KR20200081051A - Water treatment system and method for reuse of waste water and seawater desalination - Google Patents

Water treatment system and method for reuse of waste water and seawater desalination Download PDF

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KR20200081051A
KR20200081051A KR1020180171143A KR20180171143A KR20200081051A KR 20200081051 A KR20200081051 A KR 20200081051A KR 1020180171143 A KR1020180171143 A KR 1020180171143A KR 20180171143 A KR20180171143 A KR 20180171143A KR 20200081051 A KR20200081051 A KR 20200081051A
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water
raw water
seawater
forward osmosis
osmosis treatment
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KR102175647B1 (en
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장암
임승주
이현국
정상현
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성균관대학교산학협력단
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    • C—CHEMISTRY; METALLURGY
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    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/002—Forward osmosis or direct osmosis
    • B01D61/0021—Forward osmosis or direct osmosis comprising multiple forward osmosis steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/58—Multistep processes
    • 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
    • B01D63/02—Hollow fibre modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • 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
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • 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
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    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors
    • C02F3/2893—Particular arrangements for anaerobic reactors with biogas recycling
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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Abstract

Disclosed are a water treatment system for sewage reuse and seawater desalination, in which raw water is concentrated to produce methane gas and the purified raw water is diluted by seawater to be used for desalination so that a reuse ratio of the sewage is increased and a method thereof. According to the present invention, the water treatment system comprises: a first normal osmotic processing unit to receive raw water and seawater; a second normal osmotic processing unit receiving the raw water and the seawater from the first normal osmotic processing unit; an anaerobic processing unit receiving the raw water concentrated in the second normal osmotic processing unit and producing methane gas from the concentrated raw water; and a reverse osmotic processing unit receiving the seawater diluted in the second normal osmotic processing unit, separating the seawater into processed water and concentrated water, and discharging the same.

Description

하수 재이용과 해수 담수화를 위한 수처리 시스템 및 그 방법{WATER TREATMENT SYSTEM AND METHOD FOR REUSE OF WASTE WATER AND SEAWATER DESALINATION}WATER TREATMENT SYSTEM AND METHOD FOR REUSE OF WASTE WATER AND SEAWATER DESALINATION}

본 발명은 하수 재이용과 해수 담수화를 위한 수처리 시스템 및 그 방법에 관한 것으로서, 더욱 상세하게는 원수를 농축시켜 메탄가스를 생산하고, 정화된 원수를 해수에 희석시켜 담수화를 위한 용도로 사용함으로써, 하수의 재이용률을 향상시키는 하수 재이용과 해수 담수화를 위한 수처리 공정 시스템 및 그 방법에 관한 것이다.The present invention relates to a water treatment system and a method for reuse of sewage and desalination of seawater, and more specifically, to produce methane gas by concentrating raw water, and diluting purified raw water into seawater for use in desalination, The present invention relates to a water treatment process system and method for sewage reuse and seawater desalination to improve the reuse rate.

일반적으로, 물은 인간이 생존하고 생활을 영위하는 데 반드시 필요한 인자 중 하나이다. 그러나 현재 우리나라는 물론 전세계적으로 물이 부족한 실정에 있고, 이러한 물 부족 문제를 해결하기 위하여 다양한 물 재이용 방안이 다양하게 제시되고 있다.In general, water is one of the essential factors for human survival and life. However, at present, there is a shortage of water in the world as well as in Korea, and various water reuse methods have been proposed to solve the water shortage problem.

특히, 우수를 재이용하는 것은 인류가 아주 오래전부터 행하여 오던 것이고, 지금도 일부 나라에서는 일상생활에서 우수를 재이용하는 것을 확인할 수 있다. 집수한 우수를 적절히 처리하면 용수로 재이용할 수 있지만, 우리나라는 계절별 강우량 차이가 커서 우수 집수에 어려움이 있어 우수의 효과적인 대책 제시가 부족한 상태이다. In particular, reuse of excellence has been practiced by mankind for a long time, and it can be seen that excellence is reused in everyday life even in some countries. If the collected rainwater is properly disposed of, it can be reused as water, but in Korea, there is a difficulty in collecting rainwater due to the large difference in the amount of rainfall in each season.

한편, 도서 지역의 경우 물 부족 현상이 현저하고 원활한 물 공급을 위한 대책이 필요하다. 일 예로, 도서지역에 설치되는 해수 담수화시설은 하루 생산량 1천톤 이하의 소규모 시설이고 대부분 시장규모가 미미한 수준이다. On the other hand, in island regions, water shortage is remarkable and measures for smooth water supply are needed. For example, seawater desalination facilities installed in island areas are small facilities with a production capacity of less than 1,000 tons per day, and most of them have little market size.

또한, 기존의 담수화 설비는 고농도의 농축수의 배출로 인하여 수질오염 및 수온상승으로 해양 환경에 부정적 영향을 미치고, 도서 지역과 같이 제한된 에너지 및 수자원이 있는 지역에서 단순한 수처리(담수화) 뿐만 아니라 에너지 효율도 고려한 복합 처리 시스템이 부족한 실정이다.In addition, existing desalination facilities have a negative effect on the marine environment due to water pollution and rising water temperature due to the discharge of high concentration of concentrated water, and energy efficiency as well as simple water treatment (desalination) in areas with limited energy and water resources, such as island areas The complex processing system considered also is insufficient.

이와 같이 수자원이 부족한 도서지역에서는 그의 지리적 특성으로 인해 물의 원활한 공급과 운용에 대한 대책이 필요하고, 특히 에너지 및 수처리 효율적 측면에서 복합적으로 고려되는 담수화 운용 시스템의 요구 및 다른 수자원과 연계하여 운용되도록 하는 대안이 시급하다.In such island regions where water resources are insufficient, measures for smooth supply and operation of water are necessary due to its geographical characteristics, and in particular, it is necessary to operate in connection with other water resources and the demand for a desalination operation system that is considered in complex in terms of energy and water treatment efficiency. Alternatives are urgent.

따라서, 이를 개선할 필요성이 요청된다.Therefore, there is a need to improve this.

관련 배경기술로는 대한민국 등록특허공보 제10-1394237호(2014.05.07. 등록, 명칭: 다중수원 유입수 및 해수 유도용액을 이용한 해수담수화를 위한 삼투막 공정제어 시스템 및 그 방법)가 있다.As a related background technology, there is Korean Patent Registration No. 10-1394237 (2014.05.07. Registration, name: osmotic membrane process control system and method for desalination of seawater using multi-water influent and seawater inducing solution).

본 발명은 상기와 같은 필요성에 의해 창출된 것으로서, 원수를 농축시켜 메탄가스를 생산하고, 정화된 원수를 해수에 희석시켜 담수화를 위한 용도로 사용함으로써, 하수의 재이용률을 향상시키는 하수 재이용과 해수 담수화를 위한 수처리 공정 시스템 및 그 방법을 제공하는데 그 목적이 있다.The present invention was created by the necessity as described above, by concentrating raw water to produce methane gas, diluting purified raw water into sea water and using it as a purpose for desalination, reusing sewage and seawater to improve the reuse rate of sewage. The objective is to provide a water treatment process system and method for desalination.

상기한 목적을 달성하기 위하여 본 발명의 일 실시예에 따른 하수 재이용과 해수 담수화를 위한 수처리 시스템은 원수와 해수를 공급받는 제1정삼투처리부와, 상기 제1정삼투처리부에서 원수와 해수를 공급받는 제2정삼투압처리부와, 상기 제2정삼투처리부에서 농축된 원수를 공급받고, 농축된 원수에서 메탄가스를 생산하는 혐기성처리부 및 상기 제2정삼투처리부에서 희석된 해수를 공급받고, 해수를 처리수와 농축수로 분리 배출하는 역삼투처리부를 포함하는 것을 특징으로 한다.In order to achieve the above object, a water treatment system for reuse of sewage and desalination of seawater according to an embodiment of the present invention is supplied with raw water and seawater from a first forward osmosis treatment unit receiving raw water and seawater, and from the first forward osmosis treatment unit. The second positive osmosis treatment unit receives the supplied raw water concentrated from the second positive osmosis treatment unit, the anaerobic treatment unit producing methane gas from the concentrated raw water, and the diluted seawater supplied from the second positive osmosis treatment unit. It characterized in that it comprises a reverse osmosis treatment to separate and discharge the treated water and concentrated water.

상기 제2정삼투처리부는 원수에 잠긴 상태로 해수를 공급받고, 공급된 해수에 정화된 원수가 유입되도록 안내하여 원수를 농축시키는 중공사분리막부재 및 상기 중공사분리막부재가 원수를 농축시 상기 중공사분리막부재의 표면 오염층을 세척 가능하게 원수를 농축시키는 오염세척농축부를 구비할 수 있다.The second positive osmosis treatment unit receives the seawater while being submerged in the raw water, and guides the purified raw water to flow into the supplied seawater, and the hollow fiber separation membrane member and the hollow fiber separation membrane member concentrate the raw water when the raw water is concentrated. It is possible to have a contaminating washing and concentrating unit for concentrating the raw water so that the surface contaminating layer of the yarn separation membrane member is washable.

상기 오염세척농축부는 상기 중공사분리막부재의 표면에 접촉시 오염 물질을 제거하고, 원수를 농축 가능하게 분해하도록 원수에 부유하는 비즈 및 상기 비즈가 상기 중공사분리막부재의 표면에 접촉 가능하게 순환되도록 원수에 공기를 주입하는 공기주입부를 포함한다.The contaminant washing and concentrating unit removes contaminants upon contact with the surface of the hollow fiber separation membrane member, and the beads floating in the raw water and the beads are circulated so as to be able to contact the surface of the hollow fiber separation membrane member so as to decompose the raw water so as to be concentrated. It includes an air injection unit for injecting air into the raw water.

상기 비즈는 알긴산나트륨과 호기성 미생물을 혼합하여 제조될 수 있다.The beads can be prepared by mixing sodium alginate and aerobic microorganisms.

상기한 목적을 달성하기 위하여 본 발명의 일 실시예에 따른 하수 재이용과 해수 담수화를 위한 수처리 방법은 원수와 해수를 공급하는 공급단계와, 상기 공급단계에서 원수와 해수를 공급받아 정삼투 처리하는 제1정삼투처리단계와, 상기 제1정삼투처리단계에서 원수와 해수를 공급받아 정삼투 처리하는 제2정삼투처리단계 및 상기 제2정삼투처리단계에서 농축된 원수와 희석된 해수를 공급받아 원수에서 메탄가스를 생산하고, 희석된 해수에서 처리수를 생산하는 생산단계를 포함하는 것을 특징으로 한다.In order to achieve the above object, a water treatment method for reuse of sewage and desalination of seawater according to an embodiment of the present invention includes a supply step of supplying raw water and seawater, and a forward osmosis treatment receiving raw water and seawater in the supply step. In the 1st forward osmosis treatment step, the 2nd forward osmosis treatment step in which the raw water and seawater are supplied in the first forward osmosis treatment step, and the concentrated forward water and the diluted seawater in the second forward osmosis treatment step are supplied. Characterized in that it comprises a production step of producing methane gas from raw water and producing treated water from diluted seawater.

상기 제2정삼투처리단계는 중공사분리막부재를 통해 해수와 원수를 구획한 상태에서 해수에 정화된 원수를 유입시키는 삼투단계 및 비즈를 이용하여 원수의 유기물을 호기성 분해하여 원수를 농축시키는 호기성분해단계를 포함한다.The second positive osmosis treatment step is an aerobic decomposition that concentrates the raw water by aerobic decomposition of the organic material of the raw water by using an osmosis step and beads for introducing purified raw water into the sea water in a state in which sea water and raw water are partitioned through a hollow fiber membrane member. Steps.

상기 제2정삼투처리단계는 상기 제1정삼투처리단계에서 공급된 원수에 부상하는 오염 물질을 수거하는 오염물질 수거단계를 더 포함한다.The second forward osmosis treatment step further includes a pollutant collection step of collecting pollutants floating on the raw water supplied in the first forward osmosis treatment step.

상기 생산단계는 상기 제2정삼투처리단계에서 농축된 원수를 공급받고, 원수의 유기물을 혐기성 분해하여 메탄가스를 생산하는 혐기성 분해단계 및 상기 제2정삼투처리단계에서 희석된 해수를 공급받고, 해수를 역삼투 처리하여 처리수를 생산하는 역삼투처리단계를 포함한다.In the production step, the raw water concentrated in the second forward osmosis treatment step is supplied, and the anaerobic decomposition step in which the organic material of the raw water is anaerobicly decomposed to produce methane gas, and the seawater diluted in the second forward osmosis treatment step are supplied, And a reverse osmosis treatment step of producing seawater by reverse osmosis treatment.

본 발명에 따른 하수 재이용과 해수 담수화를 위한 수처리 시스템 및 그 방법은 원수를 농축시키고, 정화된 원수를 해수에 희석시켜 담수화를 위한 용도로 사용하는 구조를 가짐에 따라, 원수에 존재하는 유기물을 재생에너지로 활용하고, 해수에서 처리수를 생산할 수 있을 뿐만 아니라, 전처리 공정을 간소화시켜 설치비, 운영비 및 소유부지 이용을 감소시키는 효과가 있다.The water treatment system and method for reuse of sewage and desalination of seawater according to the present invention concentrate the raw water, dilute the purified raw water in seawater, and have a structure used for desalination, thereby regenerating organic substances present in the raw water Not only can it be used for energy and produce treated water from sea water, it also has the effect of simplifying the pre-treatment process, reducing installation costs, operating costs, and the use of proprietary land.

또한, 본 발명은 역삼투 공정에 유입되는 해수가 두 번의 정삼투 공정을 통해 희석됨으로써, 기존의 역삼투 공정과 대비하여 에너지를 저감시킬 수 있는 동시에 최종 유출되는 농축수의 농도를 해수 수준의 농도로 유지시킬 수 있으므로, 배출되는 농축수로 인해 발생하는 환경부하를 저감시킬 수 있다. In addition, according to the present invention, since the seawater flowing into the reverse osmosis process is diluted through two forward osmosis processes, energy can be reduced compared to the existing reverse osmosis process, and the concentration of the concentrated water that is finally discharged is the concentration of the seawater level. Since it can be maintained as, it is possible to reduce the environmental load caused by the concentrated water discharged.

도 1은 본 발명의 일 실시예에 따른 하수 재이용과 해수 담수화를 위한 수처리 시스템을 도시한 공정도이다.
도 2는 본 발명의 일 실시예에 따른 하수 재이용과 해수 담수화를 위한 수처리 방법의 흐름도이다.1 is a process diagram showing a water treatment system for sewage reuse and seawater desalination according to an embodiment of the present invention.
2 is a flowchart of a water treatment method for reuse of sewage and desalination of sea water according to an embodiment of the present invention.

이하, 첨부된 도면들을 참조하여 본 발명에 따른 하수 재이용과 해수 담수화를 위한 수처리 시스템 및 그 방법의 일 실시예를 설명한다. Hereinafter, an embodiment of a water treatment system and method for reuse of sewage and desalination of seawater according to the present invention will be described with reference to the accompanying drawings.

이 과정에서 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의상 과장되게 도시되어 있을 수 있다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례에 따라 달라질 수 있다. 그러므로 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user or operator's intention or practice. Therefore, the definition of these terms should be made based on the contents throughout the present specification.

도 1은 본 발명의 일 실시예에 따른 하수 재이용과 해수 담수화를 위한 수처리 시스템을 도시한 공정도이고, 도 2는 본 발명의 일 실시예에 따른 하수 재이용과 해수 담수화를 위한 수처리 방법의 흐름도이다.1 is a process diagram showing a water treatment system for sewage reuse and seawater desalination according to an embodiment of the present invention, and FIG. 2 is a flowchart of a water treatment method for sewage reuse and seawater desalination according to an embodiment of the present invention.

본 발명의 일 실시예에 따른 하수 재이용 및 해수 담수화를 위한 수처리 시스템은 도 1에 도시된 바와 같이 제1정삼투처리부(10)와, 제2정삼투처리부(20), 혐기성처리부(30) 및 역삼투처리부(40)를 포함한다. A water treatment system for reuse of sewage and desalination of seawater according to an embodiment of the present invention includes a first forward osmosis treatment unit 10, a second forward osmosis treatment unit 20, an anaerobic treatment unit 30, as shown in FIG. It includes a reverse osmosis processing unit 40.

제1정삼투처리부(10)는 원수와 해수를 공급받는다. 이러한 제1정삼투처리부(10)는 원수와 해수를 각각 공급받아 1차적으로 원수를 농축시키고, 정화된 원수를 해수에 유입시켜 해수를 희석시키는 역할을 수행한다. 이때, 제1정삼투처리부(10)에는 원수와 해수를 구획 가능하게 공급받고, 원수를 정화시켜 해수로 유입되도록 안내하는 정삼투여과재(11)가 구비된다.The first forward osmosis treatment unit 10 receives raw water and seawater. The first forward osmosis treatment unit 10 receives raw water and sea water, respectively, and primarily concentrates the raw water and dilutes the sea water by introducing purified raw water into the sea water. At this time, the first forward osmosis treatment unit 10 is provided with a forward osmosis filter 11 to receive raw water and seawater in a partitionable manner and to guide the raw water to be introduced into the seawater.

제2정삼투처리부(20)는 제1정삼투처리부(10)에서 원수와 해수를 공급받는다. 이러한 제2정삼투처리부(20)는 제1정삼투처리부(10)에서 원수와 해수를 공급받아 2차적으로 원수를 농축시키고, 정화된 원수를 해수에 유입시켜 해수를 희석시키는 역할을 수행하는 것으로서, 중공사분리막부재(21) 및 오염세척농축부(22)를 구비한다. The second forward osmosis treatment unit 20 receives raw water and seawater from the first forward osmosis treatment unit 10. The second forward osmosis treatment unit 20 receives raw water and sea water from the first forward osmosis treatment unit 10 to secondarily concentrate the raw water, and dilutes the sea water by introducing purified raw water into the sea water. , A hollow fiber membrane member 21 and a pollution cleaning thickening unit 22.

구체적으로, 중공사분리막부재(21)는 제1정삼투처리부(10)에서 희석된 해수를 공급받고, 공급된 해수가 삼투현상을 통해 희석되도록 원수를 농축시킨다. 즉, 중공사분리막부재(21)는 외측이 원수에 잠긴 상태에서 내측으로 해수를 공급받아 원수와 해수를 구획하는 동시에 정화된 원수가 내측으로 통과 가능하게 유입되도록 안내하는 역할을 수행한다.Specifically, the hollow fiber separation membrane member 21 receives the diluted seawater from the first forward osmosis treatment unit 10, and concentrates the raw water so that the supplied seawater is diluted through the osmotic phenomenon. That is, the hollow fiber membrane member 21 receives the sea water inward while the outside is submerged in the raw water, and partitions the raw water and the sea water, and at the same time, serves to guide the purified raw water to flow through the inside.

그리고, 오염세척농축부(22)는 중공사분리막부재(21)가 원수를 농축시 상기 중공사분리막부재(21)의 표면 오염층을 세척 가능하게 원수를 농축시킨다. In addition, the contaminant washing and concentrating unit 22 concentrates the raw water so that the surface contamination layer of the hollow fiber separation membrane member 21 can be washed when the hollow fiber separation membrane member 21 concentrates the raw water.

이를 위해, 오염세척농축부(22)는 비즈(22a) 및 공기주입부(22b)를 포함한다. 여기서, 비즈(22a)는 중공사분리막부재(21)의 표면에 접촉시 오염 물질을 제거하고, 원수를 농축 가능하게 분해하도록 원수에 부유한다. To this end, the pollution cleaning and concentrating unit 22 includes beads 22a and an air injection unit 22b. Here, the beads 22a are suspended in raw water to remove contaminants upon contact with the surface of the hollow fiber separation membrane member 21 and to decompose the raw water so as to be concentrated.

이때, 비즈(22a)는 알긴산나트륨과 호기성 미생물을 혼합하여 제조될 수 있다. 이에 따라, 비즈(22a)는 원수에 부유시 호기성 미생물을 통해 원수 중의 유기물을 분해하여 원수를 농축시킬 수 있게 된다.At this time, the beads 22a may be prepared by mixing sodium alginate and aerobic microorganisms. Accordingly, the beads 22a can concentrate the raw water by decomposing organic substances in the raw water through aerobic microorganisms when suspended in the raw water.

그리고, 공기주입부(22b)는 비즈(22a)가 중공사분리막부재(21)의 표면에 접촉 가능하게 순환되도록 원수에 공기를 주입한다. 즉, 공기주입부(22b)는 제2정삼투처리부(20)의 하측에 설치되어 원수에 공기를 주입하여 원수에 부유하는 비즈(22a)를 순환 가능하게 이동시키고, 비즈(22a)의 이동시 비즈(22a)가 중공사분리막부재(21)의 외측 표면에 접촉되도록 도와주는 역할을 수행한다. Then, the air injection portion 22b injects air into the raw water so that the beads 22a are circulated so as to make contact with the surface of the hollow fiber separation membrane member 21. That is, the air injection unit 22b is installed under the second forward osmosis processing unit 20 to inject air into the raw water to move the beads 22a floating in the raw water to be circulated, and when the beads 22a are moved, the beads (22a) serves to help to contact the outer surface of the hollow fiber membrane member 21.

이에 따라, 비즈(22a)는 공기주입부(22b)를 통해 원수에서 순환되는 과정에서 중공사분리막부재(21)에 접촉되면 오염 물질을 긁어 중공사분리막부재(21)의 외측 표면에 발생하는 오염층을 제거할 수 있을 뿐만 아니라, 자중에 의해 원수의 바닥으로 가라앉는 현상이 방지될 수 있다.Accordingly, the beads 22a are contaminated on the outer surface of the hollow fiber separation membrane member 21 by scratching the contaminants when contacting the hollow fiber separation membrane member 21 in the process of being circulated in raw water through the air injection portion 22b In addition to removing the layer, the phenomenon of sinking to the bottom of the raw water by its own weight can be prevented.

또한, 제2정삼투처리부(20)는 제1정삼투처리부(10)에서 공급된 원수에서 부상하는 오염 물질을 제거하도록 스키머(23)를 구비할 수 있다. 즉, 스키머(23)는 제2정삼투처리부(20)의 상측에 위치하여 공기주입부(22b)에 의해 원수에서 부상하는 오염물질을 수거하는 역할을 수행한다.In addition, the second forward osmosis processing unit 20 may include a skimmer 23 to remove contaminants floating from the raw water supplied from the first forward osmosis processing unit 10. That is, the skimmer 23 is positioned above the second forward osmosis processing unit 20 and serves to collect pollutants floating from the raw water by the air injection unit 22b.

한편, 혐기성처리부(30)는 제2정삼투처리부(20)에서 농축된 원수를 공급받고, 농축된 원수에서 메탄가스를 생산한다. 즉, 혐기성처리부(30)는 혐기성 미생물을 이용하여 농축된 원수의 유기물을 분해시켜 재생 에너지인 메탄가스를 생산한 후에 농축 슬러지를 배출한다. Meanwhile, the anaerobic treatment unit 30 receives concentrated raw water from the second forward osmosis treatment unit 20 and produces methane gas from the concentrated raw water. That is, the anaerobic treatment unit 30 decomposes the organic material of the concentrated raw water using anaerobic microorganisms to produce methane gas, which is renewable energy, and then discharges the concentrated sludge.

이로써, 혐기성처리부(30)는 생산된 메탄가스를 본 발명에 따른 하수 재이용과 해수 담수화를 위한 수처리 시스템의 에너지원으로 이용할 수 있을 뿐만 아니라, 농축된 슬러지의 방류를 대폭적으로 줄일 수 있게 된다.As a result, the anaerobic treatment unit 30 can not only use the produced methane gas as an energy source for a water treatment system for sewage reuse and seawater desalination according to the present invention, but also significantly reduce discharge of concentrated sludge.

그리고, 역삼투처리부(40)는 제2정삼투처리부(20)에서 희석된 해수를 공급받고, 해수를 처리수와 농축수로 분리 배출한다. 이러한 역삼투처리부(40)는 제2정삼투처리부(20)에서 희석된 해수에 압력을 가해 순수한 처리수와 염분의 농축수를 분리 생산한다. 이를 위해, 역삼투처리부(40)에는 처리수와 농축수를 분리 가능하게 구획한 상태에서 정화된 농축수가 처리수에 유입되도록 안내하는 역삼투여과재(41)가 구비될 수 있다.Then, the reverse osmosis treatment unit 40 receives the diluted seawater from the second forward osmosis treatment unit 20, and separates and discharges the seawater into treated water and concentrated water. The reverse osmosis treatment unit 40 applies pressure to seawater diluted in the second forward osmosis treatment unit 20 to separately produce pure treated water and concentrated water of salt. To this end, the reverse osmosis treatment unit 40 may be provided with a reverse osmosis filter 41 that guides purified water to be introduced into the treated water in a state where the treated water and the concentrated water are separably separated.

본 발명의 일 실시예에 따른 하수 재이용 및 해수 담수화를 위한 수처리 방법은 도 2에 도시된 바와 같이 공급단계(S100), 제1정삼투처리단계(S200), 제2정삼투처리단계(S300) 및 생산단계(S400)를 포함한다.The water treatment method for sewage reuse and seawater desalination according to an embodiment of the present invention is a supply step (S100), a first forward osmosis treatment step (S200), and a second forward osmosis treatment step (S300) as shown in FIG. 2. And a production step (S400).

공급단계(S100)는 원수와 해수를 제1정삼투처리단계(S200)에 공급하는 공정이다. The supplying step (S100) is a process of supplying raw water and seawater to the first forward osmosis treatment step (S200).

제1정삼투처리단계(S200)는 공급단계(S100)에서 공급된 원수와 해수를 정삼투 처리하는 공정이다. 이러한 제1정삼투처리단계(S200)는 여과재를 통해 원수와 해수를 구획 가능하게 공급받은 후에 해수에 정화된 원수를 유입시켜 해수를 희석시키고, 원수를 농축시키는 역할을 수행한다.The first forward osmosis treatment step (S200) is a process of treating the raw water and seawater supplied in the supply step (S100) with forward osmosis. The first forward osmosis treatment step (S200) serves to dilute sea water by diluting the sea water and concentrating the raw water by introducing purified raw water into the sea water after receiving the raw water and sea water through the filter medium.

그리고, 제2정삼투처리단계(S300)는 제1정삼투처리단계(S200)에서 공급된 원수와 해수를 정삼투 처리하는 공정이다. 이러한 제2정삼투처리단계(S300)는 제1정삼투처리단계(S200)에서 원수와 해수를 공급받아 2차적으로 원수를 농축시키고, 정화된 원수를 해수에 유입시켜 해수를 희석시키는 역할을 수행한다. 이때, 제2정삼투처리단계(S300)는 삼투단계(S310), 호기성 분해단계(S320)를 포함한다.In addition, the second forward osmosis treatment step (S300) is a process of treating the raw water and seawater supplied in the first forward osmosis treatment step (S200). In the second forward osmosis treatment step (S300), raw water and seawater are supplied in the first forward osmosis treatment step (S200) to secondarily concentrate the raw water and dilute seawater by introducing purified raw water into the seawater. do. At this time, the second forward osmosis treatment step (S300) includes an osmosis step (S310) and an aerobic decomposition step (S320).

구체적으로, 삼투단계(S310)는 중공사분리막부재(21)를 통해 해수와 원수를 구획한 상태에서 해수에 정화된 원수를 유입시키는 공정이다. 이때, 중공사분리막부재(21)는 외측이 원수에 잠긴 상태에서 내측으로 해수를 공급받아 원수와 해수를 구획하고, 정화된 원수를 해수로 통과 가능하게 유입시킨다. Specifically, the osmosis step (S310) is a process of introducing purified raw water into the seawater in a state in which seawater and raw water are partitioned through the hollow fiber membrane member 21. At this time, the hollow fiber membrane member 21 receives the seawater inward while the outside is submerged in the raw water, divides the raw water and the seawater, and flows the purified raw water into the seawater so that it can pass through.

그리고, 호기성 분해단계(S320)는 비즈(22b)를 이용하여 원수의 유기물을 호기성 분해하여 원수를 농축시키는 공정이다. Then, the aerobic decomposition step (S320) is a process of concentrating the raw water by aerobic decomposition of the organic material of the raw water using beads 22b.

여기서, 비즈(22b)는 알긴산나트륨과 호기성 미생물을 혼합하여 제조될 수 있다. 이에 따라, 비즈(22a)는 원수에 부유시 호기성 미생물을 통해 원수 중의 유기물을 분해하여 원수를 농축시킬 수 있게 된다. Here, the beads 22b can be prepared by mixing sodium alginate and aerobic microorganisms. Accordingly, the beads 22a can concentrate the raw water by decomposing organic substances in the raw water through aerobic microorganisms when suspended in the raw water.

또한, 비즈(22b)는 공기주입부(22b)를 통해 원수에 공기를 주입시 중공사분리막부재(21)의 표면에 접촉 가능하게 순환될 수 있다. 이에 따라, 비즈(22a)는 공기주입부(22b)를 통해 원수에서 순환되는 과정에서 중공사분리막부재(21)에 접촉되면 오염 물질을 긁어 중공사분리막부재(21)의 외측 표면에 발생하는 오염층을 제거할 수 있을 뿐만 아니라, 자중에 의해 원수의 바닥으로 가라앉는 현상이 방지될 수 있다.In addition, the beads 22b may be circulated to allow contact with the surface of the hollow fiber membrane member 21 when air is injected into the raw water through the air injection unit 22b. Accordingly, the beads 22a are contaminated on the outer surface of the hollow fiber separation membrane member 21 by scratching the contaminants when contacting the hollow fiber separation membrane member 21 in the process of being circulated in raw water through the air injection portion 22b In addition to removing the layer, the phenomenon of sinking to the bottom of the raw water by its own weight can be prevented.

아울러, 제2정삼투처리단계(S300)는 제1정삼투처리단계(S200)에서 공급된 원수에 부상하는 오염물질을 수거하는 오염물질 수거단계(S330)를 더 포함할 수 있다.In addition, the second forward osmosis treatment step (S300) may further include a pollutant collection step (S330) of collecting pollutants floating on the raw water supplied in the first forward osmosis treatment step (S200).

한편, 생산단계(S400)는 제2정삼투처리단계(S300)에서 농축된 원수와 희석된 해수를 공급받아 원수에서 메탄가스를 생산하고, 희석된 해수에서 처리수를 생산한다. 이를 위해, 생산단계(S400)는 제2정삼투처리단계(S300)에서 농축된 원수를 공급받고, 원수의 유기물을 혐기성 분해하여 메탄가스를 생산하는 혐기성 분해단계(S410) 및 제2정삼투처리단계(S300)에서 희석된 해수를 공급받고, 해수를 역삼투 처리하여 처리수를 생산하는 역삼투처리단계(S420)를 포함한다.On the other hand, in the production step (S400), the concentrated raw water and the diluted seawater are supplied in the second forward osmosis treatment step (S300) to produce methane gas from the raw water, and the treated water is produced from the diluted seawater. To this end, the production step (S400) is supplied with the concentrated raw water in the second forward osmosis treatment step (S300), and the anaerobic decomposition step (S410) and the second forward osmosis treatment to produce methane gas by anaerobic decomposition of the organic matter of the raw water It includes a reverse osmosis treatment step (S420) to receive the diluted seawater in step (S300), and reverse-osmosis treatment to produce the treated water.

이때, 혐기성 분해단계(S410)는 농축된 원수의 유기물을 혐기성 미생물로 분해하여 재생 에너지인 메탄가스를 생산하고, 농축 슬러지를 배출한다. 그리고, 역삼투처리단계(S420)는 희석된 해수에 압력을 가해 순수한 처리수를 생산하고, 농축수를 해수 수준의 농도로 분리 배출한다. At this time, the anaerobic decomposition step (S410) decomposes the organic material of the concentrated raw water into anaerobic microorganisms to produce renewable energy, methane gas, and discharges the concentrated sludge. Then, the reverse osmosis treatment step (S420) produces pure treated water by applying pressure to the diluted seawater, and separates and discharges the concentrated water to a concentration of seawater level.

본 발명은 도면에 도시된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.The present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art belongs, various modifications and other equivalent embodiments are possible therefrom. Will understand.

따라서, 본 발명의 진정한 기술적 보호범위는 아래의 특허청구범위에 의해서 정하여져야 할 것이다.Therefore, the true technical protection scope of the present invention should be defined by the claims below.

10: 제1정삼투처리부 11: 정삼투여과재
20: 제2정삼투처리부 21: 중공사분리막부재
22: 오염세척농축부 22a: 비즈
22b: 공기주입부 23: 스키머
30: 혐기성처리부 40: 역삼투처리부
41: 역삼투여과재10: 1st forward osmosis treatment unit 11: forward osmosis filter material
20: second positive osmosis treatment unit 21: hollow fiber membrane member
22: contaminated cleaning and concentrating unit 22a: beads
22b: air injection 23: skimmer
30: anaerobic treatment unit 40: reverse osmosis treatment unit
41: reverse osmosis filter material

Claims (8)

원수와 해수를 공급받는 제1정삼투처리부;
상기 제1정삼투처리부에서 원수와 해수를 공급받는 제2정삼투압처리부;
상기 제2정삼투처리부에서 농축된 원수를 공급받고, 농축된 원수에서 메탄가스를 생산하는 혐기성처리부; 및
상기 제2정삼투처리부에서 희석된 해수를 공급받고, 해수를 처리수와 농축수로 분리 배출하는 역삼투처리부;
를 포함하는 것을 특징으로 하는 하수 재이용과 해수 담수화를 위한 수처리 시스템.
A first forward osmosis treatment unit receiving raw water and sea water;
A second forward osmosis pressure treatment unit receiving raw water and seawater from the first forward osmosis treatment unit;
An anaerobic treatment unit receiving concentrated raw water from the second forward osmosis treatment unit and producing methane gas from the concentrated raw water; And
A reverse osmosis treatment unit that receives the diluted seawater from the second forward osmosis treatment unit and separates and discharges the seawater into treated water and concentrated water;
Water treatment system for sewage reuse and seawater desalination, characterized in that it comprises a.
제1항에 있어서,
상기 제2정삼투처리부는,
원수에 잠긴 상태로 해수를 공급받고, 공급된 해수에 정화된 원수가 유입되도록 안내하여 원수를 농축시키는 중공사분리막부재; 및
상기 중공사분리막부재가 원수를 농축시 상기 중공사분리막부재의 표면 오염층을 세척 가능하게 원수를 농축시키는 오염세척농축부;
를 구비하는 것을 특징으로 하는 하수 재이용과 해수 담수화를 위한 수처리 시스템.
According to claim 1,
The second forward osmosis processing unit,
A hollow fiber membrane member that receives sea water in a state submerged in raw water and guides the purified raw water to flow into the supplied sea water to concentrate the raw water; And
A contaminant washing and concentrating unit for concentrating raw water so that the surface contaminated layer of the hollow fiber separation membrane member can be washed when the hollow fiber separation membrane member concentrates raw water;
A water treatment system for reuse of sewage and desalination of sea water, characterized by comprising a.
제2항에 있어서,
상기 오염세척농축부는,
상기 중공사분리막부재의 표면에 접촉시 오염 물질을 제거하고, 원수를 농축 가능하게 분해하도록 원수에 부유하는 비즈; 및
상기 비즈가 상기 중공사분리막부재의 표면에 접촉 가능하게 순환되도록 원수에 공기를 주입하는 공기주입부;
를 포함하는 것을 특징으로 하는 하수 재이용과 해수 담수화를 위한 수처리 시스템.
According to claim 2,
The pollution cleaning and concentration unit,
Beads floating in the raw water to remove contaminants upon contact with the surface of the hollow fiber membrane member and to decompose the raw water so as to be concentrated; And
An air injection unit for injecting air into the raw water so that the beads are circulated so as to make contact with the surface of the hollow fiber membrane member;
Water treatment system for sewage reuse and seawater desalination, characterized in that it comprises a.
제3항에 있어서,
상기 비즈는 알긴산나트륨과 호기성 미생물을 혼합하여 제조되는 것을 특징으로 하는 하수 재이용과 해수 담수화를 위한 수처리 시스템.
According to claim 3,
The beads are sodium alginate and aerobic microorganisms, a water treatment system for sewage reuse and seawater desalination, characterized by being prepared.
원수와 해수를 공급하는 공급단계;
상기 공급단계에서 원수와 해수를 공급받아 정삼투 처리하는 제1정삼투처리단계;
상기 제1정삼투처리단계에서 원수와 해수를 공급받아 정삼투 처리하는 제2정삼투처리단계; 및
상기 제2정삼투처리단계에서 농축된 원수와 희석된 해수를 공급받아 원수에서 메탄가스를 생산하고, 희석된 해수에서 처리수를 생산하는 생산단계;
를 포함하는 것을 특징으로 하는 하수 재이용과 해수 담수화를 위한 수처리 방법.
A supply step of supplying raw water and sea water;
A first forward osmosis treatment step of receiving raw water and sea water in the supply step and processing forward osmosis;
A second forward osmosis treatment step of receiving the raw water and seawater in the first forward osmosis treatment step to treat the forward osmosis; And
A production step of producing methane gas from raw water by receiving concentrated raw water and diluted seawater in the second forward osmosis treatment step, and producing treated water from diluted seawater;
Water treatment method for sewage reuse and seawater desalination, characterized in that it comprises a.
제5항에 있어서,
상기 제2정삼투처리단계는,
중공사분리막부재를 통해 해수와 원수를 구획한 상태에서 해수에 정화된 원수를 유입시키는 삼투단계; 및
비즈를 이용하여 원수의 유기물을 호기성 분해하여 원수를 농축시키는 호기성분해단계;
를 포함하는 것을 특징으로 하는 재이용과 해수 담수화를 위한 수처리 방법.
The method of claim 5,
The second forward osmosis treatment step,
An osmosis step in which purified raw water is introduced into the sea water while the sea water and the raw water are partitioned through the hollow fiber membrane member; And
An aerobic decomposition step of concentrating the raw water by aerobic decomposing the organic matter of the raw water using beads;
Water treatment method for reuse and seawater desalination, characterized in that it comprises a.
제6항에 있어서,
상기 제2정삼투처리단계는 상기 제1정삼투처리단계에서 공급된 원수에 부상하는 오염 물질을 수거하는 오염물질 수거단계를 더 포함하는 것을 특징으로 하는 하수 재이용과 해수 담수화를 위한 수처리 방법.
The method of claim 6,
The second forward osmosis treatment step further comprises a pollutant collection step of collecting pollutants floating on the raw water supplied in the first forward osmosis treatment step, and the water treatment method for sewage reuse and seawater desalination.
제5항에 있어서,
상기 생산단계는,
상기 제2정삼투처리단계에서 농축된 원수를 공급받고, 원수의 유기물을 혐기성 분해하여 메탄가스를 생산하는 혐기성 분해단계; 및
상기 제2정삼투처리단계에서 희석된 해수를 공급받고, 해수를 역삼투 처리하여 처리수를 생산하는 역삼투처리단계;
를 포함하는 것을 특징으로 하는 재이용과 해수 담수화를 위한 수처리 방법.
The method of claim 5,
The production step,
An anaerobic decomposition step in which concentrated raw water is supplied in the second forward osmosis treatment step and anaerobic decomposition of the raw water produces methane gas; And
A reverse osmosis treatment step of receiving the diluted seawater in the second forward osmosis treatment step, and reverse-osmosis treatment to produce the treated water;
Water treatment method for reuse and seawater desalination, characterized in that it comprises a.
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