JPH07185564A - Treatment of ink dissolution waste solution - Google Patents
Treatment of ink dissolution waste solutionInfo
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- JPH07185564A JPH07185564A JP33041993A JP33041993A JPH07185564A JP H07185564 A JPH07185564 A JP H07185564A JP 33041993 A JP33041993 A JP 33041993A JP 33041993 A JP33041993 A JP 33041993A JP H07185564 A JPH07185564 A JP H07185564A
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- solution
- ink
- waste liquid
- waste solution
- waste
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プリント基板に適用す
るアルカリ剥離型スクリーン印刷インキの溶解廃液の処
理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of treating a waste solution of an alkali peeling type screen printing ink applied to a printed circuit board.
【０００２】[0002]
【従来の技術】従来行われているこの種の廃液の処理方
法を図２に示す。アルカリ性のインキ溶解廃液２１は、
反応槽２３内で酸２２の添加によって酸性に変換され、
粘性のあるインキ成分が分離され、静置後、インク成分
主体の沈降層は汚泥槽２４へ、上澄液は上澄液受槽２５
へそれぞれ移送される（一次処理）。2. Description of the Related Art FIG. 2 shows a conventional method for treating this kind of waste liquid. The alkaline ink dissolving waste liquid 21 is
In the reaction tank 23, it is converted into acid by the addition of the acid 22,
After the viscous ink component is separated and allowed to stand, the sediment layer mainly composed of the ink component is transferred to the sludge tank 24, and the supernatant liquid is transferred to the supernatant liquid receiving tank 25.
To each (primary treatment).
【０００３】次に、汚泥槽２４のインキ成分主体の汚泥
は、凝集沈殿槽２７の汚泥３１と共にフィルタプレス２
８によって濾過・脱水され、その脱水廃液２９は、工場
内の他の凝集沈殿被処理排水３０に混入される。上澄液
受槽２５の上澄液は、混和槽２６に少量ずつ連続注入さ
れ、汚泥脱水廃液２９及び工場内の他の被処理排水３０
と共に、凝集剤及び凝集助剤の添加・共存下で混合・攪
拌され、凝集沈殿槽２７にて凝集沈殿処理が行われる。Next, the sludge mainly containing the ink components in the sludge tank 24 is filtered together with the sludge 31 in the coagulating sedimentation tank 27 by the filter press 2.
It is filtered and dehydrated by 8, and the dehydrated waste liquid 29 is mixed with another waste water 30 for coagulation sedimentation in the factory. The supernatant liquid of the supernatant liquid receiving tank 25 is continuously injected little by little into the mixing tank 26, and the sludge dewatering waste liquid 29 and other treated wastewater 30 in the factory are processed.
At the same time, the aggregating agent and the aggregating auxiliary agent are added and mixed and agitated in the coexisting state, and the aggregating and sedimenting treatment is performed in the aggregating and sedimenting tank 27.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の処理方法に
おいては、上澄液及び汚泥脱水廃液（一次処理廃液）の
ＢＯＤ（生物化学的酸素要求量）値が極めて高く、以降
の二次処理及び三次処理への負担が大となり、これがた
め降流設備の大型化やランニングコストの増大をもたら
すことになる。このため、一次処理廃液のＢＯＤ値を出
来るだけ低くする効果的なインキ溶解廃液の処理方法の
開発が望まれている。In the above conventional treatment method, the BOD (biochemical oxygen demand) value of the supernatant liquid and the sludge dewatering waste liquid (primary treatment waste liquid) is extremely high, and the subsequent secondary treatment and The burden on the tertiary treatment becomes large, which causes an increase in downflow equipment and an increase in running cost. For this reason, it is desired to develop an effective method for treating the ink-dissolving waste liquid, which makes the BOD value of the primary-treatment waste liquid as low as possible.
【０００５】従って、本発明は、上記問題点に着目して
なされたもので、一次処理廃液のＢＯＤ値を低くするこ
とができるインキ溶解廃液の処理方法を提供することを
目的とする。Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a method for treating an ink-dissolving waste liquid capable of lowering the BOD value of the primary treatment waste liquid.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するため
に、本発明のインキ溶解廃液の処理方法は、プリント基
板製造におけるアルカリ剥離型スクリーン印刷インキの
溶解廃液に酸を添加することによりｐＨを１．５〜３．
５に調整する第１の工程と、このｐＨ調整後のインキ溶
解廃液に空気を吹き込み攪拌しながら、第二鉄化合物溶
液とアルカリ溶液とを交互に添加してｐＨを２〜７に保
持した状態で沈殿を生成させる第２の工程とからなるこ
とを特徴とする。In order to achieve the above-mentioned object, the method for treating an ink-dissolving waste liquid of the present invention is to adjust the pH by adding an acid to the dissolving waste liquid of an alkaline stripping type screen printing ink in the production of printed circuit boards. 1.5-3.
The first step of adjusting the pH to 5 and the state in which the pH was maintained at 2 to 7 by alternately adding the ferric compound solution and the alkaline solution while blowing air into the ink-dissolving waste liquid after the pH adjustment and stirring. The second step of producing a precipitate in 1.
【０００７】[0007]
【作用】本発明の処理方法によると、第１の工程により
アルカリ性のインキ溶解廃液を酸性に変換してインキ成
分を分離させた後、分離インキ成分を除去することなく
廃液に空気を吹き込み攪拌しながら、第２の工程におい
て第二鉄化合物溶液とアルカリ溶液とを交互に加え、酸
化及び鉄イオンとの反応並びに沈殿・凝集を促進させた
後、廃液の全量を濾過・脱水することにより、一次処理
廃液のＢＯＤ値を従来の処理方法よりも大幅に低減する
ことができる。According to the treatment method of the present invention, after the alkaline ink-dissolving waste liquid is converted into acid by the first step to separate the ink components, air is blown into the waste liquid and agitated without removing the separated ink components. However, in the second step, a ferric compound solution and an alkaline solution are alternately added to promote oxidation and reaction with iron ions and precipitation / aggregation, and then the whole amount of the waste liquid is filtered / dehydrated to obtain a primary solution. The BOD value of the treatment waste liquid can be significantly reduced as compared with the conventional treatment method.
【０００８】本発明の処理方法によりインキ溶解廃液を
一次処理した廃液のＢＯＤ値が著しく低減することの理
論は、次のように推察される。プリント基板製造におけ
るアルカリ剥離型スクリーン印刷インキは主にエステル
系であることから、そのアルカリ剥離液中にはエステル
の加水分解生成物がアルカリ陽イオンと結合・溶存して
おり、これが廃液のＢＯＤ値を高める原因となってい
る。従って、廃液を酸性に変換すれば加水分解生成物の
アルカリ陽イオンが水素イオンと置換され、その結果、
加水分解生成物の一部が水不溶性となり、分離・凝集す
ることができる。しかし、低分子量の加水分解生成物は
廃液中になおかなり溶存しており、酸性化による分離・
凝集物を除去した後においても、廃液のＢＯＤ値はイン
キ成分にもよるが依然７０００〜１３０００ｐｐｍにも
達している。The theory that the BOD value of the waste liquid obtained by primarily treating the ink-dissolving waste liquid by the treatment method of the present invention is remarkably reduced is presumed as follows. Since the alkaline stripping type screen printing ink in the production of printed circuit boards is mainly an ester type, the hydrolysis product of the ester is bound and dissolved in the alkaline stripping solution in the alkaline stripping solution, which is the BOD value of the waste solution. Is a cause of increasing. Therefore, if the waste liquid is converted to acid, the alkali cations of the hydrolysis product are replaced with hydrogen ions, and as a result,
Part of the hydrolysis product becomes insoluble in water and can be separated and aggregated. However, the hydrolysis products of low molecular weight are still quite dissolved in the waste liquor, and separation by acidification
Even after removing the agglomerates, the BOD value of the waste liquid still reaches 7,000 to 13,000 ppm, depending on the ink components.
【０００９】ところで、酸性化後、なお溶存している加
水分解生成物は、分子中に−ＯＨ基、−ＣＯＯＨ基等を
有するＣ−Ｈ飽和或いは不飽和の有機化合物であり、適
正なｐＨにおいてＣａ，Ｆｅ，Ａｌ等と結合・沈殿する
ものがあり、更には鉄、アルミニウムの多孔質水酸化物
に吸着・共沈するものもある。又、廃液に空気を吹き込
みながら攪拌することにより、前記加水分解生成物によ
り還元されるＦｅ2+のＦｅ3+への酸化及び加水分解生成
物自体の酸化並びに鉄イオンによるＢＯＤ成分の触媒酸
化等の複合的な作用がもたらされる。更に、高濃度の第
二鉄化合物溶液及びアルカリ溶液を用いることにより、
これら溶液の添加による一次処理廃液の増量が最少限に
抑えられるばかりでなく、一般的に高濃度溶液下での沈
殿・凝集反応が低濃度溶液下よりも効果的である。Incidentally, the hydrolyzed product still dissolved after acidification is a C—H saturated or unsaturated organic compound having —OH group, —COOH group, etc. in the molecule, and at a proper pH. Some of them may be bound and precipitated with Ca, Fe, Al, etc., and some of them may be adsorbed and coprecipitated on porous hydroxides of iron and aluminum. Further, by stirring the waste liquid while blowing air, oxidation of Fe 2+ reduced by the hydrolysis product to Fe 3+ , oxidation of the hydrolysis product itself, catalytic oxidation of BOD component by iron ion, etc. The complex action of is brought about. Furthermore, by using a high concentration ferric compound solution and an alkaline solution,
The addition of these solutions not only minimizes the increase in the amount of the primary treatment waste liquid, but generally the precipitation / aggregation reaction under a high-concentration solution is more effective than under a low-concentration solution.
【００１０】従って、本発明の処理方法の適用により、
インキ溶解廃液の一次処理後のＢＯＤ値は、従来の処理
方法の１／１３〜１／９に大幅に低減されることにな
る。なお、本発明の処理方法において、第１の工程でア
ルカリ性のインキ溶解廃液に添加する酸としては、廃液
のｐＨを１．５〜３．５に調整できるものであればよ
く、硫酸、塩酸、硝酸等が例示される。第２の工程で添
加する第二鉄化合物としては、塩化第二鉄、硫酸第二
鉄、硫酸第二鉄アンモニウム、硝酸第二鉄、硝酸第二鉄
アンモニウム等が示され、これらの第二鉄化合物の高濃
度溶液（濃度１０〜４０Ｗｔ％程度）を用いる。更に、
アルカリ溶液としては、水酸化ナトリウム、水酸化カリ
ウム、水酸化カルシウムスラリー等のアルカリ化合物の
高濃度溶液（濃度１０〜６０Ｗｔ％程度）を用いる。Therefore, by applying the processing method of the present invention,
The BOD value after the primary treatment of the ink-dissolving waste liquid is greatly reduced to 1/13 to 1/9 of that of the conventional treatment method. In the treatment method of the present invention, the acid added to the alkaline ink-dissolving waste liquid in the first step may be any acid that can adjust the pH of the waste liquid to 1.5 to 3.5, such as sulfuric acid, hydrochloric acid, Nitric acid etc. are illustrated. Examples of the ferric compound added in the second step include ferric chloride, ferric sulfate, ferric ammonium sulfate, ferric nitrate, ferric ammonium nitrate, and the like. A high concentration solution of the compound (concentration of about 10 to 40 Wt%) is used. Furthermore,
As the alkali solution, a high-concentration solution (concentration of about 10 to 60 Wt%) of an alkali compound such as sodium hydroxide, potassium hydroxide, or calcium hydroxide slurry is used.
【００１１】又、第１の工程ではｐＨを１．５〜３．５
に調整するが、ｐＨが１．５よりも低ければ、インキ成
分の分離・凝集が速すぎて大塊状となり、配管ラインの
閉塞原因になり易く、ｐＨが３．５よりも高ければ、イ
ンキ成分の分離・凝集に長時間を要することになるた
め、ｐＨは１．５〜３．５の範囲に調整するのが好まし
い。In the first step, the pH is adjusted to 1.5 to 3.5.
If the pH is lower than 1.5, the separation and aggregation of the ink components will be too fast to form a large lump, which will easily cause the clogging of the piping line. If the pH is higher than 3.5, the ink components will be blocked. Since it takes a long time to separate and aggregate, it is preferable to adjust the pH within the range of 1.5 to 3.5.
【００１２】一方、第２の工程ではｐＨを２〜７に保持
するが、ｐＨが２よりも低ければ、鉄と反応・生成した
沈殿物の再溶解が始まり、ｐＨが７よりも高ければ、凝
集分離したインキ成分の再溶解が始まるため、ｐＨは２
〜７が好ましい。On the other hand, in the second step, the pH is maintained at 2 to 7, but if the pH is lower than 2, the redissolution of the precipitate that has reacted with iron and is started, and if the pH is higher than 7, Since the ink components that have been separated by aggregation start to be redissolved, the pH is 2
~ 7 are preferred.
【００１３】[0013]
【実施例】以下、本発明の処理方法を実施例に基づいて
説明する。図１に、その処理系統の概略フロー図を示
す。２．０６ｍ3 のインキ溶解廃液１を反応槽３に投入
し、この廃液を攪拌しながらｐＨが約２．８になるま
で、酸として２０Ｗｔ％の硫酸２を徐々に加える。〔工
程〕 次に、上記廃液に空気ａを吹き込みながら攪拌しつつ、
ｐＨが約２．０になるまで、第二鉄化合物溶液として３
７Ｗｔ％の塩化第二鉄水溶液ｂを徐々に加える。ここ
で、空気ａの吹き込み量に制約はないが、吹き込み量が
多いほど酸化が促進されることは言うまでもない。又、
塩化第二鉄に代えて、例えば硫酸第二鉄或いは両者を併
用しても差し支えない。〔工程〕 続いて、暫時攪拌した後、今度は廃液にアルカリ溶液と
して２０Ｗｔ％の水酸化ナトリウム水溶液ｃをｐＨが約
７に達するまで徐々に加える。ここでも、水酸化ナトリ
ウムに代えて、例えば水酸化カリウム或いは両者を併用
しても差し支えない。〔工程〕 上記工程，を所要量の塩化第二鉄水溶液ｂを全て加
え終わるまで交互に繰り返す。但し、塩化第二鉄の所要
量は溶解しているインキの濃度に左右されるので、例え
ば予めビーカーテストにより求めておく。EXAMPLES The processing method of the present invention will be described below based on examples. FIG. 1 shows a schematic flow chart of the processing system. 2.06 m 3 of the ink-dissolving waste liquid 1 is put into the reaction tank 3, and 20 Wt% sulfuric acid 2 as an acid is gradually added to the waste liquid while stirring until the pH becomes about 2.8. [Step] Next, while agitating while blowing air a into the waste liquid,
3 as ferric compound solution until pH is about 2.0
A 7 wt% ferric chloride aqueous solution b is gradually added. Here, there is no restriction on the blowing amount of the air a, but it goes without saying that the larger the blowing amount, the more the oxidation is promoted. or,
Instead of ferric chloride, for example, ferric sulfate or both may be used in combination. [Step] Subsequently, after stirring for a while, this time, a 20 Wt% aqueous sodium hydroxide solution c as an alkaline solution is gradually added to the waste liquid until the pH reaches about 7. Again, for example, potassium hydroxide or both may be used in combination in place of sodium hydroxide. [Step] The above steps are alternately repeated until the required amount of ferric chloride aqueous solution b is completely added. However, since the required amount of ferric chloride depends on the concentration of the dissolved ink, it is determined in advance by, for example, a beaker test.
【００１４】最終的には処理液のｐＨを５．５〜７にな
るように調整した後、フィルタプレス８を用いて濾過・
脱水する。これにより、脱水廃液（一次処理廃液）のＢ
ＯＤ値は、インキ成分にもよるが９７０〜１７００ｐｐ
ｍになり、従来の処理方法による一次処理廃液のＢＯＤ
値７０００〜１３０００ｐｐｍに比べて大幅に低減され
る。Finally, the pH of the treatment liquid is adjusted to 5.5 to 7 and then filtered with a filter press 8.
Dehydrate. As a result, B of the dehydrated waste liquid (primary treatment waste liquid)
The OD value depends on the ink component, but it is 970 to 1700 pp
m, and the BOD of the primary treatment waste liquid by the conventional treatment method
It is significantly reduced compared to the value of 7,000 to 13,000 ppm.
【００１５】一次処理後の脱水廃液は、上澄液受槽５に
移送され、更に上澄液受槽５から混和槽６に少量ずつ連
続注入され、汚泥脱水廃液９及び工場内の他の被処理排
水１０と共に、凝集剤及び凝集助剤の添加・共存下で混
合・攪拌され、凝集沈殿槽７にて凝集沈殿処理が行われ
る。そして、凝集沈殿槽７の汚泥１１は、汚泥槽４に移
送された後、フィルタプレス８’によって濾過・脱水さ
れ、その脱水廃液９は前記一次処理後の脱水廃液及び被
処理排水１０と一緒に混和槽６に注入される。The dewatered waste liquid after the primary treatment is transferred to the supernatant liquid receiving tank 5, and further continuously injected little by little from the supernatant liquid receiving tank 5 into the mixing tank 6, and the sludge dewatering waste liquid 9 and other waste water to be treated in the factory are treated. A coagulant and a coagulant auxiliary agent are added and co-mixed with 10, and coagulated and sedimented in a coagulative sedimentation tank 7. Then, the sludge 11 in the coagulating sedimentation tank 7 is transferred to the sludge tank 4 and then filtered and dehydrated by the filter press 8 ′, and the dehydrated waste liquid 9 is put together with the dehydrated waste liquid after the primary treatment and the treated waste water 10. It is poured into the mixing tank 6.
【００１６】[0016]
【発明の効果】以上説明したように、本発明の処理方法
では、酸の添加後に第二鉄化合物溶液とアルカリ溶液を
交互に添加することにより沈殿を生成させるから、プリ
ント基板製造におけるアルカリ剥離型スクリーン印刷イ
ンキの溶解廃液の処理が容易となり、一次処理廃液のＢ
ＯＤ値が従来の処理方法より著しく低減され、降流の廃
水処理設備への負担が軽くなり、それらの設備の小型化
及びランニングコストの低減等、経済的効果が大であ
る。As described above, in the treatment method of the present invention, since the precipitate is formed by alternately adding the ferric compound solution and the alkaline solution after the addition of the acid, the alkaline stripping method in the production of the printed circuit board is used. Disposal of the screen printing ink dissolution waste liquid becomes easier, and the primary processing waste liquid B
The OD value is remarkably reduced as compared with the conventional treatment method, the burden on the downstream wastewater treatment facility is lightened, and the economical effect is large, such as miniaturization of the facility and reduction of running cost.
【図１】本発明の処理方法による処理系統の概略フロー
図である。FIG. 1 is a schematic flow diagram of a processing system according to a processing method of the present invention.
【図２】従来の処理方法による処理系統の概略フロー図
である。FIG. 2 is a schematic flowchart of a processing system according to a conventional processing method.
１ インキ溶解廃液 ２ 酸 ３ 反応槽 ａ 空気 ｂ 第二鉄化合物溶液 ｃ アルカリ溶液 1 Ink Dissolving Waste Liquid 2 Acid 3 Reaction Tank a Air b Ferric Compound Solution c Alkaline Solution
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中根 武美 熊本県玉名市大字玉名字石尺595番地の１ 株式会社京写内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takemi Nakane 1 595 Ishima, Tamana, Kanamoto, Kanamoto Kyosha Co., Ltd.
Claims (2)
スクリーン印刷インキの溶解廃液を処理する方法であっ
て、前記インキ溶解廃液に酸を添加することによりｐＨ
を１．５〜３．５に調整する第１の工程と、このｐＨ調
整後のインキ溶解廃液に空気を吹き込み攪拌しながら、
第二鉄化合物溶液とアルカリ溶液とを交互に添加してｐ
Ｈを２〜７に保持した状態で沈殿を生成させる第２の工
程とからなることを特徴とするインキ溶解廃液の処理方
法。1. A method for treating a waste solution of an alkaline stripping type screen printing ink in the production of a printed circuit board, which comprises adding an acid to the waste solution of the ink to adjust pH.
In the first step of adjusting the pH to 1.5 to 3.5, and by blowing air into the ink-dissolving waste liquid after the pH adjustment while stirring,
Alternately adding ferric compound solution and alkaline solution
A second step of forming a precipitate while H is kept at 2 to 7, and a method for treating an ink-dissolving waste liquid.
液又は／及び硫酸第二鉄水溶液であり、前記アルカリ溶
液は、水酸化ナトリウム水溶液又は／及び水酸化カリウ
ム水溶液であることを特徴とする請求項１記載のインキ
溶解廃液の処理方法。2. The ferric compound solution is an aqueous ferric chloride solution and / or an aqueous ferric sulfate solution, and the alkaline solution is an aqueous sodium hydroxide solution and / or an aqueous potassium hydroxide solution. The method for treating an ink-dissolving waste liquid according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33041993A JP2823794B2 (en) | 1993-12-27 | 1993-12-27 | Treatment method of ink dissolution waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33041993A JP2823794B2 (en) | 1993-12-27 | 1993-12-27 | Treatment method of ink dissolution waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07185564A true JPH07185564A (en) | 1995-07-25 |
| JP2823794B2 JP2823794B2 (en) | 1998-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33041993A Expired - Fee Related JP2823794B2 (en) | 1993-12-27 | 1993-12-27 | Treatment method of ink dissolution waste liquid |
Country Status (1)
| Country | Link |
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| JP (1) | JP2823794B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496088A (en) * | 2014-11-25 | 2015-04-08 | 苏州中亚油墨有限公司 | Water-based ink wastewater treatment process |
| CN104909487A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | High-concentration printing ink waste liquid treatment and sludge dewatering integration method and high-concentration printing ink waste liquid treatment and sludge dewatering integration apparatus |
| CN104909486A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | Printing ink waste liquid and metal acid washing waste liquid combination treatment method |
| CN104909485A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | Printing ink waste liquid treatment and sludge dewatering method |
| CN105084578A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
| CN105084577A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
-
1993
- 1993-12-27 JP JP33041993A patent/JP2823794B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909487A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | High-concentration printing ink waste liquid treatment and sludge dewatering integration method and high-concentration printing ink waste liquid treatment and sludge dewatering integration apparatus |
| CN104909486A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | Printing ink waste liquid and metal acid washing waste liquid combination treatment method |
| CN104909485A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | Printing ink waste liquid treatment and sludge dewatering method |
| CN105084578A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
| CN105084577A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
| CN105084577B (en) * | 2014-05-05 | 2017-05-10 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
| CN104496088A (en) * | 2014-11-25 | 2015-04-08 | 苏州中亚油墨有限公司 | Water-based ink wastewater treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2823794B2 (en) | 1998-11-11 |
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