KR20010000952A - Removal of Nitrogen in Waste Water using Plasma Device - Google Patents

Removal of Nitrogen in Waste Water using Plasma Device Download PDF

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Publication number
KR20010000952A
KR20010000952A KR1020000064190A KR20000064190A KR20010000952A KR 20010000952 A KR20010000952 A KR 20010000952A KR 1020000064190 A KR1020000064190 A KR 1020000064190A KR 20000064190 A KR20000064190 A KR 20000064190A KR 20010000952 A KR20010000952 A KR 20010000952A
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wastewater
ozone
ammonia gas
plasma generator
ammonia
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KR1020000064190A
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Korean (ko)
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지영호
지종기
남찬우
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지영호
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Priority to KR1020000064190A priority Critical patent/KR20010000952A/en
Publication of KR20010000952A publication Critical patent/KR20010000952A/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/4606Treatment of water, waste water, or sewage by electrochemical methods for producing oligodynamic substances to disinfect the water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/78Treatment of water, waste water, or sewage by oxidation with ozone
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/02Specific form of oxidant
    • C02F2305/023Reactive oxygen species, singlet oxygen, OH radical

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physical Water Treatments (AREA)

Abstract

PURPOSE: An apparatus that uses high-density plasma to transfer nitrogen in wastewater into ammonia gas is provided. In this apparatus, ozone, anion including electron and radical generated by plasma generator are diffused into wastewater, consequently raising the pH of wastewater. To accelerate above reaction, additionally ultrasonic waves over 20,000 Hz are propagated into wastewater, dissociated OH radicals from water molecular oxidize-decompose hydrated organics and heavy metals. CONSTITUTION: The method includes following process: (i) ozone, anion including electron and radical generated by plasma generator are diffused into wastewater by using blower (11) through diffuser (13), thereby raising the pH of wastewater between 8 to 11, and also an ultrasonic generator (8) is used to accelerate the above reaction. Finally ammonia in wastewater is changed to ammonia gas as NaOH is injected to the wastewater through a chemical tank (16) for the pH of wastewater being kept between 10.5-11; (ii) Ammonia gas prepared in a pH control tank (3), ozone, and anion made by a plasma generator (7) of a denitrification cell (4) by using a blower (12) is over-aerated, thereby transferring NH3-H ion into ammonia gas in the pH range of 10.5 to 11. And then, generated ammonia gas is treated in an ammonia treatment apparatus (19) after passing through a dew remover (9), a ventilator (10) and a dehumidifier (18); (iii) FeCl36H2O or Al2(SO4)318H is put into the treated wastewater through chemical tank (17) of aggregation, precipitation and neutralization tank (5), and solid in wastewater is aggregated and precipitated in the pH range of 7 to 8. Then wastewater is exhausted through a wastewater outlet (2).

Description

플라즈마를 이용한 폐수의 탈질처리 방법과 그 장치{Removal of Nitrogen in Waste Water using Plasma Device}Method for denitrification of wastewater using plasma and its device {Removal of Nitrogen in Waste Water using Plasma Device}

본 발명은 고밀도 플라즈마를 이용한 오ㆍ폐수의 탈질 처리 방법과 장치에 관한 것으로 상세하게는, 각종 폐수에 라디칼과 전자를 포함하는 음이온과 오존을 버블링 시키면, 각종 음이온과 오존의 작용으로 폐수의 pH가 8 ∼ 11로 상승하고, 이 때 폐수중의 암모니아가 암모니아 기체 분자 형태로 변환되어 공기 중으로 날아가면서, 폐수 중에 녹아있는 암모니아성 질소 성분을 제거하는 폐수처리 방법과 장치에 관한 것이다. 이미 60 ∼ 70년대부터 폐수로부터 암모니아를 제거하는 방법으로 폐수의 pH를 약 10.8이상으로 유지하면서 용존 기체 상태로 된 암모니아(NH3)를 스트리핑 시키거나 분무못을 사용하는 방법이 있어왔다. 또한 생물학적 방법으로는 수화된 암모늄 이온을 연속 호기 생화학적 작용(질산화)을 통해 질산이온(NO3 -)으로 전환시키고, 최종적으로 아질산이온(NO2 -)으로 전환시킨 후 산소가 없는 조건하에서 생화학적 작용(탈질화)을 통해 질소가스(N2)로 전환시켜 제거해 왔다. 그러나 기존의 이러한 방법 등에서는 많은 시설비와 pH를 높이기 위한 수산화나트륨(NaOH) 등의 시약 비용 및 긴 반응시간 등이 문제가 되어 왔으며, 고농도의 질소화합물이 함유되어 있는 폐수에 대해서는 안정적인 처리 방법이 되지 못했다.The present invention relates to a method and apparatus for denitrification of wastewater using high density plasma. Specifically, when anion and ozone containing radicals and electrons are bubbled into various wastewater, the pH of the wastewater is controlled by the action of various anions and ozone. The present invention relates to a wastewater treatment method and apparatus for removing ammonia nitrogen components dissolved in wastewater while rising to 8 to 11, wherein ammonia in wastewater is converted into ammonia gas molecules and flows into the air. Since the 60s and 70s, there has been a method of stripping ammonia (NH 3 ) in the dissolved gas state or using a spray nail while maintaining the pH of the waste water at about 10.8 or more. The biological method also converts hydrated ammonium ions into nitrate ions (NO 3 ) through continuous aerobic biochemical action (nitrification), and finally into nitrite ions (NO 2 ), followed by biochemistry under oxygen-free conditions. It has been removed by converting it to nitrogen gas (N 2 ) through its action (denitrification). However, such existing methods have been problematic for many facilities costs, reagent costs such as sodium hydroxide (NaOH) to increase pH, and long reaction time, and it is not a stable treatment method for wastewater containing high concentrations of nitrogen compounds. I couldn't.

본 발명은 질소화합물이 포함된 각종 폐수에 플라즈마 발생기에서 만들어진 전자 및 라디칼을 포함하는 음이온과 오존을 버블링 시키면 이러한 각종 음이온과 오존의 작용으로 이 들 폐수의 pH가 8 ∼ 11로 상승하고, 이 때 폐수의 pH조정을 위해 수산화나트륨(NaOH) 등의 염기성 염이나 그 용액을 넣어 pH를 10.5 ∼ 11로 유지하면서, 다시 플라즈마 발생기에서 만들어진 음이온과 오존을 버블링 시켜 pH저하를 방지함과 동시에, 폐수 중의 암모니아가 암모니아 기체분자 형태로 변환되어 공기 중으로 날아가면서, 폐수 중에 녹아있는 암모니아성 질소 성분을 제거하려는데 그 목적이 있다. 또한 이러한 반응을 촉진시키기 위해 20,000Hz 이상의 초음파를 사용해, 초음파의 충격파로 인해 분해된 물의 수산화 이온(OH-)이 발생되어 물의 pH를 높이고, 폐수 중에 수화된 유기물이나 중금속 착이온 등을 산화ㆍ분해 시킨다.According to the present invention, when bubbling anions and ozone containing electrons and radicals made in a plasma generator to various wastewaters containing nitrogen compounds, the pH of these wastewaters rises to 8-11 due to the action of these various anions and ozone. In order to adjust the pH of the wastewater, add a basic salt such as sodium hydroxide (NaOH) or a solution thereof to maintain the pH at 10.5 to 11, while again bubbling anion and ozone produced in the plasma generator to prevent the pH decrease. The purpose is to remove the ammonia nitrogen component dissolved in the waste water as the ammonia in the waste water is converted into ammonia gas molecules and flows into the air. In addition, with the above 20,000Hz ultrasound in order to facilitate this reaction, hydroxide ions of the water due to the decomposition of the ultrasonic shock waves (OH -) to increase the pH of the water is generated, oxidizing the organic substances or heavy metal complex ion such as hydrated and decomposed in the waste water Let's do it.

본 발명은 본 발명에 앞서 출원한 바 있는 실용신안 등록 제0177618호 초음파 결합 고밀도 플라즈마 폐수처리 방법과 그 장치(특허출원번호 제99-36738호), 실용신안 등록 제0170240호 고밀도 플라즈마 발생장치(특허출원번호 제99-36170호), 실용신안 등록 제0190380호 대용량 고밀도 플라즈마 발생장치에 적용할 수 있다.The present invention is a utility model registration No. 0177618 ultrasonic coupled high density plasma wastewater treatment method and apparatus thereof (Patent Application No. 99-36738), utility model registration No. 0170240 high-density plasma generator (patent Application No. 99-36170), Utility Model Registration 090380 It can be applied to a large capacity high density plasma generator.

도 1 : 본 발명의 플라즈마를 이용한 폐수의 탈질처리 장치에 대한 평면도1 is a plan view of the denitrification treatment apparatus for wastewater using the plasma of the present invention

도 2 : 본 발명의 폐수내 플라즈마 주입 방법에 대한 구성도2 is a block diagram of the plasma injection method in the wastewater of the present invention

도 3 : 본 발명의 폐수내 플라즈마 주입 방법에 대한 또 다른 구성도3 is another configuration of the plasma injection method in the wastewater of the present invention

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

(1) - 폐수 유입로(1)-wastewater inlet

(2) - 폐수 배출로(2)-wastewater discharge furnace

(3) - pH 조정조(3)-pH adjusting tank

(4) - 탈질조(4)-denitrification tank

(5) - 응집ㆍ침전 및 중화조(5)-flocculation, sedimentation and neutralization tanks

(6)(7)(23)(31) - 플라즈마 발생기(6) (7) (23) (31)-Plasma Generator

(8) - 초음파 발생기(8)-ultrasonic generator

(9) - 물방울 제거장치(9)-Water Drop Remover

(10) - 송풍기10-blower

(11)(12)(21) - 브로워(11) (12) (21)-Brow

(13)(14)(25) - 산기관(13) (14) (25)-diffusers

(15) - 공기 유입구15-air inlet

(16)(17) - 약품탱크(16) (17)-chemical tank

(18) - 제습기18-Dehumidifier

(19) - 암모니아 제거장치(19)-Ammonia Removal Device

(20)(26) - 처리조(20) (26)-Treatment Tank

(22)(32) - 공기조절 밸브(22) (32)-Air Control Valve

(24) - 체크 밸브24-check valve

(27) - 순환펌프(27)-circulation pump

(28) - 폐수순환 유입관(28)-wastewater circulation inlet pipe

(29) - 유량조절 밸브(29)-Flow Control Valve

(30) - 인젝터30-injector

(33) - 폐수순환 유출관(33)-Wastewater Circulation Outlet

이하, 본 발명의 공정단계에 대하여 설명하고자 한다.Hereinafter, the process steps of the present invention will be described.

본 발명은 도 1에서와 같이 다음의 공정단계로 구성된다.The present invention consists of the following process steps as in FIG.

pH 조정조(3)에서 폐수유입로(1)를 통하여 들어오는 유입폐수에 플라즈마 발생기(6)에서 만들어진 라디칼과 전자 등으로 구성된 음이온과 오존을 브로워(11)를 이용하여 산기관(13)을 통하여 버블링 시키고, 이들의 작용으로 유입폐수의 pH를 8 ∼ 11로 높이며, 상기 반응을 촉진시키기 위해 초음파 발생기(8)를 이용하여 pH와 온도의 상승작용을 돕도록 하고, 최종적으로 폐수의 pH가 10.5 ∼ 11 사이에서 유지되도록 약품탱크(16)를 통하여 수산화나트륨(NaOH) 등의 염기성 염이나 그 수용액을 넣어 폐수중의 암모니아를 암모니아 기체상태로 만드는 단계;Bubble anion and ozone composed of radicals and electrons made in the plasma generator 6 to the influent wastewater coming in from the pH adjusting tank 3 through the wastewater inflow passage 1 through the diffuser 13 using a brower 11. Ring, and by their action to increase the pH of the influent wastewater to 8 to 11, to facilitate the synergy of the pH and temperature by using an ultrasonic generator (8) to promote the reaction, and finally the pH of the wastewater is 10.5 Putting a basic salt such as sodium hydroxide (NaOH) or an aqueous solution thereof through the chemical tank 16 so as to be maintained between 11 and 11 to bring the ammonia in the waste water into an ammonia gas state;

상기 pH 조정조(3)에서 만들어진 암모니아 기체를 탈질조(4)의 플라즈마 발생기(7)에서 만들어진 음이온 및 오존이나 공기를 브로워(12)를 이용하여 산기관(14)을 통하여 과폭기 시켜 암모늄 이온(NH4 +)을 pH 10.5 ∼ 11의 영역에서 암모니아 기체 분자형태로 공기 중으로 날려보낸 후 공기유입구(15)로 들어오는 공기와 함께 물방울 제거장치(9)와 송풍기(10)를 거쳐 제습기(18)에서 수분을 제거한 후 암모니아 처리장치(19)로 이동하여 제거하는 단계;The ammonia gas produced in the pH adjusting tank 3 is over-aerated through an acid pipe 14 using an anion and ozone or air generated in the plasma generator 7 of the denitrification tank 4 using the brower 12 to form ammonium ions ( NH 4 + ) is blown into the air in the form of ammonia gas molecules in the range of pH 10.5-11, and then dehumidifier 18 is passed through the water droplet removing device 9 and the blower 10 together with the air entering the air inlet 15. Removing water and moving to the ammonia treatment device 19 to remove the water;

상기 탈기된 폐수에 응집ㆍ침전 및 중화조(5)의 약품탱크(17)를 통하여 염화제2철(FeCl3ㆍ6H2O)이나 황산알루미늄(Al2(SO4)3ㆍ18H2O) 등의 응집제를 넣어 폐수내의 고형물을 응집ㆍ침전 시키는 동시에 pH를 7 ∼ 8로 낮추어 처리하거나, 중화제로 황산(H2SO4)등의 산성염과 그 수용액을 넣어 중화하여 폐수 배출로(2)로 배출하는 단계;Through the chemical tank 17 of the agglomeration, sedimentation and neutralization tank 5 to the degassed wastewater, ferric chloride (FeCl 3 · 6H 2 O) or aluminum sulfate (Al 2 (SO 4 ) 3 · 18H 2 O) The flocculant such as agglomerates to solidify and sediment the solids in the wastewater and at the same time lowers the pH to 7-8, or neutralize by adding acidic salts such as sulfuric acid (H 2 SO 4 ) and its aqueous solution as a neutralizing agent. Discharging;

로 이루어지게 된다.Will be made.

도 2와, 도 3은 pH 조정조에서 폐수의 pH를 8.5 ∼ 11로 상승시키거나, 탈질조에서 탈질을 위한 폐수의 폭기시, 폐수내 플라즈마와 공기의 주입 방법에 대한 구성도로서 브로워(21)로 플라즈마와 공기를 주입시키는 도 2와, 인젝터(30)를 이용해서 플라즈마와 공기를 주입시키는 도 3으로 구분 될 수 있다.2 and 3 are diagrams illustrating a method of injecting plasma and air into the wastewater when raising the pH of the wastewater to 8.5 to 11 in the pH adjustment tank or aeration of the wastewater for denitrification in the denitrification tank. 2 to inject plasma and air into the furnace, and FIG. 3 to inject plasma and air by using the injector 30.

도 2는 브로워(21)를 이용하여 처리조(20) 하단의 산기관(25)을 이용하여 플라즈마와 공기를 주입하는 방법으로 공기의 유량은 공기조절 밸브(22)를 이용하여 조절하며, 폐수의 역류를 막기 위해서 체크 밸브(24)를 플라즈마 발생기(23) 하단에 설치한다.2 is a method of injecting plasma and air by using the diffuser 25 at the bottom of the treatment tank 20 by using the brower 21, and the flow rate of the air is controlled by using the air control valve 22, and the wastewater. In order to prevent the reverse flow of the check valve 24 is installed at the bottom of the plasma generator (23).

도 3은 인젝터(30)를 이용하여 처리조(26) 하단의 폐수순환 유출관(33)으로 플라즈마와 공기를 주입하는 방법으로, 순환펌프(27)를 이용하여 처리조(26) 하단의 폐수 순환유입관(28)으로 유입된 폐수를 인젝터(30) 부분에서 플라즈마 또는 공기와 혼합되도록 한다. 이 때 플라즈마 및 공기의 유량은 플라즈마 발생기(31) 하부의 공기조절 밸브(32)와 유량조절 밸브(29)에서 조절하며, 플라즈마 및 공기와 혼합된 폐수는 순환펌프(27)를 거쳐 처리조(26) 하단의 폐수순환 유출관(33)으로 순환되어진다. 이 외에 탈질조(4)에 에어레이터를 설치하여 플라즈마 발생기에서 만들어진 플라즈마와 공기를 직접적으로 폐수 중에 혼합시킬 수 있다.3 is a method of injecting plasma and air into the wastewater circulation outlet pipe 33 at the bottom of the treatment tank 26 using the injector 30, and wastewater at the bottom of the treatment tank 26 using the circulation pump 27. Wastewater introduced into the circulation inlet pipe 28 is mixed with plasma or air at the injector 30. At this time, the flow rate of the plasma and air is controlled by the air control valve 32 and the flow control valve 29 under the plasma generator 31, and the wastewater mixed with the plasma and air is treated by a treatment tank (circulating pump 27). 26) is circulated to the waste water circulation outlet pipe 33 at the bottom. In addition, by installing an aerator in the denitrification tank 4, the plasma and air produced in the plasma generator can be directly mixed in the wastewater.

이하, 본 발명에 대하여 설명하고자 한다.Hereinafter, the present invention will be described.

본 발명은 염색폐수, 피혁폐수, 석유화학폐수, 제지폐수 등과 같은 산업폐수와 축산폐수, 분뇨폐수 및 쓰레기 매립장 침출수 등의 생활폐수에 고전압 방전을 이용한 플라즈마 발생기에서 만들어지는 각종 라디칼과 전자 등으로 이루어진 음이온과 오존을 버블링 시키면, 이들 음이온과 오존이 물과 반응하여 수산화이온(OH-)을 증가시키는 작용으로 폐수의 pH가 8 ∼ 11로 높아지는 것을 이용한다. 이렇게 pH가 8 ∼ 11로 높아진 폐수에 수산화나트륨(NaOH) 등의 염기성 염과 그 수용액, 또는 여기에 더해서 충격파로 물을 분해하여 수산화이온(OH-)을 만드는 초음파 등을 사용하여 이 들 폐수의 pH를 10.5 ∼ 11로 조정한다.The present invention consists of various radicals and electrons made by plasma generator using high voltage discharge in industrial wastewater such as dyeing wastewater, leather wastewater, petrochemical wastewater, papermaking wastewater, and domestic wastewater such as livestock wastewater, manure wastewater and landfill leachate When bubbling anions and ozone, the pH of the wastewater rises to 8-11 by the action of these anions and ozone reacting with water to increase the hydroxide ion (OH ). In this way the pH is in addition to the basic salts and their aqueous solutions, or here, such as sodium hydroxide (NaOH) to the waste water increased to 8-11 split water to shock hydroxide ions (OH -) by using ultrasonic waves, or the like to create this the waste water pH is adjusted to 10.5-11.

--------------------------- 식(1) --------------------------- Formula (1)

이 상태의 폐수내 암모늄 이온(NH4 +)성 질소는 중성에서는 식(1)과 같이 좌우반응이 평형상태를 이루나, pH가 증가함에 따라 평형은 위 식(1)에서 오른쪽 방향으로 이동하게 된다. 25℃, pH 10.8인 상태에서 암모니아의 97.3%가 물에 용존된 암모니아 기체 분자 형태로 존재하게 된다. 또한 초음파의 작용으로 인한 폐수의 수온 상승도 암모니아 가스(NH3)의 생성을 증가시킨다. 이와 같이 pH 10.5 ∼ 11로 조정된 폐수에 플라즈마 발생기에서 만들어진 음이온과 오존을 버블링 시키거나 또는 공기를 과폭기 시켜 폐수내의 암모니아 기체 분자 형태로 존재하는 질소화합물을 제거시킨다. 이 때 송풍기를 사용하여 탈질조 내의 압력을 외기압보다 낮은 상태로 유지시켜 암모니아 제거 효율을 높인다. 이렇게 제거된 암모니아는 송풍기, 제습기, 암모니아 제거장치 등을 통해 분리 제거된다.In this state, ammonium ion (NH 4 + ) nitrogen in the wastewater is neutralized in the neutral side as shown in Eq. (1), but as pH increases, the equilibrium moves to the right in Eq. (1). . At 25 ° C. and pH 10.8, 97.3% of ammonia is present in the form of ammonia gas molecules dissolved in water. In addition, an increase in the temperature of the waste water due to the action of ultrasonic waves also increases the production of ammonia gas (NH 3 ). In this way, the wastewater adjusted to pH 10.5-11 is bubbled with anion and ozone produced by the plasma generator, or the air is over-aerated to remove nitrogen compounds present in the form of ammonia gas molecules in the wastewater. At this time, by using a blower, the pressure in the denitrification tank is maintained at a lower state than the outside air pressure to increase the ammonia removal efficiency. The ammonia thus removed is separated and removed through a blower, a dehumidifier, and an ammonia removal device.

이하, 본 발명의 실시 예를 설명한다.Hereinafter, embodiments of the present invention will be described.

쓰레기 매립장 침출수 중 총 질소의 농도가 82ppm인 유입폐수에 플라즈마 발생기에서 만들어진 라디칼과 전자 등을 포함한 음이온과 오존을 버블링 시켜 총 체류시간에 대한 pH의 변화를 하기 표 1에 나타내었다.Table 1 shows the change in pH for the total residence time by bubbling anion and ozone, including radicals and electrons made in a plasma generator, into an inflow wastewater having a total nitrogen concentration of 82 ppm in the landfill leachate.

체류시간(hr)Retention time (hr) pHpH 06120612 7.38.08.87.38.08.8

또한, 상기 공정 후 NaOH를 넣어 pH를 10.5 ∼ 11사이로 조정한 처리 폐수에 플라즈마 발생기에서 만들어진 라디칼과 전자 등을 포함한 음이온과 오존을 버블링 시켜 총 체류시간에 대한 총 질소의 농도 변화를 하기 표 2에 나타내었다.In addition, after the above process by adding NaOH to adjust the pH between 10.5 and 11 by bubbling anion and ozone including radicals and electrons made in the plasma generator in the treated wastewater to change the concentration of total nitrogen for the total residence time Table 2 Shown in

체류시간(hr)Retention time (hr) 총 질소 농도(ppm)Total Nitrogen Concentration (ppm) 제거율(%)% Removal 06120612 82.40661.87239.50682.40661.87239.506 24.952.124.952.1

상기 결과에 의하여, 플라즈마 발생기에서 만들어진 라디칼과 전자 등의 음이온과 오존을 버블링 시켜 폐수의 pH를 8 ∼ 11로 높인 후, 수산화나트륨(NaOH)과 초음파를 사용하여 pH를 10.5 ∼ 11로 조정한 후, 음이온과 오존을 다시 버블링 시키거나, 공기를 과폭기 시켜 폐수 중에 용존된 질소 화합물을 효과적으로 제거할 수 있다.According to the above results, the pH of the wastewater was raised to 8-11 by bubbling anions and ozone such as radicals and electrons produced in the plasma generator, and then the pH was adjusted to 10.5-11 using sodium hydroxide (NaOH) and ultrasonic waves. Thereafter, the anion and ozone may be bubbled again, or the air may be over-aerated to effectively remove nitrogen compounds dissolved in the wastewater.

본 발명에 의하면, 염색폐수, 피혁폐수, 석유화학폐수, 제지폐수 등과 같은 산업폐수와 축산폐수, 분뇨폐수 및 쓰레기 매립장 침출수 등의 생활폐수에 고전압 방전을 이용한 플라즈마 발생기에서 만들어진 각종 라디칼과 전자 등으로 이루어진 음이온, 오존을 버블링 시키면 이들 음이온과 오존의 작용으로 이들 폐수의 pH를 8 ∼ 11로 높일 수 있었다. 이 때 20,000Hz 이상의 초음파를 이용하여 물을 분해시켜 수산화 이온(OH-)을 만들고 동시에 폐수의 온도를 상승시키며 반응을 촉진시킬 수 있었다. 이렇게 pH가 8 ∼ 11로 높아진 각종 폐수에 수산화나트륨(NaOH) 등의 염기성 염이나 그 수용액을 이용하여 pH를 10.5 ∼ 11로 조정하여 유지시킨 후, 각종 라디칼과 전자 등으로 이루어진 음이온과 오존을 버블링 시키거나, 공기를 과폭기 시켜 각종 폐수 중에 암모니아성 질소 화합물을 효과적으로 제거할 수 있다.According to the present invention, industrial wastewater, such as dyeing wastewater, leather wastewater, petrochemical wastewater, papermaking wastewater, and the like, and various radicals and electrons made in plasma generators using high-voltage discharges in domestic wastewater such as livestock wastewater, manure wastewater, and landfill leachate By bubbling the anions and ozone, the pH of these wastewaters was increased to 8-11 by the action of these anions and ozone. At this time, by using an ultrasonic or more 20,000Hz to split water hydroxyl ion (OH -) could be created and at the same time raises the temperature of the waste water to promote the reaction. After the pH is adjusted to 10.5 to 11 using basic salts such as sodium hydroxide (NaOH) or an aqueous solution of the various wastewaters having a pH of 8 to 11, and then anion and ozone composed of various radicals and electrons are bubbled. The ammonia nitrogen compound can be effectively removed from various wastewaters by ringing or overaeration of air.

또한 이렇게 플라즈마 발생기에서 만들어진 각종 라디칼과 전자 등으로 이루어진 음이온, 오존 등을 버블링 시키면, 음이온과 오존 등의 작용으로 각종 폐수의 pH를 8 ∼ 11로 높일 수 있는 방법으로 기존의 물리적 탈질 방법에서 수산화나트륨(NaOH) 등의 염기성 염이나 그 수용액만을 사용하여 폐수의 pH를 10.5 ∼ 11로 조정하는데 비해 상대적으로 적은 양의 염기성 염이나, 이러한 염기성 염의 사용 없이도 고전압 방전을 이용한 플라즈마 발생기만으로 각종 오ㆍ폐수의 pH를 탈질에 필요한 10.5 ∼ 11로 조정할 수 있다.In addition, by bubbling anions and ozone composed of various radicals and electrons made in the plasma generator, the pH of various wastewaters can be raised to 8-11 by the action of anions and ozone. Using only basic salts such as sodium (NaOH) or an aqueous solution thereof to adjust the pH of the wastewater to 10.5 to 11, a relatively small amount of basic salts, or a plasma generator using high voltage discharge without using such basic salts, can be used for various wastewater and wastewater. The pH of can be adjusted to 10.5 to 11 necessary for denitrification.

Claims (2)

고전압 방전을 이용한 플라즈마 발생기에서 만들어진 라디칼과 전자 등의 음이온과 오존 등을 브로워나 산기관, 인젝터를 사용해, 각종 오ㆍ폐수에 용존시켜 폐수의 pH를 8 ∼ 11로 높이는 방법과 그 장치.A method and apparatus for increasing the pH of wastewater to 8 to 11 by dissolving anion and ozone such as radicals and electrons produced by a plasma generator using a high voltage discharge in various wastewater and wastewater using a brower, an acid pipe, and an injector. 고농도 질소 화합물을 포함하는 각종 폐수를 처리하는데 있어서 고전압 방전을 이용한 플라즈마 발생기에서 만들어진 각종 라디칼과 전자 등으로 이루어진 음이온과 오존을 버블링 시켜 폐수의 pH를 8 ∼ 11로 높인 후, 초음파나 수산화나트륨(NaOH) 등의 염기성 염이나 그 수용액을 사용하여 폐수의 pH를 10.5 ∼ 11로 조정하여, 폐수내의 암모늄이온을 암모니아 기체 분자 상태로 변환시키고, 고전압 방전을 이용한 플라즈마 발생기에서 만들어진 각종 라디칼과 전자 등으로 이루어진 음이온과 오존을 버블링 시키거나 공기를 과폭기 시켜 암모늄 이온을 암모니아 기체 분자상태로 변환시켜 각종 폐수내의 암모니아 기체를 제거하여, 폐수내 고농도 질소화합물을 제거하는 방법으로 각종 폐수내의 암모니아성 질소화합물을 제거하는 방법과 그 장치.In the treatment of various wastewaters containing high concentration nitrogen compounds, anion and ozone composed of various radicals and electrons made in plasma generator using high voltage discharge are bubbled to raise the pH of the wastewater to 8-11 and then ultrasonic wave or sodium hydroxide ( The pH of the wastewater is adjusted to 10.5-11 using a basic salt such as NaOH) or an aqueous solution thereof, and the ammonium ions in the wastewater are converted into ammonia gas molecular state, and various radicals and electrons produced in the plasma generator using high voltage discharge are used. Ammonia nitrogen compounds in various wastewaters by bubbling the anions and ozone formed or by over-aeration of air to convert ammonium ions into ammonia gas molecular state to remove ammonia gas from various wastewaters and to remove high concentrations of nitrogen compounds in the wastewater. How to remove and its device.
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KR100733592B1 (en) * 2004-11-09 2007-07-03 주식회사 도영엔지니어링 Backfill system of integral bridge and its construction method to minimize the backfill pressure and to prevent the approach slab from its settlement
CN101928090A (en) * 2010-08-05 2010-12-29 南京大学 Method and device for governing landscape water by low-temperature plasma and air stripping combination process
WO2020048191A1 (en) * 2018-09-03 2020-03-12 大渊环境技术(厦门)有限公司 Plasma denitriding device and use method thereof

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KR20000039366A (en) * 1998-12-12 2000-07-05 최동민 Method for purifying using oxygen ion
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WO2020048191A1 (en) * 2018-09-03 2020-03-12 大渊环境技术(厦门)有限公司 Plasma denitriding device and use method thereof

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