KR100652934B1 - advanced water purifier get rid of the nitrate nitrogen - Google Patents

advanced water purifier get rid of the nitrate nitrogen Download PDF

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KR100652934B1
KR100652934B1 KR1020040039078A KR20040039078A KR100652934B1 KR 100652934 B1 KR100652934 B1 KR 100652934B1 KR 1020040039078 A KR1020040039078 A KR 1020040039078A KR 20040039078 A KR20040039078 A KR 20040039078A KR 100652934 B1 KR100652934 B1 KR 100652934B1
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tank
water
filtration device
reaction tank
nitrate nitrogen
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KR20050113926A (en
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임정수
이무재
박덕수
김기진
전항배
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영성산업 주식회사
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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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/586—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
    • 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/163—Nitrates
    • 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
    • C02F2209/42—Liquid level

Abstract

본 발명은 정수처리시스템에 관한 것으로, 지하원수를 저장하는 지하원수탱크(1)와; 상기 지하원수탱크(1)로부터 유입된 지하원수에 함유되어 있는 용존산소와 질산성 질소를 호기성 미생물과 탈질미생물에 의해 제거하는 1차 여과장치(2)와; 상기 1차 여과장치로부터 유입된 유출수에 함유된 미반응된 탄소원과 질산성 질소를 반응시키는 2차 여과장치(4)와; 상기 2차 여과장치(4)로부터 유입된 유출수를 폭기시키는 유량조정탱크(6)와; 상기 유량조정탱크(6)로부터 유입된 유출수에 대해 냄새제거와 유기물 흡착 및 생물학적 분해작용과 부유물질이 제거되도록 활성탄이 충진된 활성탄 여과장치(8)와; 상기 활성탄 여과장치(8)로부터 유입된 유출수를 저장하는 저수탱크(10)와; 상기 저수탱크(10)에 설치되는 염소투입기(12);를 포함하여 이루어짐으로써, 구성이 간단하여 초기설치비용 및 유지비용이 절감된다. The present invention relates to a water treatment system, and an underground raw water tank (1) for storing underground raw water; A primary filtration device (2) for removing dissolved oxygen and nitrate nitrogen contained in the underground water introduced from the underground water tank (1) by aerobic microorganisms and denitrification microorganisms; A secondary filtration device (4) for reacting the unreacted carbon source and nitrate nitrogen contained in the effluent flowing from the primary filtration device; A flow rate adjustment tank 6 for aeration of the outflow water introduced from the secondary filtration device 4; Activated carbon filtration device (8) filled with activated carbon to remove odor, adsorb organic matter, decompose biological matters and remove suspended matters on the effluent flowing from the flow rate adjustment tank (6); A storage tank (10) for storing the effluent flowing from the activated carbon filtration device (8); By including a chlorine injector 12 is installed in the water storage tank 10, the configuration is simple, the initial installation cost and maintenance cost is reduced.

지하원수, 질산성 질소, 호기성, 탈질, 미생물, 메디아, 여재, 에탄올, 용존산소Groundwater, Nitrate, Aerobic, Denitrification, Microorganism, Media, Media, Ethanol, Dissolved Oxygen

Description

질산성 질소 제거용 정수처리장치 {advanced water purifier get rid of the nitrate nitrogen}Water treatment device for removing nitrate nitrogen {advanced water purifier get rid of the nitrate nitrogen}

도 1은, 본 발명의 질산성 질소 제거용 정수처리장치의 개략적인 구성을 나타낸 도면.BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows schematic structure of the water purification apparatus for nitric acid removal of this invention.

도 2는, 도 1의 정수처리과정을 단계별로 나타낸 흐름도.Figure 2 is a flow chart showing the water treatment step of Figure 1 step by step.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

2 : 1차 여과장치 4 : 2차 여과장치2: primary filtration device 4: secondary filtration device

6 : 유량저장탱크 8 : 활성탄 여과장치6: flow rate storage tank 8: activated carbon filtration device

10 : 저장탱크 12 : 염소투입기10: storage tank 12: chlorine injector

22 : 유기탄소 저장조 24 : 인산 저장조22: organic carbon storage tank 24: phosphoric acid storage tank

26 : 약품공급펌프26: chemical supply pump

본 발명은 정수처리시스템에 관한 것으로, 더욱 상세하게는 질산성 질소로 오염된 지하원수를 음용수로 사용할 수 있도록 하기 위해 생물학적 및 물리적 여과 공정을 실행하는 질산성 질소 제거용 정수처리장치에 관한 것이다.The present invention relates to a purified water treatment system, and more particularly, to a purified water treatment apparatus for removing nitrate nitrogen, which performs biological and physical filtration processes in order to use underground water contaminated with nitrate nitrogen as drinking water.

질산성 질소(NO3 --N)를 비롯한 무기물질에 의한 지하원수 및 음용수의 오염은 많은 국가에서 중요성이 날로 증가되고 있으며, 특히 농작물을 경작하는 지역에서 질산성 질소의 오염은 큰 사회문제로 대두되고 있다. Pollution of groundwater and drinking water by inorganic materials, including nitrate nitrogen (NO 3 -- N), is of increasing importance in many countries, especially in areas where crops are cultivated. It is emerging.

현재 상업적으로 이용되고 있는 음용수 중의 질산성 질소 제거방법으로는 이온교환법, 역삼투법, 생물학적 제거법 등이 있다. Currently, commercially available methods for removing nitrate nitrogen in drinking water include ion exchange, reverse osmosis, and biological removal.

상기 역삼투(reverse osmosis)법은, 지하원수를 높은 압력(150-800 psi)의 펌프를 이용하여 특별히 제작된 막(membrane)을 통과시킴으로써 질산성 질소 이온을 분리하는 방법이다. The reverse osmosis method is a method of separating nitrate nitrogen ions by passing underground raw water through a specially prepared membrane using a pump of high pressure (150-800 psi).

그러나, 이 방법에서 사용되는 막은 이온에 대해 선택적이지 않기 때문에 무해한 이온들까지 제거시켜 박막의 막힘(fouling)으로 인한 처리 효율이 저하되고, 높은 압력의 펌프를 작동시키기 위해 많은 에너지가 소비되며, 처리 장치가 비교적 고가일 뿐만 아니라 숙련된 기술자가 상주해야 한다는 단점이 있다. However, the membrane used in this method is not selective for ions, thus removing harmless ions, resulting in poor treatment efficiency due to thin film fouling, which consumes a lot of energy to operate a high pressure pump. The disadvantage is that the device is relatively expensive and requires a skilled technician to reside.

또한, 지하원수 중 약 75 % 만이 사용가능하고 나머지 25 % 의 지하원수에서는 고농도 질산성 질소 이온으로 오염된 부산물이 재발생한다는 문제점이 있다.In addition, only about 75% of the underground water can be used, and the remaining 25% of the underground water has a problem that by-products contaminated with high concentrations of nitrate nitrogen ions are regenerated.

상기 이온 교환(ion exchange)법은, 음이온 수지(resin)에 붙어 있는 염소 이온을 질산성 질소 이온으로 교환시켜 처리하는 방법이다. The ion exchange method is a method in which chlorine ions attached to an anion resin are exchanged with nitrate nitrogen ions for treatment.

그러나 일반적으로 지하원수 중에는 2가 이온인 SO4 2- 가 많이 함유 (8 ~ 10 배)되어 있는데, 이 방법에서는 SO4 2- 가 1가 이온인 질산성 질소 이온(NO3 - 및 NO2 - )보다 쉽게 수지에 흡착되어 질산성 질소 이온의 처리효율을 저하시킨다는 문제점이 있으며, 또한 이러한 현상을 검색(monitoring)하기 위한 고가의 질산성 질소 이온 분석장치가 필요할 뿐만 아니라 포화된 수지를 교환하는 시점을 판별하기가 용이하지 않다는 단점이 있다. Generally, however, underground source water contains a large amount of bivalent ions SO 4 2- (8 to 10 times). In this method, nitrate nitrogen ions (NO 3 − and NO 2 − ) in which SO 4 2- is a monovalent ion are used. It is more easily adsorbed to the resin and lowers the processing efficiency of nitrate nitrogen ions. Also, an expensive nitrate nitrogen ion analyzer is needed to monitor this phenomenon. The disadvantage is that it is not easy to determine.

또한, 사용된 수지를 세척하는 과정에서 질산성 질소 이온으로 오염된 농축 부산물에 의해 재오염될 소지가 크고, 이에 따라 또 다른 별도의 수단이 강구되어야 한다는 번거로움이 있다.In addition, in the process of washing the used resin, there is a high possibility of being recontaminated by concentrated by-products contaminated with nitrate nitrogen ions, and thus there is a need to take another separate means.

한편, 미생물을 이용한 생물학적 제거법은, 질산성 질소 이온을 제거하는 공정에서는 수처리 이후에도 미생물이 수중에 잔류하여 미생물자체의 병원균이 감염될 우려가 있다. On the other hand, in the biological removal method using microorganisms, in the step of removing nitrate nitrogen ions, the microorganisms remain in the water even after the water treatment, so that the pathogens of the microorganisms themselves may be infected.

따라서, 처리수를 식수원으로 이용하기 위한 상수처리 공정에 미생물을 이용하는 방법을 적용하는 것은 부적합하여 이 방법은 하수처리 분야에서만 중점적으로 이루어지고 있는 실정이다.Therefore, it is inappropriate to apply the method of using microorganisms in the water treatment process for using the treated water as a drinking water source, and this method is focused only on the sewage treatment field.

본 발명은 저렴한 비용과 간단한 장치에 의해 지하원수에 함유된 질산성 질소를 제거하기 위해 안출된 것으로, 생물학적 탈질공정을 통해 질산성 질소를 제거 하는 장치와, 활성탄여과를 통한 잔류탄소원과 부유물질을 제거하는 장치 및 염소 소독장치로 이루어진 질산성 질소 제거용 정수처리장치을 제공하는데 그 목적이 있다.
The present invention was devised to remove nitrate nitrogen contained in groundwater by low cost and simple device. It is an object of the present invention to provide a water treatment apparatus for removing nitrate nitrogen consisting of a removal device and a chlorine disinfection device.

상기한 목적을 달성하기 위해 본 발명은 비피압대수층의 천층수인 지하원수를 저장하는 원수탱크(1)와; 상기 원수탱크(1)로부터 지하원수가 유입되고, 그 내부에 호기성 및 탈질미생물이 부착 성장할 수 있도록 메디아를 충진시킨 제1반응탱크(21)가 설치되며, 제1반응탱크(21) 일측에 설치되어 에탄올이 저장된 유기탄소 저장조(22) 및 인산 저장조(24) 내에 저장된 약품을 제1반응탱크(21)로 이송시키는 약품공급탱크(26)가 설치되고, 제1반응탱크(21)의 일측에 내부의 물을 강제 순환시키는 반송장치(27)가 설치되며, 제1반응탱크(21)의 하부에 외부 콤프레셔(50)와 연결된 역세용 관(28)이 설치되어 원수탱크(1)로부터 유입된 지하원수에 함유된 용존산소와 질산성 질소를 호기성 미생물과 탈질미생물에 의해 제거하는 1차 여과장치(2)와; 내부에 안트라사이트 및 모래와 자갈로 구성된 여재가 충진되며, 내측 상부에 수위감지기(422)와 웨어(424)가 설치된 제2반응탱크(42)가 1차 여과장치(2)와 연결되고, 상기 콤프레셔(50)에 연결되어 제2반응탱크(42) 내로 공기를 공급하도록 역세용 관(48)이 설치되며, 상기 1차 여과장치(2)로부터 유입된 유출수에 함유되어 미반응된 탄소원과 질산성 질소를 반응시키는 2차 여과장치(4)와; 상기 2차 여과장치(4)로부터 유입된 유출수를 폭기시키는 유량조정탱크(6)와; 상기 유량조정탱크(6)로부터 유입된 유출수에 대해 냄새제거와 유기물 흡착 및 생물학적 분해작용과 부유물질이 제거되도록 활성탄이 충진된 활성탄 여과장치(8)와; 상기 활성탄 여과장치(8)로부터 유입된 유출수를 저장하는 저수탱크(10)를 포함하는 것을 특징으로 한다.In order to achieve the above object, the present invention includes: a raw water tank (1) for storing underground raw water, which is the shallow water of the non-pneumatic aquifer; Underground water flows from the raw water tank (1), and the first reaction tank (21) filled with media so that aerobic and denitrified microorganisms are attached and grown therein, and installed on one side of the first reaction tank (21). The chemical supply tank 26 for transporting the chemicals stored in the organic carbon storage tank 22 and the phosphoric acid storage tank 24 stored in the ethanol to the first reaction tank 21 is installed, one side of the first reaction tank 21 A conveying device 27 for forcibly circulating the water inside is installed, and a backwashing pipe 28 connected to the external compressor 50 is installed at the lower portion of the first reaction tank 21 to flow in from the raw water tank 1. A primary filtration device (2) for removing dissolved oxygen and nitrate nitrogen contained in underground water by aerobic microorganisms and denitrification microorganisms; An anthracite and a filter medium composed of sand and gravel are filled therein, and a second reaction tank 42 in which a water level sensor 422 and a wear 424 are installed on an inner upper portion thereof is connected to the primary filtration device 2. A backwashing pipe 48 is installed to be connected to the compressor 50 to supply air into the second reaction tank 42, and contains unreacted carbon source and quality contained in the effluent introduced from the primary filtration device 2. A secondary filtration device 4 for reacting acidic nitrogen; A flow rate adjustment tank 6 for aeration of the outflow water introduced from the secondary filtration device 4; Activated carbon filtration device (8) filled with activated carbon to remove odor, adsorb organic matter, decompose biological matters and remove suspended matters on the effluent flowing from the flow rate adjustment tank (6); It characterized in that it comprises a storage tank (10) for storing the outflow water introduced from the activated carbon filtration device (8).

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이하 본 발명의 바람직한 실시예를 첨부된 도면을 토대로 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부된 도면 중에서, 도 1은 본 발명의 질산성 질소 제거용 정수처리장치의 개략적인 구성을 나타낸 도면이고, 도 2는 도 1의 정수처리과정을 단계별로 나타낸 흐름도이다.In the accompanying drawings, Figure 1 is a view showing a schematic configuration of the water treatment apparatus for removing nitrate nitrogen of the present invention, Figure 2 is a flow chart showing the water treatment process of Figure 1 step by step.

상기 원수탱크(1)에는, 질산성 질소가 다량으로 검출되는 비피압대수층(unconfined aquifer)에 존재하는 천층수를 지하원수(原水)로 하여 이를 펌프로 끌어올려 저장해 둔다.In the raw water tank (1), the shallow water existing in the unconfined aquifer, in which a large amount of nitrate nitrogen is detected, is used as underground raw water and is stored by pumping it.

상기 1차 여과장치(2)는, 상기 원수탱크(1)로부터 유입된 지하원수에 함유되어 있는 용존산소와 질산성 질소를 호기성 및 탈질미생물에 의해 제거하기 위한 것으로, 호기성 및 탈질미생물이 부착 성장할 수 있는 메디아가 충진된 제1반응탱크(21)와; 상기 제1반응탱크(21)의 일측에 설치된 유기탄소 저장조(22) 및 인산 저장조(24)의 약품을 제1반응탱크(21)로 이송하는 약품공급펌프(26)와; 상기 제1반응탱크(21)의 일측에 설치되어 내부의 물을 강제로 순환시킬 수 있도록 한 반송장치(27)와; 상기 제1반응탱크(21)의 하부에는 외부의 콤프레셔(50)와 연결된 역세용 관(28);을 포함하여 구성된다.The primary filtration device (2) is to remove dissolved oxygen and nitrate nitrogen contained in the underground raw water introduced from the raw water tank (1) by aerobic and denitrification microorganisms, aerobic and denitrification microorganisms are attached to grow. A first reaction tank 21 in which a media can be filled; A chemical supply pump 26 for transferring the chemicals of the organic carbon storage tank 22 and the phosphoric acid storage tank 24 installed at one side of the first reaction tank 21 to the first reaction tank 21; A conveying device (27) installed at one side of the first reaction tank (21) to circulate the water forcibly; And a backwashing pipe 28 connected to an external compressor 50 at a lower portion of the first reaction tank 21.

상기 유기탄소 저장조(22)에는 미생물의 성장과 탈질에 필요한 탄소원인 에탄올이 저장되고, 상기 인산 저장조(24)에는 미생물의 미량영양소인 인산이 저장된다. The organic carbon storage tank 22 stores ethanol, which is a carbon source necessary for the growth and denitrification of microorganisms, and the phosphoric acid storage tank 24 stores phosphoric acid, which is a micronutrient of microorganisms.

상기 반송장치(27)는, 유입구와 유출구가 상기 제1반응탱크(21)의 상,하부에 설치된 관로(270)와, 이 관로(270) 상에 설치된 순환펌프(272)로 구성된 것으로, 제1반응탱크(21) 내의 상부의 물을 하부로 순환시키도록 한다. The conveying apparatus 27 is composed of a conduit 270 provided in the upper and lower portions of the first reaction tank 21 and the circulation pump 272 provided on the conduit 270, 1 The water in the upper portion of the reaction tank 21 is circulated to the lower portion.

상기 2차 여과장치(4)는, 1차 여과장치(2)로부터 유입된 유출수에 함유된 미반응된 탄소원과 질산성 질소를 반응시키기 위한 것으로, 상기 1차 여과장치(2)와 통하도록 연결되고 내부에 안트라사이트 및 모래와 자갈로 구성된 여재가 충진된 제2반응탱크(42)와; 상기 콤프레셔(50)에 연결되어 상기 제2반응탱크(42) 내로 공기를 공급할 수 있도록 설치된 역세용 관(48);으로 구성된다. The secondary filtration device (4) is for reacting the unreacted carbon source and nitrate nitrogen contained in the effluent flowing from the primary filtration device (2), connected to the primary filtration device (2) And a second reaction tank 42 filled with an anthracite and a medium composed of sand and gravel therein; It is connected to the compressor 50, the backwashing pipe 48 is installed to supply air into the second reaction tank 42; consists of.

이때, 상기 제2반응탱크(42)의 내측 상부에는 수위를 감지하는 수위감지기(422)와 웨어(424)가 설치되어 수위가 상승하면 자동으로 상기 역세용 관을 통해 공기가 투입되고, 아울러 역세펌프(53)가 작동하여 원수탱크(1)의 물을 역세수로써 투입시켜서 역세척이 실시되고, 역세된 물은 상기 웨어(424)를 통해 외부로 배출된다. At this time, the water level detector 422 and the wear 424 for detecting the water level is installed on the inner upper portion of the second reaction tank 42, when the water level rises automatically the air is introduced through the backwashing pipe, The pump 53 operates to inject water from the raw water tank 1 into the backwash water, and backwashing is performed. The backwashed water is discharged to the outside through the weir 424.

상기 유량조정탱크(6)는, 상기 제2반응탱크(42)와 연결되며 내측에 폭기장치(62)가 설치되고, 상부에 수위감지기(64)가 설치된 것으로, 제2반응탱크(42)로부터 유입된 물을 저장해두고 일측에 설치된 이송펌프(66)를 통해 적정량씩 유출되도록 함으로써 그 후단에 설치된 활성탄 여과장치(8)와 저수탱크(10)로 유출수가 과도하게 이송되지 않도록 조절한다. The flow rate adjustment tank 6 is connected to the second reaction tank 42, the aeration device 62 is installed on the inside, the water level detector 64 is installed on the upper side, from the second reaction tank 42 By storing the introduced water and let it out by a proper amount through the transfer pump 66 installed on one side of the activated carbon filter 8 and the storage tank 10 installed in the rear end is adjusted so that the outflow water is not excessively transferred.

상기 활성탄 여과장치(8)는, 유량조정탱크(6)로부터 유입된 물의 냄새를 제거하고, 유기물질의 흡착을 위해 일정량의 활성탄이 충진되어 있다.The activated carbon filtration device 8 removes the smell of water introduced from the flow rate adjustment tank 6 and is filled with a certain amount of activated carbon for adsorption of organic substances.

상기 유량조정탱크(6)를 통과한 물은 활성탄 여과장치(8)를 통과한 후 저수 탱크(10)에 저장되고, 상기 저수탱크(10) 내에는 소독을 위해 일정한 주기로 적정량의 염소를 자동으로 투입시키는 염소투입기(12)가 설치된다.Water passing through the flow rate adjustment tank (6) is stored in the reservoir tank 10 after passing through the activated carbon filtration device (8), in the reservoir tank (10) automatically the appropriate amount of chlorine at regular intervals for disinfection A chlorine injector 12 to be introduced is installed.

여기서, 상기 염소투입기(12)는 이미 공지된 형태의 것을 사용하므로 이에 대한 상세한 설명은 생략하기로 한다.Here, since the chlorine injector 12 uses a known type, a detailed description thereof will be omitted.

이와 같이 구성된 본 발명의 각 장치들의 작용관계를 설명하면 다음과 같다.Referring to the operational relationship of each device of the present invention configured as described above are as follows.

<1차 여과장치> <Primary filtration device>

상기 제1반응탱크(21) 내부에 미생물이 부착성장할 수 있는 메디아를 충진시키되, 이때 사용되는 메디아로는 비중이 1이하인 플라스틱 계열을 사용하며 제1반응탱크(21) 용적의 60∼70%가 되도록 충진시킨다. Fill the media in which the microorganisms can adhere and grow inside the first reaction tank 21, wherein the media used is a plastic series having a specific gravity of 1 or less, and 60 to 70% of the volume of the first reaction tank 21 is Fill as much as possible.

지하원수는 상기 제1반응탱크(21)의 하부로 유입되어지며, 이때 미생물의 성장 및 탈질에 필요한 탄소원인 에탄올과 미량영양소인 인산은 상기 유기탄소 저장조(22) 및 인산 저장조(24)를 통해 제1반응탱크(21) 내로 공급된다.Underground water is introduced into the lower portion of the first reaction tank 21, where ethanol and trace nutrients, which are carbon sources necessary for the growth and denitrification of microorganisms, are stored through the organic carbon storage tank 22 and the phosphoric acid storage tank 24. It is supplied into the first reaction tank 21.

지하원수를 취수하는 과정과 저장하는 과정에서 용존산소가 녹아들어갈 수 있는데, 상기 제1반응탱크(21)의 탈질미생물은 혐기성 상태 또는 무산소 상태에서 질산성질소 이온을 전자수용체로 사용하여 최종적으로 질소가스로 방출시킨다. Dissolved oxygen may dissolve in the process of taking underground water and storing it. The denitrification microorganism of the first reaction tank 21 uses nitrogen nitrate ions as an electron acceptor in an anaerobic or anoxic state. Release to gas.

따라서 용존산소 농도가 높은 지하원수의 탈질시에는 용존산소의 제거가 선행되어야 하며, 본 발명에서는 호기성 미생물을 이용하여 용존산소를 소모시킴과 동시에 탈질미생물을 이용하여 질산성질소를 제거하고자 하는 것이다. Therefore, the removal of dissolved oxygen should be preceded when denitrification of underground raw water having a high dissolved oxygen concentration. In the present invention, the dissolved oxygen is consumed by using aerobic microorganisms and at the same time, the denitrification microorganisms are used to remove nitrate nitrogen.

상기 1차 여과장치(2)에서 미생물에 의해 일어나는 반응은 아래와 같다.The reaction caused by the microorganisms in the primary filtration device 2 is as follows.

* 호기성 미생물에 의한 용존산소 제거 : * Removal of dissolved oxygen by aerobic microorganisms:

C2H5OH + 3O2 → 2CO2 ＋ 3H2O … (1)C 2 H 5 OH + 3O 2 → 2CO 2 + 3H 2 O. (One)

* 탈질미생물에 의한 질산성질소의 제거 : * Removal of nitrate nitrogen by denitrification microorganisms:

C2H5OH ＋ 2NO3 - → 2CO2 + 3H2O + N2 … (2) C 2 H 5 OH + 2NO 3 - → 2CO 2 + 3H 2 O + N 2 ... (2)

본 발명에서는 상기 반응 (1)과 (2)를 고려하여 탄소원과 질산성질소의 비(C(COD)/N(NO3 --N) ratio)를 2 ∼ 5 : 1의 범위로 산정하였다. In the present invention, in consideration of the above reaction (1) and (2) carbon and the nitrate bovine non-a (C (COD) / N ( NO 3 -N) ratio) 2 ~ 5: 1 was estimated in the range of.

상기 제1반응탱크(21)의 역세는 타이머로 주기를 설정하여 1∼2주에 한번씩 공기역세를 실시하며, 이때 메디아에 과량으로 부착되어 있던 미생물들은 공기에 의해 탈리되어 반응탱크 하부로 배출된다.The backwashing of the first reaction tank 21 is carried out by air backwashing once every 1 to 2 weeks by setting a cycle with a timer. At this time, the microorganisms attached to the median are detached by the air and discharged to the bottom of the reaction tank. .

<2차 여과장치><Secondary filtration device>

2차 여과장치(4)는, 안트라사이트 및 모래와 자갈로 구성된 여재를 제2반응탱크(42) 용적의 60∼70%가 되도록 충진한다. The secondary filtration device 4 fills the filter medium composed of anthracite and sand and gravel to be 60 to 70% of the volume of the second reaction tank 42.

상기 1차 여과장치(2)를 통과한 유출수는 제2반응탱크(42)의 상부로 유입된다.Outflow water passing through the primary filtration device 2 is introduced into the upper portion of the second reaction tank 42.

상기 2차 여과장치(4)에서는 상기 1차 여과장치(2)에서 미반응된 탄소원과 질산성질소가 최종적으로 반응하여 유출수에는 더 이상의 탄소원은 잔류하지 않게 되며, 질산성질소 역시 안정적인 농도로 유출된다. In the secondary filtration unit 4, the unreacted carbon source and the nitrate nitrogen are finally reacted in the primary filtration unit 2, so that no more carbon source remains in the effluent, and the nitrate nitrogen also flows out at a stable concentration. do.

또한, 2차 여과장치(4)는 제2반응탱크상부에 설치된 수위감지기(422)에 의해 자동으로 역세가 이루어지며, 역세수와 공기에 의해 탈리된 미생물들은 제2반응탱크(42) 상부로 배출된다. In addition, the secondary filtration device 4 is automatically backwashed by the water level detector 422 installed on the second reaction tank, the microorganisms detached by the backwash water and air to the upper portion of the second reaction tank 42 Discharged.

<활성탄 여과장치>Activated Carbon Filtration System

상기 2차 여과장치(4)를 통과한 유출수는 유량조정탱크(6)로 유입되며, 이때 유량조정탱크(6) 안에 설치된 폭기장치(62)에 의해 용존산소는 포화상태가 된다. 폭기된 물은 후단에 위치한 활성탄 여과장치(8)로 유입된다.The outflow water passing through the secondary filtration device 4 flows into the flow regulating tank 6, where dissolved oxygen is saturated by the aeration device 62 installed in the flow regulating tank 6. The aerated water flows into the activated carbon filter 8 located at the rear end.

상기 유량조정탱크(6)에서의 폭기로 인해 활성탄 여과장치(8)는 호기성 상태에서 운전됨으로서 냄새제거 및 유기물질의 흡착 및 생물학적 분해작용과 부유물질 제거 등의 기능을 갖는다.Due to the aeration in the flow rate adjustment tank 6, the activated carbon filtration device 8 is operated in an aerobic state and thus has functions such as odor removal, adsorption of organic substances, biological decomposition and removal of suspended solids.

또한, 활성탄 여과장치(8)는 타이머로 역세주기를 설정하여 1∼2일에 한번씩 수역세를 실시한다.In addition, the activated carbon filtration device 8 sets a backwash cycle with a timer and performs water washing once every 1-2 days.

<자동염소투입기><Auto chlorine injector>

상기 활성탄 여과장치(8)를 통과한 유출수는 저수탱크(10)로 유입되며, 이때 염소소독을 실시함으로서 처리수내 존재할 가능성이 있는 미생물의 살균 및 저수조내 증식을 방지하고, 급수과정에서 적정량의 잔류염소를 유지할 수 있도록 한다.The effluent passing through the activated carbon filtration device 8 is introduced into the water storage tank 10. At this time, by chlorine disinfection, sterilization of microorganisms that may exist in the treated water and proliferation in the water storage tank are prevented. Make sure you keep chlorine.

상기 염소투입기(12)는 이미 시중에 통용되는 제품을 사용하는 것이므로, 이에 대한 상세한 설명은 생략한다.Since the chlorine injector 12 is to use a product already available on the market, a detailed description thereof will be omitted.

아래의 표 1은 본 발명의 질산성 질소 제거용 정수처리장치(A)의 실험조건을 나타낸 것이고, 표 2는 실험결과를 나타낸 것이다.Table 1 below shows the experimental conditions of the purified water treatment apparatus (A) for nitrate nitrogen removal of the present invention, and Table 2 shows the experimental results.

본 실시예는 일처리량 15 ton 규모로 실시하였다. 원수로 사용된 지하수의 수질은 실험기간동안 평균 용존산소가 9 mg/L로 포화상태에 가까웠으며, 질산성질소는 14 mg/L로 일정하게 유지되었다.This example was carried out on a daily throughput of 15 ton scale. Groundwater used as raw water was saturated at an average dissolved oxygen of 9 mg / L and nitrogen nitrate was maintained at 14 mg / L during the experimental period.

원수의 취수시설은 관정에 포함된 수중펌프 및 유량조정조, 전기제어반으로 구성되어 있으며, 1차 여과장치(아크릴, D 600 mm×H1, 700 mm)는 상향류식으로 플라스틱 메디아(원통형, D 50 mm)를 충진하였고, 2차 여과장치(아크릴, D 600 mm×H 1,700 mm)는 하향류식으로 안쓰라사이트 및 모래, 자갈여재로 구성하였으며 1차 및 2차 여과장치 모두 자동역세장치를 부착하였다. The raw water intake facility consists of submersible pump, flow control tank, and electric control panel included in the well, and the primary filtration device (acrylic, D 600 mm × H1, 700 mm) is a plastic media (cylindrical, D 50 mm) ), And the secondary filtration device (acrylic, D 600 mm × H 1700 mm) was composed of anthracite, sand, gravel filter in the downflow, and both the primary and secondary filtration devices were equipped with automatic backwashing device.

본 발명의 실험조건은 표 1과 같다. Experimental conditions of the present invention are shown in Table 1.

주요장치Main device 여과방식Filtration method 여과속도 (m/d)Filtration rate (m / d) 유량 (L/min)Flow rate (L / min) EBCT (min)EBCT (min) 역세유량 (L/min)Backwash flow rate (L / min) 역세주기 및 시간Backwash cycle and time 1차 여과장치Primary filtration device 상향류식Upflow 6060 1111 2424 -- 1회/10일, 10min1 time / 10 days, 10min 2차 여과장치Secondary filtration equipment 하향류식Downflow 6060 1111 2424 6060 1회/일, 10min1 time / day, 10min 활성탄여과장치Activated Carbon Filter 압력식Pressure 286286 2525 3.53.5 25 ∼ 4025-40 1회/일, 10min1 time / day, 10min

탄소원 : 에탄올 Carbon Source: Ethanol

C/N 비 : 3 ~ 5C / N ratio: 3 to 5

표 2. 먹는물 수질검사 결과Table 2. Drinking water quality test result

주요검사항목Main inspection items 기 준standard 검사결과 test results                                          지하원수Underground water 최종처리수Final treated water 일반세균General bacteria 100CFU/ml이하100 CFU / ml or less 00 00 총대장균군Total coliform group 불검출/100mlNot detected / 100ml 불검출Not detected 불검출Not detected 분원성대장균군Coliform bacillus 불검출/100mlNot detected / 100ml 불검출Not detected 불검출Not detected 질산성질소Nitrate nitrogen 10mg/l이하Less than 10mg / l 14.114.1 5.45.4 냄새smell 무취Odorless 적합fitness 적합fitness 맛flavor 무미insipidity 적합fitness 적합fitness 수소이온농도Hydrogen ion concentration 5.8 ∼ 8.55.8 to 8.5 5.95.9 6.56.5

이상에서 설명한 바와 같이, 본 발명에 따른 질산성 질소 제거용 정수처리장치는 구성이 간단하여 초기설치비용이 절감될 수 있고, 또한 장치의 유지비용이 저렴한 장점이 제공된다. As described above, the water purification apparatus for removing nitrate nitrogen according to the present invention is simple in configuration, and thus the initial installation cost can be reduced, and the maintenance cost of the device is low.

Claims (5)

비피압대수층의 천층수인 지하원수를 저장하는 원수탱크(1)와;A raw water tank (1) for storing underground raw water, which is the ground water of the non-aqueous aquifer; 상기 원수탱크(1)로부터 지하원수가 유입되고, 그 내부에 호기성 및 탈질미생물이 부착 성장할 수 있도록 메디아를 충진시킨 제1반응탱크(21)가 설치되며, 제1반응탱크(21) 일측에 설치되어 에탄올이 저장된 유기탄소 저장조(22) 및 인산 저장조(24) 내에 저장된 약품을 제1반응탱크(21)로 이송시키는 약품공급탱크(26)가 설치되고, 제1반응탱크(21)의 일측에 내부의 물을 강제 순환시키는 반송장치(27)가 설치되며, 제1반응탱크(21)의 하부에 외부 콤프레셔(50)와 연결된 역세용 관(28)이 설치되어 원수탱크(1)로부터 유입된 지하원수에 함유된 용존산소와 질산성 질소를 호기성 미생물과 탈질미생물에 의해 제거하는 1차 여과장치(2)와;Underground water flows from the raw water tank (1), and the first reaction tank (21) filled with media so that aerobic and denitrified microorganisms are attached and grown therein, and installed on one side of the first reaction tank (21). The chemical supply tank 26 for transporting the chemicals stored in the organic carbon storage tank 22 and the phosphoric acid storage tank 24 stored in the ethanol to the first reaction tank 21 is installed, one side of the first reaction tank 21 A conveying device 27 for forcibly circulating the water inside is installed, and a backwashing pipe 28 connected to the external compressor 50 is installed at the lower portion of the first reaction tank 21 to flow in from the raw water tank 1. A primary filtration device (2) for removing dissolved oxygen and nitrate nitrogen contained in underground water by aerobic microorganisms and denitrification microorganisms; 내부에 안트라사이트 및 모래와 자갈로 구성된 여재가 충진되며, 내측 상부에 수위감지기(422)와 웨어(424)가 설치된 제2반응탱크(42)가 1차 여과장치(2)와 연결되고, 상기 콤프레셔(50)에 연결되어 제2반응탱크(42) 내로 공기를 공급하도록 역세용 관(48)이 설치되며, 상기 1차 여과장치(2)로부터 유입된 유출수에 함유되어 미반응된 탄소원과 질산성 질소를 반응시키는 2차 여과장치(4)와;An anthracite and a filter medium composed of sand and gravel are filled therein, and a second reaction tank 42 in which a water level sensor 422 and a wear 424 are installed on an inner upper portion thereof is connected to the primary filtration device 2. A backwashing pipe 48 is installed to be connected to the compressor 50 to supply air into the second reaction tank 42, and contains unreacted carbon source and quality contained in the effluent introduced from the primary filtration device 2. A secondary filtration device 4 for reacting acidic nitrogen; 상기 2차 여과장치(4)로부터 유입된 유출수를 폭기시키는 유량조정탱크(6)와;A flow rate adjustment tank 6 for aeration of the outflow water introduced from the secondary filtration device 4; 상기 유량조정탱크(6)로부터 유입된 유출수에 대해 냄새제거와 유기물 흡착 및 생물학적 분해작용과 부유물질이 제거되도록 활성탄이 충진된 활성탄 여과장치(8)와;Activated carbon filtration device (8) filled with activated carbon to remove odor, adsorb organic matter, decompose biological matters and remove suspended matters on the effluent flowing from the flow rate adjustment tank (6); 상기 활성탄 여과장치(8)로부터 유입된 유출수를 저장하는 저수탱크(10)를 포함하는 것을 특징으로 하는 질산성 질소 제거용 정수처리장치.And a storage tank (10) for storing the effluent flowing from the activated carbon filtration device (8). 삭제delete 삭제delete 삭제delete 제1항에 있어서,The method of claim 1, 상기 유량조정탱크(6)는 내측에 폭기장치(62)를 설치하고, 상부에 수위감지기(64)를 설치한 것을 특징으로 하는 질산성 질소 제거용 정수처리장치.The flow rate adjustment tank (6) is provided with an aeration device (62) on the inside, and a water level detector (64) on the upper, characterized in that the nitrate nitrogen removal water treatment apparatus.
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