JPH06121991A - Method of treating dyeing waste water - Google Patents
Method of treating dyeing waste waterInfo
- Publication number
- JPH06121991A JPH06121991A JP29810092A JP29810092A JPH06121991A JP H06121991 A JPH06121991 A JP H06121991A JP 29810092 A JP29810092 A JP 29810092A JP 29810092 A JP29810092 A JP 29810092A JP H06121991 A JPH06121991 A JP H06121991A
- Authority
- JP
- Japan
- Prior art keywords
- dyeing
- waste water
- cod
- wastewater
- dyeing waste
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (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、染色排水の処理方法に
関する。FIELD OF THE INVENTION The present invention relates to a method for treating dyeing wastewater.
【０００２】[0002]
(1) 発明の背景 染色の過程では、染色工場から油剤などの布帛仕上剤、
染料、糊剤、染色助剤等を含む多量の排水が放出され
る。この排水は、多くの場合著しく着色した濁った液体
で、かなりの被酸化性有機物を含み、ＣＯＤとして300p
pm以上、ＢＯＤとして400ppm以上に達し、これをそのま
ま河川や海に放流することはできない（公共用水域への
許容上限値：ＢＯＤ及びＣＯＤ≦120ppm（日平均））か
ら、下水施設のない地域、又は施設はあっても排水量が
多いときは公共下水施設を利用することも困難である。(1) Background of the Invention In the process of dyeing, a fabric finishing agent such as an oil agent from a dyeing factory,
A large amount of wastewater containing dyes, sizing agents, dyeing assistants, etc. is discharged. This effluent is often a highly colored, cloudy liquid that contains significant oxidizable organics and has a COD of 300 p
pm or more, BOD reaches 400ppm or more, and it cannot be discharged as it is to rivers or the sea (allowable upper limit to public water areas: BOD and COD ≤ 120ppm (daily average)). Or, even if there are facilities, it is difficult to use public sewage facilities when the amount of drainage is large.
【０００３】そこで、普通は油脂類を加圧浮上させ、有
機凝集剤を添加して微細な浮遊物を凝集させた後、スト
レーナを通して濾過後、更に次亜塩素酸ナトリウムを用
いて脱色放流する方法が普通に行われるが、有機系凝集
剤の使用は当然ＢＯＤやＣＯＤを増加させるので、その
使用量に制限を受ける。特に、近年は益々染色の堅牢化
が求められ、物理・化学的に安定した染料乃至染色法が
使用されることは、逆に染色排水の処理をより困難とし
ている。Therefore, usually, oils and fats are floated under pressure, an organic flocculant is added to flocculate a fine suspended matter, the mixture is filtered through a strainer, and then decolorized and discharged using sodium hypochlorite. However, since the use of the organic coagulant naturally increases BOD and COD, the amount used is limited. In particular, in recent years, it has been increasingly required to make dyeing fast, and the use of a physically or chemically stable dye or dyeing method makes treatment of dyeing wastewater more difficult.
【０００４】[0004]
【発明が解決しようとする課題】以上の実情に鑑み、本
発明は、活性汚泥法など大規模な装置を利用することな
しに、染色排水を河川へ放流可能な程度に浄化する方法
を提供することを目的とする。In view of the above situation, the present invention provides a method for purifying dyeing wastewater to the extent that it can be discharged into a river, without using a large-scale apparatus such as an activated sludge method. The purpose is to
【０００５】[0005]
(1) 概要 以上の課題を解決するため、本発明は、染色排水を過硫
酸塩で処理することを特徴とする染色排水の処理法を要
旨とする。以下、発明を構成する諸要素等につき項分け
して説明する。(1) Outline In order to solve the above problems, the gist of the present invention is a method for treating dyeing wastewater, which comprises treating the dyeing wastewater with a persulfate. Hereinafter, various elements constituting the invention will be described by dividing them into items.
【０００６】(2) 染色排水 染色に使用される染料には、酸性染料、塩基性染料、直
接染料、分散染料、反応染料、硫化染料、ナフトール染
料、建染染料などの種類があるが、何れにしても染色後
の糸条等は、染着しなかった少量の染料分子若しくは微
粒子、ナフトール類（ナフトール染料の場合）、カプラ
ー、糊剤、油剤、染色助剤、還元剤（バッダイの場合）
などが入り混じった中等度のＢＯＤを持つ有色の液で、
著しく溷濁しているのが普通である。(2) Dyeing and drainage Dyes used for dyeing include acid dyes, basic dyes, direct dyes, disperse dyes, reactive dyes, sulfur dyes, naphthol dyes and vat dyes. However, after dyeing, the yarns, etc., are small amounts of dye molecules or fine particles that were not dyed, naphthols (for naphthol dyes), couplers, sizing agents, oil agents, dyeing aids, reducing agents (for badai).
It is a colored liquid with a moderate BOD mixed with the like,
It is usually very cloudy.
【０００７】(3) 過硫酸塩 本発明において酸化剤として使用される過硫酸塩は、一
般式M2S2O8（式中Ｍはアルカリ金属又はアンモニウム
基）或は一般式M'S2O8（式中M'はアリカリ土類金属）で
示される過酸化物で、例えばＭがナトリウムであるペル
オクソ二硫酸ナトリウムは、陽極に少量のシアン酸塩又
はチオシアン酸塩を添加した硫酸ナトリウムを電解酸化
することにより得られる。過硫酸塩類は一般に単体とし
ては不安定であるので、水溶液の形態で使用される。適
当な濃度は、10〜500mg/Ｌ、好ましくは50〜200 mg／Ｌ
である。反応は中性で行われるのが好ましく、このため
被処理液のpHを適宜調整する必要がある。(3) Persulfate The persulfate used as an oxidizing agent in the present invention has a general formula M 2 S 2 O 8 (wherein M is an alkali metal or ammonium group) or a general formula M'S 2 O 8 (M 'in the formula is an alkaline earth metal), for example, sodium peroxodisulfate in which M is sodium is the electrolytic oxidation of sodium sulfate obtained by adding a small amount of cyanate or thiocyanate to the anode. It is obtained by doing. Since persulfates are generally unstable as a simple substance, they are used in the form of an aqueous solution. A suitable concentration is 10 to 500 mg / L, preferably 50 to 200 mg / L
Is. The reaction is preferably carried out neutrally, and therefore it is necessary to appropriately adjust the pH of the liquid to be treated.
【０００８】(4) 複合処理 本発明の処理対象である染色排水は、必要に応じ他の酸
化剤その他の処理剤で複合処理されるのが望ましい。脱
色効果をより徹底化するため、次亜塩素酸塩類による後
処理は一般的に有効である。また被処理液が懸濁物を含
むときは、本処理に先立ち、遠心分離又は凝集剤による
凝集処理等の処置を施すのがよい。更に排水が油分を含
む場合は、加圧浮上法の併用が好ましい。凝集剤として
は、例えば、ミョウバン（硫酸バン土）、第二塩化鉄、
シリカゾル、石灰等の無機系凝集剤及びポリ（塩化２−
ヒドロキシプロピレン−１−Ｎ，Ｎ−ジメチルアンモニ
ウム）、ポリアクリル酸ナトリウム、ポリアクリル酸ア
ミド、ポリ［Ｎ−（ジメチルアミノプロピル）アクリル
アミド、グアーガムなどの合成又は天然高分子化合物な
どが使用される。(4) Combined treatment It is desirable that the dyeing wastewater to be treated in the present invention is subjected to a combined treatment with other oxidizing agents and other treating agents as needed. In order to make the decolorizing effect more thorough, post-treatment with hypochlorites is generally effective. Further, when the liquid to be treated contains a suspension, it is preferable to perform a treatment such as centrifugation or an aggregating treatment with an aggregating agent prior to the main treatment. Furthermore, when the waste water contains oil, it is preferable to use the pressure floating method together. As the coagulant, for example, alum (van sulfate earth), ferric chloride,
Inorganic flocculants such as silica sol and lime, and poly (chlorinated 2-
Synthetic or natural polymer compounds such as hydroxypropylene-1-N, N-dimethylammonium), sodium polyacrylate, polyacrylic acid amide, poly [N- (dimethylaminopropyl) acrylamide, and guar gum are used.
【０００９】[0009]
【作用】過硫酸塩類は、脱色性能においては次亜塩素酸
塩類に劣るものの、染色工場排水中の雑多な有機物の分
解に多大の効果を奏し、排水のＣＯＤを1/2 又はそれ以
下に低下させる。従って、これを次亜塩素酸塩類と併用
することにより、脱色がより完全となるから、前記排水
の処理に一層顕著な作用効果を発揮する。[Action] persulfates, although inferior to hypochlorite salts in bleaching performance, exerts great effect on the degradation of miscellaneous organic substances in the dyeing plant wastewater, reducing the COD of the waste water to 1/2 or less Let Therefore, by using this together with the hypochlorites, decolorization becomes more complete, so that the treatment effect of the wastewater is more remarkable.
【００１０】[0010]
【実施例】以下、実施例により発明実施の態様を説明す
るが、例示は単に説明用のもので、発明思想の制限又は
限定を意味するものではない。The present invention will now be described in more detail by way of examples, but the examples are merely for the purpose of illustration and are not meant to limit or limit the inventive idea.
【００１１】試験例１ 下記性状の染色工場排水（サンプルと）を攪拌機付
容器内に採り、浄化試験を行った。Test Example 1 Wastewater (with a sample) of a dyeing factory having the following properties was placed in a container equipped with a stirrer and a purification test was conducted.
【００１２】(イ) サンプル 種別：一般排水 pH：7.7 ＣＯＤ：88mg／Ｌ ＢＯＤ：80mg／Ｌ 着色度：１３０ 色調：薄青色，多少透明(A) Sample type: general wastewater pH: 7.7 COD: 88 mg / L BOD: 80 mg / L Coloring degree: 130 Color tone: light blue, slightly transparent
【００１３】(ロ) サンプル 種別：一般排水 pH：9.0 ＣＯＤ：146mg ／Ｌ ＢＯＤ：30mg／Ｌ 着色度：１５０ 色調：青色，不透明(B) Sample type: general wastewater pH: 9.0 COD: 146 mg / L BOD: 30 mg / L Coloring degree: 150 Color tone: blue, opaque
【００１４】(ハ) 脱色試験 サンプルとの排水を１：１．５の割合で混合し（混
合物の理論ＣＯＤ＝122.8mg ／Ｌ）、塩酸でpH７の調整
後、過硫酸ナトリウムを100mg/Ｌの割合で添加し、15分
間攪拌した。次いで、次亜塩素酸ナトリウムを100mg/Ｌ
の割合で添加し、更に15分間攪拌を継続した。被処理液
は無色透明で、そのＣＯＤは60mg／Ｌであった。(C) Decolorization test The waste water with the sample was mixed at a ratio of 1: 1.5 (theoretical COD of the mixture = 122.8 mg / L), and after adjusting the pH to 7 with hydrochloric acid, sodium persulfate was adjusted to 100 mg / L. It was added in proportion and stirred for 15 minutes. Next, sodium hypochlorite 100mg / L
And the stirring was continued for another 15 minutes. The liquid to be treated was colorless and transparent, and its COD was 60 mg / L.
【００１５】試験例２ 下記性状の染色工場排水（サンプルと）を攪拌機付
容器内に採り、浄化試験を行った。Test Example 2 Dyeing plant wastewater (with sample) having the following properties was put in a container equipped with a stirrer and a purification test was conducted.
【００１６】(イ) サンプル 種別：水洗排水 pH：10.3 ＣＯＤ：663mg ／Ｌ ＢＯＤ：400mmg／Ｌ 着色度：１１，２００ 色調：濃紫色、不透明(A) Sample type: Washing drainage pH: 10.3 COD: 663 mg / L BOD: 400 mmg / L Coloring degree: 11,200 Color tone: dark purple, opaque
【００１７】(ロ) サンプル 種別：調整槽排水 pH：12.2 ＣＯＤ：323mg ／Ｌ ＢＯＤ：400g／Ｌ 着色度：９００(B) Sample type: Wastewater from adjusting tank pH: 12.2 COD: 323 mg / L BOD: 400 g / L Coloring degree: 900
【００１８】(ハ) 脱色試験 サンプルとの排水を１：６の割合で混合し（混合物
の理論ＣＯＤ＝286.3)塩酸でpH７に調整後、ポリアクリ
ル酸ナトリウムを100mg ／Ｌの割りで加え、暫時攪拌
後、放置して凝集物を浮上させ、濾別した。濾液のＣＯ
Ｄは600 mg/Lであった。(C) Decolorization test The waste water with the sample was mixed at a ratio of 1: 6 (theoretical COD of the mixture = 286.3), the pH was adjusted to 7 with hydrochloric acid, and sodium polyacrylate was added at a rate of 100 mg / L for a while. After stirring, the mixture was allowed to stand, the aggregate was floated, and filtered. CO of filtrate
D was 600 mg / L.
【００１９】濾液に過硫酸ナトリウムを150mg/Ｌの割合
で添加し、15分間攪拌した。次いで、次亜塩素酸ナトリ
ウムを500mg/Ｌの割合で添加し、更に15分間攪拌を継続
した。被処理液は無色透明で、そのＣＯＤは250mg ／Ｌ
であった。Sodium persulfate was added to the filtrate at a rate of 150 mg / L and stirred for 15 minutes. Then, sodium hypochlorite was added at a rate of 500 mg / L, and stirring was continued for another 15 minutes. The liquid to be treated is colorless and transparent, and its COD is 250 mg / L.
Met.
【００２０】実施例１ 空気攪拌式調質槽（容量 100m3）、空気攪拌式脱色槽
（容量 100m3）及び放流確認槽（容量50m3）を直列し、
ＣＯＤ198mg/L 、pH8.5 の染色工場排水（前記サンプル
と及び別の加圧浮上槽からの排水の混液）を250m3/
時の割合で酸化槽内へ流し込み、塩酸でpH７に調整しな
がら過硫酸ナトリウムを100mg ／Ｌの割合で添加し、次
の脱色槽内で次亜塩素酸ナトリウムを500mg の割りで添
加し、連続的に放流確認槽内へ移送すると共に、最後の
槽からの排水中190m3 を工場外へ放流し、90m3を工場用
水として再利用した。この条件で14時間運転したときの
処理排水の性状は下記の通りであった。Example 1 An air stirring type tempering tank (capacity 100 m 3 ), an air stirring type decoloring tank (capacity 100 m 3 ) and a discharge confirmation tank (capacity 50 m 3 ) were connected in series,
COD 198 mg / L, pH 8.5 wastewater from a dyeing plant (mixture of the wastewater from the above sample and another pressurized flotation tank) 250 m 3 /
Pour into the oxidation tank at the time ratio, add sodium persulfate at a ratio of 100 mg / L while adjusting the pH to 7 with hydrochloric acid, and add sodium hypochlorite at a rate of 500 mg in the next decolorization tank, and continuously thereby transferred to discharge check tank in manner, and discharged wastewater in 190 m 3 from the last tank outside the factory, was reused 90m 3 as plant water. The properties of the treated wastewater after operating for 14 hours under these conditions were as follows.
【００２１】pH：６〜８ 沈澱物：50mg／Ｌ ＣＯＤ：10mg／Ｌ以下 残留塩素：２mg／Ｌ以下 Ｎ−Ｈ：２mg／Ｌ以下PH: 6 to 8 Precipitate: 50 mg / L COD: 10 mg / L or less Residual chlorine: 2 mg / L or less NH: 2 mg / L or less
【００２２】[0022]
【発明の効果】以上説明した通り、本発明は、染色工場
排水を経済的に処理する方法を提供し得たことにより、
関連産業の発展及び公共の福祉に貢献しうる。INDUSTRIAL APPLICABILITY As described above, the present invention has been able to provide a method for economically treating wastewater from a dyeing plant.
It can contribute to the development of related industries and public welfare.
Claims (2)
とする染色排水の処理法。1. A method for treating dyeing wastewater, which comprises treating the dyeing wastewater with a persulfate.
る請求項１の処理法。2. The treatment method according to claim 1, wherein the dyeing wastewater is treated with persulfate and perchlorate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29810092A JPH06121991A (en) | 1992-10-09 | 1992-10-09 | Method of treating dyeing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29810092A JPH06121991A (en) | 1992-10-09 | 1992-10-09 | Method of treating dyeing waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06121991A true JPH06121991A (en) | 1994-05-06 |
Family
ID=17855160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29810092A Pending JPH06121991A (en) | 1992-10-09 | 1992-10-09 | Method of treating dyeing waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06121991A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7560033B2 (en) | 2004-10-13 | 2009-07-14 | E.I. Dupont De Nemours And Company | Multi-functional oxidizing composition |
| JP2021023869A (en) * | 2019-08-02 | 2021-02-22 | 野村マイクロ・サイエンス株式会社 | Decomposition method for persistent substance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506164A (en) * | 1973-05-19 | 1975-01-22 | ||
| JPS5139959A (en) * | 1974-09-30 | 1976-04-03 | Sumitomo Chemical Co | HOKOZOKUNITOROKAGOBUTSU NO SEISEIHAIE KISHORIHOHO |
| JPS58223482A (en) * | 1982-06-22 | 1983-12-26 | Mitsubishi Electric Corp | Treatment of waste water using persulfuric acid and or its salt |
-
1992
- 1992-10-09 JP JP29810092A patent/JPH06121991A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506164A (en) * | 1973-05-19 | 1975-01-22 | ||
| JPS5139959A (en) * | 1974-09-30 | 1976-04-03 | Sumitomo Chemical Co | HOKOZOKUNITOROKAGOBUTSU NO SEISEIHAIE KISHORIHOHO |
| JPS58223482A (en) * | 1982-06-22 | 1983-12-26 | Mitsubishi Electric Corp | Treatment of waste water using persulfuric acid and or its salt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7560033B2 (en) | 2004-10-13 | 2009-07-14 | E.I. Dupont De Nemours And Company | Multi-functional oxidizing composition |
| JP2021023869A (en) * | 2019-08-02 | 2021-02-22 | 野村マイクロ・サイエンス株式会社 | Decomposition method for persistent substance |
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