JP2957464B2 - Treatment method for wastewater containing hydrogen peroxide - Google Patents
Treatment method for wastewater containing hydrogen peroxideInfo
- Publication number
- JP2957464B2 JP2957464B2 JP6239996A JP6239996A JP2957464B2 JP 2957464 B2 JP2957464 B2 JP 2957464B2 JP 6239996 A JP6239996 A JP 6239996A JP 6239996 A JP6239996 A JP 6239996A JP 2957464 B2 JP2957464 B2 JP 2957464B2
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- tank
- hydrogen peroxide
- wastewater
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- raw water
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、工業排水中の可溶
性化学物質を不溶化処理して沈殿物として除去して無害
の水を得る排水処理方法に関し、特に、排水中の過酸化
水素(H2 O2 )を分解処理する排水処理方法に関する
ものである。BACKGROUND OF THE INVENTION The present invention relates to a waste water treatment method for obtaining a harmless water is removed as a precipitate by insolubilization soluble chemicals in the industrial wastewater, in particular, hydrogen peroxide in the waste water (H 2 The present invention relates to a wastewater treatment method for decomposing O 2 ).
【0002】[0002]
【従来の技術】半導体装置の製造工程には、エッチング
や研磨、洗浄などの工程があり、これらの工程では、フ
ッ酸、リン酸、過酸化水素水などの各種の薬品が使用さ
れる。したがって、これらの排水を廃棄するときには、
公害を発生させないようにするための処理が必要とな
る。図4は、このために使用される従来の排水処理シス
テムの概略を示す構成図である。2. Description of the Related Art Manufacturing processes for semiconductor devices include processes such as etching, polishing, and cleaning. In these processes, various chemicals such as hydrofluoric acid, phosphoric acid, and hydrogen peroxide are used. Therefore, when discarding these wastewaters,
Processing is required to prevent pollution. FIG. 4 is a configuration diagram schematically showing a conventional wastewater treatment system used for this purpose.
【0003】各製造工程から排出される排水aはまず原
水槽1に集められ、ここで所定時間滞留する。排水aは
工程作業の状況により一時的に薬品の濃度が高くなるこ
とがある。薬品濃度が高すぎる場合には排水処理が不完
全になることがあるため、この原水槽において一時的に
貯留して濃度の均一化が図られる。濃度の均一化のため
に、空気ポンプ2により原水槽1に空気を入れ、排水を
緩やかに攪拌している。排水aには、フッ素イオンやリ
ン酸イオンが含まれ、平均するとpHは2〜3程度にな
っている。排水処理システムに異常が生じた場合、修理
が完了するまでの間排水を溜めておく必要がある。その
ためには原水槽は大きいほどよいが、スペースの関係上
5〜6時間分の排水を貯蔵できる程度の大きさになされ
ている。したがって、原水槽1に排水aが滞留している
時間は5〜6時間程度である。[0003] Waste water a discharged from each manufacturing process is first collected in a raw water tank 1 and stays there for a predetermined time. The concentration of the chemical in the waste water a may temporarily increase depending on the state of the process operation. If the chemical concentration is too high, the wastewater treatment may be incomplete. Therefore, the chemical is temporarily stored in the raw water tank to make the concentration uniform. In order to make the concentration uniform, air is introduced into the raw water tank 1 by the air pump 2, and the waste water is gently stirred. The drainage a contains fluorine ions and phosphate ions, and has an average pH of about 2 to 3. If an abnormality occurs in the wastewater treatment system, it is necessary to store the wastewater until the repair is completed. To this end, the larger the raw water tank is, the better, but the space is large enough to store 5 to 6 hours of wastewater due to space limitations. Therefore, the time during which the drainage a stays in the raw water tank 1 is about 5 to 6 hours.
【0004】原水槽1の排水は排水bとして反応槽3へ
送られる。反応槽3では反応を促進するために攪拌機4
により排水を激しく攪拌している。この反応槽では以下
の反応が行われる。 アルカリ性の中和剤(水酸化カルシウムや水酸化ナ
トリウムなど)5を混合して排水を中和する。 炭酸カルシウムなどのCa塩7を加えて、フッ素イ
オン(F- )やリン酸イオン(PO4 -- 、P2 O5 -- )
を水に溶けにくいCa塩にする。 カタラーゼ6aを加えて、過酸化水素を水と酸素に
分解する。The waste water from the raw water tank 1 is sent to the reaction tank 3 as waste water b. In the reaction tank 3, a stirrer 4 is used to promote the reaction.
The wastewater is vigorously stirred. The following reaction is performed in this reaction tank. The wastewater is neutralized by mixing an alkaline neutralizing agent (such as calcium hydroxide or sodium hydroxide) 5. By adding Ca salt 7 such as calcium carbonate, fluorine ion (F − ) and phosphate ion (PO 4 − , P 2 O 5 − )
To a Ca salt that is hardly soluble in water. Catalase 6a is added to decompose hydrogen peroxide into water and oxygen.
【0005】ここで、カタラーゼの添加量は排水bに対
して30ppm程度である。カタラーゼとは、過酸化水
素を水と酸素に分解する酵素の総称で、生物に由来しそ
の種類は無数に存在する。酵素作用のための最適pH
は、肝臓、赤血球、細菌のものは中性付近、植物のもの
は5.3〜8.6であるとされ(化学大辞典編集委員会
編、「化学大辞典」共立出版、pp.425−42
6)、そのため、反応槽において、中和剤を加えた後に
カタラーゼを添加していた。反応槽3に排水bが滞留し
ている時間はおおよそ30分程度である。[0005] Here, the amount of catalase added is about 30 ppm with respect to the wastewater b. Catalase is a general term for enzymes that decompose hydrogen peroxide into water and oxygen. There are countless types derived from living organisms. Optimal pH for enzymatic action
Is estimated to be around neutral for liver, erythrocytes and bacteria, and 5.3 to 8.6 for plants (edited by the Chemical Dictionary Editor's Committee, "Chemical Dictionary" Kyoritsu Shuppan, pp. 425- 42
6) Therefore, in the reaction tank, catalase was added after adding the neutralizing agent. The time during which the waste water b stays in the reaction tank 3 is about 30 minutes.
【0006】反応槽3の排水は排水cとして凝集槽8へ
送られる。反応槽3において生成され排水cに含まれて
いる非水溶性物質は微細なため沈殿しにくい。そこで、
凝集槽8では、高分子ポリマーのような凝集剤10を添
加して微細非水溶性物質を沈殿しやすい大きなフロック
11に成長させる。凝集槽8では、凝集を促進するた
め、攪拌機9により排水を緩やかに攪拌している。凝集
は、中和反応ほど急速ではないが30分程度で所望の大
きさに成長する。The wastewater from the reaction tank 3 is sent to the coagulation tank 8 as wastewater c. The water-insoluble substances generated in the reaction tank 3 and contained in the wastewater c are so fine that they hardly precipitate. Therefore,
In the flocculation tank 8, a flocculant 10 such as a high-molecular polymer is added to grow the fine water-insoluble substance into a large floc 11 that can easily precipitate. In the coagulation tank 8, the wastewater is gently stirred by the stirrer 9 in order to promote the coagulation. Aggregation grows to the desired size in about 30 minutes, although not as rapidly as the neutralization reaction.
【0007】凝集槽8の排水は排水dとして沈殿槽12
へ送られる。沈殿槽12は、凝集槽8で成長したフロッ
ク11を沈殿させて固液分離するための槽である。沈殿
に要する時間は5〜6時間程度である。分離された沈殿
物13と排水eは別々の排出口から取り出され、処理が
完了する。この沈殿槽12に未反応の過酸化水素が混入
したままの排水が送られてきた場合には、過酸化水素の
分解によって気泡が発生しこの気泡がフロックと結合す
ることにより、フロックが浮上してしまう。このため、
沈殿槽での固液分離が不完全となり排水eがフロックを
含んだまま排出されることになる。この不都合を避ける
には、排水d中の過酸化水素の濃度は10ppm以下と
する必要があるとされている。この程度以下の濃度に下
げるために、従来、反応槽に多量のカタラーゼを投入し
ていた。なお、カタラーゼを添加する排水処理方法は、
例えば特公平7−22752号公報(特開昭63−27
0595)により公知となっている。The wastewater from the coagulation tank 8 is used as wastewater d as the sedimentation tank 12
Sent to The sedimentation tank 12 is a tank for sedimenting the flocs 11 grown in the coagulation tank 8 and separating them into solid and liquid. The time required for precipitation is about 5 to 6 hours. Separated sediment 13 and drainage e are taken out from different outlets, and the treatment is completed. If waste water with unreacted hydrogen peroxide mixed therein is sent to the sedimentation tank 12, bubbles are generated by decomposition of the hydrogen peroxide, and the bubbles are combined with the flocs, so that the flocs float. Would. For this reason,
The solid-liquid separation in the sedimentation tank becomes incomplete, and the drainage e is discharged while containing the flocs. In order to avoid this inconvenience, it is said that the concentration of hydrogen peroxide in the waste water d needs to be 10 ppm or less. Conventionally, a large amount of catalase has been introduced into the reaction tank in order to reduce the concentration to below this level. In addition, the wastewater treatment method to add catalase,
For example, Japanese Patent Publication No. Hei.
0595).
【0008】[0008]
【発明が解決しようとする課題】上述した従来の排水処
理方法では、反応槽3にカタラーゼを投入していたた
め、沈殿槽12に流入する前の反応時間は1時間程度と
短く、沈殿槽に流入する排水dでの過酸化水素濃度を十
分に下げるには、多量のカタラーゼを添加する必要があ
った。カタラーゼの投入量を少なくする手段として、 反応槽3あるいは凝集槽8における滞留時間を長く
する、 原水槽1に中和剤とともにカタラーゼを投入する、 などの方法が考えられる。しかし、前者では、反応槽や
凝集槽に大きなスペースが必要となる外排水を激しく攪
拌する攪拌機の大容量化が必要となって現実的ではな
い。また、後者でも、原水槽の排水を激しく攪拌する攪
拌機が必要となるため実現が困難である。したがって、
本発明の解決すべき課題は、処理装置の大規模化を招く
ことなくカタラーゼの添加量を少なくできるようにする
ことである。In the above-mentioned conventional wastewater treatment method, catalase is charged into the reaction tank 3, so that the reaction time before flowing into the precipitation tank 12 is as short as about 1 hour, In order to sufficiently reduce the concentration of hydrogen peroxide in the waste water d, it was necessary to add a large amount of catalase. As a means for reducing the amount of catalase to be charged, a method of increasing the residence time in the reaction tank 3 or the flocculation tank 8 or charging catalase together with the neutralizing agent into the raw water tank 1 can be considered. However, the former method is not realistic because a large capacity is required for a stirrer that vigorously stirs external wastewater that requires a large space in a reaction tank or a coagulation tank. Also, the latter is difficult to realize because a stirrer that vigorously stirs the wastewater from the raw water tank is required. Therefore,
The problem to be solved by the present invention is to make it possible to reduce the amount of catalase to be added without increasing the scale of the processing apparatus.
【0009】[0009]
【課題を解決するための手段】本発明の排水処理方法で
は、上述の課題を解決するために、 酸性溶液中においても過酸化水素を分解できる種類
のカタラーゼを用いる、 カタラーゼを原水槽において投入する、 の二つの手段を採用する。According to the wastewater treatment method of the present invention, in order to solve the above-mentioned problems, catalase is used in a raw water tank using a catalase of a type capable of decomposing hydrogen peroxide even in an acidic solution. The following two methods are adopted.
【0010】「化学大辞典」にも記載のあるように従来
のカタラーゼはpH5.3〜8.6程度で活性で、本発
明において処理しようとしているpH3以下の排水には
直接投入することはできなかった。しかし、最近になっ
て主にカビから取り出したカタラーゼで低いpH値にお
いてもなお活性を示すものが得られた。そのようなカタ
ラーゼとしてアスクスーパー25(商品名:三菱瓦斯化
学株式会社製)が挙げられる。本発明においてはこの種
のカタラーゼを用いる。As described in the "Chemical Dictionary", conventional catalase is active at about pH 5.3 to 8.6, and cannot be directly introduced into wastewater of pH 3 or lower to be treated in the present invention. Did not. However, recently catalase, mainly extracted from mold, has been obtained which still shows activity even at low pH values. As such a catalase, Ask Super 25 (trade name: manufactured by Mitsubishi Gas Chemical Co., Ltd.) can be mentioned. In the present invention, this type of catalase is used.
【0011】図2は、pH2.5、初期の過酸化水素濃
度250ppmの溶液に、12ppmのアスクスーパー
25と、ウシやブタの肝臓に由来する従来より採用され
てきたカタラーゼ(以下、従来品という)を添加した場
合の過酸化水素濃度の推移を示す。同図に示されるよう
に、アスクスーパー25を添加した場合には、300分
経過後には、過酸化水素をほぼ完全に分解することがで
きるが、従来品のカタラーゼを添加した場合には、低い
pHにより活性が失われるため、長時間経過しても過酸
化水素濃度はほとんど変化しない。図2と同様の実験を
pH値を変化させて行った。すなわち、pH値の異なる
250ppmの過酸化水素水に12ppmのカタラーゼ
を加え、5時間経過後に過酸化水素をどれだけ分解でき
たかを測定した。図3は、pHが7のときの分解量を1
00として図示したグラフである。このグラフから、従
来品では、pH4以下では過酸化水素を分解する能力が
ほとんどないことが分かる。本発明の排水処理方法は、
酸性溶液中においても活性の失われないカタラーゼを用
い、これを原水槽において投入するものであり、この手
段を採用することにより上述した課題を解決することが
できる。FIG. 2 shows a solution of pH 2.5 and an initial hydrogen peroxide concentration of 250 ppm, and 12 ppm of Asksuper 25 and catalase (hereinafter referred to as a conventional product) which has been conventionally used and derived from bovine or porcine liver. 6) shows the transition of the concentration of hydrogen peroxide when (2) is added. As shown in the figure, when Ask Super 25 was added, hydrogen peroxide could be almost completely decomposed after 300 minutes, but when the conventional product catalase was added, a low level was obtained. Since the activity is lost due to the pH, the hydrogen peroxide concentration hardly changes even after a long time. An experiment similar to that of FIG. 2 was performed by changing the pH value. That is, 12 ppm of catalase was added to 250 ppm of hydrogen peroxide having different pH values, and after 5 hours, how much hydrogen peroxide could be decomposed was measured. FIG. 3 shows that the amount of decomposition at pH 7 was 1
It is a graph illustrated as 00. From this graph, it can be seen that the conventional product has little ability to decompose hydrogen peroxide at pH 4 or less. The wastewater treatment method of the present invention,
Catalase which does not lose its activity even in an acidic solution is used and is charged in a raw water tank. By using this means, the above-mentioned problem can be solved.
【0012】[0012]
【発明の実施の形態】図1は、本発明による排水処理方
法を実施するための処理システムの概略を示す構成図で
ある。図4に示した従来の処理方法とは異なり、カタラ
ーゼ6は原水槽1に投入される。このカタラーゼは酸性
溶液中においても活性を失わないものが用いられる。従
来例と同様に工場各所において排出された排水aはまず
大容量の原水槽1に集められ、ここでカタラーゼ6が投
入された後、所定時間滞留する。排水は空気ポンプ2に
より送られた空気により緩やかに攪拌される。この原水
槽での排水の滞留時間は5〜6時間程度である。この滞
留中に大部分の過酸化水素は分解される。原水槽1の排
水は排水bとして反応槽3へ送られ、中和剤5およびC
a塩7が加えられ、水に溶けにくいCa塩が生成され
る。反応槽3では反応の促進のために攪拌機4により激
しい攪拌が行われる。反応槽3に排水bが滞留している
時間はおおよそ30分程度である。FIG. 1 is a block diagram showing the outline of a treatment system for carrying out a wastewater treatment method according to the present invention. Unlike the conventional treatment method shown in FIG. 4, catalase 6 is charged into the raw water tank 1. The catalase used does not lose its activity even in an acidic solution. As in the conventional example, the waste water a discharged from the various places in the factory is first collected in a large-capacity raw water tank 1, where catalase 6 is charged and stays there for a predetermined time. The waste water is gently stirred by the air sent by the air pump 2. The residence time of the wastewater in this raw water tank is about 5 to 6 hours. Most of the hydrogen peroxide is decomposed during this residence. The waste water from the raw water tank 1 is sent to the reaction tank 3 as waste water b, and the neutralizing agent 5 and C
a salt 7 is added to form a Ca salt that is hardly soluble in water. In the reaction tank 3, vigorous stirring is performed by a stirrer 4 to promote the reaction. The time during which the waste water b stays in the reaction tank 3 is about 30 minutes.
【0013】反応槽3の排水は排水cとして凝集槽8へ
送られる。ここで添加される凝集剤10により反応槽3
において生成された非水溶性物質は沈殿しやすい大きな
フロック11に成長される。凝集槽8では、攪拌機9に
より排水を緩やかに攪拌している。凝集槽8での滞留時
間は30分程度である。凝集槽8の排水は排水dとして
沈殿槽12へ送られ、ここで凝集槽8で成長したフロッ
ク11を沈殿させて固液分離を行う。沈殿槽12での滞
留時間は5〜6時間程度である。本発明の排水処理方法
によれば、カタラーゼ投入から沈殿槽に至るまでの時間
を、6〜7時間と従来例の場合の1時間から大幅に延ば
すことができる。そのため、従来例の場合よりもカタラ
ーゼの添加量を少なくしても、沈殿槽に至るまでに十分
に過酸化水素の濃度を低下させることができる。The waste water from the reaction tank 3 is sent to the coagulation tank 8 as waste water c. The coagulant 10 added here causes the reaction tank 3
The water-insoluble substance produced in the step (1) grows into a large floc 11 which tends to precipitate. In the coagulation tank 8, the wastewater is gently stirred by the stirrer 9. The residence time in the coagulation tank 8 is about 30 minutes. The wastewater from the coagulation tank 8 is sent to the sedimentation tank 12 as wastewater d, where the floc 11 grown in the coagulation tank 8 is settled to perform solid-liquid separation. The residence time in the settling tank 12 is about 5 to 6 hours. According to the wastewater treatment method of the present invention, the time from the introduction of catalase to the settling tank can be greatly extended from 6 to 7 hours, which is 1 hour in the conventional example. Therefore, even if the amount of catalase added is smaller than in the case of the conventional example, the concentration of hydrogen peroxide can be sufficiently reduced before reaching the precipitation tank.
【0014】[0014]
【実施例】次に、本発明の実施例について説明するが、
本発明はこれに限定されない。原水槽(滞留時間310
分間)、反応槽(滞留時間30分間)、凝集槽(滞留時
間30分間)、沈殿槽(滞留時間310分間)からなる
実験用排水処理設備で残留過酸化水素分解試験を実施し
た。実験用排水は、製造ラインから排水を原水槽へ引き
込んで使用した。反応槽でのpH調整には石灰乳を使用
した。原水槽の排水に対しアスクスーパー25を20p
pm定量添加した。pH2.8、過酸化水素濃度123
ppmの原水槽の排水にアスクスーパー25を添加した
とき、6時間経過後の沈殿槽に流入する排水での過酸化
水素濃度は5ppmであった。また、pH3.1、過酸
化水素濃度206ppmの原水槽の排水にアスクスーパ
ー25を添加したとき、6時間経過後の沈殿槽に流入す
る排水での過酸化水素濃度は4ppmであった。Next, an embodiment of the present invention will be described.
The present invention is not limited to this. Raw water tank (residence time 310
Min), a reaction tank (residence time 30 minutes), a coagulation tank (residence time 30 minutes), and a sedimentation tank (residence time 310 minutes), and a residual hydrogen peroxide decomposition test was performed. Experimental wastewater was used by drawing wastewater from a production line into a raw water tank. Lime milk was used for pH adjustment in the reaction tank. Ask Super 25 20p for drainage of raw water tank
pm was added. pH 2.8, hydrogen peroxide concentration 123
When AskSuper 25 was added to the wastewater from the raw water tank of ppm, the concentration of hydrogen peroxide in the wastewater flowing into the sedimentation tank after 6 hours was 5 ppm. When AskSuper 25 was added to the wastewater from the raw water tank having a pH of 3.1 and a hydrogen peroxide concentration of 206 ppm, the concentration of hydrogen peroxide in the wastewater flowing into the sedimentation tank after 6 hours had passed was 4 ppm.
【0015】[比較例1]同一の処理装置において、反
応槽の排水にアスクスーパー25を30ppm定量添加
した。反応槽に流入する排水のpHが2.3、過酸化水
素の濃度が220ppmであるとき、1時間経過後の沈
殿槽に流入する排水での過酸化水素濃度は24ppmで
あった。[Comparative Example 1] In the same processing apparatus, 30 ppm of Ask Super 25 was quantitatively added to the waste water of the reaction tank. When the pH of the wastewater flowing into the reaction tank was 2.3 and the concentration of hydrogen peroxide was 220 ppm, the concentration of hydrogen peroxide in the wastewater flowing into the precipitation tank after one hour had passed was 24 ppm.
【0016】[比較例2]同一の処理装置において、原
水槽の排水に従来品のカタラーゼを30ppm定量添加
した。原水槽でのpHが2.6、過酸化水素の濃度が1
90ppmであるとき、6時間経過後の沈殿槽に流入す
る排水での過酸化水素濃度は25ppmであった。[Comparative Example 2] In the same treatment apparatus, 30 ppm of a conventional catalase was quantitatively added to wastewater from a raw water tank. The pH in the raw water tank is 2.6 and the concentration of hydrogen peroxide is 1
When it was 90 ppm, the concentration of hydrogen peroxide in the wastewater flowing into the sedimentation tank after 6 hours was 25 ppm.
【0017】[0017]
【発明の効果】以上説明したように、本発明による排水
処理方法は、原水槽の排水に酸性溶液中でも活性の低下
しないカタラーゼを添加するものであるので、従来の排
水処理システムをほとんどそのまま使用して、残留過酸
化水素の分解するためのカタラーゼの使用量を低減させ
ることができる。As described above, the wastewater treatment method according to the present invention involves adding catalase, which does not decrease its activity even in an acidic solution, to the wastewater from a raw water tank, so that a conventional wastewater treatment system can be used almost as it is. Thus, the amount of catalase used to decompose residual hydrogen peroxide can be reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施例において用いられる排水処理シ
ステムの概略構成図。FIG. 1 is a schematic configuration diagram of a wastewater treatment system used in an embodiment of the present invention.
【図2】本発明において用いられるカタラーゼと従来品
のカタラーゼを用いたときの過酸化水素の分解の時間経
過を示すグラフ。FIG. 2 is a graph showing the time course of decomposition of hydrogen peroxide when the catalase used in the present invention and a conventional catalase are used.
【図3】本発明において用いられるカタラーゼと従来品
のカタラーゼとのpH値と活性の程度を示すグラフ。FIG. 3 is a graph showing pH values and activities of catalase used in the present invention and conventional catalase.
【図4】従来の排水処理システムの概略構成図。FIG. 4 is a schematic configuration diagram of a conventional wastewater treatment system.
1 原水槽 2 空気ポンプ 3 反応槽 4、9 攪拌機 5 中和剤 6、6a カタラーゼ 7 Ca塩 8 凝集槽 10 凝集剤 11 フロック 12 沈殿槽 13 沈殿物 Reference Signs List 1 raw water tank 2 air pump 3 reaction tank 4, 9 stirrer 5 neutralizer 6, 6a catalase 7 Ca salt 8 coagulation tank 10 coagulant 11 floc 12 sedimentation tank 13 sediment
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) C02F 1/00 - 1/78 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) C02F 1/00-1/78
Claims (5)
理、その後行われるpH調整処理、含有物の不溶物化処
理を含む過酸化水素含有排水の処理方法において、前記
濃度均一化を図る処理において排水に酸性溶液において
も活性を失うことのないカタラーゼを添加して濃度均一
化と過酸化水素の水と酸素への分解処理とを同時に行う
ことを特徴とする過酸化水素含有排水の処理方法。1. A method for uniforming the concentration in a method for treating a wastewater containing hydrogen peroxide, including a treatment for uniforming the concentration by storing the solution for 5 to 6 hours , a pH adjustment treatment to be performed thereafter, and a treatment for insolubilizing the content. Concentration by adding catalase to the wastewater without losing the activity even in acidic solution
Method of processing the hydrogen peroxide-containing wastewater, which comprises carrying out reduction with hydrogen peroxide and a decomposition treatment to water and oxygen at the same time.
を図る原水槽と、原水槽から排水が供給されpH調整お
よび所定の反応が行われる反応槽と、を用いて行う過酸
化水素含有排水の処理方法において、前記原水槽内の排
水に酸性溶液においても活性を失うことのないカタラー
ゼを添加して濃度均一化と過酸化水素の分解処理とを同
時に行うことを特徴とする過酸化水素含有排水の処理方
法。2. Hydrogen peroxide which is stored in a raw water tank for storing the raw waste water for 5 to 6 hours to make the concentration uniform and a reaction tank in which waste water is supplied from the raw water tank to adjust pH and perform a predetermined reaction. In the method for treating the wastewater containing water, catalase that does not lose its activity even in an acidic solution is added to the wastewater in the raw water tank to equalize the concentration and decompose hydrogen peroxide.
A method for treating hydrogen peroxide-containing wastewater, which is carried out at times .
を図る原水槽と、原水槽から排水が供給されpH調整お
よび所定の反応が行われる反応槽と、反応槽から排水が
供給され前記反応槽での反応生成物の凝集が行われる凝
集槽と、凝集槽から排水が供給され前記凝集槽での凝集
物の沈殿が行われる沈殿槽と、を用いて行う過酸化水素
含有排水の処理方法において、前記原水槽内の排水に酸
性溶液においても活性を失うことのないカタラーゼを添
加して濃度均一化と過酸化水素の分解処理とを同時に行
うことを特徴とする過酸化水素含有排水の処理方法。3. A raw water tank for storing the raw waste water for 5 to 6 hours for uniform concentration, a reaction tank for supplying waste water from the raw water tank to perform pH adjustment and a predetermined reaction, and a waste water for supplying water from the reaction tank. Of a hydrogen peroxide-containing wastewater performed using a flocculation tank in which the reaction product is flocculated in the reaction tank, and a sedimentation tank in which wastewater is supplied from the flocculation tank and sedimentation of the flocculate in the flocculation tank is performed. In the treatment method, catalase that does not lose its activity even in an acidic solution is added to the wastewater in the raw water tank to simultaneously perform the concentration uniformization and the decomposition treatment of hydrogen peroxide.
Method of processing the hydrogen peroxide-containing wastewater, characterized in that the Hare.
していることを特徴とする請求項2または3記載の過酸
化水素含有排水の処理方法。4. The method for treating wastewater containing hydrogen peroxide according to claim 2, wherein the raw water tank has a capacity several times or more the capacity of the reaction tank.
激しい攪拌が行われることを特徴とする請求項2または
3記載の過酸化水素含有排水の処理方法。5. The method for treating wastewater containing hydrogen peroxide according to claim 2, wherein gentle stirring is performed in the raw water tank and vigorous stirring is performed in the reaction tank.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6239996A JP2957464B2 (en) | 1996-03-19 | 1996-03-19 | Treatment method for wastewater containing hydrogen peroxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6239996A JP2957464B2 (en) | 1996-03-19 | 1996-03-19 | Treatment method for wastewater containing hydrogen peroxide |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09253659A JPH09253659A (en) | 1997-09-30 |
JP2957464B2 true JP2957464B2 (en) | 1999-10-04 |
Family
ID=13199029
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Application Number | Title | Priority Date | Filing Date |
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JP6239996A Expired - Fee Related JP2957464B2 (en) | 1996-03-19 | 1996-03-19 | Treatment method for wastewater containing hydrogen peroxide |
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JP (1) | JP2957464B2 (en) |
Families Citing this family (2)
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JP5489419B2 (en) * | 2008-05-09 | 2014-05-14 | オルガノ株式会社 | Method and apparatus for treating hydrogen peroxide-containing water |
DE102012206635A1 (en) * | 2012-04-23 | 2013-10-24 | Krones Ag | Use of catalase in filling machines |
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1996
- 1996-03-19 JP JP6239996A patent/JP2957464B2/en not_active Expired - Fee Related
Also Published As
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JPH09253659A (en) | 1997-09-30 |
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