JP3148498B2 - Treatment of wastewater containing ammonia - Google Patents
Treatment of wastewater containing ammoniaInfo
- Publication number
- JP3148498B2 JP3148498B2 JP01772394A JP1772394A JP3148498B2 JP 3148498 B2 JP3148498 B2 JP 3148498B2 JP 01772394 A JP01772394 A JP 01772394A JP 1772394 A JP1772394 A JP 1772394A JP 3148498 B2 JP3148498 B2 JP 3148498B2
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- waste liquid
- activated carbon
- gas
- treatment
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Treating Waste Gases (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アンモニア含有廃液の
処理法に係り、特に、アンモニア及び／又はその塩を製
造又は使用する工業の廃液、又は化学洗浄に使用される
アンモニア又はその塩を含む洗浄廃液の処理法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating ammonia-containing waste liquor, and more particularly to an industrial waste liquor for producing or using ammonia and / or a salt thereof, or ammonia or a salt thereof used for chemical cleaning. The present invention relates to a method for treating washing waste liquid.
【０００２】[0002]
【従来の技術】アンモニア及び／又はその塩は金属表面
に付着した銅スケールや各種の金属酸化物スケールの除
去を目的とする洗浄剤としてや、金属表面の錆の発生を
抑制することを目的とする防錆剤、保管剤として広く一
般に使用されている。洗浄後あるいは防錆後に排出され
る廃液にはアンモニアが含まれている。この廃液を排出
するに当っては、富栄養化の一つの原因物質であるアン
モニアを除去することが必要である。従来アンモニアを
含有する液の処理には、以下に示す手段が採られてい
る。 アンモニアストリッピング法により、アンモニアを
大気に放散させる方法、 硝化菌、脱窒素菌等の微生物によって分解する方
法、 ＲＯ（逆浸透膜）を用いて濃縮処理する方法、 塩素により分解する方法、等がある。2. Description of the Related Art Ammonia and / or its salts are used as a cleaning agent for removing copper scale and various metal oxide scales adhering to a metal surface, and for suppressing generation of rust on a metal surface. It is widely and widely used as a rust preventive and storage agent. The waste liquid discharged after washing or rust prevention contains ammonia. In discharging this waste liquid, it is necessary to remove ammonia, which is one of the causes of eutrophication. Conventionally, the following means have been employed for treating a liquid containing ammonia. Ammonia stripping by ammonia stripping method to the atmosphere, decomposing by microorganisms such as nitrifying bacteria and denitrifying bacteria, concentrating using RO (reverse osmosis membrane), decomposing by chlorine, etc. is there.
【０００３】このような処理方法においては、それぞれ
次のような問題点があった。の場合、アンモニアは大
気に放散させるため、放散されたアンモニアを回収する
装置が必要となる。また、処理日数を要する。の場
合、微生物の培養、装置設備費用の問題があり、非定常
廃液の処理としては実際的でない。の場合、比較的簡
単にアンモニアを処理できるが、液の種類や、液中の塩
類濃度が高い場合、処理が困難となる。の場合、現状
で実施可能な方法であるが、反応の完結が遅いため、処
理装置、設備が大きくなり、また処理時間が長いなど負
荷が大きくなる。また、、の方法では、アンモニア
は分解されないので、根本的な解決にはならず、二次処
理が必要である。[0003] Such processing methods have the following problems. In the case of (1), since ammonia is released to the atmosphere, a device for collecting the released ammonia is required. Further, it takes a number of processing days. In this case, there is a problem of culturing microorganisms and equipment costs, and it is not practical as a treatment for unsteady waste liquid. In the case of (1), ammonia can be treated relatively easily, but if the type of liquid or the concentration of salts in the liquid is high, the treatment becomes difficult. In this case, the method can be carried out at present, but the completion of the reaction is slow, so that the processing apparatus and equipment are increased, and the load is increased due to a long processing time. Further, in the method (1), ammonia is not decomposed, so that it is not a fundamental solution, and a secondary treatment is required.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点を解消し、アンモニア及び／又はその塩に起
因する窒素を１０ｍｇ／リットル以下に処理し、しか
も、コンパクトな装置で連続的な処理を短時間で可能に
する処理法を提供することを課題とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, treats nitrogen caused by ammonia and / or its salt to 10 mg / liter or less, and continuously operates with a compact apparatus. It is an object of the present invention to provide a processing method that enables efficient processing in a short time.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、アンモニア及び／又はその塩を含有す
る廃液から窒素分を分解除去するに際し、該廃液に、含
有アンモニア分に対して当量以上の塩素を添加してか
ら、活性炭を触媒としてアンモニアを分解処理し、該処
理によって遊離したアンモニアガス及び塩素ガスを含む
廃ガスを、活性炭と接触させることを特徴とするアンモ
ニア含有廃液の処理法としたものである。In order to solve the above-mentioned problems, according to the present invention, when nitrogen is decomposed and removed from a waste liquid containing ammonia and / or a salt thereof, the waste liquid is treated with respect to the contained ammonia. After adding an equivalent or more of chlorine, ammonia is decomposed using activated carbon as a catalyst ,
Including ammonia gas and chlorine gas released by processing
The waste gas is obtained by the treatment of ammonia-containing waste liquid, characterized in Rukoto is contacted with activated carbon.
【０００６】上記処理法において、廃液中のアンモニア
分が高濃度の際は、該廃液をまず塩素のみによる処理で
大部分のアンモニア分を除去した後、残りのアンモニア
分を活性炭を触媒として分解処理するのがよく、また、
廃液は、塩素添加の前に、アンモニアの分解除去後のｐ
Ｈがアルカリ性、好ましくはｐＨ９．０以上を呈するよ
うにｐＨを調整しておくのがよい。また、本発明では、
前記アンモニア含有廃液の処理法によって、廃ガス中の
アンモニア及び塩素ガスを分解あるいは吸着除去するこ
とができる。 In the above treatment method, when the ammonia content in the waste liquid is high, the waste liquid is first treated with only chlorine to remove most of the ammonia content, and then the remaining ammonia content is decomposed using activated carbon as a catalyst. It is better to
The effluent is treated with p after decomposition and removal of ammonia before chlorine addition.
It is preferable to adjust the pH so that H exhibits alkaline, preferably pH 9.0 or higher. In the present invention,
By treatment of the ammonia-containing waste liquid, this decomposing or adsorbing and removing ammonia and chlorine gas in the waste gas
Can be.
【０００７】上記のように、本発明では、アンモニア及
び／又はその塩を含有する廃液を処理するに際し、該廃
液の処理後のｐＨが９以上を保つようにｐＨを調整した
のち塩素と活性炭を用いてアンモニアを分解し、アンモ
ニアの窒素を窒素ガスとして除去する。また、対象とす
る廃液のアンモニア濃度が、数百ｍｇ／リットル程度で
あれば、該廃液に塩素を添加しながら活性炭槽を通す一
段処理によって、アンモニアの分解を速やかに行うこと
ができるが、数千ｍｇ／リットルと高い場合は、ｐＨ調
整した後、廃液に塩素を連続的に添加しながら活性炭を
充填していない槽で大部分のアンモニアを分解した後、
引き続き活性炭槽を通す二段処理を行うことで反応を速
やかに完結され連続処理が可能になる。廃液の処理で
は、いかに低い値に速く到達するかが処理の効果に大き
く影響する。As described above, in the present invention, when treating a waste liquid containing ammonia and / or its salt, the pH is adjusted so that the pH after the treatment of the waste liquid is 9 or more, and then chlorine and activated carbon are removed. To decompose ammonia and remove ammonia nitrogen as nitrogen gas. If the target waste liquid has an ammonia concentration of about several hundred mg / liter, the ammonia can be decomposed quickly by a single-stage treatment through an activated carbon tank while adding chlorine to the waste liquid. If the concentration is as high as 1,000 mg / liter, after adjusting the pH, most of the ammonia is decomposed in a tank not filled with activated carbon while continuously adding chlorine to the waste liquid,
Successive two-stage treatment through an activated carbon tank allows the reaction to be completed quickly and enables continuous treatment. In the treatment of waste liquid, how quickly it reaches a low value has a great effect on the effect of the treatment.
【０００８】次に、本発明を工程図を用いて詳細に説明
する。本発明のアンモニア及び／又はその塩を含有する
廃液のアンモニア濃度が数百ｍｇ／リットル程度の場
合、図１に示すように、予めアルカリでｐＨ調整した被
処理液１はポンプ６にて、塩素２はポンプ７にて、同時
に、予め求めてある流量比にて混合し活性炭槽３へ送
り、活性炭の触媒作用によりアンモニアを速やかに分解
させる。系内の気相部分には、未反応の塩素ガスとアン
モニアガスが存在するが、これを、活性炭槽５に導くこ
とで、アンモニアガスは、塩素ガスと反応し窒素ガスと
なり、さらに余剰の塩素ガスは活性炭で吸着され、排ガ
スの処理も同時に行うよう構成したものである。Next, the present invention will be described in detail with reference to process drawings. When the ammonia concentration of the waste liquid containing ammonia and / or a salt thereof according to the present invention is about several hundred mg / liter, as shown in FIG. 2 is mixed by a pump 7 at the same time at a previously determined flow ratio and sent to the activated carbon tank 3, where ammonia is rapidly decomposed by the catalytic action of the activated carbon. Unreacted chlorine gas and ammonia gas are present in the gas phase in the system. By introducing this gas into the activated carbon tank 5, the ammonia gas reacts with the chlorine gas to become nitrogen gas, and further excess chlorine gas. The gas is adsorbed by activated carbon, and the exhaust gas is treated at the same time.
【０００９】また、アンモニアの濃度が数千ｍｇ／リッ
トルと高い場合は、図２に示すように、予めアルカリで
調整した被処理液１はポンプ６にて、塩素２はポンプ７
にて、同時に予め求めてある流量比で混合したのち、第
１反応槽８へ送り、ここでまず大部分のアンモニアを分
解し、引き続きポンプ９にて活性炭反応槽３へ送り、ア
ンモニアを完全に分解するよう構成したものである。When the concentration of ammonia is as high as several thousand mg / liter, as shown in FIG.
At the same time, after mixing at a previously determined flow ratio, the mixture is sent to the first reaction tank 8, where most of the ammonia is first decomposed, and then sent to the activated carbon reaction tank 3 by the pump 9 to completely remove the ammonia. It is configured to be disassembled.
【００１０】アンモニアの分解に供する塩素は、塩素ガ
ス、次亜塩素酸ナトリウム、その他の次亜塩素酸塩等が
あるが、有効塩素を持つものであれば特に限定されるも
のではない。第１反応槽と、活性炭反応槽での液の滞留
時間は、それぞれ８〜１０分程度が望ましく、それ以下
ではアンモニアが完全に分解されないまま通過する割合
が多くなる。使用する活性炭は、触媒として作用するの
で繰り返し使用可能である。The chlorine used for the decomposition of ammonia includes chlorine gas, sodium hypochlorite, and other hypochlorites, but is not particularly limited as long as it has available chlorine. The residence time of the liquid in the first reaction tank and the residence time of the liquid in the activated carbon reaction tank are each preferably about 8 to 10 minutes, and below that, the rate of passing ammonia without being completely decomposed increases. The activated carbon used can be used repeatedly since it acts as a catalyst.
【００１１】[0011]
【作用】表１に、処理条件をそれぞれ変えた回分法によ
る試験で、２時間経過時の結果を示し、図３に、表１に
処理条件により処理した際の、アンモニアの分解により
発生する窒素ガスの量を経時測定したものを示す。Table 1 shows the results of a batch test carried out under various treatment conditions after 2 hours. FIG. 3 shows the nitrogen generated by decomposition of ammonia when treated under the treatment conditions. The amount of gas measured over time is shown.
【００１２】[0012]
【表１】 [Table 1]
【００１３】これらの表１及び図３から、アンモニアの
濃度が数百ｍｇ／リットル程度の場合、活性炭の添加は
その触媒効果により、反応の完結速度を大きく促進す
る。なお、表１において、No１−１とNo１−２及びNo２
−１とNo２−２の間に格別の差異が見られないのは、こ
の試験では２時間経過後の結果を示したためであり、実
際には、図３に示すように、活性炭を用いたNo１−１の
方が速やかに分解反応が進行している。From Table 1 and FIG. 3, when the concentration of ammonia is about several hundred mg / liter, the addition of activated carbon greatly accelerates the completion rate of the reaction due to its catalytic effect. In Table 1, No1-1, No1-2 and No2
No significant difference was observed between No. -1 and No. 2-2 because this test showed the results after 2 hours. Actually, as shown in FIG. In the case of -1, the decomposition reaction proceeds more rapidly.
【００１４】塩素の添加量がアンモニアに対し当量以下
の場合（No１−４）極端に分解が悪く、塩素は当量以上
添加することが必要である。また、処理後のｐＨは９以
上が望ましく、ｐＨ９以下（No１−３、No２−３、No２
−４）ではアンモニアは完全に窒素ガスに分解されず、
ＮＯｘなどの副反応生成物質が生じて、Ｔ−Ｎとして窒
素の残留が大きくなる。When the amount of chlorine added is less than the equivalent to ammonia (No 1-4), decomposition is extremely poor, and it is necessary to add chlorine in an amount equal to or more than the equivalent. Further, the pH after the treatment is desirably 9 or more, and the pH is 9 or less (No1-3, No2-3, No2).
In -4), ammonia is not completely decomposed into nitrogen gas,
By-products such as NOx are generated, and the amount of nitrogen remaining as TN increases.
【００１５】[0015]
【実施例】以下、実施例により本発明を具体的に説明す
るが本発明はこれらの実施例に限定されるものではな
い。 実施例１ 表２に示すような処理条件で、アンモニア濃度２５０ｍ
ｇ／リットルの液を作成し、本発明による処理を行い、
アンモニアの処理効果を確認した。EXAMPLES The present invention will now be described specifically with reference to examples, but the present invention is not limited to these examples. Example 1 Under the processing conditions shown in Table 2, the ammonia concentration was 250 m
g / liter of liquid, prepared according to the present invention,
The effect of ammonia treatment was confirmed.
【００１６】[0016]
【表２】 [Table 2]
【００１７】処理は、図１に示すような装置により、ま
ず液のｐＨをＮａＯＨでｐＨ９．８に調整後、ヤシ殻系
粒状活性炭（８〜３２メッシュ）９５ｇ（２００ｍｌ）
を直径３５ｍｍのカラムに充填し、次亜塩素酸ナトリウ
ムを、アンモニアに対し１．０〜１．１当量連続添加し
ながら２．４リットル／ｈで通水して処理した。アンモ
ニアの処理効果は、活性炭反応槽を通過した液のアンモ
ニア及びＴ−Ｎの濃度を測定し、確認した。結果を表３
に示す。In the treatment, first, the pH of the solution was adjusted to pH 9.8 with NaOH using a device as shown in FIG. 1, and then 95 g (200 ml) of coconut shell granular activated carbon (8 to 32 mesh).
Was packed in a column having a diameter of 35 mm, and sodium hypochlorite was passed through at a rate of 2.4 L / h while continuously adding 1.0 to 1.1 equivalents of ammonia to ammonia. The effect of ammonia treatment was confirmed by measuring the concentrations of ammonia and TN in the liquid passed through the activated carbon reaction tank. Table 3 shows the results
Shown in
【００１８】[0018]
【表３】 表３からわかるように、アンモニアは完全に分解されＴ
−Ｎで１．２ｍｇ／リットルまで処理でき、顕著な効果
が認められる。[Table 3] As can be seen from Table 3, ammonia is completely decomposed and T
-N can be treated up to 1.2 mg / liter, and a remarkable effect is recognized.
【００１９】実施例２ 表４に示すように、実施例１の１０倍の濃度のアンモニ
ア液を作成し、図２に示すような装置により、まず、被
処理液のｐＨをＮａＯＨでｐＨ１２．２に調整したの
ち、直径３５ｍｍの活性炭を充填していないカラムに、
アンモニアに対し１．０〜１．１当量のＮａＣｌＯを添
加しながら、２．４リットル／ｈで通水し、大部分のア
ンモニアを分解したのち、引き続き実施例１と同様の活
性炭を充填したカラムに通水し、処理した。Example 2 As shown in Table 4, an ammonia solution having a concentration 10 times that of Example 1 was prepared, and the pH of the liquid to be treated was first adjusted to pH 12.2 with NaOH using an apparatus as shown in FIG. After adjusting to, a column not filled with activated carbon with a diameter of 35 mm,
Water was passed at 2.4 liters / h while adding 1.0 to 1.1 equivalents of NaClO to ammonia to decompose most of the ammonia, followed by a column filled with the same activated carbon as in Example 1. And treated.
【００２０】また、活性炭を使用しない場合との処理効
果を比較するため、活性炭反応槽に活性炭を充填せず、
他は同様の操作を行った試験を比較例として実施した。
処理の効果は、実施例１と同様に処理液のアンモニア及
びＴ−Ｎの濃度を測定し確認した。それらの処理条件を
表４に、処理結果を表５に示す。In order to compare the treatment effect with the case where no activated carbon is used, the activated carbon reaction tank was not filled with activated carbon.
Other than that, the same operation was performed as a comparative example.
The effect of the treatment was confirmed by measuring the concentrations of ammonia and TN in the treatment liquid as in Example 1. Table 4 shows the processing conditions, and Table 5 shows the processing results.
【００２１】[0021]
【表４】 [Table 4]
【００２２】[0022]
【表５】 [Table 5]
【００２３】表５からわかるように、活性炭を使用した
場合アンモニアは完全に分解され、Ｔ−Ｎで４．４ｍｇ
／リットルまで処理できるが、活性炭を使用しない場合
は、アンモニアは完全に分解されないまま通過し、処理
液中に残留する。このように活性炭を使用することによ
り、数千ｍｇ／リットルという高濃度のアンモニアも短
時間で、完全に分解し、連続して安定した結果が得ら
れ、しかも、低濃度のアンモニア処理の場合と同じ流量
で処理できる顕著な効果が認められる。As can be seen from Table 5, when activated carbon was used, ammonia was completely decomposed, and 4.4 mg by TN.
Per liter, but when activated carbon is not used, ammonia passes through without being completely decomposed and remains in the processing solution. By using activated carbon in this way, high-concentration ammonia of several thousand mg / liter can be completely decomposed in a short time, and a stable result can be obtained continuously. A remarkable effect that can be processed at the same flow rate is observed.
【００２４】実施例３ 表６に示す液組成は、化学洗浄で良く用いられる薬品組
成であるが、該液に含有するアンモニアはアンモニア水
及び銅溶解助剤に起因するものである。試験は、図２に
示すような装置を用い、実施例２と同様の処理を行い、
処理液のアンモニアとＴ−Ｎの濃度を測定し処理の効果
を確認した。また、活性炭吸収槽から出るガスを１％の
硫酸水溶液（１００ｍｌ）に吸収させ、処理中のアンモ
ニアとＴ−Ｎ濃度を測定し気相のアンモニアガスの分解
の効果を確認した。表６に処理条件を、表７に処理結果
を示す。Example 3 The liquid composition shown in Table 6 is a chemical composition often used in chemical cleaning. Ammonia contained in the liquid is derived from aqueous ammonia and a copper dissolution aid. In the test, the same processing as in Example 2 was performed using an apparatus as shown in FIG.
The effects of the treatment were confirmed by measuring the concentrations of ammonia and TN in the treatment liquid. Further, the gas discharged from the activated carbon absorption tank was absorbed in a 1% aqueous sulfuric acid solution (100 ml), and the ammonia and TN concentrations during the treatment were measured to confirm the effect of decomposition of the gaseous ammonia gas. Table 6 shows the processing conditions, and Table 7 shows the processing results.
【００２５】[0025]
【表６】 [Table 6]
【００２６】[0026]
【表７】 註１．廃ガスのＮＨ3 、Ｔ−Ｎの濃度は、廃ガスを吸収
させた硫酸水溶液のＮＨ3 、Ｔ−Ｎを測定し、ガス濃度
に換算した。またＴ−Ｎはアンモニアガスに換算した値
である。[Table 7] Note 1. The NH 3 and TN concentrations of the waste gas were converted into gas concentrations by measuring the NH 3 and TN of the aqueous sulfuric acid solution in which the waste gas was absorbed. TN is a value converted into ammonia gas.
【００２７】表７からわかるように、液中のアンモニア
は完全に分解されＴ−Ｎとして１．８ｍｇ／リットルま
で処理でき、実際に用いられている液に対しても、実施
例２と同等の処理能力があることが認められる。また、
処理中、活性炭吸収槽から出る廃ガス中のアンモニアガ
ス、Ｔ−Ｎの濃度は、いずれも定量下限の５ｐｐｍ以下
であり、顕著な効果が認められた。As can be seen from Table 7, the ammonia in the liquid is completely decomposed and can be treated up to 1.8 mg / liter as TN, and the same as in Example 2 can be applied to the liquid actually used. It is recognized that there is processing capacity. Also,
During the treatment, the concentrations of ammonia gas and TN in the waste gas discharged from the activated carbon absorption tank were all lower than the lower limit of quantification of 5 ppm, and a remarkable effect was recognized.
【００２８】実施例４ 表８に示す液組成は、化学洗浄の防錆工程に良く用いら
れる薬品組成であり、実施例３と同様に処理を行った。
表８に処理条件を、表９に処理結果を示す。Example 4 The liquid composition shown in Table 8 is a chemical composition often used in the rust prevention step of chemical cleaning, and was treated in the same manner as in Example 3.
Table 8 shows the processing conditions, and Table 9 shows the processing results.
【００２９】[0029]
【表８】 [Table 8]
【００３０】[0030]
【表９】 [Table 9]
【００３１】表９からわかるように、Ｔ−Ｎとして３．
２ｍｇ／リットルまで処理でき、気相のアンモニアガ
ス、Ｔ−Ｎも定量下限の５ｐｐｍ以下であり、実施例３
と同様に顕著な効果が認められる。以上述べたように、
アンモニアを塩素を用いて分解処理する方法において、
活性炭を触媒として使用することによりアンモニアの分
解完結速度が促進され、連続処理が可能となる。As can be seen from Table 9, the TN is set to 3.
Example 3 Example 3
A remarkable effect is recognized as well. As mentioned above,
In a method of decomposing ammonia using chlorine,
By using activated carbon as a catalyst, the rate of completion of decomposition of ammonia is accelerated, and continuous processing becomes possible.
【００３２】また、数千ｍｇ／リットルという高濃度の
アンモニア含有液に対しても低濃度アンモニアの場合と
同じ流量で処理でき、かつＴ−Ｎとして５ｍｇ／リット
ル以下という安定した処理液が得られる。さらに、廃ガ
ス系に活性炭槽を設けることにより、気相のアンモニア
ガス、あるいは塩素ガスの処理も可能となり、全処理系
統でのアンモニア及び塩素の漏洩は完全に防止可能とな
り、連続クローズドフロー化が実現できる。Further, a high-concentration ammonia solution having a concentration of several thousand mg / liter can be treated at the same flow rate as in the case of a low-concentration ammonia, and a stable processing solution having a TN of 5 mg / liter or less can be obtained. . Furthermore, by providing an activated carbon tank to the waste gas system, the processing of the ammonia gas or chlorine gas, in the gas phase also becomes possible, leakage of ammonia and chlorine in the total process system becomes fully prevented, continuous claw's Dofuro of Can be realized.
【００３３】[0033]
【発明の効果】本発明によれば次のような効果を奏す
る。 ａ）アンモニアを含有する液を連続的にかつ確実にＴ−
Ｎとして５ｍｇ／リットル以下に処理できる。 ｂ）アンモニアの分解速度が速いので、処理流量が大き
くでき、処理時間が短縮される。 ｃ）系内の気相のアンモニアガスや塩素ガスも処理でき
る。 ｄ）活性炭は、繰り返し利用できるので経済的である。According to the present invention, the following effects can be obtained. a) The solution containing ammonia is continuously and reliably T-
N can be processed to 5 mg / liter or less. b) Since the decomposition rate of ammonia is high, the processing flow rate can be increased and the processing time can be shortened. c) Gas phase ammonia gas and chlorine gas in the system can also be treated. d) Activated carbon is economical because it can be used repeatedly.
【図１】本発明の処理法の一例を示す工程図。FIG. 1 is a process chart showing an example of the treatment method of the present invention.
【図２】本発明の処理法の他の例を示す工程図。FIG. 2 is a process chart showing another example of the processing method of the present invention.
【図３】アンモニアの分解により発生する窒素ガスの量
の経時変化を示すグラフ。FIG. 3 is a graph showing a change over time in the amount of nitrogen gas generated by decomposition of ammonia.
１：ｐＨ調整後の被処理液、２：塩素、３：活性炭槽、
４：処理液、５：廃ガス用活性炭槽、６、７、９：ポン
プ、８：第１反応槽、１０：廃ガス、1: liquid to be treated after pH adjustment, 2: chlorine, 3: activated carbon tank,
4: treatment liquid, 5: activated carbon tank for waste gas, 6, 7, 9: pump, 8: first reaction tank, 10: waste gas,
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 1/76 C02F 1/58 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) C02F 1/76 C02F 1/58
Claims (3)
廃液から窒素分を分解除去するに際し、該廃液に、含有
アンモニア分に対して当量以上の塩素を添加してから、
活性炭を触媒としてアンモニアを分解処理し、該処理に
よって遊離したアンモニアガス及び塩素ガスを含む廃ガ
スを、活性炭と接触させることを特徴とするアンモニア
含有廃液の処理法。When decomposing and removing a nitrogen component from a waste liquid containing ammonia and / or a salt thereof, adding an equivalent or more of chlorine to the waste liquid to the waste liquid,
Activated charcoal was decomposed ammonia as a catalyst, in the process
Waste gas containing ammonia gas and chlorine gas released
The scan, treatment of ammonia-containing waste liquid, characterized in Rukoto is contacted with activated carbon.
は、該廃液をまず塩素のみによる処理で大部分のアンモ
ニア分を除去した後、残りのアンモニア分を活性炭を触
媒として分解処理することを特徴とする請求項１記載の
アンモニア含有廃液の処理法。2. When the concentration of ammonia in the waste liquid is high, the waste liquid is first treated with only chlorine to remove most of the ammonia, and then the remaining ammonia is decomposed using activated carbon as a catalyst. The method for treating an ammonia-containing waste liquid according to claim 1, wherein:
アの分解除去後のｐＨがアルカリ性を呈するようにｐＨ
を調整することを特徴とする請求項１又は２記載のアン
モニア含有廃液の処理法。3. The pH of the waste liquid is adjusted so that the pH after decomposing and removing ammonia is alkaline before adding chlorine.
The method for treating an ammonia-containing waste liquid according to claim 1 or 2, wherein the temperature is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01772394A JP3148498B2 (en) | 1994-01-19 | 1994-01-19 | Treatment of wastewater containing ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01772394A JP3148498B2 (en) | 1994-01-19 | 1994-01-19 | Treatment of wastewater containing ammonia |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07204669A JPH07204669A (en) | 1995-08-08 |
| JP3148498B2 true JP3148498B2 (en) | 2001-03-19 |
Family
ID=11951675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01772394A Expired - Lifetime JP3148498B2 (en) | 1994-01-19 | 1994-01-19 | Treatment of wastewater containing ammonia |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3148498B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015154975A (en) * | 2010-06-18 | 2015-08-27 | 李輝ＬＩ， Ｈｕｉ | Penis sizing-up training system |
-
1994
- 1994-01-19 JP JP01772394A patent/JP3148498B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015154975A (en) * | 2010-06-18 | 2015-08-27 | 李輝ＬＩ， Ｈｕｉ | Penis sizing-up training system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07204669A (en) | 1995-08-08 |
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