JP2002066555A - Method for removing nitrate ions - Google Patents
Method for removing nitrate ionsInfo
- Publication number
- JP2002066555A JP2002066555A JP2000305490A JP2000305490A JP2002066555A JP 2002066555 A JP2002066555 A JP 2002066555A JP 2000305490 A JP2000305490 A JP 2000305490A JP 2000305490 A JP2000305490 A JP 2000305490A JP 2002066555 A JP2002066555 A JP 2002066555A
- Authority
- JP
- Japan
- Prior art keywords
- nitrate ions
- chamber
- cathode
- anode
- reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 10
- -1 nitrate ions Chemical class 0.000 title abstract description 18
- 229910002651 NO3 Inorganic materials 0.000 title abstract description 16
- 230000005684 electric field Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000003411 electrode reaction Methods 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims 1
- 230000033116 oxidation-reduction process Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000002351 wastewater Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 102000001554 Hemoglobins Human genes 0.000 description 1
- 108010054147 Hemoglobins Proteins 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000010349 cathodic reaction Methods 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 150000004005 nitrosamines Chemical class 0.000 description 1
Classifications
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
-
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4611—Fluid flow
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】原水に含まれる硝酸性イオン
を電極反応によって還元除去していく技術分野に属す
る。The present invention belongs to the technical field of reducing and removing nitrate ions contained in raw water by an electrode reaction.
【０００２】[0002]
【従来の技術】従来、原水中の硝酸性イオン除去には主
にイオン交換法、逆浸透膜法、生物的脱窒法が用いられ
ていた。2. Description of the Related Art Conventionally, an ion exchange method, a reverse osmosis membrane method, and a biological denitrification method have been mainly used for removing nitrate ions in raw water.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、イオン
交換法、逆浸透膜法では、メンテナンスコストが高く大
量の廃水処理に不向きであり、生物的脱窒法は、年間を
通して安定した除去能力を維持することが難しかった。However, the ion exchange method and the reverse osmosis membrane method have a high maintenance cost and are not suitable for treating a large amount of wastewater, and the biological denitrification method has to maintain a stable removal ability throughout the year. Was difficult.
【０００４】この発明は、電極での界面反応と電極間反
応によって硝酸性イオンを還元除去するものであり、低
いメンテナンスコストと単純な構造な装置を可能にする
ものである。The present invention reduces and removes nitrate ions by an interfacial reaction and an interelectrode reaction at the electrodes, and enables a low maintenance cost and a simple device.
【０００５】[0005]
【課題を解決するための手段】本発明は、硝酸性イオン
を含有する原水が陽極室から流入し、電場室を経て、陰
極室を通過する過程で、原水はＯＲＰを下げ、陰極室で
陽極からの影響を受けることなく陰極反応を起こし、こ
こで硝酸性イオンは還元され除去される。According to the present invention, the raw water containing nitrate ions flows from the anode chamber, passes through the electric field chamber, and passes through the cathode chamber. A cathodic reaction takes place without being affected by water, where nitrate ions are reduced and removed.
【０００６】[0006]
【発明の作用】硝酸性イオンを含有する原水は陽極室、
電場室、陰極室の順で通過する。The raw water containing nitrate ions is supplied to the anode chamber,
It passes in the order of the electric field room and the cathode room.
【０００７】陽極と陰極が対面する電場室で原水のＯＲ
Ｐは−２００ｍＶ前後まで低下し電子リッチ状態とな
る。[0007] OR of raw water in the electric field room where the anode and cathode face
P drops to about -200 mV and becomes an electron rich state.
【０００８】電子リッチ状態のまま陰極室に流入した原
水は陰極反応によって発生した水素イオンと電子とでそ
の中の硝酸性イオンを還元する。The raw water flowing into the cathode chamber in an electron-rich state reduces nitrate ions therein by hydrogen ions and electrons generated by the cathode reaction.
【０００９】この反応は陰極室内で起きるため、陽極の
酸化作用を受けずに硝酸性イオンを還元除去しながら流
出する。Since this reaction takes place in the cathode chamber, the nitrate ions flow out while being reduced and removed without being oxidized by the anode.
【００１０】[0010]
【発明の実施例】図１が、本発明の基本概念である。FIG. 1 shows the basic concept of the present invention.
【００１１】[0011]
【発明の効果】工業廃水、農業廃水の硝酸性イオンが体
内に入り込むと、硝酸性イオンは血液中のヘモグロビン
と結合し酸素欠乏症を引き起こしたり、強力な発癌性物
質であるニトロソアミン類の生成にも関与する。年々そ
の濃度を増しているにも係わらず除去方法が限られてい
たため対策が遅れていたが、本発明の実用化装置を工業
廃水、農業廃水の配管途中に設置することで硝酸性イオ
ンを除去することが可能になる。Industrial Applicability When nitrate ions in industrial wastewater and agricultural wastewater enter the body, nitrate ions combine with hemoglobin in the blood to cause oxygen deficiency and to form nitrosamines, which are powerful carcinogens. Involved. Although the concentration was increasing year by year, the removal method was limited due to the limited removal method.However, removing the nitrate ions by installing the practical application device of the present invention in the piping of industrial wastewater and agricultural wastewater It becomes possible to do.
【図１】本発明の基本概念を示す。 １：原水流入 ２：陽極 ３：陽極室 ４：電場室 ５：陰極 ６：陰極室 ７：硝酸性イオンが除去された処理水流出FIG. 1 shows the basic concept of the present invention. 1: Inflow of raw water 2: Anode 3: Anode chamber 4: Electric field chamber 5: Cathode 6: Cathode chamber 7: Outflow of treated water from which nitrate ions have been removed
Claims (1)
及び陰極室、陽極室と陰極室の間に電場室、これら３室
を有し、硝酸性イオンを含有する原水は陽極室→電場室
→陰極室の順で流れ、原水は陽極室で電極反応を受け、
電場室で原水の酸化還元電位（以下“ＯＲＰ”と呼ぶ）
を下げ、次の陰極室を通過する過程で陰極での電極反応
によって硝酸性イオンを還元除去することを特長とする
硝酸性イオンの除去法。1. An anode chamber and a cathode chamber each composed of an electrode to which a voltage is applied, an electric field chamber between the anode chamber and the cathode chamber, and these three chambers. The electric field chamber → the cathode chamber flows in this order, the raw water undergoes an electrode reaction in the anode chamber,
Oxidation-reduction potential of raw water in an electric field room (hereinafter referred to as "ORP")
A nitrate ion is reduced and removed by an electrode reaction at the cathode in the process of passing through the next cathode chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000305490A JP2002066555A (en) | 2000-08-31 | 2000-08-31 | Method for removing nitrate ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000305490A JP2002066555A (en) | 2000-08-31 | 2000-08-31 | Method for removing nitrate ions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002066555A true JP2002066555A (en) | 2002-03-05 |
Family
ID=18786338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000305490A Pending JP2002066555A (en) | 2000-08-31 | 2000-08-31 | Method for removing nitrate ions |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002066555A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499025A (en) * | 2012-02-03 | 2013-08-07 | Nat Nuclear Lab Ltd | Decontamination of a system and treatment of the spent decontamination fluid |
| CN116062842A (en) * | 2021-10-29 | 2023-05-05 | 中国石油化工股份有限公司 | A kind of metal alloy electrode and its preparation method and application |
-
2000
- 2000-08-31 JP JP2000305490A patent/JP2002066555A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499025A (en) * | 2012-02-03 | 2013-08-07 | Nat Nuclear Lab Ltd | Decontamination of a system and treatment of the spent decontamination fluid |
| CN116062842A (en) * | 2021-10-29 | 2023-05-05 | 中国石油化工股份有限公司 | A kind of metal alloy electrode and its preparation method and application |
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