JP3173981B2 - Waste liquid treatment method - Google Patents
Waste liquid treatment methodInfo
- Publication number
- JP3173981B2 JP3173981B2 JP33049595A JP33049595A JP3173981B2 JP 3173981 B2 JP3173981 B2 JP 3173981B2 JP 33049595 A JP33049595 A JP 33049595A JP 33049595 A JP33049595 A JP 33049595A JP 3173981 B2 JP3173981 B2 JP 3173981B2
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- colloid particles
- wastewater
- treatment method
- charge
- 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 - Fee Related
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Chemical Treatment Of Metals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、塗装工程で生じる
水洗廃液や化成廃液あるいは機械加工工程等で生じるク
ーラント廃液や洗浄廃液などの廃液処理技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for treating a waste liquid such as a washing waste liquid or a chemical waste liquid generated in a coating process, a coolant waste liquid or a cleaning waste liquid generated in a machining process or the like.
【０００２】[0002]
【従来の技術】塗装工程では、リン酸亜鉛被膜処理後の
化成廃液や電着塗装物の水洗廃液が多量に生じる。従来
はこの廃液を単独であるいは混合して廃液処理してい
る。この廃液処理では、それぞれ単独で処理する方式で
あれ、混合して処理する方式であれ、硫酸鉄やポリ硫酸
鉄等の凝集剤と水酸化カルシウム等のpH調整剤を使用
し、廃液中のコロイド粒子を水酸化鉄に巻き込んで凝集
させたうえで除去する。2. Description of the Related Art In a coating process, a large amount of a chemical waste liquid after a zinc phosphate coating treatment and a water washing waste liquid of an electrodeposition coated product are generated. Conventionally, this waste liquid is treated alone or as a mixture. In this waste liquid treatment, whether it is a method of treating each alone or a method of mixing and treating, a coagulant such as iron sulfate or polysulfate and a pH adjuster such as calcium hydroxide are used, and the colloid in the waste liquid is used. The particles are removed by being entangled in iron hydroxide and agglomerated.
【０００３】また機械加工工程等では、クーラント廃液
や洗浄廃液が生じる。従来はこの廃液を硫酸アルミニウ
ム等の凝集剤と水酸化ナトリウム等のpH調整剤を使用
し、廃液中のコロイド粒子を水酸化アルミニウムに巻き
込んで凝集させたうえで除去する。このように従来の廃
液処理技術では、電着塗装水洗廃液と化成廃液のグルー
プと、クーラント廃液と洗浄廃液のグループとを別々に
処理し、それぞれに凝集剤とpH調整剤を加えて処理して
いる。[0003] In the machining process and the like, a coolant waste liquid and a washing waste liquid are generated. Conventionally, this waste liquid is removed by using a flocculant such as aluminum sulfate and a pH adjuster such as sodium hydroxide, so that the colloidal particles in the waste liquid are entangled with aluminum hydroxide and aggregated, and then removed. As described above, in the conventional waste liquid treatment technology, the group of the electrodeposition coating water washing waste liquid and the chemical waste liquid, and the group of the coolant waste liquid and the cleaning waste liquid are separately treated, and each is treated by adding a flocculant and a pH adjuster. I have.
【０００４】[0004]
【発明が解決しようとする課題】各グループの廃液を別
々に処理する従来の技術によると、多量の薬剤を使用す
る必要があり、かつ多量の汚泥が発生してしまう。本発
明では、双方のグループを一度に処理すると、凝集増感
作用が得られることに着目し、少量の薬剤の使用で足
り、しかも発生する汚泥量を減少させることのできる新
たな処理技術を開発したものである。According to the conventional technique of separately treating the waste liquid of each group, a large amount of chemical must be used and a large amount of sludge is generated. In the present invention, attention has been paid to the fact that coagulation sensitization can be obtained by treating both groups at once, and a new treatment technique has been developed that can use only a small amount of chemicals and reduce the amount of generated sludge. It was done.
【０００５】[0005]
【課題を解決するための手段】一つの方法では、電着塗
装水洗廃液および／または化成廃液に、クーラント廃液
および／または洗浄廃液と、陰イオンを含む凝集剤とを
加えて、各廃液に含まれているコロイド粒子を凝集させ
ることを特徴とする。In one method, a coolant wastewater and / or a washing wastewater and a flocculant containing an anion are added to an electrodeposition coating washing wastewater and / or a chemical wastewater, and the wastewater is contained in each wastewater. It is characterized in that the colloidal particles are aggregated.
【０００６】電着塗装廃液および／または化成廃液は通
常プラスに帯電した疎水性コロイド粒子を含んでおり、
一方、クーラント廃液および／または洗浄廃液は通常マ
イナスに帯電した親水性コロイド粒子を含んでいる。そ
こで両廃液を混合すると、電荷が相殺され、ゼータ電位
が減少して各コロイド粒子の安定度が減少する。この結
果、各コロイド粒子は凝集し易くなり（すなわち凝集増
感作用が得られ）、少量の陰イオンを含む凝集剤によっ
て効果的に凝集する。このため、廃液処理に使用する薬
剤の量と発生する汚泥の量がいずれも少なくてすむこと
になる。[0006] Electrodeposition coating effluents and / or chemical effluents usually contain positively charged hydrophobic colloid particles,
On the other hand, the coolant waste liquid and / or the washing waste liquid usually contain negatively charged hydrophilic colloid particles. Then, when the two waste liquids are mixed, the charges are offset, the zeta potential is reduced, and the stability of each colloid particle is reduced. As a result, the respective colloid particles are easily aggregated (that is, an aggregation sensitizing effect is obtained), and are effectively aggregated by an aggregating agent containing a small amount of anions. For this reason, both the amount of the chemical used for waste liquid treatment and the amount of generated sludge can be reduced.
【０００７】上記の方法において、イオウ原子を配位基
とするキレート剤をも加えることが効果的である。この
ようにすると、各廃液に含まれる金属イオン中、除去の
必要性の高いＰｂ，Ｚｎ，Ｃｕ等がイオウ配位基によっ
て効果的にキレートされて除去される一方、除去の必要
性の低いＦｅ，Ａｌ等のキレートのためにキレート剤が
無駄に消費されることが防止でき、少量のキレート剤で
除去の必要性の高い金属を効果的に除去できる。In the above method, it is effective to add a chelating agent having a sulfur atom as a coordinating group. In this way, among the metal ions contained in each waste liquid, Pb, Zn, Cu, etc., which need to be removed, are effectively chelated by the sulfur coordination group and removed, while Fe, which does not need to be removed, is reduced. , Al and the like can be prevented from being wastefully consumed by the chelating agent, and a metal that needs to be removed can be effectively removed with a small amount of the chelating agent.
【０００８】また、本発明に係わる方法では、プラス又
はマイナスの電荷を持つコロイド粒子を含む第１廃液
に、前記電荷と異種の電荷を持つコロイド粒子を含む第
１廃液より少量の第２廃液と、前記第２廃液と同種の電
荷を持つ凝集剤とを加えて、前記第１廃液中のコロイド
粒子と前記第２廃液中のコロイド粒子を凝集させること
を特徴とする。[0008] In the method according to the present invention, the first waste liquid containing colloid particles having a positive or negative charge may include a second waste liquid having a smaller amount than the first waste liquid containing colloid particles having a charge different from the charge. And a coagulant having the same kind of charge as the second waste liquid is added to aggregate the colloid particles in the first waste liquid and the colloid particles in the second waste liquid.
【０００９】プラス又はマイナスの電荷を持つコロイド
粒子を含む第１廃液に、それとは異なる電荷を持つコロ
イド粒子を含む第２廃液を少量加えると、第１廃液中の
コロイド粒子の電荷が相殺されてそのコロイド粒子の安
定度が減少する。この結果、各コロイド粒子は凝集し易
くなり（すなわち凝集増感作用が得られ）、第１廃液と
は異種の電荷を持つ凝集剤を少量加えるだけで、各廃液
に含まれるコロイド粒子が効果的に凝集する。When a small amount of a second waste liquid containing colloid particles having a different charge is added to the first waste liquid containing colloid particles having a positive or negative charge, the charge of the colloid particles in the first waste liquid is offset. The stability of the colloidal particles is reduced. As a result, each of the colloidal particles is easily aggregated (that is, an aggregation sensitizing effect is obtained), and the colloidal particles contained in each of the waste liquids are effectively reduced only by adding a small amount of a coagulant having a charge different from that of the first waste liquid. Agglomerates.
【００１０】特に、第１廃液がプラス電荷の疎水性コロ
イド粒子を含み、第２廃液がマイナス電荷の親水性コロ
イド粒子を含む場合に、多価のマイナス電荷を持つ凝集
剤を加えると、疎水性コロイド粒子と親水性コロイド粒
子の両者が効果的に凝集される。In particular, when the first waste liquid contains positively charged hydrophobic colloid particles and the second waste liquid contains negatively charged hydrophilic colloid particles, the addition of a polyvalent negatively charged flocculant results in an increase in hydrophobicity. Both the colloid particles and the hydrophilic colloid particles are effectively aggregated.
【００１１】[0011]
【発明の実施の形態】この発明は、とりわけ下記の実施
の形態をとり得る。 （形態１）カチオン電着後の電着塗装水洗廃液および／
またはリン酸亜鉛被膜処理後の化成廃液に、アニオン系
クーラント廃液および／またはアニオン系またはノニオ
ン系洗浄廃液と、アニオン系凝集剤とを加えて、各廃液
に含まれるコロイド粒子を凝集させることを特徴とす
る。 （形態２）形態１において、アニオン系凝集剤を水中で
多価イオン対を形成する凝集剤とする。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can take the following embodiments. (Form 1) Electrodeposition coating washing waste liquid after cationic electrodeposition and / or
Alternatively, an anionic coolant waste liquid and / or an anionic or nonionic washing waste liquid and an anionic flocculant are added to the chemical waste liquid after the zinc phosphate coating treatment to aggregate the colloid particles contained in each waste liquid. And (Form 2) In the form 1, the anionic coagulant is a coagulant that forms a multivalent ion pair in water.
【００１２】（形態３）形態１において、アニオン系凝
集剤を二ケイ酸塩、メタケイ酸塩、オルトケイ酸塩のう
ちの一種又は二種以上とする。 （形態４）プラス電荷の疎水性コロイド粒子を含む廃液
に、マイナス電荷の親水性コロイド粒子を含む少量の廃
液と、二ケイ酸ナトリウムとを加えて、両コロイド粒子
を凝集させる。(Embodiment 3) In the embodiment 1, the anionic coagulant is one or more of disilicate, metasilicate and orthosilicate. (Mode 4) A small amount of waste liquid containing negatively charged hydrophilic colloid particles and sodium disilicate are added to waste liquid containing positively charged hydrophobic colloid particles, and both colloid particles are aggregated.
【００１３】（実施例）次にこの発明の実施例を説明す
る。 （処理する第１の廃液グループ）カチオン電着塗装ライ
ンでは、電着塗装物の水洗過程で電着塗装水洗廃液が多
量に生じる。この廃液を処理対象の一つの廃液とする。
この廃液は、被塗装物をマイナス極とし、そこにカチオ
ン電着した塗装物を水洗する過程で生じるものであり、
プラスに帯電した樹脂の微細浮遊物を疎水性コロイド粒
子として多量に含んでいる。なおこのコロイド粒子がプ
ラス電荷を帯びていることは、 (1)電気泳動に於て、コロイド粒子は陰極に向って泳動
し、陽極側は透明化し、陰極側は密となる。 (2)アニオンを加えると凝集し、カチオンには凝集しな
い。 (3)アニオン界面活性剤を加えて顕微鏡でみると、凝結
の様が観察される。 こと等から確認される。塗装工程では、リン酸亜鉛被膜
処理によって化成廃液も生じる。この化成廃液を前記電
着塗装水洗廃液に混ぜて処理することもできる。(Embodiment) Next, an embodiment of the present invention will be described. (First waste liquid group to be treated) In the cationic electrodeposition coating line, a large amount of electrodeposition coating washing waste liquid is generated in the process of washing the electrodeposited product. This waste liquid is used as one waste liquid to be treated.
This waste liquid is generated in the process of washing the object to be coated with the negative electrode, and the coated object cationically electrodeposited thereon with water,
It contains a large amount of positively charged fine resin suspended particles as hydrophobic colloid particles. The fact that the colloid particles have a positive charge is as follows. (1) In the electrophoresis, the colloid particles migrate toward the cathode, the anode side becomes transparent, and the cathode side becomes dense. (2) When anions are added, they aggregate and do not aggregate with cations. (3) When observed under a microscope with the addition of an anionic surfactant, coagulation is observed. It is confirmed from things. In the coating process, a chemical wastewater is also generated by the zinc phosphate coating treatment. This chemical conversion waste liquid can be mixed with the above-mentioned electrodeposition coating water washing waste liquid for treatment.
【００１４】（処理する第２の廃液グループ）洗浄工程
では、洗浄廃液が発生する。一般に洗浄浴の主剤はアニ
オン系界面活性剤、ノニオン系界面活性剤もしくは両者
の混合から成り立っており、マイナスに帯電したコロイ
ド粒子を含んでいる。また機械加工工程では、クーラン
ト廃液が発生する。このクーラント廃液は通常鉱油をア
ニオン系界面活性剤でエマルション化した系の中に脂肪
酸塩、多価アルコール類、少量のアミン類などが混合さ
れている。アミン以外の溶解物質はマイナスに帯電した
親水性コロイド粒子を形成する。アミン自体はプラスに
帯電するものの、マイナスに帯電したコロイド粒子に吸
着し、全体としてはマイナスに帯電したコロイド粒子を
形成する。鉱油をエマルション化するために、ノニオン
系界面活性剤が用いられるクーラントの場合にも、電気
二重層によってマイナスに帯電したコロイド粒子が形成
される。洗浄廃液および／またはクーラント廃液を処理
する第２の廃液グループとする。(Second Waste Liquid Group to be Treated) In the cleaning step, cleaning waste liquid is generated. In general, the main component of the washing bath is composed of an anionic surfactant, a nonionic surfactant or a mixture of both, and contains colloidal particles that are negatively charged. In the machining process, coolant waste liquid is generated. This coolant waste liquid usually contains a fatty acid salt, a polyhydric alcohol, a small amount of an amine, and the like mixed in a system in which mineral oil is emulsified with an anionic surfactant. Dissolved substances other than amines form negatively charged hydrophilic colloid particles. Although the amine itself is positively charged, it is adsorbed by the negatively charged colloidal particles to form negatively charged colloidal particles as a whole. Even in the case of a coolant in which a nonionic surfactant is used to emulsify mineral oil, negatively charged colloid particles are formed by the electric double layer. A second waste liquid group for treating the cleaning waste liquid and / or the coolant waste liquid.
【００１５】（処理過程）第１グループの廃液の２００
０mlに対し、第２グループの廃液５７mlと、１０％の二
ケイ酸ナトリウム２mlと酸化アルミ（Ａｌ2 Ｏ3 ）濃度
８％の硫酸バンド１．０mlと０．１％の高分子凝集剤２
mlとを加えて攪拌したところ、第１グループの廃液と第
２グループの廃液に含まれていたコロイド粒子は沈殿し
た。沈殿した汚泥の乾燥重量は０．７３１ｇであった。
この汚泥の量は、後記する従来技術によるときの４４％
であり、汚泥の量は半分以下となる。(Processing process) 200 of waste liquid of the first group
For 0 ml, 57 ml of waste liquid of the second group, 2 ml of 10% sodium disilicate, 1.0 ml of a sulfuric acid band having an aluminum oxide (Al 2 O 3 ) concentration of 8%, and 0.1% of a polymer flocculant 2
When the mixture was added and stirred, the colloid particles contained in the waste liquid of the first group and the waste liquid of the second group precipitated. The dry weight of the settled sludge was 0.731 g.
This amount of sludge is 44% of that of the prior art described later.
And the amount of sludge is less than half.
【００１６】二ケイ酸ナトリウムは、水溶液中で２価の
イオン対を形成する凝集剤であり、第２グループの廃液
に含まれるマイナス粒子によって安定度の減少した、第
１グループの廃液に含まれるプラス粒子をイオン対とし
て効果的に補足して凝集させる。なお二ケイ酸ナトリウ
ム以外の二ケイ酸塩、あるいはメタケイ酸塩、オルトケ
イ酸塩によっても凝集させることが可能であるが、とり
わけ二ケイ酸ナトリウムが効果的に凝集させる。二ケイ
酸ナトリウムは溶液中においてそれ自体が集合して多価
・多量体となり、より効果的な凝集力を発揮する。硫酸
バンドと高分子凝集剤は、二ケイ酸ナトリウムで凝集し
たコロイド粒子の凝集物を、さらに凝集してフロックと
して沈殿させる。硫酸バンドは水質向上作用をも営む。[0016] Sodium disilicate is a flocculant which forms a divalent ion pair in an aqueous solution, and is contained in the first group waste liquid whose stability has been reduced by negative particles contained in the second group waste liquid. Positive particles are effectively captured and aggregated as ion pairs. In addition, it is possible to coagulate with a disilicate other than sodium disilicate, or a metasilicate or an orthosilicate, but particularly, sodium disilicate coagulates effectively. Sodium disilicate itself assembles into polyvalent and multimeric forms in a solution, and exhibits more effective cohesion. The sulfate band and the polymer flocculant further aggregate the flocculated particles of the colloid particles aggregated with sodium disilicate to precipitate as flocs. The sulfate band also has an effect of improving water quality.
【００１７】（比較例）第１グループの廃液２０００ml
を従来の方式で処理する場合には、１２％の硫酸鉄６．
７mlと２％の消石灰１２mlと０．１％の高分子凝集剤８
mlが必要とされ、０．５４２ｇの汚泥が発生した。第２
グループの廃液５７mlを従来の方式で処理する場合に
は、酸化アルミ（Ａｌ2 Ｏ3 ）濃度８％の硫酸バンド
１．７５mlと１０％の苛性ソーダ０．２３mlと０．４％
の高分子凝集剤０．２３mlが必要とされ、汚泥発生量は
１．１３３ｇであった。すなわち、２０００mlの第１廃
液と５７mlの第２廃液を別々に処理すると、計１．６７
５ｇの汚泥が発生する。本処理技術によれば、０．７３
１ｇ（従来技術によるときの４４％）の汚泥しか発生し
ない。(Comparative Example) 2000 ml of waste liquid of the first group
When treated with conventional methods, 12% iron sulfate
7 ml and 2% slaked lime 12 ml and 0.1% polymer flocculant 8
ml were required and 0.542 g of sludge was generated. Second
If the waste liquid of the group is treated in a conventional manner, 1.75 ml of a sulfuric acid band having an aluminum oxide (Al 2 O 3 ) concentration of 8%, 0.23 ml of a 10% caustic soda and 0.4%
0.23 ml of the polymer flocculant was required, and the amount of generated sludge was 1.133 g. That is, when 2000 ml of the first waste liquid and 57 ml of the second waste liquid are separately treated, a total of 1.67 is obtained.
5 g of sludge is generated. According to this processing technology, 0.73
Only 1 g (44% according to the prior art) of sludge is generated.
【００１８】（他の実施例）電着塗装水洗廃液には、Ｐ
ｂ，Ｚｎ等の重金属イオンが含まれている。この場合、
Ｓを配置原子とする疎水基を含むキレート剤をも加え
る。キレート剤は第１廃液に加えておいてついで第２廃
液を加えてもよく、第１廃液に第２廃液を加えたあとに
キレート剤を加えてもよい。このようにすると、Ｐｂ，
Ｚｎ等の重金属はキレートされ、このキレート化合物が
凝集剤に包含されるために、重金属が水から分離され
る。なお配位基としてＯ- ，ＣＯＯ- ，Ｓ- ，Ｎを有す
るものであれば、金属をキレートするが、特にＳないし
Ｓ- を配位原子とするものは、ＦｅやＡｌよりもＰｂや
Ｚｎなどを安定的にキレートする特性があり、加えたキ
レート剤がＦｅやＡｌのキレートのために浪費されるこ
とがなく、ＰｂやＺｎを効果的に除去する。このためＳ
ないしＳ- を配位原子とするものは少量を添加するだけ
でＰｂやＺｎを除去することができる。(Other Embodiments) The electrodeposition coating washing waste liquid contains P
Heavy metal ions such as b and Zn are contained. in this case,
A chelating agent containing a hydrophobic group having S as a configuration atom is also added. The chelating agent may be added to the first waste liquid and then the second waste liquid may be added, or the chelating agent may be added after the second waste liquid is added to the first waste liquid. In this way, Pb,
Heavy metals such as Zn are chelated and the heavy metals are separated from water because the chelating compound is included in the flocculant. Incidentally O as coordinating groups -, COO -, S -, as long as it has a N, but chelate metal, in particular to no S S - Those in a coordination atom, than Fe and Al Pb and Zn It has the property of stably chelating Pb and Zn, and effectively removes Pb and Zn without the added chelating agent being wasted due to chelation of Fe or Al. Therefore S
Pb and Zn can be removed only by adding a small amount of those having S - as a coordinating atom.
【００１９】上述の実施例では、プラスの電荷をもつコ
ロイド粒子を含む第１廃液に、マイナスの電荷をもつコ
ロイド粒子を含む少量の第２廃液と、マイナスの電荷を
持つ凝集剤とを加える例について説明したが、第１の廃
液のコロイド粒子がマイナスに帯電している場合には、
第２の廃液としてプラスに帯電しているコロイド粒子を
含むものを選択し、又プラス電荷を持つ凝集剤を加え
る。この場合にも、異電荷による凝集増感作用が得ら
れ、少量の薬剤で処理でき、発生する汚泥量も少なくす
ることができる。In the above embodiment, a small amount of the second waste liquid containing the negatively charged colloidal particles and the negatively charged flocculant are added to the first waste liquid containing the positively charged colloidal particles. However, when the colloid particles of the first waste liquid are negatively charged,
As the second waste liquid, a liquid containing positively charged colloid particles is selected, and a flocculant having a positive charge is added. Also in this case, the aggregation sensitization effect due to the different charges can be obtained, the treatment can be performed with a small amount of the chemical, and the amount of generated sludge can be reduced.
【００２０】（焼却処理後の灰分量）発生した汚泥は焼
却処理されるのが一般的であるが、焼却後さらに残った
灰は埋め立て処理されることになる。本発明により第一
グループの廃液２０００mlと第二グループの廃液５７ml
を処理した場合の汚泥量は０．７３１ｇとなるが、これ
を焼却した場合の灰分量は０．２５ｇとなり従来技術に
よる灰分量の３０％以下の灰分量しか発生しない。以
下、その例を示す。(Amount of ash after incineration) The generated sludge is generally incinerated, but the remaining ash after incineration is landfilled. According to the invention, 2000 ml of first group waste and 57 ml of second group waste
The amount of sludge when treated is 0.731 g, but the amount of ash when incinerated becomes 0.25 g, which is less than 30% of the ash amount according to the prior art. The following is an example.
【００２１】（本実施例の灰分量）第一グループの廃液
２０００mlと第二グループの廃液５７mlの中へ１０％の
二ケイ酸ナトリウム２mlを加えた場合、およびそれに
Ａｌ2 Ｏ3 濃度８％の硫酸バンド１mlを加えた場合、
の生成物質・焼却生成物質および焼却灰分量を次に示
す。 生成物質 焼却生成物質 焼却灰分量 Ｈ2 Ｓｉ2 Ｏ5 Ｈ2 Ｓｉ2 Ｏ5 ０．１６ｇ Ａｌ（ＯＨ）3 Ａｌ2 Ｏ3 ０．０９ｇ ＋の焼却灰分量＝０．２５ｇとなる。 ＊第一グループの廃液、第二グループの廃液および０．
１％濃度の高分子凝集剤はすべて有機化合物であり、焼
却によりＣＯ2 ，Ｈ2 Ｏおよび極少量のＮＯ2 として発
散し灰として残らない。(Ash content in the present embodiment) When 2 ml of 10% sodium disilicate was added to 2000 ml of the waste liquid of the first group and 57 ml of the waste liquid of the second group, and when the Al 2 O 3 concentration was 8%. When 1 ml of sulfuric acid band is added,
The following table shows the amount of incinerated substances and incinerated ash. The product material incineration generating material ash content H 2 Si 2 O 5 H 2 Si 2 O 5 0.16g Al (OH) 3 Al 2 O 3 0.09g + of ash content = 0.25 g. * First group wastewater, second group wastewater and 0.
The 1% concentration of the polymer flocculant is an organic compound, and is emitted as CO 2 , H 2 O and a very small amount of NO 2 by incineration, and does not remain as ash.
【００２２】（従来技術による灰発生量）第一グループ
の廃液２０００mlに１２％の硫酸鉄６．７mlを加えた場
合、およびそれに２％の消石灰１２mlを加えた場合
、の生成物質・焼却生成物質および焼却灰分量を次に
示す。 生成物質 焼却生成物質 焼却灰分量 Ｆｅ（ＯＨ）2 Ｆｅ2 Ｏ3 ０．２５ｇ ＣａＳＯ4 ＣａＳＯ4 ０．４４ｇ ＊第二グループの廃液５７mlにＡｌ2 Ｏ3 濃度８％の硫
酸バンド１．７５mlを加えた場合、の生成物・焼却生
成物および焼却灰量を次に示す。 生成物質 焼却生成物質 焼却灰分量 Ａｌ（ＯＨ）3 Ａｌ2 Ｏ3 ０．１６ｇ ＋＋の焼却灰分量＝０．８５ｇとなる。結局本実
施例と従来技術の灰分量比＝０．２５ｇ／０．８５ｇ＝
２９．４％となる。(Amount of ash generated by the prior art) Product and incineration product when 6.7 ml of 12% iron sulfate was added to 2000 ml of waste liquid of the first group, and 12 ml of 2% slaked lime was added thereto The incineration ash content is shown below. Produced substance Incinerated product Incinerated ash content Fe (OH) 2 Fe 2 O 3 0.25 g CaSO 4 CaSO 4 0.44 g * To 75 ml of the waste liquid of the second group, 1.75 ml of a sulfuric acid band having an Al 2 O 3 concentration of 8% was added. The following table shows the products, incineration products, and incineration ash amounts in the case of Generated substance Incinerated substance Incinerated ash content Al (OH) 3 Al 2 O 3 0.16 g ++ Incinerated ash content = 0.85 g. After all, the ash content ratio of this example and the prior art = 0.25 g / 0.85 g =
It becomes 29.4%.
【００２３】[0023]
【発明の効果】本発明は、プラスのコロイド粒子を含む
廃液とマイナスのコロイド粒子を含む廃液とを別々に処
理することに代えて一緒に処理すると、異電荷の粒子が
吸引しあって安定度が低くなって凝集増感作用が得られ
ることに着目して一緒に処理するようにしたために、少
量の薬剤で処理でき、しかも発生する汚泥の量も減少で
きるようにしたものであり、その実際的効果は極めて大
きい。しかも凝集にあたっては、ケイ酸塩等の安価で安
定な材料が使用できるために、安価に安全に廃液を処理
できるようになる。According to the present invention, when the waste liquid containing the positive colloid particles and the waste liquid containing the negative colloid particles are processed separately instead of separately, the particles having different charges are attracted to each other, and the stability is improved. The co-treatment was carried out with a focus on the fact that the cohesion sensitization effect was obtained due to a reduction in the amount of sludge that could be processed with a small amount of chemicals. The effect is extremely large. In addition, in coagulation, a low-cost and stable material such as silicate can be used, so that the waste liquid can be treated at low cost and safely.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 直樹 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 安藤 健吾 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 河原 文雄 愛知県豊田市柿本町７丁目16番地１ 株 式会社メックインターナショナル内 (72)発明者 伴野 満 愛知県豊田市柿本町７丁目16番地１ 株 式会社メックインターナショナル内 (72)発明者 尾嶋 平次郎 愛知県刈谷市下重原町４−７ 審査官 鈴木 正紀 (56)参考文献 特開 昭54−7756（ＪＰ，Ａ) 特開 昭61−183481（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C25D 13/00 B01D 21/01 C02F 1/52 C23C 22/86 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoki Abe 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Kengo Ando 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation ( 72) Inventor Fumio Kawahara 7-16-1, Kakimoto-cho, Toyota City, Aichi Prefecture, within Mec International Co., Ltd. Inventor Heijiro Ojima 4-7 Shimoshigehara-cho, Kariya-shi, Aichi Examiner Masaki Suzuki (56) References JP-A-54-7756 (JP, A) JP-A-61-183481 (JP, A) (58) Field (Int.Cl. 7 , DB name) C25D 13/00 B01D 21/01 C02F 1/52 C23C 22/86
Claims (4)
液に、 クーラント廃液および／または洗浄廃液と、 陰イオンを含む凝集剤とを加えて、 コロイド粒子を凝集させることを特徴とする廃液処理方
法。1. A wastewater treatment method comprising the steps of: adding a coolant wastewater and / or a washing wastewater and an anion-containing coagulant to an electrodeposition coating water washing wastewater and / or a chemical wastewater to aggregate the colloid particles. .
て、 さらにイオウ原子を配位基とするキレート剤を加えるこ
とを特徴とする廃液処理方法。2. The waste liquid treatment method according to claim 1, further comprising adding a chelating agent having a sulfur atom as a coordinating group.
ド粒子を含む第１廃液に、 前記電荷と異種の電荷を持つコロイド粒子を含む第１廃
液より少量の第２廃液と、 前記第２廃液と同種の電荷を持つ凝集剤とを加えて、 前記第１廃液中のコロイド粒子と前記第２廃液中のコロ
イド粒子を凝集させることを特徴とする廃液処理方法。3. A first waste liquid containing colloid particles having a positive or negative charge, a second waste liquid having a smaller amount than the first waste liquid containing a colloid particle having a charge different from the electric charge, and the same kind as the second waste liquid. A wastewater treatment method comprising: adding a flocculant having the following electric charge to aggregate the colloid particles in the first waste liquid and the colloid particles in the second waste liquid.
含む第１廃液に、 マイナス電荷を持つ親水性コロイド粒子を含む第２廃液
と、 多価のマイナス電荷を持つ凝集剤とを加えて、 プラスの疎水性コロイド粒子とマイナスの親水性コロイ
ド粒子を凝集させることを特徴とする廃液処理方法。4. A first waste liquid containing hydrophobic colloid particles having a positive charge, a second waste liquid containing hydrophilic colloid particles having a negative charge, and a coagulant having a polyvalent negative charge are added. A waste liquid treatment method comprising aggregating hydrophobic colloid particles and negative hydrophilic colloid particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33049595A JP3173981B2 (en) | 1995-12-19 | 1995-12-19 | Waste liquid treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33049595A JP3173981B2 (en) | 1995-12-19 | 1995-12-19 | Waste liquid treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09170098A JPH09170098A (en) | 1997-06-30 |
| JP3173981B2 true JP3173981B2 (en) | 2001-06-04 |
Family
ID=18233264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33049595A Expired - Fee Related JP3173981B2 (en) | 1995-12-19 | 1995-12-19 | Waste liquid treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3173981B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200483847Y1 (en) | 2015-09-22 | 2017-07-11 | 수에유 루 | Light-emitting toy module |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6730092B2 (en) * | 2016-05-26 | 2020-07-29 | 株式会社東芝 | Treatment method and treatment equipment for radioactive liquid-containing waste liquid |
| CN106542680B (en) * | 2016-10-19 | 2022-02-25 | 东莞市霖辉金属表面处理材料有限公司 | Wastewater treatment method for green and environment-friendly electrophoretic paint production |
-
1995
- 1995-12-19 JP JP33049595A patent/JP3173981B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200483847Y1 (en) | 2015-09-22 | 2017-07-11 | 수에유 루 | Light-emitting toy module |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09170098A (en) | 1997-06-30 |
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