JPS5815192B2 - Method for treating wastewater containing polyvinyl alcohol and/or polysaccharides - Google Patents
Method for treating wastewater containing polyvinyl alcohol and/or polysaccharidesInfo
- Publication number
- JPS5815192B2 JPS5815192B2 JP14106880A JP14106880A JPS5815192B2 JP S5815192 B2 JPS5815192 B2 JP S5815192B2 JP 14106880 A JP14106880 A JP 14106880A JP 14106880 A JP14106880 A JP 14106880A JP S5815192 B2 JPS5815192 B2 JP S5815192B2
- Authority
- JP
- Japan
- Prior art keywords
- agent
- wastewater
- polyvinyl alcohol
- polysaccharides
- pva
- 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
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Description
【発明の詳細な説明】
本発明はポリビニルアルコール及び/又は多糖類含有排
水の処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating wastewater containing polyvinyl alcohol and/or polysaccharides.
従来、排水処理剤としては種々のものが提案されている
が、ポリビニルアルコールや多糖類を含有する排水に対
して有効なものは余り知られていない。Various wastewater treatment agents have been proposed in the past, but none are known to be effective against wastewater containing polyvinyl alcohol or polysaccharides.
本発明者らの一部は先にカルシウム・アルミネートと酸
化カルシウムとの混合物からなる処理剤がポリビニルア
ルコールやデンプンを含有する排水の処理に対して好適
であることを見出し、特許出願を行った(特願昭53−
26297号)。Some of the present inventors previously discovered that a treatment agent consisting of a mixture of calcium aluminate and calcium oxide is suitable for treating wastewater containing polyvinyl alcohol and starch, and filed a patent application. (Special application 1973-
No. 26297).
しかしながら、この処理剤の場合、その調製に1200
〜1400℃という高温を必要とすることから、その製
造コストは高くなるという問題を有していた。However, in the case of this treatment agent, 1200
Since it requires a high temperature of ~1400°C, it has had the problem of high manufacturing cost.
本発明者らはこのような問題を解決すべく鋭意研究を重
ねた結果、本発明を完成するに到った。The present inventors have conducted extensive research to solve these problems, and as a result, have completed the present invention.
すなわち、本発明によれば、ポリビニルアルコール及び
/又は多糖類含有排水に対し、酸化カルシウム又は水酸
化カルシウムからなるA剤と、アルミン酸ナトリウムか
らなるB剤を添加し、pH4〜10の条件下においてA
剤とB剤とを反応させることを特徴とするポリビニルア
ルコール及び/又は多糖類含有排水の処理方法が提供さ
れる。That is, according to the present invention, agent A consisting of calcium oxide or calcium hydroxide and agent B consisting of sodium aluminate are added to wastewater containing polyvinyl alcohol and/or polysaccharide, and under conditions of pH 4 to 10. A
Provided is a method for treating wastewater containing polyvinyl alcohol and/or polysaccharides, which comprises reacting an agent with an agent B.
本発明で用いるA剤は酸化カルシウム又は水酸化カルシ
ウムであり、このものは粉末状あるいはスラリー状で用
いられる。Agent A used in the present invention is calcium oxide or calcium hydroxide, which is used in powder or slurry form.
また本発明で用いるB剤はアルミン酸ナトリウムであり
、このものは粉末又は水溶液の形で用いられる。The B agent used in the present invention is sodium aluminate, which is used in the form of powder or aqueous solution.
本発明方法の実施には格別の困難はなく、ポリビニルア
ルコール及び/又は多糖類を含む排水に対し、前記A剤
とB剤を添加し、両者をpH4〜10の条件下でかきま
ぜながら反応させればよい。There is no particular difficulty in implementing the method of the present invention, and the above-mentioned A and B agents are added to wastewater containing polyvinyl alcohol and/or polysaccharides, and the two are reacted while stirring under conditions of pH 4 to 10. Bye.
この場合、A剤及びB剤の添加順序は任意であり、A剤
及びB剤のいずれを最初に加えてもよいし、A剤とB剤
を同時あるいは混合物の形で添加することもできる。In this case, the order of addition of Part A and Part B is arbitrary; either Part A or Part B may be added first, or Parts A and B may be added simultaneously or in the form of a mixture.
A剤とB剤の添加割合は、一般的には、pH4〜10の
条件下において、Al2O3換算のB剤1重量部に対し
、Ca(OH)2 換算のA剤0.5〜10重量部、好
ましくは1〜7重量部の割合である。The addition ratio of agent A and agent B is generally 0.5 to 10 parts by weight of agent A in terms of Ca(OH)2 to 1 part by weight of agent B in terms of Al2O3 under conditions of pH 4 to 10. , preferably in a proportion of 1 to 7 parts by weight.
排水に対する添加量は、B剤はAl2O3として200
〜2000ppm、好ましくは500〜11000pp
の範囲であり、A剤はCa(OH)2 として、少な
くとも200ppm、一般的には500〜5000pp
m、好ましくは1000〜2000ppmの範囲である
。The amount of B agent added to the wastewater is 200% as Al2O3.
~2000ppm, preferably 500-11000ppm
Part A contains at least 200 ppm, typically 500 to 5000 ppm as Ca(OH)2.
m, preferably in the range of 1000 to 2000 ppm.
また、A剤はCa(OH)2として、排水中に含まれる
ポリビニルアルコールや多糖類に対して、1.5重量部
以上、好ましくは2〜5重量部である。Further, the amount of agent A as Ca(OH)2 is 1.5 parts by weight or more, preferably 2 to 5 parts by weight, based on the polyvinyl alcohol and polysaccharides contained in the waste water.
本発明においては、前記したA剤とB剤とを排水中にお
いて反応させるが、この場合、排水のpHは4〜10、
好ましくは5〜8の範囲に保持することが重要である。In the present invention, the above-mentioned A agent and B agent are reacted in waste water, but in this case, the pH of the waste water is 4 to 10,
It is important to keep it preferably in the range of 5 to 8.
排水のpHをこのような範囲に保持しない限り、A剤と
B剤とは円滑に反応せず所期の目的を達成することはで
きない。Unless the pH of the wastewater is maintained within this range, the A and B agents will not react smoothly and the intended purpose cannot be achieved.
従って、処理すべき排水が前記範囲外のpH値を示す場
合、これを適当なpH調節剤により中和して前記範囲の
pH範囲に調整する。Therefore, if the wastewater to be treated has a pH value outside the above range, it is neutralized with a suitable pH regulator to adjust the pH to the above range.
例えば、排水が酸性の場合、力性ソーダなどのアルカリ
性物質をpH調節剤として用いて中和する必要があるが
、本発明の場合、適用するA剤及びB剤がいずれもアル
カリ性を示すことから、pH調節剤として、このA剤又
はB剤あるいはそれら両者を用いることができる。For example, if the wastewater is acidic, it is necessary to neutralize it using an alkaline substance such as sodium hydroxide as a pH adjuster, but in the case of the present invention, since both the A and B agents used are alkaline. The A agent, the B agent, or both can be used as the pH adjuster.
A剤及び/又はB剤をpH調節剤として用いて酸性排水
を調節する場合、そのpH調節後、さらにA剤とB剤の
所要量を加えてA剤とB剤とを反応させる。When controlling acidic wastewater using agent A and/or agent B as a pH adjuster, after adjusting the pH, the required amounts of agent A and agent B are further added to react the agent A and agent B.
また酸性排水fnA剤とB剤を添加する場合、A剤とB
剤の一方あるいはそれらの両方をpH調節な量より過剰
に加えることにより、排水のpH調節と、目的とするp
H4〜10の条件下におけるA剤とB剤の反応を達成す
ることができる。In addition, when adding acidic wastewater fnA agent and B agent, A agent and B agent
By adding one or both of the agents in excess of the pH-adjusting amount, the pH of the wastewater can be adjusted and the desired pH can be achieved.
The reaction between Part A and Part B under conditions of H4-10 can be achieved.
本発明により排水を処理すると、A剤とB剤との反応に
より形成されたアルミン酸カルシウムの作用により、排
水中のポリビニルアルコールやデンプンなどの多糖類は
凝集してフロックを形成し、このフロックは、処理方式
に応じて、沈殿又は浮上分離される。When wastewater is treated according to the present invention, polysaccharides such as polyvinyl alcohol and starch in the wastewater coagulate to form flocs due to the action of calcium aluminate formed by the reaction between agent A and agent B. Depending on the treatment method, it is separated by sedimentation or flotation.
本発明の場合、A剤とB剤とは排水中で反応させること
が重要で、あらかじめ反応させて形成したアルミン酸カ
ルシウムを用いても所期の目的を達成することはできな
い。In the case of the present invention, it is important that the A and B agents are reacted in waste water, and even if calcium aluminate that has been reacted in advance is used, the intended purpose cannot be achieved.
本発明の方法は、カラムや攪拌槽などの種々の反応槽を
用いて実施することができ、ポリビニルアルコールや多
糖類を含む種々の排水の処理法として適用される。The method of the present invention can be carried out using various reaction tanks such as columns and stirring tanks, and is applied as a method for treating various wastewaters containing polyvinyl alcohol and polysaccharides.
この場合、多糖類としては、デンプン、カルボキシメチ
ルセルロース、ヘミセルロースなどが包含される。In this case, the polysaccharide includes starch, carboxymethylcellulose, hemicellulose, and the like.
本発明の適用し得る排水の例を挙げると、繊維工業にお
ける糊ぬき排水(ポリビニルアルコールとデンプン含有
)や、製紙工業における表面サイズ工程排水、故紙排水
、合成高分子の懸濁重合の際の乳化剤排水、家庭用洗濯
製造排水、ポリビニルホルマール樹脂やポリビニルブチ
ラール樹脂の製造排水などが挙げられる。Examples of wastewater to which the present invention can be applied include desizing wastewater (containing polyvinyl alcohol and starch) in the textile industry, surface size process wastewater in the paper industry, wastepaper wastewater, and emulsifiers during suspension polymerization of synthetic polymers. Examples include wastewater, household laundry manufacturing wastewater, and manufacturing wastewater of polyvinyl formal resin and polyvinyl butyral resin.
次に本発明を実施例によりさらに詳細に説明する。Next, the present invention will be explained in more detail with reference to Examples.
実施例 1
和光紬薬工業(株)製 重合度約1500のポリビニル
アルコール(PVA)を温水に溶かし、PVAとして5
00ppmを含む溶液(pH=6.66)に水酸化カル
シウム(A剤)0.1係(w/v%)を添加し、さらに
酸化アルミニウムとして5.0%のアルミン酸ナトリウ
ム水溶液(B剤)の添加量を変えて加え、室温で回転速
度360rpmの条件下で30分かきまぜ、15分放置
したのち、内容物を口紙により口過した。Example 1 Polyvinyl alcohol (PVA) manufactured by Wako Tsumugi Kogyo Co., Ltd. with a degree of polymerization of approximately 1500 was dissolved in warm water to obtain 5% PVA.
Calcium hydroxide (A agent) 0.1% (w/v%) was added to a solution containing 00 ppm (pH = 6.66), and further a 5.0% sodium aluminate aqueous solution (B agent) was added as aluminum oxide. The mixture was added in varying amounts, stirred at room temperature for 30 minutes at a rotation speed of 360 rpm, left to stand for 15 minutes, and then the contents were passed through a mouthpiece.
次にこのようにして得た口液中に含まれる残存PVAを
調べた。Next, residual PVA contained in the oral fluid thus obtained was examined.
口液中のPVAはホウ酸を用いるヨード呈色法でその量
を測定し、その結果から水溶液中のPVAの除去率を示
した。The amount of PVA in the oral fluid was measured by an iodine coloring method using boric acid, and the removal rate of PVA in the aqueous solution was shown from the results.
その結果を第1表に示す。The results are shown in Table 1.
実施例 2
PVA濃度を11000ppにしたpH6,79の溶液
に水酸化カルシウム(A剤)を0.2%(w/v%)添
加後、アルミン酸ナトリウム(B剤)の添加量を変えて
加え、実施例1と同様に実験した。Example 2 After adding 0.2% (w/v%) of calcium hydroxide (A agent) to a solution with a pH of 6,79 with a PVA concentration of 11,000 pp, sodium aluminate (A agent) was added in varying amounts. , The experiment was conducted in the same manner as in Example 1.
その結果を第2表に示す。The results are shown in Table 2.
比較例 1
実施例1と同一のPVA濃度の溶液に希塩酸を加え−を
2に調整した溶液に水酸化カルシウム(A剤)0.1%
(w/v%)を添加後、アルミン酸ナトリウム水溶液(
B剤)の量を変えて加え、実施例1と同様に実験した。Comparative Example 1 0.1% calcium hydroxide (A agent) was added to a solution with the same PVA concentration as in Example 1 by adding dilute hydrochloric acid to adjust the - to 2.
(w/v%), then add sodium aluminate aqueous solution (
An experiment was conducted in the same manner as in Example 1 by adding different amounts of agent B).
その結果を第3表に示す。The results are shown in Table 3.
第3表に示した結果からpHが2ではPVAの除去率が
悪いことがわかる。From the results shown in Table 3, it can be seen that the removal rate of PVA is poor at pH 2.
比較例 2
実施例1と同一のPVA濃度の溶液に希水酸化ナトリウ
ム水溶液を加えpHを12に調整した溶液に水酸化カル
シウム(A剤)0.1%(W/v%)を添加後、アルミ
ン酸ナトリウム水溶液(B剤)の量を変えて加え、実施
例1と同様に実験した。Comparative Example 2 After adding 0.1% (W/v%) of calcium hydroxide (A agent) to a solution with the same PVA concentration as Example 1 and adjusting the pH to 12 by adding a dilute aqueous sodium hydroxide solution, An experiment was carried out in the same manner as in Example 1, adding different amounts of the sodium aluminate aqueous solution (Part B).
その結果を第4表に示す。The results are shown in Table 4.
第4表に示した結果からpHが12ではPVAの除去率
の悪いことがわかる。From the results shown in Table 4, it can be seen that the removal rate of PVA is poor at pH 12.
実施例 3
実施例1で使用したPVAと牛丼化学薬品(ハ)製カル
ボオキシメチルセルローズナトリウム塩(CMC)を温
水に溶かし、各々11000pp。Example 3 PVA used in Example 1 and carboxymethyl cellulose sodium salt (CMC) manufactured by Gyudon Chemicals (Ha) were dissolved in warm water to give 11,000 pp each.
500ppmを含む混合溶液を作り希塩酸、希水酸化ナ
トリウム水溶液でpHを7に調整した。A mixed solution containing 500 ppm was prepared and the pH was adjusted to 7 with dilute hydrochloric acid and dilute aqueous sodium hydroxide solution.
該液200−に水酸化カルシウム(A剤)0.4%(w
/v%)を速度350rpmでかきまぜながら加え、さ
らにアルミン酸ナトリウム水溶液(B剤)の添加量を変
えて加え、室温で30分かきまぜ、内容物を5分間20
00rpmの速さで遠心分離し、うわずみ液を口紙で口
過した。Calcium hydroxide (agent A) 0.4% (w
/v%) was added while stirring at a speed of 350 rpm, and then added the sodium aluminate aqueous solution (Part B) in varying amounts, stirred at room temperature for 30 minutes, and stirred the contents for 5 minutes at 20 minutes.
The mixture was centrifuged at a speed of 0.00 rpm, and the suspension was passed through a mouthpiece.
次にこのようにして得た口液中に含まれる残存PVA、
化学的酸素要求量(COD)を調べ、水溶液中のPVA
、CODの除去率を示した。Next, residual PVA contained in the oral fluid obtained in this way,
To investigate the chemical oxygen demand (COD) of PVA in aqueous solution
, showed the removal rate of COD.
その結果を第5表に示す。実施例 4
実施例1で使用したPVAと国産化学(株)製可溶性殿
粉を温水に溶かし、各々1000ppm1000ppを
含む混合溶液を作り、希塩酸、希水酸化ナトリウム水溶
液でpHを7に調整した。The results are shown in Table 5. Example 4 PVA used in Example 1 and soluble starch manufactured by Kokusan Kagaku Co., Ltd. were dissolved in warm water to prepare a mixed solution containing 1000 ppm of each, and the pH was adjusted to 7 with dilute hydrochloric acid and dilute aqueous sodium hydroxide solution.
該液に水酸化カルシウム(A剤)とアルミン酸ナトリウ
ム水溶液(B剤)を実施例3と同様に加え試験を行った
。Calcium hydroxide (A agent) and sodium aluminate aqueous solution (B agent) were added to the solution in the same manner as in Example 3, and a test was conducted.
その結果を第6表に示す。実施例 5
PVAを含む濃度ポリビニルホルマール製造廃水を純水
にてPVAとして11000ppになるよう希釈したも
のを廃水(pH6,68)とした。The results are shown in Table 6. Example 5 Concentration polyvinyl formal production wastewater containing PVA was diluted with pure water to 11,000 pp of PVA to obtain wastewater (pH 6.68).
その廃水に水酸化カルシウム(A剤)とアルミン酸ナト
リウム(B剤)を実施例3と同様に加え試験を行った。Calcium hydroxide (Part A) and sodium aluminate (Part B) were added to the wastewater in the same manner as in Example 3, and a test was conducted.
その結果を第7表に示す。実施例 6
PVAとして33ppmを含む故紙再生廃水(pH9,
3)に酸化カルシウム(A剤)0.3%(w/v%)ア
ルミン酸ナトリウム水溶液(B剤)の添加量を変えて加
え、実施例3と同様に実験した。The results are shown in Table 7. Example 6 Waste paper recycled wastewater containing 33 ppm of PVA (pH 9,
The same experiment as in Example 3 was carried out by adding 0.3% (w/v%) calcium oxide (A agent) and sodium aluminate aqueous solution (B agent) to 3) in different amounts.
Claims (1)
し、酸化カルシウム又は水酸化カルシウムからなるA剤
と、アルミン酸ナトリウムからなるB剤を添加し、pH
4〜10の条件下においてA剤とB剤とを反応させるこ
とを特徴とするポリビニルアルコール及び/又は多糖類
含有排水の処理方法。1 Add agent A consisting of calcium oxide or calcium hydroxide and agent B consisting of sodium aluminate to polyvinyl alcohol and/or polysaccharide-containing wastewater, and adjust the pH.
A method for treating polyvinyl alcohol and/or polysaccharide-containing wastewater, which comprises reacting agent A and agent B under conditions of 4 to 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14106880A JPS5815192B2 (en) | 1980-10-08 | 1980-10-08 | Method for treating wastewater containing polyvinyl alcohol and/or polysaccharides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14106880A JPS5815192B2 (en) | 1980-10-08 | 1980-10-08 | Method for treating wastewater containing polyvinyl alcohol and/or polysaccharides |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5765382A JPS5765382A (en) | 1982-04-20 |
JPS5815192B2 true JPS5815192B2 (en) | 1983-03-24 |
Family
ID=15283485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14106880A Expired JPS5815192B2 (en) | 1980-10-08 | 1980-10-08 | Method for treating wastewater containing polyvinyl alcohol and/or polysaccharides |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5815192B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3266711B2 (en) * | 1993-09-22 | 2002-03-18 | 株式会社クラレ | Wastewater treatment method |
US6207059B1 (en) * | 1998-03-23 | 2001-03-27 | Achemco, Inc. | Process for treating wastewater |
-
1980
- 1980-10-08 JP JP14106880A patent/JPS5815192B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5765382A (en) | 1982-04-20 |
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