JPH057077B2 - - Google Patents
Info
- Publication number
- JPH057077B2 JPH057077B2 JP2127721A JP12772190A JPH057077B2 JP H057077 B2 JPH057077 B2 JP H057077B2 JP 2127721 A JP2127721 A JP 2127721A JP 12772190 A JP12772190 A JP 12772190A JP H057077 B2 JPH057077 B2 JP H057077B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- separated
- pva
- polyvinyl alcohol
- 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.)
- Expired - Lifetime
Links
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 42
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000002351 wastewater Substances 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 230000003472 neutralizing effect Effects 0.000 claims description 7
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- 238000005406 washing Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000009990 desizing Methods 0.000 description 6
- 238000009991 scouring Methods 0.000 description 6
- 238000004061 bleaching Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000006386 neutralization reaction Methods 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004043 dyeing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005292 vacuum distillation Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Removal Of Specific Substances (AREA)
- Carbon And Carbon Compounds (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は繊維布帛の例えば前処理工程で発生す
るポリビニールアルコールを含有する糊抜精練漂
白廃水を無害化して廃水公害を未然に防止するた
めの廃水処理方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is intended to prevent wastewater pollution by rendering harmless desizing and scouring bleaching wastewater containing polyvinyl alcohol generated in the pretreatment process of textile fabrics, for example. The present invention relates to a wastewater treatment method.
［従来の技術］
繊維産業では、例えば製織時においては糸切れ
防止のための糊付け剤としてポリビニールアルコ
ール（以下これをPVAを称す）が広く使用され
ている。このPVAは、布帛の特に糊抜、精練加
工時（前処理工程）の洗浄浴中に溶脱し、廃水の
COD負荷となる。さらにこのPVAはバクテリヤ
による分解は困難であるため、未分解で海洋、河
川に流すと水中の溶存酸素が不足し、生体系のバ
ランスが崩れて水中生物が死滅し、死の海洋、河
川となるのでPVAを含む廃水の排出にはきびし
い規制がある。[Prior Art] In the textile industry, polyvinyl alcohol (hereinafter referred to as PVA) is widely used as a sizing agent to prevent yarn breakage during weaving, for example. This PVA is leached into the washing bath especially during the desizing and scouring process (pre-treatment process) of the fabric, and is released into the wastewater.
It becomes a COD load. Furthermore, since this PVA is difficult to be broken down by bacteria, if it is released into the ocean or rivers undegraded, there will be a lack of dissolved oxygen in the water, the balance of the biological system will be disrupted, and aquatic life will die, resulting in dead oceans and rivers. Therefore, there are strict regulations regarding the discharge of wastewater containing PVA.
［発明が解決しようとする課題］
そこで業界では、廃水規制の対策として、従来
では硼素キレート凝集分離あるいは高分子有機物
及び無機物の添加による巻込み凝集分離等による
分離回収法が採られているが、これらの分離回収
法ではスラツヂの発生多く、且つ、PVAの除去
効率が低く、さらにCOD規制面でも満足が得ら
れるものでない。すなわち、従来の硼素キレート
凝集分離法においては約90％の除去効率があるも
のの分離物の含水分が90％もありその量が多く廃
棄処分に問題を残し放置によりPHが変化してキレ
ートが外れて糊に戻り非常に始末の悪いものとな
つている。又高分子有機凝集剤、無機凝集剤の巻
込み分離法では、除去率が50％程度で多量のスラ
ツヂが出るので、この廃棄処分にも問題を残すも
のである。[Problems to be Solved by the Invention] Therefore, in the industry, as a measure to comply with wastewater regulations, conventional methods of separation and recovery have been adopted, such as boron chelate coagulation separation or entrainment coagulation separation by adding polymeric organic and inorganic substances. These separation and recovery methods generate a lot of sludge, have low PVA removal efficiency, and are not satisfactory in terms of COD regulations. In other words, although the conventional boron chelate coagulation separation method has a removal efficiency of about 90%, the water content of the separated product is 90%, which poses a problem in disposal, and when left untreated, the pH changes and the chelate comes off. It has turned back to glue and has become very disorganized. Furthermore, in the separation method involving polymeric organic flocculants and inorganic flocculants, the removal rate is about 50% and a large amount of sludge is produced, which poses a problem in the disposal of this sludge.
［課題を解決するための手段］
本発明は、従来の問題点に着目してなされたも
ので、PVAの除去率を100％近くにまで向上せし
めると共に、スラツヂ発生を最少限に抑えさらに
その分離PVAは燃料として利用し、また分離水
は再利用することができるようにして資源の節約
を可能とすることができる廃水処理法の開発にあ
る。[Means for Solving the Problems] The present invention has been made by focusing on the conventional problems, and improves the removal rate of PVA to nearly 100%, minimizes the generation of sludge, and further improves its separation. PVA can be used as fuel, and separated water can be reused, leading to the development of wastewater treatment methods that can save resources.
さらに本発明を具体的に述べると、布帛の糊抜
き処理工程の洗浄浴から排出されるPVA含有の
廃水にペルオキソ硫酸塩を加え、さらにこれを加
熱することによりPVAを固液分離し、次いでこ
の分離したPVAは乾燥炭化することにより脱色、
脱油等の材として使用することができるように
し、さらに、分離水は減圧蒸溜して再利用するこ
とができるようにして廃水公害を未然に防止する
と共に、資源の節約に役だたせることができる廃
水処理方法を提供することにある。 To describe the present invention more specifically, peroxosulfate is added to the PVA-containing wastewater discharged from the washing bath in the fabric desizing process, and the PVA is separated into solid and liquid by further heating. The separated PVA is decolorized by drying and carbonizing.
It can be used as a material for oil removal, etc., and the separated water can be distilled under reduced pressure and reused, preventing wastewater pollution and helping to save resources. The objective is to provide a wastewater treatment method that is possible.
［実施例］
以下に本発明を図面に示す実施例に基いて詳細
に説明する。[Examples] The present invention will be described in detail below based on examples shown in the drawings.
図面は長尺布帛を連続的に前処理する前処理工
程の説明図であつて、Ａはその糊抜き工程、Ｂは
精練工程、Ｃは漂白工程を示す。これら各工程は
周知であり、また本発明の要旨でないので、それ
ら工程の構造説明は省略する。 The drawings are explanatory diagrams of a pretreatment process in which a long fabric is continuously pretreated, and A shows the desizing process, B shows the scouring process, and C shows the bleaching process. Since each of these steps is well known and is not the gist of the present invention, a structural description of these steps will be omitted.
１は糊抜き工程の各洗浄槽２からの洗浄水を受
け入れる受槽であつて、この受槽１内に供給され
る洗浄水内に含まれるPVA濃度は不図示の濃度
センサーによりそのPVA濃度が約1.0〜1.2％とな
るように給水管３からの給水量を調整することに
よつて調整されている。従つてこの受槽１内には
PVA濃度が略一定（1.0〜1.2％）の廃水が受け入
れられる。４はペルオキソ硫酸塩の薬液槽であつ
て、このペルオキソ硫酸塩の適量が、上記受槽１
内へその受槽１内廃水量に比例して注入される。
またこの受槽１内にはヒータ５が配設されていて
受槽１内容液が約70〜100℃近くまで加熱される
ようになつている。 1 is a receiving tank that receives washing water from each washing tank 2 in the desizing process, and the PVA concentration contained in the washing water supplied to this receiving tank 1 is determined by a concentration sensor (not shown) to be approximately 1.0. It is adjusted by adjusting the amount of water supplied from the water supply pipe 3 so that it becomes ~1.2%. Therefore, in this receiving tank 1,
Wastewater with approximately constant PVA concentration (1.0-1.2%) is accepted. 4 is a chemical tank for peroxosulfate, and an appropriate amount of this peroxosulfate is transferred to the receiving tank 1.
The waste water is injected into the tank 1 in proportion to the amount of waste water in the tank 1.
Further, a heater 5 is disposed in the receiving tank 1, so that the liquid in the receiving tank 1 is heated to approximately 70 to 100°C.
従つてこの受槽１内に入れられた廃水は、ペル
オキソ硫酸塩と加熱作用によりPVAが分離され
る。このPVA分離水は中和槽６内に一時的に貯
え、この中和槽６内のPVA分離水に中和剤を添
加し、PVAの中和すなわち硫酸塩の発生を抑制
する。この中和剤としては、前記精練工程Ｂ及び
漂白工程から排出される弱アルカリ性の排液を利
用すると新たなアルカリ液の使用が省け、中和剤
の節約となる。この中和槽６内で中和された
PVA分離水は、分離装置７によりPVAと水分と
が分離される。そしてこの分離されたPVAの含
水率は約60〜70％にまで脱水されるので、次の乾
燥装置８により容易に乾燥させることができる。
乾燥されたPVAの一部は燃料として使用し、ま
たその他部は炭化することで、例えば染色排水の
脱色用又は脱油用の活性炭として使用することが
できる。使用ずみの活性炭は燃料として使用する
ことができる。前記分離装置７により分離された
分離液は、減圧蒸溜装置９により不純物と蒸溜水
とに分離され、その蒸溜水は、再利用されまた不
純物は燃料として使用することができる。 Therefore, the peroxosulfate and PVA are separated from the waste water placed in the receiving tank 1 by the heating action. This PVA separated water is temporarily stored in a neutralization tank 6, and a neutralizing agent is added to the PVA separated water in this neutralization tank 6 to neutralize PVA, that is, suppress the generation of sulfate. If the weakly alkaline waste liquid discharged from the scouring step B and the bleaching step is used as the neutralizing agent, the use of new alkaline solution can be omitted and the amount of neutralizing agent can be saved. Neutralized in this neutralization tank 6
The PVA separated water is separated into PVA and water by the separation device 7. Since the water content of this separated PVA is dehydrated to about 60 to 70%, it can be easily dried in the next drying device 8.
A part of the dried PVA can be used as fuel, and the other part can be carbonized and used as activated carbon for decolorizing dyeing wastewater or deoiling, for example. Spent activated carbon can be used as fuel. The separated liquid separated by the separation device 7 is separated into impurities and distilled water by the vacuum distillation device 9, and the distilled water can be reused and the impurities can be used as fuel.
このように本実施例にあつては、布帛の前処理
工程から排出されるPVA含有廃水に加熱とペル
オキソ硫酸塩を添加してPVAの分離水を得、こ
のPVA分離水を中和した上で固液分離を行なう
ものであるから、PVAと水分との完全分離が可
能となり、繊維加工業界における廃液公害を未然
に防止することができる。また分離されたPVA
は中和されていることから、このPVAを基にし
て良質の活性炭を生産することができ、例えば染
色洗浄排水の脱色、脱油処理のための活性炭とし
て再利用が可能となる。また上記PVAを中和せ
しめるための中和剤は、精練漂白工程から排出さ
れる弱アルカリ性の排液を利用することができる
ので、中和剤の節約が可能であつて、経済性に優
れるものがある。 In this example, PVA-containing wastewater discharged from the fabric pretreatment process was heated and peroxosulfate was added to obtain PVA-separated water, and this PVA-separated water was neutralized. Since it performs solid-liquid separation, it is possible to completely separate PVA from water, making it possible to prevent waste liquid pollution in the textile processing industry. Also separated PVA
Since PVA is neutralized, it is possible to produce high-quality activated carbon based on this PVA, and it can be reused, for example, as activated carbon for decolorizing and deoiling wastewater from dyeing and washing. In addition, as the neutralizing agent for neutralizing the PVA, the slightly alkaline waste liquid discharged from the scouring and bleaching process can be used, making it possible to save on the neutralizing agent and making it highly economical. There is.
［発明の効果］
以上のように本発明は、ポリビニールアルコー
ルを含有する廃水にペルオキソ硫酸塩を添加する
と共に該廃水を加熱してポリビニールアルコール
分離水となし、次いでこのポリビニールアルコー
ル分離水を中和した上でポリビニールアルコール
と水分とを分離し、該分離されたポリビニールア
ルコールは活性炭となし、また分離水は減圧蒸溜
して蒸溜水となす廃水の処理方法であるから、こ
れによれば、ポリビニールアルコールと水分との
完全分離が可能となり繊維加工業界における廃液
公害を未然に防止することができる。また分離さ
れたポリビニールアルコールは中和処理している
ことから、この中和ポリビニールアルコールを基
にして良質の活性炭を生産することができ、例え
ば染色洗浄排水の脱色脱油処理のための活性炭と
して再利用することができる等、経済性と有利性
に優れた廃水処理が可能となるといつた効果が得
られる。[Effects of the Invention] As described above, the present invention adds peroxosulfate to wastewater containing polyvinyl alcohol, heats the wastewater to obtain separated polyvinyl alcohol water, and then converts this separated water into polyvinyl alcohol separated water. This is a wastewater treatment method in which polyvinyl alcohol and water are separated after neutralization, the separated polyvinyl alcohol is used as activated carbon, and the separated water is distilled under reduced pressure to make distilled water. For example, polyvinyl alcohol and water can be completely separated, making it possible to prevent waste liquid pollution in the textile processing industry. In addition, since the separated polyvinyl alcohol has been neutralized, high-quality activated carbon can be produced based on this neutralized polyvinyl alcohol. For example, activated carbon can be used to decolorize and deoil dyeing and cleaning wastewater. The benefits include being able to treat wastewater in an economical and advantageous manner, such as by being able to reuse it as wastewater.
図面は本発明である廃水処理方法の説明図であ
る。
Ａ……糊抜き工程、Ｂ……精練工程、Ｃ……漂
白工程、１……受槽、２……洗浄槽、３……給水
管、４……薬液槽、５……ヒータ、６……中和
槽、７……固液分離装置、８……乾燥装置、９…
…減圧蒸溜装置。
The drawing is an explanatory diagram of the wastewater treatment method of the present invention. A... Desizing process, B... Scouring process, C... Bleaching process, 1... Receiving tank, 2... Washing tank, 3... Water supply pipe, 4... Chemical tank, 5... Heater, 6... Neutralization tank, 7... solid-liquid separation device, 8... drying device, 9...
...Vacuum distillation equipment.
Claims (1)
ルオキソ硫酸塩を添加すると共に該廃水を加熱し
てポリビニールアルコール分離水となし、次いで
このポリビニールアルコール分離水を中和した上
でポリビニールアルコールと水分とを分離し、該
分離されたポリビニールアルコールは活性炭とな
し、また分離水は減圧蒸溜して蒸溜水となすこと
を特徴とする廃水の処理方法。1 Adding peroxosulfate to wastewater containing polyvinyl alcohol and heating the wastewater to produce polyvinyl alcohol separated water, then neutralizing this polyvinyl alcohol separated water and then separating polyvinyl alcohol and water. A method for treating wastewater, which comprises separating polyvinyl alcohol, converting the separated polyvinyl alcohol into activated carbon, and distilling the separated water under reduced pressure to obtain distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2127721A JPH0422493A (en) | 1990-05-17 | 1990-05-17 | Treatment of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2127721A JPH0422493A (en) | 1990-05-17 | 1990-05-17 | Treatment of waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0422493A JPH0422493A (en) | 1992-01-27 |
| JPH057077B2 true JPH057077B2 (en) | 1993-01-28 |
Family
ID=14967069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2127721A Granted JPH0422493A (en) | 1990-05-17 | 1990-05-17 | Treatment of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0422493A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111285370A (en) * | 2020-02-20 | 2020-06-16 | 南京工业大学 | Comprehensive utilization method of organic hazardous waste salt residues |
-
1990
- 1990-05-17 JP JP2127721A patent/JPH0422493A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0422493A (en) | 1992-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5787537A (en) | Method of washing laundry and recycling wash water | |
| Grau | Textile industry wastewaters treatment | |
| CN107068226B (en) | Disposal and decontamination of radioactive polyvinyl alcohol products | |
| Mazumder | Process evaluation and treatability study of wastewater in a textile dyeing industry. | |
| CN109095709A (en) | A kind of advanced oxidization method of pair of dyeing waste-water decolorizing | |
| CN104649335B (en) | Ferrous chloride crystal and the method and device of hydrochloric acid is reclaimed from hydrochloric acid pickling waste liquor | |
| WO2008089529A1 (en) | Process and apparatus for reuse of liquid effluents generated in the textile finishing, laundering, dyeing and stamping process | |
| JPH057077B2 (en) | ||
| CN106241833B (en) | A kind of method of the recycling of light alkali wasteliquid regeneration high alkali liquid | |
| MXPA05003269A (en) | Membrane bioreactor waste water treatment method. | |
| CN205347076U (en) | Contain salt sewage treatment system | |
| CN106430792A (en) | Yarn-dyed fabric yarn dyeing waste water treatment and online recycling method and device | |
| Groff | Textile waste | |
| Mani et al. | Zero liquid discharge scheme in a common effluent treatment plant for textile industries in Tamilnadu, India | |
| CN209039270U (en) | Processing system suitable for dyeing and printing sewage | |
| CN115403207B (en) | Method and system for treating high-salinity high-organic-matter wastewater | |
| Patil et al. | Wastewater reuse and recycling in the textile industry | |
| JPH0630771B2 (en) | How to separate polyvinyl alcohol | |
| JPH0142939B2 (en) | ||
| JPH04281892A (en) | Treatment of desizing waste water | |
| CN104016527A (en) | Textile dyeing wastewater treatment method | |
| JPH0422492A (en) | Separation of polyvinyl alcohol | |
| CN116675323B (en) | Light-mediated Fenton iron mud recycling process | |
| CN216890482U (en) | Main soaking treatment system | |
| RU2116105C1 (en) | Method of cleaning water to remove film, dispersed, and dissolved petroleum products |