KR100538384B1 - Well to well circulation recovering nitrate pollution in the groundwater - Google Patents
Well to well circulation recovering nitrate pollution in the groundwater Download PDFInfo
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- KR100538384B1 KR100538384B1 KR1020040045790A KR20040045790A KR100538384B1 KR 100538384 B1 KR100538384 B1 KR 100538384B1 KR 1020040045790 A KR1020040045790 A KR 1020040045790A KR 20040045790 A KR20040045790 A KR 20040045790A KR 100538384 B1 KR100538384 B1 KR 100538384B1
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/2873—Particular arrangements for anaerobic reactors with internal draft tube circulation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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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
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Abstract
본원 발명은 질산성 질소로 오염된 지하수를 현장에서 채수하지 않은 상태로 복수(2개 이상)의 처리용 우물(well)을 이용하여 전자공여체의 주입과 지하수 순환을 통해 생물학적으로 질산성 질소를 제거하는 방법에 관한 것이다.The present invention removes biologically nitrate nitrogen through injection of an electron donor and groundwater circulation using a plurality of (well two or more) wells for treatment of groundwater contaminated with nitrate nitrogen. It is about how to.
이를 위하여 본원 발명은, 현장에 지하수 흐름을 고려한 2쌍 이상의 주입, 순환용 우물을 축조하고, 상류부 우물에서 약액의 주입, 하류부에서 지하수를 순환시켜 지하수의 흐름 벽을 형성시킨다는 특징이 있으며, 지하에 미생물을 위한 전자공여체에 있어서, 푸마레이트(fumarate), 포름에이트(formate), 락테이트(lactate)를 액상으로 주입하고, 주입정에 패커(packer) 설치 후 패커를 통하여 약액을 적절히 주입하는 방법으로 이루어진 것에 특징이 있다.To this end, the present invention is characterized in that the construction of two or more pairs of injection, circulation wells in consideration of the groundwater flow to the site, the injection of the chemical liquid in the upstream well, the groundwater circulating in the downstream to form a flow wall of groundwater, In the electron donor for microorganisms, fumarate, formate, and lactate are injected into the liquid phase, and after the packer is installed in the injection well, the medicine is properly injected through the packer. It is characterized by consisting of.
Description
본원 발명은 질산성 질소로 오염된 지하수를 현장에서 채수하지 않은 상태로 복수(2개 이상)의 처리용 우물(well)을 축조하여 이 우물을 통한 전자공여체의 주입과 지하수 순환을 통해 생물학적으로 질산성 질소를 제거하는 방법에 관한 것이다.The present invention constructs a plurality of (well two or more) treatment wells without collecting nitrate-nitrogen-contaminated groundwater on site, and injects electron donors through the wells and biologically It relates to a method for removing acidic nitrogen.
지하수를 상수원으로 사용하는데 가장 먼저 제기되는 문제점은 질산성 질소(nitrate, NO3 -)에 의한 오염이며, 고농도의 질산성질소를 음용수 등으로 섭취할 경우 청색증(bule baby 증후군), 암유발 등 인체 건강에 매우 위협적이라는 것이다. 질산성 질소는 농경지, 산업활동의 오염원으로부터 지하수에 침투되어 오랜 기간에 걸쳐 머물러 있게 되어 지하수내 오염도는 시간이 경과함에 따라 심화되며 또한 주목해야할 점은 일단 수중에 질소가 존재하면 기존의 정수처리 과정이나 가정용 정수기 등으로 제거가 곤란하다는 것이다.The problem addressed first to use the groundwater as a water source is nitrate nitrogen (nitrate, NO 3 -), and contamination by, if you consume high levels of nitrate in drinking water, such as cyanosis (bule baby syndrome), cancer such as human It is very dangerous for your health. Nitrate nitrogen penetrates groundwater from pollutants in agricultural lands and industrial activities and stays for a long time, so the pollution level in groundwater is intensified with time and it should be noted that once nitrogen exists in water, the existing water treatment process It is difficult to remove it with a household water purifier.
이러한 질산성 질소를 제거하는 방법은 크게 화학적 처리와 생물학적 처리로 나눌 수 있는데, 화학적 처리로 질소를 제거하는 방법으로서 영가 금속 등을 이용하는 방법들이 일부 소개되고 있으나 현실적으로 적용하기에는 매우 어렵다는 단점을 갖고 있다. 따라서 수중의 질산성 질소를 제거하는 가장 경제적이며 효율적인 방법은 생물학적 탈질소화방법이라고 알려져 있으나 일단 수원으로부터 채수된 이후에는 음용수 처리의 특성상 처리 미생물의 확보와 미생물의 살균, 소독 등의 이유로 생물학적 처리가 곤란해지게 된다는 문제점을 안고 있다.Such a method of removing nitrate nitrogen can be broadly divided into chemical treatment and biological treatment. Some methods using zero valent metals have been introduced as a method of removing nitrogen by chemical treatment, but have a disadvantage in that it is very difficult to apply in practice. Therefore, the most economical and efficient method of removing nitrate nitrogen from water is known as biological denitrification method, but once it is collected from the water source, it is difficult to treat biologically because of the nature of drinking water treatment, because of securing microorganisms, sterilizing and disinfecting microorganisms. There is a problem that will be.
한편, 생물학적 질산성 질소 제거를 위한 주 대사 경로는 환원성 탈질소 효소에 의한 반응으로 무산소(anoxic) 상태에서 종속 영양 탈질균(heterotrophic denitrifiers)에 의해 NO2 -, NO3 -를 분자상의 질소가스(N2, N2O, NO)로 환원시키는 과정을 통상 의미하는데, 이들 탈질 미생물들은 성장에 필요한 에너지를 질산성 질소(nitrate)로부터 질소가스로 환원하는 과정에서 얻지만 세포합성을 위한 전자공여체(electron donor)로 탄소원이 필요하게 된다. 일반적으로 폐수처리의 탈질소를 위하여 유기 탄소원으로 메탄올(methanol)이 많이 사용되지만 지하수의 질산성 질소를 제거하기 위해서는 지하 공간 내로 많은 양을 확산 시켜야 하므로 메탄올을 사용할 경우 경제성이 떨어지고, 휘발성이 강한 메탄올의 특성상 지상탱크에서 지하로 효율적으로 주입되지 못하며 물에 대한 용존성도 떨어지게 된다. 특히 지하수에서는 탄소원에 의한 미생물의 과도한 성장은 지하수의 흐름을 방해할 수 있기 때문에 가능한 미생물 성장량을 최소화하는 탄소원이 요구되어 진다.On the other hand, the main metabolic pathway is NO 2 by the heterotrophic denitrifying bacteria (heterotrophic denitrifiers) in anaerobic (anoxic) state by reaction with a reducing denitrification enzymes for the removal of biological nitrate -, NO 3 -, nitrogen gas on the molecule ( N 2 , N 2 O, NO) usually means a process of reducing, these denitrifying microorganisms are obtained in the process of reducing the energy required for growth from nitrate nitrogen (nitrate) to nitrogen gas (electron donor for cell synthesis ( An electron donor) requires a carbon source. Methanol is generally used as an organic carbon source for the denitrification of wastewater treatment, but in order to remove nitrate nitrogen from the groundwater, a large amount needs to be diffused into the underground space. Due to its characteristics, it cannot be injected efficiently from the ground tank into the ground and its water solubility is also reduced. In particular, in groundwater, the excessive growth of microorganisms by carbon sources can interfere with the flow of groundwater, so a carbon source is required to minimize the amount of microbial growth possible.
본원 발명은 상기와 같은 문제점을 해결하기 위해 현장에 지하수 흐름을 고려하여 2쌍 이상의 주입, 순환용 우물을 축조하여, 상류부 우물에서 약액을 주입하고, 하류부에서 지하수를 순환시켜 지하수의 흐름벽을 형성시킴으로써 오염된 지하수를 채수하지 않은 상태에서 생물학적으로 질산성 질소를 제거하는데 본원 발명의 목적이 있다.In order to solve the problems described above, the present invention constructs two or more pairs of injection and circulation wells in consideration of the groundwater flow to the site, injects a chemical solution from the upstream well, and circulates the groundwater from the downstream to form a flow wall of groundwater. It is an object of the present invention to remove biologically nitrate nitrogen without forming contaminated groundwater by forming.
또한 지하에 미생물을 위한 전자공여체에 있어서, 푸마레이트(fumarate), 포름에이트(formate), 락테이트(lactate)를 액상으로 주입하고, 주입정에 패커를 설치한 후 이 패커를 통해 약액을 적절히 주입하는 방법으로 이루어진다는 것에 특징이 있다.In addition, in the basement electron donor for microorganisms, fumarate, formate, and lactate are injected into the liquid phase, and a packer is installed in the injection well, and the chemical solution is appropriately injected through the packer. It is characterized by the way it is made.
상기와 같이 본원 발명의 목적을 달성하기 위하여, 질산성 질소로 오염된 지하수를 채수하지 않은 상태로 현장에서 생물학적으로 제거하기 위한 방법은 도 1에 도시된 웰투웰(well to well) 순환 방법을 구현하기 위한 개략도에서 현장 내에 약액 주입정(1)과 순환정(2)의 우물을 굴착 후 지하수 순환으로 오염물질을 제거하게 된다.좀 더 구체적으로는 질산성 질소로 오염된 지하수를 현장에서 채수하지 않은 상태로 생물학적으로 질산성 질소를 제거하는 방법에 있어서, 상류 측과 하류 측에 각각 주입정과 순환정을 축조하고, 상기 상류 측의 주입정에는 액상의 푸마레이트(fumarate), 포름에이트(formate), 또는 락테이트(lactate) 중에서 선택되는 하나의 전자공여체 약액을 주입하고, 상기 하류 측의 순환정은 펌프를 이용하여 지하수를 순환시키되, 상기 상류 측의 주입정에 패커스탠드로부터 패커보호선에 의해 연장견인되며 소정의 간격으로 설치된 패커를 삽입하여 주입공간을 확보한 후 별도의 용액탱크로부터 연장되어 삽입된 관을 통하여 상기 전자공여체 약액을 지하수의 수위 표면 근처에 주입시켜 지하수내의 질산성 질소오염을 복원하는 웰투웰 순환법을 제공하는 것이다.In order to achieve the object of the present invention as described above, the method for biologically removing the groundwater contaminated with nitrate nitrogen in the field without collecting water implements the well to well circulation method shown in FIG. In the schematic diagram, the wells of the chemical injection well (1) and the circulation well (2) are excavated in the site to remove contaminants from the groundwater circulation. More specifically, the groundwater contaminated with nitrate nitrogen is not collected at the site. In a method for removing biologically nitrate nitrogen in an untreated state, an injection well and a circulating well are respectively constructed upstream and downstream, and a liquid fumarate and formate are formed in the upstream injection well. One or more of the electron donor chemical solution selected from lactate (lactate), the downstream side of the circulation well circulates the groundwater using a pump, the upstream side A packer installed at predetermined intervals is inserted into the injection well by a packer protection line, and the injection space is secured by inserting packers installed at predetermined intervals, and then the electron donor chemical liquid is transferred from a separate solution tank to the surface of the groundwater level. By injecting nearby to provide a well-to-well circulation method to restore nitrate nitrogen contamination in groundwater.
본원 발명에 의한 웰투웰(well to well) 순환법에 의한 지하수내의 질산성 질소의 원위치(In-Situ) 오염 복원 방법 및 그 장치는 첨부도면에 따라 상세히 설명한다.An in-situ contamination restoration method and apparatus thereof for nitrate nitrogen in groundwater by a well to well circulation method according to the present invention will be described in detail according to the accompanying drawings.
도 1은 상류부의 주입정(1)에서 용액탱크(5)에 들어있는 액상인 전자 공여체를 패커(3)를 이용하여 액상으로 주입할 수 있고, 하류부의 순환정(2)에서는 순환펌프(4)를 통해 지하수를 순환시켜 지하수 흐름벽이 형성되게 함으로써 미생물의 현장내 반응시간 확보와 하류로의 유출을 낮추어주는 특징이 있다.FIG. 1 shows that an electron donor, which is a liquid contained in a solution tank 5, can be injected into a liquid phase using a packer 3 in an injection well 1 of an upstream portion, and a circulation pump 4 in a downstream circulation well 2. By circulating the groundwater through the ground), the groundwater flow wall is formed, thereby securing the reaction time of microorganisms in the field and lowering the outflow to the downstream.
한편 본원 발명에서 미생물은 특정 미생물을 주입하는 것이 아니고 토양 내에 존재하는 일반 토양 미생물을 활용하는 것으로 탈질소 미생물은 일반 토양 내에 광범위하게 존재하므로 질산성 질소가 존재하는 조건에서 유기 탄소원만 공급해주면 활동을 유발할 수가 있는데, 본원 발명에 의하면 액상인 전자 공여체는 여러 가지 탄소원을 적용, 실험한 결과 가격이 저렴하고 물에 대한 용존성과 이온화도가 좋으며, 미생물의 성장이 최소로 되면서 탈질소 속도를 최대화 시킬 수 있는 탄소원으로 푸마레이트(fumarate), 포름에이트(formate), 락테이트(lactate)를 이용한다.Meanwhile, in the present invention, the microorganism does not inject a specific microorganism but utilizes general soil microorganisms present in the soil, and since denitrification microorganisms are widely present in general soil, supplying only an organic carbon source under conditions in which nitrate nitrogen is present is effective. According to the present invention, the liquid electron donor has a low cost, good water dissolution and ionization, and can maximize the denitrification rate while minimizing the growth of microorganisms. Fumarate, formate, and lactate are used as carbon sources.
도 2는 현장 주입, 순환정을 설치하였을 때의 지하수 흐름도를 나타낸 그림이며, 도 3은 패커의 모식도를 나타낸 그림으로서 상류부의 주입정에 패커스탠드(11)로부터 패커보호선(12)에 의해 연장견인된 패커를 주입하여 주입정의 통로를 확보한 후 에어탱크(9)로부터 에어를 공급하여 패커를 팽창시켜 패커(3) 사이의 통로를 밀폐한다. 이 때 페커압력게이지(10)에 의해 적절한 패커압력이 조절되며, 상기 패커(3)에 의해 주입공간이 확보되면 용액탱크(5)로부터 전자공여체인 약액이 공급되는 것이다. 이러한 패커를 이용할 경우 지하수 수리 표면의 가장 적합한 지점에 약액을 용이하게 주입함으로써 지하수와 효율적이고 경제적으로 반응하게 한다는 장점이 있다.2 is a diagram showing the groundwater flow chart when the site injection and circulation wells are installed, and FIG. 3 is a diagram showing a schematic diagram of the packer, which is extended from the packer stand 11 by the packer protection line 12 to the injection well of the upstream portion. After injecting the pulled packer to secure the passage of the injection well, air is supplied from the air tank 9 to expand the packer to seal the passage between the packers 3. At this time, the appropriate packer pressure is controlled by the pecker pressure gauge 10, and when the injection space is secured by the packer 3, the chemical liquid, which is an electron donor, is supplied from the solution tank 5. The use of such a packer has the advantage that the chemical solution can be easily injected to the most suitable point of the groundwater repair surface to react with the groundwater efficiently and economically.
이상에서 상술한 바와 같이 본원 발명은, 질산성 질소로 오염된 지하수를 채수하지 않은 상태로 현장에서 생물학적으로 제거함으로서 수처리 장치 제작, 운영비가 전혀 없으며 지하에 미생물을 위한 전자공여체를 액상 또는 기상으로 주입하여 현장에서 단 시간에 질산성 질소를 제거시킴은 물론, 현장의 약액 또는 기체 주입 시 패커를 이용하여 현장 지하수 수리조건에 적합한 지점에 주입하여 효율적이고 경제적으로 반응하게 하는 장점이 있다.As described above, the present invention, by removing biologically contaminated ground water with nitrate nitrogen in the field, there is no water treatment device manufacturing and operating costs, and injecting the electron donor for microorganisms in the liquid or gas phase underground By removing the nitrate nitrogen in a short time in the field, as well as the injection of a chemical or gas in the field using a packer to the point suitable for the site groundwater repair conditions, there is an advantage to react efficiently and economically.
또한 현장 내에 2쌍이상의 우물 굴착 후 약액 주입정과 순환정에 의한 지하수 순환으로 오염물질과 미생물의 현장 내 반응시간 확보와 하류로의 유출을 방지하고, 전자공여체의 토양 내 흡착과 적응 미생물의 반응벽 형성에 의한 질산성 질소 제거를 위한 미생물 막 형성으로 장기적으로 오염을 제거할 수 있는 장점이 있다.Also, after excavating two or more pairs of wells in the site, the groundwater circulation by the chemical injection well and the circulation well ensures the reaction time of contaminants and microorganisms in the field and prevents the outflow to the downstream. There is an advantage that can be removed in the long term by the formation of a microbial membrane for the removal of nitrate nitrogen by the formation.
도 1은 현장 웰투웰(well to well) 순환 방법을 구현하기 위한 개략도1 is a schematic diagram for implementing an in-situ well to well circulation method
도 2는 현장 주입, 순환정의 설치 및 지하수 흐름도2 is a field injection, installation of the circulation well and groundwater flow chart
도 3은 약액의 적정 주입을 위한 패커의 모식도Figure 3 is a schematic diagram of the packer for titration of the drug solution
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 주입정 2 : 순환정1: injection well 2: circulation tablet
3 : 패커 4 : 순환펌프3: packer 4: circulation pump
5 : 용액탱크 6 : 지표면5: solution tank 6: surface
7 : 생물활성지대 8 : 모니터링 우물7: bioactive zone 8: monitoring wells
9 : 에어탱크 10 : 패커 압력 게이지9: air tank 10: packer pressure gauge
11 : 패커 스탠드 12 : 패커 보호선11: packer stand 12: packer protection line
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| KR1020040045790A KR100538384B1 (en) | 2004-06-18 | 2004-06-18 | Well to well circulation recovering nitrate pollution in the groundwater |
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| KR1020040045790A KR100538384B1 (en) | 2004-06-18 | 2004-06-18 | Well to well circulation recovering nitrate pollution in the groundwater |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100988393B1 (en) | 2008-12-19 | 2010-10-18 | (주)그린텍환경컨설팅 | Apparatus and method for In-situ Bioremediation of contaminated ground water |
| KR101341822B1 (en) | 2013-10-11 | 2013-12-16 | 주식회사 티에스케이그린바이로 | Aerobic dechlorination system and process thereof |
| CN103708694A (en) * | 2014-01-08 | 2014-04-09 | 昆山工研院华科生物高分子材料研究所有限公司 | Microorganism dredging method and device |
| KR20170071932A (en) | 2015-12-16 | 2017-06-26 | 대한민국 (관리부서 : 환경부 국립환경과학원장) | Method for calculating injection amount of external carbon source by considering stoichiometry amount for denitrification and groundwater velocity for in situ bioremediation of nitrate-contaminated groundwater |
| WO2017131321A1 (en) * | 2016-01-25 | 2017-08-03 | 고려대학교 산학협력단 | System for reducing nitrate nitrogen in underground water |
| KR101826755B1 (en) * | 2016-01-25 | 2018-02-07 | 고려대학교 세종산학협력단 | System using refined tablets containing bentonite for remediating nitrate contaminated ground water |
| KR101826756B1 (en) * | 2016-01-25 | 2018-03-22 | 고려대학교 세종산학협력단 | System using refined tablets containing sand for remediating nitrate contaminated ground water |
| KR20190120869A (en) | 2018-04-17 | 2019-10-25 | 고려대학교 산학협력단 | Monitoring and remediation system for bioremediation of nitrate contaminated groundwater |
| KR20210133902A (en) | 2020-04-29 | 2021-11-08 | 한국과학기술연구원 | Biological natural attenuation enhancement and monitoring system of nitrate in groundwater |
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- 2004-06-18 KR KR1020040045790A patent/KR100538384B1/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100988393B1 (en) | 2008-12-19 | 2010-10-18 | (주)그린텍환경컨설팅 | Apparatus and method for In-situ Bioremediation of contaminated ground water |
| KR101341822B1 (en) | 2013-10-11 | 2013-12-16 | 주식회사 티에스케이그린바이로 | Aerobic dechlorination system and process thereof |
| CN103708694A (en) * | 2014-01-08 | 2014-04-09 | 昆山工研院华科生物高分子材料研究所有限公司 | Microorganism dredging method and device |
| CN103708694B (en) * | 2014-01-08 | 2015-07-01 | 昆山工研院华科生物高分子材料研究所有限公司 | Microorganism dredging method and device |
| KR20170071932A (en) | 2015-12-16 | 2017-06-26 | 대한민국 (관리부서 : 환경부 국립환경과학원장) | Method for calculating injection amount of external carbon source by considering stoichiometry amount for denitrification and groundwater velocity for in situ bioremediation of nitrate-contaminated groundwater |
| KR101826755B1 (en) * | 2016-01-25 | 2018-02-07 | 고려대학교 세종산학협력단 | System using refined tablets containing bentonite for remediating nitrate contaminated ground water |
| WO2017131321A1 (en) * | 2016-01-25 | 2017-08-03 | 고려대학교 산학협력단 | System for reducing nitrate nitrogen in underground water |
| KR101826756B1 (en) * | 2016-01-25 | 2018-03-22 | 고려대학교 세종산학협력단 | System using refined tablets containing sand for remediating nitrate contaminated ground water |
| KR20190120869A (en) | 2018-04-17 | 2019-10-25 | 고려대학교 산학협력단 | Monitoring and remediation system for bioremediation of nitrate contaminated groundwater |
| KR20210133902A (en) | 2020-04-29 | 2021-11-08 | 한국과학기술연구원 | Biological natural attenuation enhancement and monitoring system of nitrate in groundwater |
| CN115710039A (en) * | 2022-11-25 | 2023-02-24 | 吉林大学 | Circulating well repairing system and method |
| CN115710039B (en) * | 2022-11-25 | 2024-03-19 | 吉林大学 | Circulating well repairing system and method |
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