KR101791307B1 - Apparatus for purifying water and method for purifying water using the same - Google Patents

Apparatus for purifying water and method for purifying water using the same Download PDF

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Publication number
KR101791307B1
KR101791307B1 KR1020150135941A KR20150135941A KR101791307B1 KR 101791307 B1 KR101791307 B1 KR 101791307B1 KR 1020150135941 A KR1020150135941 A KR 1020150135941A KR 20150135941 A KR20150135941 A KR 20150135941A KR 101791307 B1 KR101791307 B1 KR 101791307B1
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South Korea
Prior art keywords
water
pipe
treated water
filtration
membrane
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KR1020150135941A
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Korean (ko)
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KR20170036576A (en
Inventor
최양훈
이상중
김경희
구영림
민규홍
Original Assignee
롯데케미칼 주식회사
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Priority to KR1020150135941A priority Critical patent/KR101791307B1/en
Publication of KR20170036576A publication Critical patent/KR20170036576A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0079—Manufacture of membranes comprising organic and inorganic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/20—Total organic carbon [TOC]

Abstract

The water treatment apparatus of the present invention comprises: a first filtering unit for filtering raw water and discharging first treated water and first concentrated water; A second filtration unit for filtrating the introduced first treated water to discharge the second treated water and the second concentrated water; And a graining oxide contact portion for filtering the introduced first concentrated water and the second concentrated water by a filtration member to produce a third treated water, wherein the third treated water is passed through the sixth pipe through the sixth pipe 1 filtration unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus,

The present invention relates to a water treatment apparatus and a water treatment method using the water treatment apparatus.

Recently, interest in water scarcity has been increasing, and research on the water treatment method of purifying and reusing water has been actively carried out. Among them, the membrane filtration process is evaluated to be suitable as a water treatment method. However, due to the characteristics of the membrane filtration process, the concentrated water generated in the process is discharged, resulting in a problem that the recovery rate of the entire process is lowered.

As a technique that can increase the recovery rate, the concentrated water is recycled to the raw water. In this case, as the recycled water volume increases, the concentration of the contaminant in the concentrated water increases, There is a problem. There are various methods to solve this problem, but the proposed processes have a complicated process and high design cost through various unit processes.

Therefore, there is a need for a water treatment method that can increase the recovery rate while the process is simple.

An object of the present invention is to provide a water treatment apparatus capable of recovering the entire amount of concentrated water and a water treatment method using the same.

Another object of the present invention is to provide a water treatment apparatus having an excellent level of concentrated water treatment and a concentrated water recovery process, and a water treatment method using the same.

The above and other objects of the present invention can be achieved by the present invention described below.

A water treatment apparatus, which is one aspect of the present invention, includes a first filtering unit for filtering raw water and discharging first treated water and first concentrated water; A second filtration unit for filtrating the introduced first treated water to discharge the second treated water and the second concentrated water; And a graining oxide contact portion for filtering the introduced first concentrated water and the second concentrated water by a filtration member to produce a third treated water, wherein the third treated water is passed through the sixth pipe through the sixth pipe 1 filtration unit.

The filter member may comprise oxidized graphene particles.

The first filtration unit may include a microfiltration membrane or an ultrafiltration membrane.

The second filtration unit may include a nanofiltration membrane or a reverse osmosis membrane.

Wherein the first filtration part or the second filtration part is provided with a filtration membrane, and the material of the filtration membrane is an inorganic membrane including at least one of a ceramic and a metal membrane; And polypropylene (PP), polyamide (PA), polyethylene (PE), polyvinylidene difluoride (PVDF), polysulfone (PS), polytetrafluoroethylene (PTFE), polyacrylonitrile And an organic film comprising at least one of cellulose acetate and cellulose acetate.

The first filtration part or the second filtration part is provided with a filtration membrane, and the filtration membrane may be a tubular membrane, a flat membrane, a bainted membrane or a hollow fiber membrane.

A measuring device for measuring at least one of total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water may be provided on the sixth pipe.

The water treatment apparatus may not discharge the concentrated water.

The water treatment apparatus is characterized in that the raw water is introduced into the first filtration section through a first pipe, the first treated water flows into the second filtration section through a second pipeline, and the second treatment produced from the second filtration section Water is discharged through the third pipe, the first concentrated water flows into the oxidized graphene contact portion through the fourth pipe, and the second concentrated water flows into the oxidized graphene contact portion through the fifth pipe .

And a seventh pipe for introducing the third treated water into the second filtering unit.

The seventh pipe may be branched from the sixth pipe.

The first treated water may flow into the second filtration part through the second pipe, and the seventh pipe may be connected with the second pipe to merge.

The first concentrated water flows into the oxidized graphene contact portion through the fourth pipe, the second concentrated water flows into the oxidized graphene contact portion through the fifth pipe, and the fourth pipe flows through the fifth pipe And to join together.

The raw water may be introduced into the first filtration unit through a first pipe, and the sixth pipe may be connected to a first pipe to join the first pipe.

In another aspect of the present invention, a water treatment method includes filtering crude water to produce a first treated water and separating a first concentrated water; Filtering the first treated water to produce a second treated water and separating the second concentrated water; Filtering the first concentrated water or the second concentrated water at a contact portion of oxidized graphene to produce a third treated water; And joining the third treated water to the raw water. The water treatment method using the water treatment apparatus may further include:

The step of joining the third treated water to the raw water may include measuring at least one of total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water.

The step of joining the third treated water to the raw water may be a step of joining the third treated water to the raw water or the first treated water.

The present invention has the effect of providing a water treatment apparatus capable of recovering the entire amount of concentrated water, having a high level of concentrated water treatment, simplifying the concentrated water recovery process, and a water treatment method using the same.

1 is a conceptual view schematically showing a water treatment apparatus according to one embodiment of the present invention.
2 is a conceptual diagram schematically showing a water treatment apparatus according to another embodiment of the present invention.
3 is a conceptual diagram schematically showing a water treatment apparatus according to another embodiment of the present invention.
4 is a conceptual view schematically showing a contact portion of an oxidized graphene according to an embodiment of the present invention.

Embodiments of the present application will now be described in more detail with reference to the accompanying drawings. However, the techniques disclosed in this application are not limited to the embodiments described herein but may be embodied in other forms. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the width, thickness, and the like of the components are enlarged in order to clearly illustrate the components of each device. In addition, although only a part of the components is shown for convenience of explanation, those skilled in the art can easily grasp the rest of the components. It is to be understood that when an element is described above as being located above or below another element, it is to be understood that the element may be directly on or under another element, It means that it can be done. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. In the drawings, the same reference numerals denote substantially the same elements.

In the present specification, "treated" means that the fluid introduced into the filtration unit permeates the filtration membrane.

In the present specification, the term "treated water" means a portion of the fluid introduced into the filtration portion through the filtration membrane.

The term " discharge " in this specification means to finally discharge the fluid out of the system.

Hereinafter, a water treatment apparatus according to one embodiment of the present invention will be described with reference to FIG. 1 is a conceptual view schematically showing a water treatment apparatus according to one embodiment of the present invention.

Referring to FIG. 1, a water treatment apparatus according to an embodiment of the present invention includes a first filtration unit 10 for filtering raw water and discharging first treated water and first concentrated water; A second filtration unit 30 for filtering the introduced first treated water and discharging the second treated water and the second concentrated water; And an oxidizing graphene contacting portion (50) for filtering the introduced first concentrated water and the second concentrated water by a filtration member to produce a third treated water, wherein the third treated water is passed through a sixth pipe L6 through the first filtration unit.

The water treatment apparatus may further include a first pipe L1 through which the raw water flows into the first filtration unit 10, a second filtration unit 30 through the first filtration unit 10, A third pipe L3 for discharging the second treated water from the second filtration part 30 and a third pipe L3 for discharging the first treated water from the first filtration part 10 to the oxidized graphene contact part A fifth pipe L5 for discharging the second concentrated water to the oxide graphene contact portion 50 in the second filtering portion 30 and a fifth pipe L5 for discharging the second concentrated water to the oxide graphene contacting portion 50, A sixth pipe L6 for discharging the third treated water from the contact portion 50 to the first filtering portion 10 can be formed.

Specifically, the raw water flows into the first filtration unit 10 through the first pipe L1 and the first treated water flows into the second filtration unit 30 through the second pipe L2 The second treated water produced from the second filtration unit 30 is discharged through the third pipe L3 and the first concentrated water is discharged through the fourth pipe L4 to the oxidized graphene contact unit 50, And the second concentrated water may flow into the oxidized graphene contact portion 50 through the fifth pipe L5.

The first filtration unit 10 performs filtration to remove particulate matter and contaminants in the raw water. Specifically, the first filtration unit 10 filters the raw water flowing through the first pipe L1 and discharges the first treated water and the first concentrated water. The first treated water flows into the second filtration part 30 through the second pipe L2 for filtration in the second filtration part 30. The first concentrated water flows through the fourth pipe Lt; RTI ID = 0.0 > 50 < / RTI >

The first filtration unit 10 may include a microfiltration membrane or an ultrafiltration membrane. The material and form of the filtration membrane are not particularly limited and may be those conventionally used. In addition, the first filtration section 10 can be both pressurized or immersed.

For example, the material of the filtration film is an inorganic film including at least one of ceramic and metal film; And polypropylene (PP), polyamide (PA), polyethylene (PE), polyvinylidene difluoride (PVDF), polysulfone (PS), polytetrafluoroethylene (PTFE), polyacrylonitrile An organic film comprising at least one of cellulose acetate and cellulose acetate; But is not limited thereto. The first filtering unit 10 may be a tubular membrane, a flattened membrane, a bainted membrane, or a hollow fiber membrane. However, the present invention is not limited thereto.

The second filtration unit 30 performs filtration to remove taste or odor inducing substances, ionic substances, divalent ion substances, viruses, organic substances, heavy metals, medicinal substances and environmental hormones. Specifically, the second filtration unit 30 filters the first treated water flowing from the first filtration unit 10 through the second pipe L2 to discharge the second treated water and the second concentrated water. The second treated water is discharged through the third pipe L3 and the second concentrated water flows into the oxidized graphene contact portion 50 through the fifth pipe L5 for recovery.

The second filter 30 may be a nanofiltration membrane or a reverse osmosis membrane. The material and form of the filtration membrane are not particularly limited and may be those conventionally used. This is substantially the same as that described in the first filtration section 10. In addition, the first filtration section 10 can be both pressurized or immersed.

The oxidized graphene contact 50 will now be described with reference to FIG. 4 is a conceptual view schematically showing a contact portion of an oxidized graphene according to an embodiment of the present invention.

The oxidized graphene contact portion 50 filters all of the introduced first concentrated water and the second concentrated water with a filtration member to produce a third treated water. The third treated water flows into the first filtration unit 10 through the sixth pipe, and the recovery rate can be remarkably increased. Specifically, the oxidized graphene contact portion 50 does not produce concentrated water and does not discharge the concentrated water.

In addition, by applying the graphene oxide contact portion 50, the first and second concentrated water flowing in from the first filtration portion 10 or the second filtration portion 30 can be prevented from being discharged, and the recovery rate of the water treatment apparatus can be remarkably improved . Specifically, the water treatment apparatus may not discharge the concentrated water.

The filtering member may use graphene oxide. Oxidized graphene not only removes traces of organic materials, inorganic substances, heavy metals, etc., but also removes aliphatic organic compounds due to hydrophobic interactions. The oxidized graphene contact portion 50 comprising oxidized graphene is excellent in filtration efficiency and does not deteriorate the performance of the membrane even though the concentrated water is recovered and reused.

In one embodiment, the filtration member may comprise oxidized graphene particles. The graphene oxide grains may have an average particle size of 10 nm to 180 nm, specifically 50 nm to 180 nm, more specifically 80 nm to 120 nm. In the above range, the graphene oxide grains are easy to handle and have an excellent filtration efficiency.

The oxidized graphene contact 50 may comprise the filter element in the vessel to facilitate replacement. For example, the container may be a PVC pipe or the like, but is not limited thereto. Specifically, the oxidized graphene contact portion 50 may be filled with graphene oxide particles in the container, and one or more of the fourth pipe, the fifth pipe, the sixth pipe, and the seventh pipe may be connected. In FIG. 4, the fifth pipe and the sixth pipe are shown as coupled, but the present invention is not limited thereto. Specifically, the fourth pipe may join the fifth pipe, and the seventh pipe may be branched from the sixth pipe. Or the fourth pipe, the fifth pipe, the sixth pipe, and the seventh pipe may be all connected to the oxide graphene contact portion 50.

As shown in FIG. 4 (a), the pipe introduced into the oxidized graphene contact portion 50 may be formed higher than the pipe through which the treated water is discharged from the oxidized graphene contact portion 50, but the present invention is not limited thereto. Specifically, as shown in FIG. 4 (b), the pipe that flows into the oxidized graphene contact portion 50 may be formed lower than the pipe through which the treated water is discharged from the oxidized graphene contacting portion 50.

The oxide graphene contact portion 50 is filled with a filtering member, and the porosity of the oxide graphene contact portion 50 may be 50 to 90%, specifically 70 to 80%. In the above range, the balance between the flow of the fluid and the filtration efficiency is excellent.

In FIG. 1, the fourth pipe L4 is connected to the fifth pipe L5, but is not limited thereto. For example, the fourth pipe L4 may introduce the first or second concentrated water into the oxide graphene contact portion 50 independently of the fifth pipe L5. In FIG. 1, the sixth pipe L6 is connected to the first pipe L1 and joined together. However, the sixth pipe L6 is not limited thereto. For example, the sixth pipe L6 may flow the third treated water or the raw water into the first filtering unit 10 independently of the first pipe L1.

Although not shown in FIG. 1, a raw water tank may be provided before the first pipe L1, and a storage tank for storing the third treated water after the third pipe L3.

Hereinafter, a water treatment apparatus according to another embodiment of the present invention will be described with reference to FIG. 2 is a conceptual diagram schematically showing a water treatment apparatus according to another embodiment of the present invention.

Referring to FIG. 2, the water treatment apparatus according to another embodiment of the present invention further includes, on the sixth pipe L6, one of total dissolved solids (TDS) of the third treated water and total dissolved organic carbon (TOC) A measuring device 70 may be provided. Specifically, the measuring device 70 measures at least one of the total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water to predict the replacement timing of the oxidized graphene contact portion 50 . The measuring apparatus 70 may further include a display unit for displaying at least one of total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water, but the present invention is not limited thereto.

Hereinafter, a water treatment apparatus according to another embodiment of the present invention will be described with reference to FIG. 3 is a conceptual diagram schematically showing a water treatment apparatus according to another embodiment of the present invention.

Referring to FIG. 3, the water treatment apparatus according to another embodiment of the present invention may further include a seventh pipe L7 for introducing the third treated water into the second filtering unit 30. Specifically, the seventh pipe L7 may be further included and may be introduced into the first filtering unit 10 or the second filtering unit 30 depending on the degree of contamination of the third treated water.

In the water treatment apparatus according to another embodiment, the third process water produced in the oxide graphene contact unit 50 can be introduced into the first filtration unit 10 or the second filtration unit 30, and the second filtration unit 30 Is provided with a water treatment apparatus according to one embodiment of the present invention except for filtering the first treated water flowing in from the first filtration unit 10 and the third treated water flowing in from the oxidized graphene contact well 50 Substantially the same.

In FIG. 3, the seventh pipe L7 is illustrated as branched from the sixth pipe L6, but the present invention is not limited thereto. For example, the seventh pipe L7 may be formed independently of the sixth pipe L6. In FIG. 3, the seventh pipe L7 is connected to the second pipe L2, but is not limited thereto. For example, the seventh pipe L7 may be formed independently of the second pipe L2.

In another aspect of the present invention, a water treatment method includes filtering crude water to produce a first treated water and separating a first concentrated water; Filtering the first treated water to produce a second treated water and separating the second concentrated water; Filtering the first concentrated water or the second concentrated water at a contact portion of oxidized graphene to produce a third treated water; And joining the third treated water to the raw water.

The step of filtering the raw water to produce the first treated water and the step of separating the first concentrated water may be performed by the first filtering unit. The step of filtering the first treated water to produce the second treated water and the step of separating the second concentrated water may be performed by the second filtering unit. The second treated water may be stored in a storage tank.

The filtration in the step of producing the third treated water by filtering the first concentrated water or the second concentrated water at the contact portion of the oxidized graphene is excellent in the filtration efficiency and the performance of the membrane is recovered even though the concentrated water is recovered and reused It may not drop.

By performing the step of joining the third treated water to the raw water, the recovery rate of the filtration membrane water treatment is remarkably increased. Specifically, the water treatment method may not produce the concentrated water, and may not discharge the concentrated water.

The step of introducing the third treated water into the raw water may include measuring at least one of total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water. By measuring at least one of the total dissolved solids (TDS) and the total dissolved organic carbon (TOC) of the tertiary treatment water, the water treatment system can be efficiently managed by predicting the replacement timing of the oxidized graphene contact part 50 There are advantages to be able to.

The step of joining the third treated water to the raw water may be a step of joining the third treated water to the raw water or the first treated water. Specifically, there is an advantage that the water treatment efficiency can be increased by introducing the third treated water into the first filtering section or the second filtering section in accordance with the degree of contamination of the third treated water.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is to be understood, therefore, that the embodiments described above are intended to be illustrative in all respects and not restrictive.

L10: first filtration part, 30: second filtration part, 50: oxidative graphene contact part, 70: measuring device for measuring at least one of TDS and TOC, L1: first piping, L2: second piping, L3: 3 pipe, L4: fourth pipe, L5: fifth pipe, L6: sixth pipe, L7: seventh pipe

Claims (17)

A first filtration unit for filtering the introduced raw water to discharge the first treated water and the first concentrated water;
A second filtration unit for filtrating the introduced first treated water to discharge the second treated water and the second concentrated water; And
An oxidized graphene contact portion for filtering the introduced first concentrated water and the second concentrated water by a filtration member to produce a third treated water;
Lt; / RTI >
Wherein the graphene oxide contacts comprise the filter member in a vessel, the filter member comprises graphene grains,
The graphene oxide grains have an average particle diameter of 10 nm to 180 nm,
Wherein the graphene oxide contact portion has an internal porosity of 50% to 90%
And the third treated water flows into the first filtering unit through a sixth pipe,
Wherein the water treatment apparatus does not discharge the concentrated water.
delete The water treatment system according to claim 1, wherein the first filtration unit is provided with a microfiltration membrane or an ultrafiltration membrane.
The water treatment system according to claim 1, wherein the second filtration part comprises a nanofiltration membrane or a reverse osmosis membrane.
[2] The filter according to claim 1, wherein the first filtration part or the second filtration part is provided with a filtration membrane,
An inorganic film including at least one of a ceramic film and a metal film; And
(PP), polyamide (PA), polyethylene (PE), polyvinylidene difluoride (PVDF), polysulfone (PS), polytetrafluoroethylene (PTFE), polyacrylonitrile An organic film comprising at least one of acetate;
≪ / RTI >
The water treatment system according to claim 1, wherein the first filtration unit or the second filtration unit is provided with a filtration membrane, and the filtration membrane is in the form of a tubular membrane, a flat plate membrane, a bare membrane membrane or a hollow fiber membrane.
The water treatment system according to claim 1, wherein a measuring device for measuring at least one of total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water is provided on the sixth pipe.
delete The method according to claim 1,
The raw water flows into the first filtration unit through the first pipe,
The first treated water flows into the second filtering unit through the second pipe,
The second treated water produced from the second filtering unit is discharged through the third pipe,
The first concentrated water flows into the oxidized graphene contact portion through the fourth pipe,
And the second concentrated water flows into the oxidized graphene contact portion through a fifth pipe.
The water treatment system according to claim 1, further comprising a seventh pipe for introducing the third treated water into the second filtration unit.
11. The water treatment system according to claim 10, wherein the seventh pipe is branched from the sixth pipe.
11. The water treatment system according to claim 10, wherein the first treated water flows into the second filtration part through a second pipe, and the seventh pipe connects with and joins with the second pipe.
The method of claim 1, wherein the first concentrated water flows into the oxidized graphene contact through a fourth pipe,
The second concentrated water flows into the oxidized graphene contact portion through a fifth pipe,
And the fourth pipe is connected to the fifth pipe to merge.
The method as claimed in claim 1, wherein the raw water is introduced into the first filtration unit through a first pipe,
And the sixth pipe is connected to the first pipe to merge.
Filtering the raw water to produce a first treated water and separating the first concentrated water;
Filtering the first treated water to produce a second treated water and separating the second concentrated water;
Filtering the first concentrated water or the second concentrated water at a contact portion of oxidized graphene to produce a third treated water; And
Joining the third treated water to the raw water;
The water treatment method using the water treatment apparatus according to any one of claims 1, 3 to 7, and 9 to 14,
16. The method of claim 15, wherein joining the third treated water to raw water comprises measuring at least one of total dissolved solids (TDS) and total dissolved organic carbon (TOC) of the third treated water And water.
17. The water treatment method according to claim 16, wherein joining the third treated water to the raw water is a step of joining the third treated water to the raw water or the first treated water.

KR1020150135941A 2015-09-24 2015-09-24 Apparatus for purifying water and method for purifying water using the same KR101791307B1 (en)

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