JPH07204669A - Treatment of waste liquid containing ammonia - Google Patents
Treatment of waste liquid containing ammoniaInfo
- Publication number
- JPH07204669A JPH07204669A JP6017723A JP1772394A JPH07204669A JP H07204669 A JPH07204669 A JP H07204669A JP 6017723 A JP6017723 A JP 6017723A JP 1772394 A JP1772394 A JP 1772394A JP H07204669 A JPH07204669 A JP H07204669A
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- waste liquid
- activated carbon
- treatment
- chlorine
- 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.)
- Granted
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 185
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 87
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 238000011282 treatment Methods 0.000 title abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000000460 chlorine Substances 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 22
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims abstract description 8
- 239000002912 waste gas Substances 0.000 claims description 9
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical class Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
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
- Treating Waste Gases (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
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 an ammonia-containing waste liquid, and particularly to an industrial waste liquid 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 cleaning 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。BACKGROUND OF THE INVENTION Ammonia and / or its salts are used as a cleaning agent for removing copper scales and various metal oxide scales adhering to a metal surface, and for suppressing the generation of rust on the metal surface. It is widely used as a rust preventive and storage agent. The waste liquid discharged after cleaning or rust prevention contains ammonia. In discharging this waste liquid, it is necessary to remove ammonia, which is one of the causative substances of eutrophication. Conventionally, the following means has been adopted for treating a liquid containing ammonia. Ammonia stripping method is used to release ammonia into the atmosphere, method is decomposed by microorganisms such as nitrifying bacteria and denitrifying bacteria, method is concentrated by using RO (reverse osmosis membrane), method is decomposed 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。Each of the above processing methods has the following problems. In the case of, since ammonia is diffused into the atmosphere, a device for collecting the diffused ammonia is required. Moreover, the number of processing days is required. In this case, there are problems of culturing microorganisms and equipment cost, and it is not practical as a treatment of unsteady waste liquid. In the case of, the ammonia can be treated relatively easily, but the treatment becomes difficult when the type of liquid or the salt concentration in the liquid is high. In this case, although it is a method that can be carried out at present, the completion of the reaction is slow, so that the processing equipment and equipment are large, and the processing time is long and the load is large. In addition, since the method (1) does not decompose ammonia, it is not a fundamental solution and requires a secondary treatment.
【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。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, treats nitrogen due to ammonia and / or its salt to 10 mg / liter or less, and is continuous in a compact apparatus. An object of the present invention is to provide a treatment method that enables various treatments 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すること
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, in the present invention, when decomposing and removing a nitrogen component from a waste liquid containing ammonia and / or a salt thereof, the waste liquid containing This is a method for treating an ammonia-containing waste liquid, characterized in that after adding an equivalent amount or more of chlorine, ammonia is decomposed using activated carbon as a catalyst.
【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、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のがよい。In the above treatment method, when the ammonia content in the waste liquid has a high concentration, 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 good to do
The waste liquid is p before decomposition and removal of ammonia before chlorine addition.
It is advisable to adjust the pH so that H exhibits an alkalinity, preferably pH 9.0 or higher. Further, in the present invention,
It is preferable that the waste gas containing the liberated ammonia gas and chlorine gas is brought into contact with activated carbon by the method for treating the ammonia-containing waste liquid to decompose or adsorb and remove the ammonia and chlorine gas in the waste gas.
【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 a salt thereof, the pH is adjusted so that the pH of the waste liquid after the treatment is maintained at 9 or more, and then chlorine and activated carbon are added. It is used to decompose ammonia and remove nitrogen of ammonia as nitrogen gas. Further, when the ammonia concentration of the target waste liquid is about several hundred mg / liter, ammonia can be decomposed quickly by the one-step treatment of passing the activated carbon tank while adding chlorine to the waste liquid. When it is as high as 1,000 mg / liter, after adjusting the pH, after decomposing most of the ammonia in a tank not filled with activated carbon while continuously adding chlorine to the waste liquid,
By carrying out a two-step treatment of passing through an activated carbon tank, the reaction is completed promptly and continuous treatment becomes possible. In the treatment of waste liquid, how quickly a low value is reached greatly affects 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 the ammonia and / or its salt of the present invention is about several hundred mg / liter, the liquid to be treated 1 whose pH has been adjusted with an alkali in advance is pumped with chlorine by a pump 6 as shown in FIG. At the same time, 2 is mixed by a pump 7 at a flow rate ratio determined in advance and sent to the activated carbon tank 3 to promptly decompose ammonia by the catalytic action of activated carbon. Unreacted chlorine gas and ammonia gas exist in the gas phase part of the system, but by introducing these to the activated carbon tank 5, the ammonia gas reacts with the chlorine gas to become nitrogen gas, and further excess chlorine The gas is adsorbed by activated carbon, and the exhaust gas is processed 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. 2, the liquid to be treated 1 adjusted with alkali in advance is pump 6 and chlorine 2 is pumped 7.
At the same time, after mixing at a flow rate ratio previously obtained, it is sent to the first reaction tank 8, where most of the ammonia is first decomposed, and then pump 9 is sent to the activated carbon reaction tank 3 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。Chlorine used for decomposing 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 that in the activated carbon reaction tank are preferably about 8 to 10 minutes, respectively, and below that, the proportion of ammonia that passes through without being completely decomposed increases. Since the activated carbon used acts as a catalyst, it can be used repeatedly.
【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。In Table 1, the results of the test by the batch method under different treatment conditions after 2 hours are shown, and in Fig. 3, the nitrogen generated by the decomposition of ammonia when treated under the treatment conditions is shown in Table 1. 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, addition of activated carbon greatly accelerates the reaction completion rate due to its catalytic effect. In Table 1, No1-1, No1-2 and No2
No particular difference between -1 and No2-2 was observed because this test showed the results after 2 hours had passed, and in fact, as shown in FIG. 3, No1 using activated carbon was used. In -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 equal to or less than that of ammonia (No. 1-4), the decomposition is extremely poor, and it is necessary to add chlorine in an amount equal to or more than equivalent. Further, the pH after the treatment is preferably 9 or more, and is 9 or less (No1-3, No2-3, No2).
In -4), ammonia is not completely decomposed into nitrogen gas,
A side reaction product such as NOx is generated, and the amount of nitrogen remaining as T-N 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 be described in detail below with reference to examples, but the present invention is not limited to these examples. Example 1 Under the treatment conditions shown in Table 2, the ammonia concentration was 250 m.
a solution of g / liter is prepared and treated according to the present invention,
The treatment effect of ammonia 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, the pH of the liquid was first adjusted to pH 9.8 with NaOH using an apparatus as shown in FIG. 1, and then 95 g (200 ml) of coconut shell granular activated carbon (8 to 32 mesh) was used.
Was packed in a column having a diameter of 35 mm, and sodium hypochlorite was continuously added in an amount of 1.0 to 1.1 equivalents with respect to ammonia, and water was passed therethrough at 2.4 liter / h for treatment. The treatment effect of ammonia was confirmed by measuring the concentrations of ammonia and TN in the liquid that passed through the activated carbon reaction tank. The results are shown in Table 3.
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 with NaOH to pH 12.2 by an apparatus as shown in FIG. After adjusting to, a column with a diameter of 35 mm not packed with activated carbon,
While adding 1.0 to 1.1 equivalents of NaClO to ammonia, water was passed at 2.4 liters / h to decompose most of the ammonia, and then a column packed with activated carbon similar to that in Example 1 was used. It was treated with water.
【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 activated carbon is not used, the activated carbon reaction tank is not filled with activated carbon,
A test in which other operations were the same 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, ammonia was completely decomposed when activated carbon was used, and 4.4 mg of TN was obtained.
Although it can be treated up to 1 liter / liter, when activated carbon is not used, ammonia passes through without being completely decomposed and remains in the treatment liquid. By using activated carbon in this way, ammonia with a high concentration of several thousand mg / liter can be completely decomposed in a short time, and stable and continuous results can be obtained. A remarkable effect that the same flow rate can be treated is recognized.
【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, and the ammonia contained in the liquid is derived from aqueous ammonia and a copper dissolution aid. The test was performed using the apparatus as shown in FIG.
The effect of the treatment was 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% sulfuric acid aqueous solution (100 ml), and the ammonia and TN concentrations during the treatment were measured to confirm the effect of decomposing 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 concentrations of NH 3 and TN in the waste gas were converted to gas concentrations by measuring NH 3 and TN in the aqueous sulfuric acid solution that absorbed the waste gas. Further, 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 T-N, and the liquid actually used is the same as in Example 2. Permitted to have processing power. Also,
During the treatment, the concentrations of ammonia gas and TN in the waste gas discharged from the activated carbon absorption tank were both lower than or equal to 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 anticorrosion 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, TN is 3.
It can be treated up to 2 mg / liter, and ammonia gas in the gas phase and T-N are also at the lower limit of quantification of 5 ppm or less.
A remarkable effect is recognized as well. As mentioned above,
In the method of decomposing ammonia with chlorine,
By using activated carbon as a catalyst, the decomposition completion rate of ammonia is promoted and continuous treatment 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、連続クローブドフロー化が実現できる。Further, a high-concentration ammonia-containing liquid of several thousand mg / liter can be treated at the same flow rate as in the case of low-concentration ammonia, and a stable treatment liquid of TN of 5 mg / liter or less can be obtained. . Furthermore, by installing an activated carbon tank in the waste gas system, it is possible to process gaseous ammonia gas or chlorine gas, and it is possible to completely prevent leakage of ammonia and chlorine in the entire processing system, creating a continuous cloved flow. 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) A liquid containing ammonia is continuously and reliably T-
N can be treated 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) Ammonia gas and chlorine gas in the gas phase 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 drawing showing an example of a processing 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 drawing 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 changes over time in the amount of nitrogen gas generated by the 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 (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/58 ＺＡＢ Ｐ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location C02F 1/58 ZAB P
Claims (4)
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することを特
徴とするアンモニア含有廃液の処理法。1. When decomposing and removing a nitrogen component from a waste liquid containing ammonia and / or a salt thereof, after adding chlorine in an amount equal to or more than the amount of ammonia content to the waste liquid,
A method for treating waste liquid containing ammonia, which comprises decomposing ammonia with activated carbon as a catalyst.
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 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. 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 decomposition and removal of ammonia becomes alkaline before chlorine is added.
The method for treating an ammonia-containing waste liquid according to claim 1 or 2, wherein:
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請求項１、２
又は３記載のアンモニア含有廃液の処理法。4. A waste gas containing ammonia gas and chlorine gas liberated by the method for treating the ammonia-containing waste liquid is brought into contact with activated carbon.
Alternatively, the method for treating an ammonia-containing waste liquid according to the item 3.
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 true JPH07204669A (en) | 1995-08-08 |
| JP3148498B2 JP3148498B2 (en) | 2001-03-19 |
Family
ID=11951675
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01772394A Expired - Lifetime JP3148498B2 (en) | 1994-01-19 | 1994-01-19 | Treatment of wastewater containing ammonia |
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| Country | Link |
|---|---|
| JP (1) | JP3148498B2 (en) |
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1994
- 1994-01-19 JP JP01772394A patent/JP3148498B2/en not_active Expired - Lifetime
Cited By (1)
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|---|---|---|---|---|
| CN114210188A (en) * | 2021-12-30 | 2022-03-22 | 广东臻鼎环境科技有限公司 | Tail gas treatment device and method for copper recovery production line |
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| Publication number | Publication date |
|---|---|
| JP3148498B2 (en) | 2001-03-19 |
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