JPH06343975A - Method for clarification treatment of colored waste water - Google Patents
Method for clarification treatment of colored waste waterInfo
- Publication number
- JPH06343975A JPH06343975A JP13567693A JP13567693A JPH06343975A JP H06343975 A JPH06343975 A JP H06343975A JP 13567693 A JP13567693 A JP 13567693A JP 13567693 A JP13567693 A JP 13567693A JP H06343975 A JPH06343975 A JP H06343975A
- Authority
- JP
- Japan
- Prior art keywords
- colored
- waste water
- cement
- carbon dioxide
- colored wastewater
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は着色廃水の清澄化処理方
法に係り、特に、顔料などにより着色したセメント・コ
ンクリート製品の着色廃水等の着色廃水を容易かつ効率
的に、低コストにて清澄化して再利用可能な清澄水とす
る着色廃水の清澄化処理方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clarification treatment method for colored wastewater, and particularly to clarify colored wastewater such as colored wastewater of cement / concrete products colored with pigments easily and efficiently at low cost. TECHNICAL FIELD The present invention relates to a method for clarifying a colored wastewater that is made into clear water that can be reused.
【０００２】[0002]
【従来の技術】セメント・コンクリート製品の製造工場
或いはその他の各種産業の処理工程からは、顔料などで
着色された着色廃水が多量に排出される。これらの着色
廃水は、水資源の有効利用の面からは、清澄化すること
により工業用水等として再利用することが望ましいが、
一旦、顔料などで着色された着色廃水は、当該顔料など
の自然沈降に長時間を要することから、そのままでは清
澄水になりにくい。2. Description of the Related Art A large amount of colored wastewater colored with a pigment or the like is discharged from a cement / concrete product manufacturing plant or a treatment process of various other industries. From the viewpoint of effective use of water resources, these colored wastewaters are preferably clarified and reused as industrial water, etc.
Colored wastewater once colored with a pigment or the like is unlikely to be clear water as it is, because it takes a long time for the pigment and the like to spontaneously settle.
【０００３】従来、排出された着色廃水に各種の凝集剤
等を添加することにより、顔料の沈降速度を加速するこ
とは知られている。Conventionally, it is known to accelerate the sedimentation rate of the pigment by adding various coagulants to the discharged colored wastewater.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、凝集剤
等を用いた場合においても、顔料の沈降にはかなりの時
間を要し、短時間で清澄化することはできない。しか
も、凝集剤などの薬剤は高価であることから、処理コス
トが高くつくという問題もある。However, even when a flocculant or the like is used, it takes a considerable amount of time for the pigment to settle, and it is not possible to clarify the pigment in a short time. In addition, since a chemical such as a flocculant is expensive, there is a problem that the processing cost is high.
【０００５】本発明は上記従来の問題点を解決し、顔料
などにより着色したセメント・コンクリート製品の着色
廃水等の着色廃水を容易かつ効率的に、低コストにて清
澄化して再利用可能な清澄水とする方法を提供すること
を目的とする。The present invention solves the above-mentioned conventional problems, and clarifies colored wastewater such as colored wastewater of cement / concrete products colored with a pigment or the like easily and efficiently at low cost and can be reused. It is intended to provide a way to make water.
【０００６】[0006]
【課題を解決するための手段】請求項１の着色廃水の清
澄化処理方法は、カルシウムイオンを含む着色廃水に、
不溶性カルシウム化合物を生成させる酸物質を添加する
ことを特徴とする。A method for clarifying a colored wastewater according to claim 1 is a method for clarifying a colored wastewater containing calcium ions.
It is characterized by adding an acid substance which produces an insoluble calcium compound.
【０００７】請求項２の着色廃水の清澄化処理方法は、
請求項１の方法において、酸物質が炭酸ガスであること
を特徴とする。A method for clarifying colored wastewater according to claim 2 is as follows:
The method according to claim 1, wherein the acid substance is carbon dioxide gas.
【０００８】請求項３の着色廃水の清澄化処理方法は、
請求項１の方法において、酸物質が硫黄分含有物である
ことを特徴とする。The clarification treatment method of the colored wastewater according to claim 3 comprises:
The method according to claim 1, wherein the acid substance is a sulfur-containing substance.
【０００９】以下に本発明を詳細に説明する。The present invention will be described in detail below.
【００１０】本発明において、カルシウムイオンを含む
着色廃水に添加する、該着色廃水中に不溶性カルシウム
化合物を生成させる酸物質としては、好ましくは炭酸ガ
ス又は硫酸等の硫黄分含有物が挙げられる。In the present invention, the acid substance which is added to the colored wastewater containing calcium ions and produces an insoluble calcium compound in the colored wastewater is preferably a sulfur-containing substance such as carbon dioxide or sulfuric acid.
【００１１】特に、炭酸ガスを用いる場合には、炭酸ガ
スを着色廃水に吹き込むことにより容易に顔料等の着色
成分を凝集沈降させることができ、作業性良く清澄化処
理することができる。使用する炭酸ガスとしては、市販
品のほか、各種の燃焼装置から排出される炭酸ガス含有
排ガスなどを使用することもできる。なお、この場合、
水溶性の炭酸塩類、若しくは炭酸塩類、例えば、炭酸カ
リウム、炭酸ナトリウム等を含有する物質を併用するこ
ともできる。In particular, when carbon dioxide gas is used, it is possible to easily cause the coloring components such as pigments to coagulate and settle by blowing carbon dioxide gas into the coloring wastewater, and the clarification treatment can be performed with good workability. As the carbon dioxide gas to be used, not only commercially available products, but also carbon dioxide gas-containing exhaust gas discharged from various combustion devices can be used. In this case,
A water-soluble carbonate or a substance containing a carbonate, such as potassium carbonate or sodium carbonate, may be used in combination.
【００１２】一方、硫黄分含有物としては、市販品の硫
酸ほか、例えば、ボイラー排ガス等の硫黄分を含むガス
及び液体等を使用することができる。On the other hand, as the sulfur-containing material, in addition to commercially available sulfuric acid, for example, gas and liquid containing sulfur, such as boiler exhaust gas, can be used.
【００１３】炭酸ガス又は硫酸などの硫黄分含有物等の
酸物質の添加量は、被処理着色廃水の着色度に応じて適
宜決定されるが、例えば、セメント・コンクリート製品
の製造工場から排出される着色廃水であれば、廃水１リ
ットルに対して、炭酸ガスではＣＯ2 として０．１〜
５．０ｇ、硫酸ではＨ2 ＳＯ4 として１．０〜１０．０
ｇ程度添加するのが好ましい。The amount of addition of an acid substance such as carbon dioxide or a sulfur-containing substance such as sulfuric acid is appropriately determined according to the degree of coloring of the treated colored wastewater. For example, it is discharged from a cement / concrete product manufacturing plant. If it is a colored wastewater, 1 liter of wastewater is added to CO 2 of 0.1 to 2 as CO 2.
5.0 g, with sulfuric acid 1.0 to 10.0 as H 2 SO 4 .
It is preferable to add about g.
【００１４】本発明の方法に従って、着色廃水に炭酸ガ
スや硫酸等の酸物質を添加することにより、着色廃水中
の顔料等の着色成分が速やかに凝集沈降するため、沈降
分離により得られる上澄水を工業用水等として有効に再
利用することができる。By adding an acid substance such as carbon dioxide or sulfuric acid to the colored wastewater according to the method of the present invention, colored components such as pigments in the colored wastewater are rapidly aggregated and settled. Can be effectively reused as industrial water or the like.
【００１５】なお、本発明において被処理対象とするカ
ルシウムイオンを含む着色廃水としては、セメント・コ
ンクリート製品の製造工場から排出される着色廃水が挙
げられるが、その他、繊維関係工場（パルプ、製紙、織
物、染色）等から排出される着色廃水にも本発明は有効
に適用可能である。The colored wastewater containing calcium ions to be treated in the present invention includes colored wastewater discharged from a cement / concrete product manufacturing plant. In addition, other textile-related plants (pulp, papermaking, The present invention can be effectively applied to colored wastewater discharged from textiles, dyeing, etc.
【００１６】[0016]
【作用】本発明方法による清澄化作用の機構は次のよう
に推察される。即ち、セメント・コンクリート製品の製
造工場等から排出された、カルシウムイオンを含み、か
つ顔料等により着色された着色廃水に炭酸ガスを吹き込
むと、この炭酸ガスとカルシウム化合物、即ち、セメン
トの水和過程で副産する水酸化カルシウムとが反応し、
炭酸カルシウムが生成するが、この炭酸カルシウムが凝
集沈降する際に、顔料等の着色成分も吸着されて共沈す
る。The mechanism of the clarification action by the method of the present invention is presumed as follows. That is, when carbon dioxide is blown into colored wastewater containing calcium ions and colored with a pigment or the like, which is discharged from a cement / concrete product manufacturing plant, the carbon dioxide and calcium compound, that is, the hydration process of cement. Reacts with by-product calcium hydroxide,
Calcium carbonate is produced, but when this calcium carbonate aggregates and precipitates, coloring components such as pigments are also adsorbed and coprecipitated.
【００１７】このような顔料等の着色成分の吸着、共沈
は、炭酸ガスに限らず、不溶性カルシウム化合物を生成
させる酸物質を添加することにより生起させることがで
き、硫酸等の他の物質を添加した場合においても効果的
な清澄化作用を得ることができる。Adsorption and coprecipitation of coloring components such as pigments can be caused not only by carbon dioxide gas but also by addition of an acid substance which produces an insoluble calcium compound, and other substances such as sulfuric acid. Even when added, an effective clarification action can be obtained.
【００１８】[0018]
【実施例】以下、実施例により本発明をより詳細に説明
するが、本発明はその要旨を超えない限り、以下の実施
例により限定されるものではない。EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.
【００１９】実施例１ 下記各成分を混合して着色廃水を調製した。この着色廃
水に炭酸ガスを０．５リットル／分の割合で吹き込んだ
ところ、約３分という短時間で廃水中に浮遊していた顔
料が凝集沈降し、清澄な上澄水が得られた。この上澄水
は何ら悪影響を与えることなく、セメント・コンクリー
ト製品の工業用水として再利用することができた。Example 1 Colored wastewater was prepared by mixing the following components. When carbon dioxide gas was blown into this colored wastewater at a rate of 0.5 liter / minute, the pigment suspended in the wastewater aggregated and settled in a short time of about 3 minutes, and clear supernatant water was obtained. This supernatant water could be reused as industrial water for cement and concrete products without any adverse effect.
【００２０】セメント： １０重量部 砂 ： ３重量部 水 ： ８２重量部 顔料 ： ５重量部 実施例２ 実施例１で調製した着色廃水に、炭酸ガスの代りに、硫
酸（５０重量％）を４．０ｇ添加して撹拌した。その結
果、約３分で廃水中に浮遊していた顔料が凝集沈降し、
清澄な上澄水が得られた。この上澄水は何ら悪影響を与
えることなく、セメント・コンクリート製品の工業用水
として再利用することができた。Cement: 10 parts by weight Sand: 3 parts by weight Water: 82 parts by weight Pigment: 5 parts by weight Example 2 The colored wastewater prepared in Example 1 was mixed with 4% sulfuric acid (50% by weight) instead of carbon dioxide. 0.0 g was added and stirred. As a result, in about 3 minutes the pigments that had floated in the wastewater aggregated and settled,
Clear clear water was obtained. This supernatant water could be reused as industrial water for cement and concrete products without any adverse effect.
【００２１】[0021]
【発明の効果】以上詳述した通り、本発明の着色廃水の
清澄化処理方法によれば、カルシウムイオンを含む着色
廃水に酸物質として炭酸ガスを吹き込む或いは硫酸を添
加するなどの簡単な処理により、着色廃水を短時間で効
率的にしかも安価に清澄水とすることができる。本発明
方法により清澄化された清澄水は、何ら悪影響を与える
ことなく、セメント・コンクリート製品の工業用水等と
して有効に再利用することができる。As described in detail above, according to the clarification treatment method of the colored wastewater of the present invention, a simple treatment such as blowing carbon dioxide gas as an acid substance or adding sulfuric acid to the colored wastewater containing calcium ions is carried out. The colored wastewater can be clarified efficiently in a short time, at low cost. The clarified water clarified by the method of the present invention can be effectively reused as industrial water for cement / concrete products without any adverse effect.
Claims (3)
溶性カルシウム化合物を生成させる酸物質を添加するこ
とを特徴とする着色廃水の清澄化処理方法。1. A method for clarifying a colored wastewater, comprising adding an acid substance which produces an insoluble calcium compound to the colored wastewater containing calcium ions.
ガスであることを特徴とする着色廃水の清澄化処理方
法。2. The method for clarification treatment of colored wastewater according to claim 1, wherein the acid substance is carbon dioxide gas.
分含有物であることを特徴とする着色廃水の清澄化処理
方法。3. The method for clarification of colored wastewater according to claim 1, wherein the acid substance is a sulfur-containing substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13567693A JPH06343975A (en) | 1993-06-07 | 1993-06-07 | Method for clarification treatment of colored waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13567693A JPH06343975A (en) | 1993-06-07 | 1993-06-07 | Method for clarification treatment of colored waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06343975A true JPH06343975A (en) | 1994-12-20 |
Family
ID=15157328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13567693A Withdrawn JPH06343975A (en) | 1993-06-07 | 1993-06-07 | Method for clarification treatment of colored waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06343975A (en) |
-
1993
- 1993-06-07 JP JP13567693A patent/JPH06343975A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000905 |