yarn at a ratio of 6: 4, Wherein the mixed fiber yarns are five-fold, and the mixed fiber yarns are superposed with the second combustible yarn yarns at a ratio of 1: 6 strands and thermally fused.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for filtering wastewater using an ion-

The present invention relates to the filtering of sewage, and more particularly, to an ion exchange filter for removing turbidity of water contaminated with contaminants and removing dissolved ions dissolved in contaminated water by ion- And a method of filtering sewage using fibers.

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

In general, a filter device for sewage treatment includes a filter for introducing sewage, a plurality of disk-shaped filters installed in the filter for filtering the sewage, and a high- And a washing machine installed in the washing machine. 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 filter is filtered while passing through the filter. 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 discharge port.

However, in this sewage treatment filter device, the sewage flows into the filter through the filter and is discharged to the outside, so that floating matters or dirt adhere to or accumulate 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. 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. That is, the conventional micro chip filter used in the sewage filtering method removes suspended solids dissolved in water to remove turbidity of contaminated water, but removes soluble ions dissolved in contaminated water There is no problem.

In order to solve the problems of the prior art described above, a solution to the problem of the prior art is to add ion exchange fibers having high ion exchange capacity, impurity adsorption ability, high strength, elasticity and stretchability to a microchip filter, And removing the dissolved ions dissolved in the contaminated water. The present invention also provides a method for filtering sewage using ion exchange fibers.

According to another aspect of the present invention, there is provided a method of filtering sewage using ion exchange fibers, comprising: forming a filter layer comprising filter media including ion exchange fibers in a filter through which sewage flows; Filtering the sewage introduced into the filter using the filtration layer, and discharging the filtered sewage; And washing the filter media by applying a reverse osmosis water for washing the filter media to the filter after a lapse of a predetermined time, wherein the ion exchange fiber is mixed with the first combustible fiber yarn at a density ratio of 6: 4, The mixed fiber yarn is five-fold, and the mixed fiber yarn is superposed with the second combustible fiber yarn at a ratio of 1: 6 strands and is thermally fused.

And adjusting the density of the filter media constituting the filtration layer according to the type of the sewage after the filtration layer is formed.

Further comprising the step of adjusting the density of the filter media constituting the filter layer to an initial density level after discharging the sewage, wherein the filter media adjusted to the initial density level is washed .

And filtering the sewage using the filtration layer is characterized by filtering suspended solids and dissolved substances contained in the sewage.

Wherein the ion exchange fiber is produced by a process comprising the steps of: mixing the ion exchange fiber with a first combustible fiber yarn and a second combustible fiber yarn; preparing nuclei using the fiber yarn thus fabricated; and thermally fusing the produced nucleus .

According to one embodiment of the present invention, not only suspended substances contained in sewage but also soluble ions dissolved in sewage can be removed. In addition, the sewage treatment process is simple, and the water pollution treatment cost is also reduced. In addition, the filter material of the present invention can be reused after backwashing by mixing dissolved ion desorbing water in the reverse water, and the treatment efficiency of the polluted water can be increased by changing the magnification of the filter material according to the characteristics of the discharged water.

1 is a flow chart of an embodiment for explaining a sewage filtering method using the ion exchange fiber according to the present invention.
FIG. 2 is a reference view illustrating an operation procedure of the filter for explaining the sewage filtering method shown in FIG. 1; FIG.
3 is a reference diagram illustrating an ion exchange fiber according to the present invention.
4 is a reference view illustrating a fiber yarn obtained by mixing the ion exchange fiber and the first combustible fiber yarn according to the present invention.
FIG. 5 is a reference drawing illustrating the nucleation and the cut nucleus of the mixed fiber yarn and the second combustible fiber yarn according to the present invention.
FIG. 6 is a reference view illustrating a finished filter material by thermally fusing the produced nucleus according to the present invention. FIG.

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 flow chart of an embodiment for explaining a sewage filtering method using ion exchange fibers according to the present invention. FIG. 2 is a flowchart illustrating a method of filtering sewage water according to an embodiment of the present invention. Fig.

First, a filter layer composed of filter media including ion exchange fibers is formed in a filter into which sewage flows (S100). As shown in FIG. 2 (a), filter media 210 containing ion exchange fibers may be disposed in layers in the filter 200. That is, the filter media 210 including the ion exchange fibers may be arranged at a certain density in the filter 200 to form a filtration layer for filtering sewage.

3 is a reference diagram illustrating an ion exchange fiber according to the present invention. Ion exchange fiber is a structure in which the polymer matrix inside the fiber maintains a high tensile strength and a high concentration of functional groups are implanted in the polymer matrix, Ion exchange capacity, stength, elasticity, and flexibility are much higher than that of the material.

The ion exchange fiber may be one produced by joining the first and second false-twist fibers to the ion exchange fiber, fabricating the nucleus by using the fiber yarn and thermally fusing the produced nucleus . The manufacturing process of the ion exchange fiber corresponding to the constituent elements of the filter media in the filter is as follows.

4 is a reference view showing a fiber yarn in which a first flammable fiber yarn is embedded in an ion exchange fiber according to the present invention.

The ion exchange fiber is formed by forming a solid or an ion in a liquid into a film by forming an ion exchange resin, which is a particle having a functional group that exchanges ions of the same sign existing in an aqueous solution, as a film.

Ion exchange fiber has high ion exchange ability, impurity adsorption ability, high strength and elasticity, good stretchability and can be reused, so it is made of flexible fiber yarn (polypropylene has high rigidity and has high heat resistance, water resistance, abrasion resistance) Ion exchange fiber can be used in the micro chip filter to remove the turbidity of the contaminated water and to remove the dissolved ions dissolved in the contaminated water to increase the treatment efficiency of the polluted water.

The ion exchange fiber and the first combustible fiber yarn are mixed at a density ratio of 6: 4. The mixed yarn wound may be equivalent to five yarns. The reason why the ion exchange fiber and the first flammable fiber yarn are mixed at a density ratio of 6: 4 is to prevent the manufacturing cost from being increased without losing the advantages of the above-mentioned ion exchange fiber and the flammable fiber yarn.

FIG. 5 is a reference view showing the nucleus and the cut nucleus formed by folding the mixed fiber yarn and the second combustible yarn as shown in FIG.

Referring to FIG. 5, the ratio of the number of strands of the mixed fiber yarn and the second combustible fiber yarn is 1: 6. In the present invention, twenty-two strands of mixed fiber yarns and two strands of second twisted fiber yarn are stranded. (Total nitrogen) and TP (total phosphorus) when the filter material was produced with 22 strands of mixed fiber yarn and 130 strands of second combustible fiber yarn (Sample 4 of Table 1 described later) L] was the best. The experimental data are shown in Table 1 and Table 2 below.

 T-N (total nitrogen) removal amount (initial concentration of T-N is 67 mg / L)


Sample 1
Sample 2
Sample 3
Sample 4
Sample 5
Removal rate [%]

82.90
82.10
84.46
74.04
82.03
Removal amount [mg / L]

55.70
55.17
56.75
49.75
55.12
The number of the second combustible fiber strands
92
92
60
130
100
Mixed fiber yarns
44
44
60
22
60

Knotted

One
3
3
3
2 Removal amount per mixed fiber yarn [mg / L]

1.27

1.25

0.95

2.26

0.92

 Removal amount of T-P (total phosphorus) (initial concentration of T-P is 155 mg / L)


Sample 1
Sample 2
Sample 3
Sample 4
Sample 5
Removal rate [%]

60.48
52.79
54.27
49.20
52.66
Removal amount [mg / L]

92.81
81.01
83.29
75.50
80.80
The number of the second combustible fiber strands
92
92
60
130
100
Mixed fiber yarns
44
44
60
22
60
Knotted

One
3
3
3
2 Removal amount per mixed fiber yarn [mg / L]

2.11

1.84

1.39

3.43

1.35

As shown in Tables 1 and 2, Sample 1 had a knot number of 1, a mixed fiber yarn number of 44, and a second number of twisted yarn strands of 92, each having a ratio of 1: 2, a sample 2 having a knot number of 3, The ratio of the number of the strands of the fiber 44 and the number of the strands of the second twisted fiber yarn 92 was 1: 2 respectively, the number of the knot 3, the number of the mixed yarns 60, 1: 1, sample 4 had a knot number of 3, a mixed fiber yarn number of 22, and a second number of twisted yarn strands of 130, each having a ratio of 1: 6, a sample 5 having a knot number of 2, 60, and the number of the second strand of combustible fibers is 100, and the ratio is 1: 1.6, respectively.

As can be seen from Tables 1 and 2, when the number of strands of the second twisted yarn 130 and the number of strands 22 of the mixed fiber yarn 22, that is, the number of strands of the mixed fiber yarn and the second twisted yarn were 1: 6 The removal amount of TN (total nitrogen) and TP (total phosphorus) per strand of mixed fiber was 2.26 [mg / L] and 3.43 [mg / L], respectively. Then, in order to improve the durability of the core by using the folded fiber yarn, the folded fiber yarn is bundled into three strands by using three strands of a third flexible yarn, Because the size is reduced, it can be cut to 3cm.

FIG. 6 is a reference view showing a finished filter material obtained by thermally fusing nuclei manufactured according to an embodiment of the present invention.

Referring to FIG. 6, in the step of thermally fusing nuclei, heat fusion can be performed at a temperature of 125 ° C to 135 ° C, a pressure of 2.5 to 3.5 kg / hr, and a time of 15 to 20 minutes. In the present invention, heat fusion can be performed at a temperature of 130 占 폚, a pressure of 3 kg / hr, and a time of 20 minutes so that the knot of the filter material in which the ion exchange fibers are joined is not loosened and the durability is maximized. The total diameter of the finally obtained finished ion-exchange fiber-loaded filter media is 2 cm and the density is 0.112 g / cm 3.

After step S100, the density of the filter media constituting the filter layer is adjusted according to the type of sewage (step S102). In order to control filtration efficiency and filter material density in the filter 200, a piston may be provided to apply a constant pressure to the inside. As shown in FIG. 2 (b), the compressed filter medium deep filtration method is a method in which after the filter media 210 is introduced into the filter 200, pressure is applied to the piston 220 provided in the filter 200, By compression, the density of the filter media 210 forming the filtration layer can be increased. As the density of the filter media 210 increases, the size of the pore of the filter layer decreases.

The density of the filter media 210 may be determined depending on the type of sewage. For example, when the pollution degree of the sewage is high, the filter medium density is increased, and when the pollution degree of the sewage is low, the filter medium density of the filter layer can be relatively lowered. Accordingly, if the filter material density of the filtration layer is increased, the filtration precision for sewage can be increased. However, in this case, the time for sewage filtering can be increased. Further, if the filter material density of the filtration layer is low, the filtering accuracy for sewage is reduced, but the time for sewage filtering can be reduced.

On the other hand, if the pollution degree of the sewage is low but more precise filtration is required, it is possible to increase the filter medium density of the filtration layer when the pollution degree of sewage is low, and also to lower the filter medium density of the filtration layer have. As described above, the compression rate of the filtration layer can be varied according to the kind of the sewage (for example, the concentration of the suspended material or the dissolved substance), and the filtration efficiency can be adjusted by controlling the density of the filter material by the variable compression ratio.

After step S102, the sewage introduced into the filter is filtered using the filter layer, and the filtered sewage is discharged (step S104). As shown in Fig. 2 (b), the sewage flows into the spaces between the pores of the filtration layer compressed by pressure and is filtered. The treated sewage, that is, the treated water, is discharged through the discharge passage disposed at the lower portion of the filter 200. Since the filtration layer has the filter media 210 including the ion exchange fiber, it is possible to filter not only the suspended material contained in the sewage but also the dissolved material. The time during which the filtration layer filters the sewage depends on the concentration of suspended solids and dissolved substances, and can be performed, for example, within a range of 2 to 10 hours.

After step S104, after the filtration process is completed, the density of the filter media constituting the filtration layer is adjusted to an initial density level (step S106). That is, it is a process for adjusting the size of the gap, that is, the pore size, of the filter media 210 constituting the filtration layer in order to carry out the reverse seawater injection process to be described later. As shown in FIG. 2 (c), when the sewage inlet pressure reaches a predetermined pressure, filtration is stopped and the piston 220 is moved to the top of the filter 200 to restore the compression rate of the filtration layer to its original level . As the pressure of the piston applied to the filtration layer is released, the density of the media in which the filtration layer has been formed is lowered, thus increasing the pore size of the filtration layer.

After step S106, reverse water for washing the filter media is applied to the filter to clean the filter media (step S108). The filter media is washed by applying reverse water into a filter having a filter layer with a lower density of filter media. As shown in FIG. 2 (d), when the piston 220 compressing the filtration layer moves upward, the pore size of the filtration layer increases. That is, the spacing between the filter media 210 forming the filtration layer is increased. Accordingly, when the reverse water and the air for washing the filter media 210 are applied in the filter 200, the suspended substances and dissolved substances attached to the filter media 210 by the applied reverse osmosis water and air are stirred and vibrated . Thereafter, the backwash water flows out of the filter 200 (that is, backwash water backward), and the backwash process is performed to remove the suspended substances and dissolved substances dissolved in the backwash water.

The sewage filtering method using the ion exchange fiber according to the present invention can be applied to any type of filtering apparatus including various types of compression methods and filtration methods including a compressed filter medium deep filtration apparatus, , And water pollution treatment costs can be reduced. In addition, it is possible to reuse the filter material of the present invention after backwashing by mixing dissolved ion desorbing water in reverse water, and it is possible to change the magnification of the filter material of the present invention depending on the characteristics of the discharged water, .

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.

Claims (5)

Forming a filter layer composed of filter media including ion exchange fibers in a filter through which sewage flows;
Filtering the dissolved material including total nitrogen and total phosphorus together with suspended solids in the wastewater introduced into the filter using the filtration layer, and discharging the filtered sewage; And
And washing the filter media by applying a reverse osmosis water for washing the filter media to the filter after a lapse of a predetermined time,
Each of the above-
The ion-exchange fiber and the first combustible fiber yarn are mixed at a density ratio of 6: 4 to form a mixed fiber yarn of five numbers. The mixed fiber yarn comprises a second combustible fiber yarn for rigidity, heat resistance, water resistance and abrasion resistance, : 6 strands, and the fiber yarn thus fabricated is made into a core and thermally fused at a temperature of 130 캜, a pressure of 3 kg / hr, and a time of 20 minutes. . The method according to claim 1,
Further comprising the step of adjusting the density of the filter media constituting the filtration layer according to the type of the sewage after the filtration layer is formed. The method of claim 2,
Further comprising the step of adjusting the density of the filter media constituting the filter layer to an initial density level after discharging the sewage,
Wherein the filter media is washed by applying the reverse water wash to the filter media adjusted to an initial density level.

delete delete

Images