JP2010184211A - Wastewater treatment method - Google Patents
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- JP2010184211A JP2010184211A JP2009030853A JP2009030853A JP2010184211A JP 2010184211 A JP2010184211 A JP 2010184211A JP 2009030853 A JP2009030853 A JP 2009030853A JP 2009030853 A JP2009030853 A JP 2009030853A JP 2010184211 A JP2010184211 A JP 2010184211A
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
Description
本発明は、廃水処理方法に関し、詳しくは水溶性アルコールを含み強酸性を示す廃水を廃水処理する方法に関する。 The present invention relates to a wastewater treatment method, and more particularly to a method for treating wastewater containing water-soluble alcohol and exhibiting strong acidity.
廃水を浄化するための廃水処理方法としては、活性汚泥処理に付す方法が広く用いられている〔特許文献１：特開２００６−４３６３０号公報〕。活性汚泥処理は、廃水を活性汚泥と接触させて、廃水に含まれる有機物等を分解する方法である。かかる活性汚泥処理に使用される設備は通常、廃水と接触する面がステンレス鋼で構成されていることから、廃水が強酸性を示す場合には、予めアルカリを加えて中和したのちに、活性汚泥処理に付されている。 As a wastewater treatment method for purifying wastewater, a method for subjecting to activated sludge treatment is widely used [Patent Document 1: Japanese Patent Application Laid-Open No. 2006-43630]. The activated sludge treatment is a method in which waste water is brought into contact with activated sludge to decompose organic substances contained in the waste water. Equipment used for such activated sludge treatment is usually made of stainless steel on the surface that comes into contact with the wastewater, so if the wastewater shows strong acidity, it must be neutralized by adding alkali in advance. It is attached to sludge treatment.
しかし、強酸性を示す廃水に水溶性アルコールが含まれる場合に、これを中和しただけで活性汚泥処理に付すと、活性汚泥の活性が低下し易く、非効率であるという問題があった。 However, when water-soluble alcohol is contained in waste water that exhibits strong acidity, if activated sludge treatment is performed only by neutralizing this, there is a problem that the activity of the activated sludge tends to decrease and is inefficient.
そこで本発明者は、多くの活性汚泥を要することなく、水溶性アルコールを含み、また強酸性を示す廃水を効率的に浄化し得る廃水処理方法を開発するべく鋭意検討した結果、本発明に至った。 Accordingly, the present inventors have intensively studied to develop a wastewater treatment method that can efficiently purify wastewater that contains water-soluble alcohol and exhibits strong acidity without requiring a large amount of activated sludge, resulting in the present invention. It was.
すなわち本発明は、水溶性アルコールを含み強酸性を示す廃水を、内面がガラスで構成された容器中、アルカリで中和して水素イオン濃度をｐＨ６〜ｐＨ８とし、
次いで加熱することにより前記水溶性アルコールを留去した後に、
活性汚泥処理に付すことを特徴とする前記廃水の廃水処理方法を提供するものである。
That is, in the present invention, waste water containing a water-soluble alcohol and showing strong acidity is neutralized with alkali in a container whose inner surface is made of glass to adjust the hydrogen ion concentration to pH 6 to pH 8,
Next, after distilling off the water-soluble alcohol by heating,
The present invention provides a wastewater treatment method for wastewater, which is subjected to activated sludge treatment.
本発明の廃水処理方法によれば、廃水に含まれる水溶性アルコールは、活性汚泥処理に付す前に留去されるので、活性汚泥の活性低下が少なく、このため効率的に廃水処理を行うことができる。 According to the wastewater treatment method of the present invention, the water-soluble alcohol contained in the wastewater is distilled off before being subjected to the activated sludge treatment, so there is little decrease in the activity of the activated sludge, and therefore the wastewater treatment can be performed efficiently. Can do.
本発明の廃水処理方法に適用される廃水は、水溶性アルコールを含むものである。
水溶性アルコールとしては、例えばメタノール、エタノール、イソプロパノールなどがあげられる。水溶性アルコールの濃度は、廃水１００質量部中に通常１質量部〜５０質量部、好ましくは５質量部〜１５質量部である。
The wastewater applied to the wastewater treatment method of the present invention contains a water-soluble alcohol.
Examples of the water-soluble alcohol include methanol, ethanol, isopropanol and the like. The density | concentration of water-soluble alcohol is 1 mass part-50 mass parts normally in 100 mass parts of wastewater, Preferably it is 5 mass parts-15 mass parts.
かかる廃水は、酸を含むことにより強酸性を示す廃水である。この廃水に含まれうる酸としては、例えば塩酸、臭化水素酸、ヨウ化水素酸などが挙げられる。 Such wastewater is wastewater that exhibits strong acidity by containing an acid. Examples of the acid that can be contained in the wastewater include hydrochloric acid, hydrobromic acid, hydroiodic acid, and the like.
この廃水の水素イオン濃度は、通常ｐＨ６以下、好ましくはｐＨ０．１〜ｐＨ５である。 The hydrogen ion concentration of this wastewater is usually pH 6 or less, preferably pH 0.1 to pH 5.
本発明の廃水処理方法では、先ず、かかる廃水をアルカリで中和する。
廃水を中和する際に使用する容器としては、内面がガラス構成されたものが用いられ、例えば通常のガラスライニングタンクなどを用いることができる。
In the wastewater treatment method of the present invention, first, such wastewater is neutralized with an alkali.
As a container used when neutralizing wastewater, a container whose inner surface is made of glass is used. For example, a normal glass lining tank can be used.
アルカリとしては、例えば水酸化ナトリウム、水酸化カリウム、水酸化カルシウムなどが挙げられる。 Examples of the alkali include sodium hydroxide, potassium hydroxide, and calcium hydroxide.
廃水をアルカリで中和するには、例えば容器に廃水を仕込み、攪拌下、アルカリを加えればよい。アルカリは通常、水に溶解したアルカリ水溶液として加えられる。 In order to neutralize the wastewater with an alkali, for example, the wastewater is charged into a container and the alkali is added with stirring. The alkali is usually added as an aqueous alkali solution dissolved in water.
中和は、大気中で行ってもよいし、窒素ガスなどのような不活性ガス雰囲気下で行ってもよい。 Neutralization may be performed in the air or in an inert gas atmosphere such as nitrogen gas.
中和は、水素イオン濃度がｐＨ６〜ｐＨ８、好ましくはｐＨ６．５〜ｐＨ７．５となるまで行われる。 Neutralization is performed until the hydrogen ion concentration reaches pH 6 to pH 8, preferably pH 6.5 to pH 7.5.
次いで、中和した後の廃水を加熱することにより、水溶性アルコールを留去する。加熱温度は、廃水に含まれる水溶性アルコールの種類や含有量により異なるが、通常は水溶性アルコールの沸点以上であり、水の沸点（約１００℃）以下である。
水溶性アルコールは、大気圧下に留去してもよいし、減圧下に留去してもよい。
Next, the water-soluble alcohol is distilled off by heating the neutralized waste water. The heating temperature varies depending on the type and content of the water-soluble alcohol contained in the wastewater, but is usually not less than the boiling point of the water-soluble alcohol and not more than the boiling point of water (about 100 ° C.).
The water-soluble alcohol may be distilled off under atmospheric pressure or may be distilled off under reduced pressure.
水溶性アルコールの留去は通常、中和で用いたと同様の内面がガラスで構成された容器中で行われ、中和する際に用いた容器中で引き続き加熱して水溶性アルコールを留去してもよい。 Distillation of the water-soluble alcohol is usually carried out in a container having the same inner surface made of glass as that used for neutralization, and the water-soluble alcohol is distilled off by subsequent heating in the container used for neutralization. May be.
なお、水溶性アルコールを留去することにより、水溶性アルコールと共に水分も少なからず同伴して留去され、これにより廃水の水素イオン濃度は僅かに上昇する。 In addition, by distilling off the water-soluble alcohol, the water-soluble alcohol is distilled off together with the water-soluble alcohol, whereby the hydrogen ion concentration of the waste water is slightly increased.
本発明の方法では、かくして水溶性アルコールを留去した後の廃水を活性汚泥処理に付す。活性汚泥処理に付される廃水は、既に水溶性アルコールが留去された後であるので、水溶性アルコールによる活性汚泥の活性低下が少なく、このため効率的に廃水を処理することができる。 In the method of the present invention, the waste water after the water-soluble alcohol is distilled off is subjected to activated sludge treatment. Since the waste water subjected to the activated sludge treatment is after the water-soluble alcohol has already been distilled off, the activated sludge is less likely to be activated by the water-soluble alcohol, and therefore the waste water can be treated efficiently.
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、かかる実施例によって限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by this Example.
〔実施例１〕
窒素ガスで満たした反応容器にキシレン５０質量部およびジメチルカーボネート〔ＣＨ3ＣＯＯＯＣＨ3〕９０質量部、およびナトリウムメトキシド〔ＣＨ3ＯＮａ〕６０質量部を仕込み、攪拌下、５０℃まで昇温したのち、２−メチルベンジルシアナイド
A reaction vessel filled with nitrogen gas was charged with 50 parts by mass of xylene, 90 parts by mass of dimethyl carbonate [CH 3 COOOCH 3 ], and 60 parts by mass of sodium methoxide [CH 3 ONa], and the temperature was raised to 50 ° C. with stirring. 2-methylbenzyl cyanide
反応後、この反応混合物を２０℃まで冷却し、撹拌下１５％塩酸３００質量部に滴下して加えて、メチルα−シアノ−２−メチルベンゾエート
その後、同温度を維持したまま純水２０質量部を加え、０．５時間保持することにより水洗し、洗液を回収した。 Thereafter, 20 parts by mass of pure water was added while maintaining the same temperature, and the mixture was held for 0.5 hours for washing with water, and the washing solution was collected.
上記で回収した洗液には、洗液１００質量部中、メタノールが１０質量部含まれていた。また、この洗液の水素イオン濃度はｐＨ０．６であった。 The washing liquid recovered above contained 10 parts by mass of methanol in 100 parts by mass of the washing liquid. The hydrogen ion concentration of this washing solution was pH 0.6.
この洗液１００質量部をガラス製容器に入れ、水酸化ナトリウム水溶液〔濃度２７質量％〕２．８質量部を加えて水素イオン濃度ｐＨ７とした。次いで、加熱してメタノールを留去した。留去後の洗液の水素イオン濃度はｐＨ４．３であり、そのメタノール濃度は、洗液１００質量部中０．６質量部であった。この廃水は、ステンレス鋼を浸食することがない。また、この洗液を活性汚泥処理に付しても、活性汚泥の活性を低下させることなく、処理することができる。 100 parts by mass of this washing solution was placed in a glass container, and 2.8 parts by mass of an aqueous sodium hydroxide solution (concentration 27% by mass) was added to obtain a hydrogen ion concentration of pH 7. Subsequently, it heated and distilled methanol off. The hydrogen ion concentration of the washing liquid after distillation was pH 4.3, and the methanol concentration was 0.6 parts by mass in 100 parts by mass of the washing liquid. This wastewater does not erode stainless steel. Moreover, even if this washing | cleaning liquid is attached | subjected to activated sludge process, it can process, without reducing the activity of activated sludge.
〔比較例１〕
合わせた洗液１００質量部に加える水酸化ナトリウム水溶液の量を３．０質量部とした以外は実施例１と同様に操作して水素イオン濃度をｐＨ１０とした以外は実施例１と同様に操作したところ、メタノールを留去した後の洗液は、洗液１００質量部中にメタノール１．０質量部を含むものであったが、水素イオン濃度はｐＨ９．１であった。この洗液は、ガラス容器の内面を侵食する可能性がある。
[Comparative Example 1]
The same operation as in Example 1 was carried out except that the amount of sodium hydroxide aqueous solution added to 100 parts by mass of the combined washings was changed to 3.0 parts by mass, and the hydrogen ion concentration was adjusted to pH 10 by operating in the same manner as in Example 1. As a result, the washing liquid after the methanol was distilled off contained 1.0 part by mass of methanol in 100 parts by mass of the washing liquid, but the hydrogen ion concentration was pH 9.1. This washing solution may erode the inner surface of the glass container.
〔比較例２〕
合わせた洗液をそのまま活性汚泥処理に付すと、活性汚泥の活性が大きく低下して、廃水処理を効率的に行うことができない。
[Comparative Example 2]
If the combined washings are directly subjected to activated sludge treatment, the activity of the activated sludge is greatly reduced and wastewater treatment cannot be performed efficiently.
本発明の廃水処理方法は、水溶性アルコールを含み、強酸性を示す廃水を処理することができるので、例えばジメチルカーボネートおよびメチルベンジルシアナイドをキシレン中で反応させて得られるメチルα−シアノ−２−メチルベンゾエートを水洗した後の洗液を廃水として処理することができる。 Since the wastewater treatment method of the present invention can treat wastewater that contains a water-soluble alcohol and exhibits strong acidity, for example, methyl α-cyano-2 obtained by reacting dimethyl carbonate and methylbenzyl cyanide in xylene. -The washing solution after washing the methylbenzoate with water can be treated as waste water.
Claims (1)
次いで加熱することにより前記水溶性アルコールを留去した後に、
活性汚泥処理に付すことを特徴とする前記廃水の廃水処理方法。 The wastewater containing water-soluble alcohol and showing strong acidity is neutralized with alkali in a container whose inner surface is made of glass to adjust the hydrogen ion concentration to pH 6 to pH 8,
Next, after distilling off the water-soluble alcohol by heating,
A wastewater treatment method for wastewater, which is subjected to activated sludge treatment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009030853A JP5347547B2 (en) | 2009-02-13 | 2009-02-13 | Wastewater treatment method |
| CN201010113798A CN101805091A (en) | 2009-02-13 | 2010-02-08 | Method of wastewater treatment |
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| JP2009030853A JP5347547B2 (en) | 2009-02-13 | 2009-02-13 | Wastewater treatment method |
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| JP2010184211A true JP2010184211A (en) | 2010-08-26 |
| JP5347547B2 JP5347547B2 (en) | 2013-11-20 |
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| JP2009030853A Expired - Fee Related JP5347547B2 (en) | 2009-02-13 | 2009-02-13 | Wastewater treatment method |
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| JP (1) | JP5347547B2 (en) |
| CN (1) | CN101805091A (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5946183A (en) * | 1982-09-08 | 1984-03-15 | Sanko Seisakusho:Kk | Treatment of waste water containing phenols, methanol and formaldehyde |
| JPS59120297A (en) * | 1982-12-20 | 1984-07-11 | フォルシュングスツエントルム ユーリッヒ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for continuous anaerobic decomposition of organic compound |
| JPS60222186A (en) * | 1984-04-20 | 1985-11-06 | Kurita Water Ind Ltd | Treatment of alcohol-containing water |
| JPS60238196A (en) * | 1984-05-10 | 1985-11-27 | Niigata Eng Co Ltd | Method and apparatus for biological treatment of organic waste water |
| JPS63265845A (en) * | 1987-04-21 | 1988-11-02 | Technol Obu Saafuesu:Kk | Method for protecting glass lining |
| JPH0623384A (en) * | 1991-06-27 | 1994-02-01 | Hitachi Plant Eng & Constr Co Ltd | Method and apparatus for treating waste water |
| JPH0655193A (en) * | 1991-07-22 | 1994-03-01 | Hitachi Plant Eng & Constr Co Ltd | Method for treating waste water-containing highly concentrated alcohol and device therefor |
| JPH078992A (en) * | 1993-06-24 | 1995-01-13 | Chikyu Kankyo Sangyo Gijutsu Kenkyu Kiko | Method for biological treatment of methanol-containing liquid |
| JPH0748144A (en) * | 1993-08-03 | 1995-02-21 | Shinko Pantec Co Ltd | Method for local mending of glass-lined apparatus and mending apparatus |
| JPH09239394A (en) * | 1996-03-11 | 1997-09-16 | Kurita Water Ind Ltd | Biological treatment of organic solvent |
| JPH10235386A (en) * | 1997-02-25 | 1998-09-08 | Mitsubishi Chem Corp | Temperature control device for aeration tank |
| JP2000218283A (en) * | 1999-01-28 | 2000-08-08 | Nec Environment Eng Ltd | Treatment of acidic organic waste water and treating device |
| JP2000233105A (en) * | 1999-02-15 | 2000-08-29 | Michio Watanabe | Multistep type filtration apparatus |
| JP2001259665A (en) * | 2000-03-23 | 2001-09-25 | Mitsubishi Gas Chem Co Inc | Hydrosulfite production waste liquid treating method |
| JP2003053366A (en) * | 2001-08-09 | 2003-02-25 | Kanebo Ltd | Activated sludge method |
| JP2005334867A (en) * | 2004-04-28 | 2005-12-08 | Sumitomo Chemical Co Ltd | Treatment method for organic matter-containing wastewater |
| JP2006028132A (en) * | 2004-07-21 | 2006-02-02 | Sanshin Chem Ind Co Ltd | Preparation method of sulfonium compound |
| JP2007209889A (en) * | 2006-02-09 | 2007-08-23 | Es Technology Kk | Surplus sludge treatment method |
-
2009
- 2009-02-13 JP JP2009030853A patent/JP5347547B2/en not_active Expired - Fee Related
-
2010
- 2010-02-08 CN CN201010113798A patent/CN101805091A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5946183A (en) * | 1982-09-08 | 1984-03-15 | Sanko Seisakusho:Kk | Treatment of waste water containing phenols, methanol and formaldehyde |
| JPS59120297A (en) * | 1982-12-20 | 1984-07-11 | フォルシュングスツエントルム ユーリッヒ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for continuous anaerobic decomposition of organic compound |
| JPS60222186A (en) * | 1984-04-20 | 1985-11-06 | Kurita Water Ind Ltd | Treatment of alcohol-containing water |
| JPS60238196A (en) * | 1984-05-10 | 1985-11-27 | Niigata Eng Co Ltd | Method and apparatus for biological treatment of organic waste water |
| JPS63265845A (en) * | 1987-04-21 | 1988-11-02 | Technol Obu Saafuesu:Kk | Method for protecting glass lining |
| JPH0623384A (en) * | 1991-06-27 | 1994-02-01 | Hitachi Plant Eng & Constr Co Ltd | Method and apparatus for treating waste water |
| JPH0655193A (en) * | 1991-07-22 | 1994-03-01 | Hitachi Plant Eng & Constr Co Ltd | Method for treating waste water-containing highly concentrated alcohol and device therefor |
| JPH078992A (en) * | 1993-06-24 | 1995-01-13 | Chikyu Kankyo Sangyo Gijutsu Kenkyu Kiko | Method for biological treatment of methanol-containing liquid |
| JPH0748144A (en) * | 1993-08-03 | 1995-02-21 | Shinko Pantec Co Ltd | Method for local mending of glass-lined apparatus and mending apparatus |
| JPH09239394A (en) * | 1996-03-11 | 1997-09-16 | Kurita Water Ind Ltd | Biological treatment of organic solvent |
| JPH10235386A (en) * | 1997-02-25 | 1998-09-08 | Mitsubishi Chem Corp | Temperature control device for aeration tank |
| JP2000218283A (en) * | 1999-01-28 | 2000-08-08 | Nec Environment Eng Ltd | Treatment of acidic organic waste water and treating device |
| JP2000233105A (en) * | 1999-02-15 | 2000-08-29 | Michio Watanabe | Multistep type filtration apparatus |
| JP2001259665A (en) * | 2000-03-23 | 2001-09-25 | Mitsubishi Gas Chem Co Inc | Hydrosulfite production waste liquid treating method |
| JP2003053366A (en) * | 2001-08-09 | 2003-02-25 | Kanebo Ltd | Activated sludge method |
| JP2005334867A (en) * | 2004-04-28 | 2005-12-08 | Sumitomo Chemical Co Ltd | Treatment method for organic matter-containing wastewater |
| JP2006028132A (en) * | 2004-07-21 | 2006-02-02 | Sanshin Chem Ind Co Ltd | Preparation method of sulfonium compound |
| JP2007209889A (en) * | 2006-02-09 | 2007-08-23 | Es Technology Kk | Surplus sludge treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5347547B2 (en) | 2013-11-20 |
| CN101805091A (en) | 2010-08-18 |
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