JP2001096294A - Device for removing nitrogen oxide - Google Patents
Device for removing nitrogen oxideInfo
- Publication number
- JP2001096294A JP2001096294A JP28112599A JP28112599A JP2001096294A JP 2001096294 A JP2001096294 A JP 2001096294A JP 28112599 A JP28112599 A JP 28112599A JP 28112599 A JP28112599 A JP 28112599A JP 2001096294 A JP2001096294 A JP 2001096294A
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- Prior art keywords
- water
- treated
- fixed bed
- treated water
- nitrogen
- 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.)
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、硝酸性窒素や亜硝
酸性窒素（本明細書ではこれらを総称して酸化態窒素と
いう）を含んだ地下水、河川、湖沼、下水２次処理水な
どから窒素除去を行なう固定床式窒素除去装置に係わ
り、ろ過を効率良く行なうことができる酸化態窒素除去
装置に関する。TECHNICAL FIELD The present invention relates to groundwater, rivers, lakes, marshes, secondary sewage and the like containing nitrate nitrogen and nitrite nitrogen (these are collectively referred to as oxide nitrogen). The present invention relates to a fixed bed type nitrogen removing device for removing nitrogen, and to an oxidized nitrogen removing device capable of performing filtration efficiently.
【０００２】[0002]
【従来の技術】従来、硝酸性窒素を含んだ地下水、河川
水、下水２次処理水などから、脱窒菌（通性嫌気性菌）
を利用し、脱窒菌の水素供与体としてメタノールなど添
加して生物学的に脱窒をする方法が一般的に知られてい
る。しかし、この生物学的脱窒方法では運転中、常にメ
タノールの添加が必要であるので、運転経費が高くな
る。2. Description of the Related Art Conventionally, denitrifying bacteria (facultative anaerobic bacteria) are obtained from groundwater, river water, sewage secondary treated water, etc. containing nitrate nitrogen.
There is generally known a method of biologically denitrifying by utilizing methanol and adding methanol or the like as a hydrogen donor of denitrifying bacteria. However, in this biological denitrification method, since the addition of methanol is always required during operation, the operation cost is high.
【０００３】生物学的脱窒方法に関して、特開平９−２
９２８２号の公報には、嫌気条件下で生物学的に脱窒処
理する際に、還元剤として硫黄を使用して脱窒処理し、
膜分離で処理水を得ると記載されている。この方法は、
高価な膜分離装置が必要である。また、特公平４−９１
１９号の公報には、水素供与体として硫黄粒を用い脱窒
を行っていると記載されている。この方法は、固液分離
の工程を必要とする。[0003] Regarding the biological denitrification method, Japanese Patent Laid-Open Publication No. 9-2
No. 9282 discloses that when biologically denitrifying under anaerobic conditions, denitrification using sulfur as a reducing agent,
It is described that treated water is obtained by membrane separation. This method
An expensive membrane separation device is required. In addition, Tokuhei 4-91
No. 19 describes that denitrification is performed using sulfur particles as a hydrogen donor. This method requires a solid-liquid separation step.
【０００４】生物学的に窒素除去をするための装置とし
て、前記特開平９−２９２８２号の公報では図６に示す
装置が使用され、また特公平４−９１１９号の公報では
図５に示すような装置が使用されている。As an apparatus for biologically removing nitrogen, the apparatus shown in FIG. 6 is used in Japanese Patent Application Laid-Open No. 9-29282, and as shown in FIG. 5 in Japanese Patent Application Publication No. 4-9-1119. Equipment is used.
【０００５】即ち、図６に示す装置は、原水タンク３２
から嫌気槽３１に送られた被処理水に対して、該被処理
水中の硝酸態窒素を嫌気条件下で生物学的脱窒処理する
に際し、還元剤として硫黄を使用し、脱窒処理された被
処理水を膜分離装置３０で固液分離することを特徴とす
る。なお、嫌気槽３１には、ＮａＯＨタンク３３、ｐＨ
コントローラ３４、恒温装置３５及び撹拌装置が接続し
てあって、生物学的脱窒処理の条件を定める。That is, the apparatus shown in FIG.
Is subjected to biological denitrification treatment of nitrate nitrogen in the treated water under anaerobic conditions by using sulfur as a reducing agent and subjected to denitrification treatment. It is characterized in that the water to be treated is solid-liquid separated by the membrane separation device 30. The anaerobic tank 31 contains a NaOH tank 33, pH
The controller 34, the thermostat 35 and the stirring device are connected to determine the conditions of the biological denitrification treatment.
【０００６】図５に示す装置は、直列に接続された最初
沈殿池２１、好気槽２２、密閉嫌気脱窒槽２３、最終沈
殿槽２４を有し、被処理水を第１固液分離工程の最初沈
殿池２１に供給し浮遊物を除去した後、固液分離処理水
を硝化工程の好気槽２２に供給し、好気槽２２中でＢＯ
Ｄ成分が除去され、窒素成分は好気槽２２中で硝化さ
れ、次いで脱窒工程の密閉嫌気脱窒槽２３へ供給され、
脱窒除去する。なお、嫌気脱窒槽の底部には１０〜１０
０ｍｍの粒径の硫黄粒が敷きつめられている。また、沈
殿槽２４の底部には、カバー部材２６、ノズル２７、ガ
ス循環路２８を設けた汚泥脱燐濃縮槽２５が、接続され
ている。The apparatus shown in FIG. 5 has a first sedimentation tank 21, an aerobic tank 22, a closed anaerobic denitrification tank 23, and a final sedimentation tank 24 connected in series. After first supplying the sedimentation basin 21 to remove suspended matter, the solid-liquid separation treatment water is supplied to the aerobic tank 22 in the nitrification step, and
The D component is removed, the nitrogen component is nitrified in the aerobic tank 22, and then supplied to the closed anaerobic denitrification tank 23 in the denitrification step,
Denitrification removal. The bottom of the anaerobic denitrification tank is 10 to 10
Sulfur particles having a particle size of 0 mm are laid. A sludge dephosphorization / concentration tank 25 provided with a cover member 26, a nozzle 27, and a gas circulation path 28 is connected to the bottom of the settling tank 24.
【０００７】[0007]
【発明が解決しようとする課題】図６の生物学的脱窒処
理装置の場合、硫黄を還元剤とした脱窒処理で処理され
た排水を膜分離装置３０で固液分離することを必要とし
ている。図５の好気−嫌気活性汚泥処理装置の場合、硫
黄粒を還元剤とする脱窒処理に関する処理において、密
閉嫌気脱窒槽２３と沈殿槽２４と汚泥脱燐濃縮槽２５の
３槽を必要としている。従って、これらの方法では清澄
な脱窒処理水を得るために、膜分離装置あるいは沈殿槽
を設置しなければならず、処理設備が大がかりになり、
建設費や設置面積の増大を招く。また、処理プロセスが
複雑となるので、維持管理が難しく、安定して良好な処
理水を得にくい。In the case of the biological denitrification treatment apparatus shown in FIG. 6, the wastewater treated by the denitrification treatment using sulfur as a reducing agent needs to be solid-liquid separated by the membrane separation apparatus 30. I have. In the case of the aerobic-anaerobic activated sludge treatment apparatus of FIG. 5, three tanks of a closed anaerobic denitrification tank 23, a sedimentation tank 24, and a sludge dephosphorization concentration tank 25 are required in the processing relating to the denitrification treatment using sulfur particles as a reducing agent. I have. Therefore, in these methods, in order to obtain clear denitrification-treated water, a membrane separation device or a sedimentation tank must be installed, and the treatment equipment becomes large.
This leads to an increase in construction costs and installation area. In addition, since the treatment process is complicated, maintenance and management are difficult, and it is difficult to stably obtain good treated water.
【０００８】さらに、被処理水の酸化態窒素の濃度によ
っては安定したｐＨを得ることは難しいという問題があ
った。Further, there is a problem that it is difficult to obtain a stable pH depending on the concentration of oxidized nitrogen in the water to be treated.
【０００９】これらを解決するために、本発明の酸化態
窒素除去装置は、被処理水を、硫黄粒を還元剤として脱
窒処理し、さらに固液分離までを一つの装置とする水処
理装置を提供することを課題とする。In order to solve these problems, the apparatus for removing nitrogen oxides according to the present invention is a water treatment apparatus in which the water to be treated is denitrified by using sulfur particles as a reducing agent, and further comprises solid-liquid separation as one apparatus. The task is to provide
【００１０】[0010]
【課題を解決するための手段】本発明の酸化態窒素除去
装置は、ろ過反応塔と、被処理水流入手段と、処理水流
出手段と、洗浄手段とを有し、該ろ過反応塔内に硫黄粒
を充填した固定床部を備えたことを特徴とする。前記ろ
過反応塔内には、薬品を注入する薬品注入手段を備えた
ことが好ましい。また、前記ろ過反応塔よりの処理水の
一部を、被処理水が流入する側に返送する返送手段を備
えることが好ましい。また、前記ろ過反応塔内にｐＨ緩
衝作用のある固形材を備えることが好ましい。The apparatus for removing oxidized nitrogen of the present invention has a filtration reaction tower, a treated water inflow means, a treated water outflow means, and a washing means. It is characterized by having a fixed bed portion filled with sulfur particles. It is preferable that a chemical injection means for injecting a chemical is provided in the filtration reaction tower. Further, it is preferable that a return means is provided for returning a part of the treated water from the filtration reaction tower to a side into which the water to be treated flows. Further, it is preferable to provide a solid material having a pH buffering action in the filtration reaction tower.
【００１１】[0011]
【発明の実施の形態】本願第１の発明の酸化態窒素除去
装置は、前記課題を解決するための水処理装置としてな
されたもので、水処理装置としての特徴は、図１に示す
ように、ろ過反応塔１に被処理水流入手段３と、処理水
流出手段５と、洗浄手段４とを備え、該ろ過反応塔内
に、硫黄粒を充填した固定床部２を備えているところに
ある。BEST MODE FOR CARRYING OUT THE INVENTION The nitrogen oxide removing apparatus according to the first invention of the present application is made as a water treatment apparatus for solving the above-mentioned problems, and the feature of the water treatment apparatus is as shown in FIG. The filtration reaction tower 1 is provided with a to-be-treated water inflow means 3, a treated water outflow means 5, and a washing means 4, and the filtration reaction tower is provided with a fixed bed portion 2 filled with sulfur particles. is there.
【００１２】すなわち本願第１の発明では、被処理水が
被処理水流入手段３によりろ過反応塔の上部または下部
より（図示の場合は、下部より）流入して、下向流また
は上向流（図示の場合は、上向流）となり、硫黄粒を充
填した固定床部２を通り、硫黄粒酸化細菌による脱窒素
反応を受ける。被処理水は固定床部２を通過する時に懸
濁物質も除去される。こうして、処理水流出手段５から
出る処理水は窒素成分且つ懸濁物質が除去され、清澄な
処理水を得ることができる。That is, in the first invention of the present application, the water to be treated flows from the upper part or the lower part (in the case of the drawing, from the lower part) of the filtration reaction tower by the to-be-treated water inflow means 3, and flows downward or upward. (In the case of the drawing, upward flow) and passes through the fixed bed portion 2 filled with sulfur particles and undergoes a denitrification reaction by sulfur particle oxidizing bacteria. When the water to be treated passes through the fixed bed 2, suspended substances are also removed. In this way, the treated water discharged from the treated water outflow means 5 has the nitrogen component and suspended substances removed, and clear treated water can be obtained.
【００１３】固定床部２には、上記脱窒反応、清澄作用
の他に、生育速度が遅い硫黄酸化細菌を反応塔外に流出
させない働きがあるので、汚泥滞留時間(ＳＲＴ)を十分
とることができる。Since the fixed bed 2 has a function of preventing sulfur-oxidizing bacteria having a slow growth rate from flowing out of the reaction tower in addition to the denitrification reaction and the clarifying action, a sufficient sludge retention time (SRT) is required. Can be.
【００１４】洗浄手段４は、固定床２を流動できれば、
どのような手段でも良く、例えば、窒素ガスの吹き込
み、循環ポンプによる水循環、及び窒素ガスと水循環の
両方などによる。使用する硫黄は、温泉地や石油化学工
場などの廃ガスの脱硫により、きわめて安価に入手でき
る。If the washing means 4 can flow through the fixed bed 2,
Any means may be used, for example, by blowing nitrogen gas, water circulation by a circulation pump, and both nitrogen gas and water circulation. The sulfur used can be obtained at a very low price by desulfurizing waste gas from hot springs and petrochemical plants.
【００１５】図２に示す本願第２の発明の酸化態窒素除
去装置１は、図１の装置に、薬品注入手段６を設けたこ
とを特徴とする。すなわち、酸化態窒素が多く流入した
場合、硫黄酸化細菌により前記ろ過反応塔内の硫黄粒が
酸化され、硫酸イオンが多く生成されるのに備え、ｐＨ
調整のための薬品、例えば、炭酸カルシウムを注入す
る。A second embodiment of the present invention shown in FIG. 2 is characterized in that a chemical injection means 6 is provided in the apparatus shown in FIG. That is, when a large amount of oxidized nitrogen flows in, sulfur particles in the filtration reaction tower are oxidized by sulfur oxidizing bacteria, and a large amount of sulfate ions are prepared in preparation for pH.
Inject chemicals for conditioning, for example, calcium carbonate.
【００１６】図３に示す本願第３の発明の酸化態窒素除
去装置は、図１の装置に、ろ過反応塔の上部と下部を連
通する返送手段７を設けたことを特徴とする。固定床部
２が汚泥等で目詰まりして流れが悪化した場合に、充填
材の硫黄粒（固定材を備えていれば固形材も）を流動す
ると処理水の懸濁物質が増加するので、上向流の場合な
ら、該処理水の一部を被処理水流入手段のある下部、下
向流の場合なら、被処理水流入手段のある上部に返送す
ることで、充填材の流動直後の処理水質を良好に保つこ
とができる。また、定量運転で反応が不十分な場合に対
応する事もできる。The apparatus for removing oxides of nitrogen according to the third aspect of the present invention shown in FIG. 3 is characterized in that the apparatus shown in FIG. 1 is provided with a return means 7 for communicating the upper part and the lower part of the filtration reaction tower. When the fixed bed 2 is clogged with sludge or the like and the flow is deteriorated, the suspended matter of the treated water increases when the sulfur particles of the filler (and the solid material if the fixed material is provided) flow. In the case of the upward flow, a part of the treated water is returned to the lower part having the treated water inflow means, and in the case of the downward flow, the treated water is returned to the upper part having the treated water inflow means. The treated water quality can be kept good. Further, it is possible to cope with a case where the reaction is insufficient in the quantitative operation.
【００１７】図４に示す第４の発明の酸化態窒素除去装
置は、装置構成は図１のものと同様であるが、ろ過反応
塔（図示の場合は固定床部）にｐＨ緩衝作用材、例え
ば、炭酸カルシウム８（図示の場合）、大理石、牡蠣殻
などを存在させている。これにより、酸化態窒素の濃度
変化により、硫黄酸化細菌により生成される硫酸イオン
が変化することに対応するｐＨ緩衝作用とともに、硫黄
酸化細菌の保持作用、懸濁物質の捕捉作用を強化してい
る。The apparatus for removing oxidized nitrogen according to the fourth invention shown in FIG. 4 has the same structure as that of FIG. 1, except that a filtration buffer (fixed bed in the illustrated case) is provided with a pH buffering material, For example, calcium carbonate 8 (in the case shown), marble, oyster shell, and the like are present. This enhances the retention of sulfur oxidizing bacteria and the trapping of suspended solids, as well as a pH buffering action corresponding to the change in sulfate ions produced by sulfur oxidizing bacteria due to a change in the concentration of oxidized nitrogen. .
【００１８】（実施例）以下、本発明の一実施例につい
て説明する。(Embodiment) An embodiment of the present invention will be described below.
【００１９】図１の酸化態窒素除去装置を用いて、被処
理水として下水２次処理水の硝酸イオン、亜硝酸イオン
を除去成分として、上向流で運転を行った。なお、本実
施例では、上向流で行ったが、硫黄酸化細菌の保持作
用、懸濁物質の捕捉作用の効果が得られるなら、上向流
で運転することにとらわれず、下向流で運転することも
できる。Using the apparatus for removing oxidized nitrogen shown in FIG. 1, operation was performed in an upward flow using nitrate ions and nitrite ions as secondary components of sewage secondary treatment water as components to be treated. In the present embodiment, the operation was performed in the upward flow.However, if the effect of retaining the sulfur-oxidizing bacteria and the effect of trapping the suspended matter can be obtained, the operation is not limited to the operation in the upward flow, and the operation is performed in the downward flow. You can also drive.
【００２０】ろ過反応塔１（寸法：φ７４ｍｍ×１３０
０ｍｍ）に、固定床部２の充填ろ材として約２ｍｍの硫
黄粒を６００ｍｍ充填した。ろ過速度は２５ｍ／日とし
た。前記固定床下部を支持する部分は水溶性の材料以外
はどのような材料でも良いが、本実施例では塩化ビニー
ルに充填ろ材の平均径より小さい穴を開けて用いた。前
記洗浄手段は、窒素ガスの吹き込みの手段で固定床部を
流動して行った。Filtration reaction tower 1 (dimensions: φ74 mm × 130)
0 mm) was filled with 600 mm of sulfur particles of about 2 mm as a filter medium for filling the fixed bed 2. The filtration speed was 25 m / day. The portion for supporting the lower part of the fixed bed may be made of any material other than the water-soluble material. In this embodiment, a hole smaller than the average diameter of the filling filter material was formed in vinyl chloride. The cleaning means was carried out by flowing the fixed bed part by means of blowing nitrogen gas.
【００２１】被処理水流入手段３に流入する被処理水の
硝酸イオン濃度は４０ｍｇ／Ｌで、懸濁物質濃度は１５
ｍｇ／Ｌであった。The nitrate ion concentration of the water to be treated flowing into the treated water inflow means 3 is 40 mg / L, and the concentration of suspended solids is 15 mg / L.
mg / L.
【００２２】ろ過反応塔１で処理を行ったあと、処理水
流出手段５から出る処理水に硝酸イオンは検出されなか
った。すなわち、硝酸イオンの除去率は１００％となっ
た。また、同処理水の懸濁物質濃度は３ｍｇ／Ｌであっ
た。After the treatment in the filtration reaction tower 1, no nitrate ion was detected in the treated water discharged from the treated water outflow means 5. That is, the removal rate of nitrate ions became 100%. The suspended solids concentration of the treated water was 3 mg / L.
【００２３】被処理水は、固定床部を通る際、硫黄酸化
細菌の還元作用を受け、且つ固定床部に充填した硫黄粒
のろ過作用を受けた結果、処理水は良好な水質となっ
た。When the water to be treated passes through the fixed bed, it undergoes a reducing action of sulfur oxidizing bacteria and a filtering action of the sulfur particles filled in the fixed bed, so that the treated water has good water quality. .
【００２４】（比較例）図５に示す従来の水処理装置で
処理を行った場合に、被処理水の硝酸イオン濃度は４４
ｍｇ／Ｌで、処理水の硝酸イオンは８．６ｍｇ／Ｌで除
去率８０％であった。この従来装置に比較して、本発明
の装置で、より良好な処理水質が得られたことがわか
る。(Comparative Example) When the treatment was performed with the conventional water treatment apparatus shown in FIG.
The nitrate ion of the treated water was 8.6 mg / L, and the removal rate was 80%. It can be seen that better treated water quality was obtained with the apparatus of the present invention as compared with the conventional apparatus.
【００２５】[0025]
【発明の効果】本発明は、被処理水を、硫黄粒を還元剤
として脱窒処理し、さらに固液分離までを一つの装置と
することを可能とした。本発明の酸化態窒素除去装置に
よれば、処理された排水を膜分離装置で固液分離するこ
とや、沈殿槽を設置する必要がなくなり、処理設備がコ
ンパクト化でき、建設費や設置面積の削減がはかれ、さ
らに、単純な処理プロセスであるため、運転管理が容易
であり、安定した良好な処理が行えると共に維持管理等
の費用を低減することができるという効果が得られる。
また、被処理水が上向流または下向流として、固形硫黄
粒を充填した固定床部を通る際、硫黄酸化細菌による脱
窒素反応を受けるだけでなく、懸濁物質も除去され、処
理水は窒素成分が除去され、且つ清澄な処理水を得こと
ができるという効果が得られる。さらに、硫黄粒の充填
ろ材は、生育速度が遅い硫黄酸化細菌を反応塔外に流出
しないようにして、汚泥滞留時間(ＳＲＴ)を十分とるこ
とができるという効果が得られる。また、ｐＨ緩衝作用
材も同様の硫黄酸化細菌の保持作用、懸濁物質の捕捉作
用を強化するという効果が得られる。According to the present invention, it is possible to perform denitrification treatment of water to be treated using sulfur particles as a reducing agent, and further to perform solid-liquid separation as one apparatus. ADVANTAGE OF THE INVENTION According to the oxidized nitrogen removal apparatus of this invention, it becomes unnecessary to separate the treated waste water with a membrane separation apparatus and to install a sedimentation tank, the processing equipment can be made compact, the construction cost and the installation area can be reduced. Since the reduction is achieved and the processing is simple, the operation management is easy, stable and good processing can be performed, and the cost of maintenance and the like can be reduced.
In addition, when the water to be treated passes through the fixed bed filled with solid sulfur particles as an upward flow or a downward flow, not only is the denitrification reaction caused by sulfur-oxidizing bacteria, but also suspended substances are removed, and the treated water is removed. Has an effect that a nitrogen component is removed and clear treated water can be obtained. Further, the filter medium filled with sulfur particles has an effect that a sludge retention time (SRT) can be sufficiently secured by preventing sulfur-oxidizing bacteria having a slow growth rate from flowing out of the reaction tower. In addition, the pH buffering material has the same effect of enhancing the retention of sulfur-oxidizing bacteria and the trapping of suspended substances.
【００２６】ｐＨ調整のための薬品注入やｐＨ緩衝作用
材により、安定した良好な処理ができるという効果が得
られる。The effect of stable and good treatment can be obtained by injecting a chemical for pH adjustment or a pH buffering material.
【００２７】返送手段を用いた場合、処理水の一部を被
処理水の流入側に返送することで、充填材の流動直後の
処理水質を良好に保つという効果も得られる。When the return means is used, by returning a part of the treated water to the inflow side of the treated water, it is possible to obtain the effect of maintaining the quality of the treated water immediately after the flow of the filler.
【図１】 本発明の一実施例に対応した酸化態窒素除去
装置の概略縦断面図。FIG. 1 is a schematic longitudinal sectional view of an apparatus for removing nitrogen oxides according to an embodiment of the present invention.
【図２】 本発明の他の実施例に対応した酸化態窒素除
去装置の概略縦断面図。FIG. 2 is a schematic longitudinal sectional view of an oxidized nitrogen removing apparatus according to another embodiment of the present invention.
【図３】 本発明の他の実施例に対応した酸化態窒素除
去装置の概略縦断面図。FIG. 3 is a schematic longitudinal sectional view of an oxidized nitrogen removing apparatus according to another embodiment of the present invention.
【図４】 本発明の他の実施例に対応した酸化態窒素除
去装置の概略縦断面図。FIG. 4 is a schematic longitudinal sectional view of an oxidized nitrogen removing apparatus according to another embodiment of the present invention.
【図５】 従来の水処理装置のフロー図。FIG. 5 is a flowchart of a conventional water treatment apparatus.
【図６】 従来の水処理装置の他の例の縦断面図。FIG. 6 is a longitudinal sectional view of another example of the conventional water treatment apparatus.
１ ろ過反応塔 ２ 固定床部 ３ 被処理水流入手段 ４ 洗浄手段 ５ 処理水流出手段 ６ 薬品注入手段 ７ 返送手段 ８ 炭酸カルシウム ２１ 最初沈殿池 ２２ 好気槽 ２３ 密閉嫌気脱窒槽 ２４ 沈殿槽 ２５ 汚泥脱燐濃縮槽 ２６ カバー部材 ２７ ノズル ２８ ガス循環路 ３０ 膜分離装置 ３１ 嫌気槽 ３２ 原水タンク ３３ ＮａＯＨタンク ３４ ｐＨコントローラ ３５ 恒温装置 DESCRIPTION OF SYMBOLS 1 Filtration reaction tower 2 Fixed bed part 3 Treated water inflow means 4 Washing means 5 Treated water outflow means 6 Chemical injection means 7 Return means 8 Calcium carbonate 21 First sedimentation tank 22 Aerobic tank 23 Closed anaerobic denitrification tank 24 Sedimentation tank 25 Sludge Dephosphorization concentration tank 26 Cover member 27 Nozzle 28 Gas circulation path 30 Membrane separation device 31 Anaerobic tank 32 Raw water tank 33 NaOH tank 34 pH controller 35 Constant temperature device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金岡 欣輝 東京都世田谷区玉堤１丁目28番１号 武蔵 工業大学内 (72)発明者 松岡 賢司 東京都世田谷区玉堤１丁目28番１号 武蔵 工業大学内 Ｆターム(参考） 4D040 DD01 DD14 DD31 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kinki Kanaoka 1-228-1, Tamatsutsumi, Setagaya-ku, Tokyo Musashi Institute of Technology (72) Inventor Kenji Matsuoka 1-228-1, Tamazumi, Setagaya-ku, Tokyo Musashi Kogyo University F term (reference) 4D040 DD01 DD14 DD31
Claims (4)
理水流出手段と、洗浄手段とを有する酸化態窒素除去装
置において、該ろ過反応塔内に硫黄粒を充填した固定床
部を備えたことを特徴とする酸化態窒素除去装置。1. An apparatus for removing nitrogen oxides having a filtration reaction tower, a treated water inflow means, a treated water outflow means, and a washing means, wherein a fixed bed portion filled with sulfur particles in the filtration reaction tower is provided. An apparatus for removing oxidized nitrogen, comprising:
注入手段を備えたことを特徴とする請求項１に記載の酸
化態窒素除去装置。2. The apparatus according to claim 1, further comprising a chemical injection means for injecting a chemical into the filtration reaction tower.
部を、被処理水が流入する側に返送する返送手段を備え
たことを特徴とする請求項１または請求項２に記載の酸
化態窒素除去装置。3. The oxidation according to claim 1, further comprising a return means for returning a part of the treated water flowing out of the filtration reaction tower to a side into which the water to be treated flows. Nitrogen removal equipment.
固形材を備えたことを特徴とする請求項１から請求項３
のいずれかに記載の酸化態窒素除去装置。4. The filtration reaction tower according to claim 1, further comprising a solid material having a pH buffering action.
The oxidized nitrogen removing device according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28112599A JP2001096294A (en) | 1999-10-01 | 1999-10-01 | Device for removing nitrogen oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28112599A JP2001096294A (en) | 1999-10-01 | 1999-10-01 | Device for removing nitrogen oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001096294A true JP2001096294A (en) | 2001-04-10 |
Family
ID=17634722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28112599A Pending JP2001096294A (en) | 1999-10-01 | 1999-10-01 | Device for removing nitrogen oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001096294A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002159993A (en) * | 2000-11-27 | 2002-06-04 | Nitchitsu Co Ltd | Nitric acid removal treatment equipment |
| JP2006122771A (en) * | 2004-10-27 | 2006-05-18 | Chuden Kankyo Technos Co Ltd | Fluid treatment method and fluid treatment system |
| KR101184168B1 (en) * | 2010-04-05 | 2012-09-18 | 대림산업 주식회사 | Sulfur Autotrophic Denitrification Tower Apparatus for Nitrogen Gas Emission |
| JP2016087549A (en) * | 2014-11-05 | 2016-05-23 | 株式会社Ihi | Denitrification apparatus |
-
1999
- 1999-10-01 JP JP28112599A patent/JP2001096294A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002159993A (en) * | 2000-11-27 | 2002-06-04 | Nitchitsu Co Ltd | Nitric acid removal treatment equipment |
| JP4560810B2 (en) * | 2000-11-27 | 2010-10-13 | 株式会社ニッチツ | Nitrate ion removal equipment |
| JP2006122771A (en) * | 2004-10-27 | 2006-05-18 | Chuden Kankyo Technos Co Ltd | Fluid treatment method and fluid treatment system |
| KR101184168B1 (en) * | 2010-04-05 | 2012-09-18 | 대림산업 주식회사 | Sulfur Autotrophic Denitrification Tower Apparatus for Nitrogen Gas Emission |
| JP2016087549A (en) * | 2014-11-05 | 2016-05-23 | 株式会社Ihi | Denitrification apparatus |
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