JPH1147758A - Treatment of water containing minute suspended substance - Google Patents
Treatment of water containing minute suspended substanceInfo
- Publication number
- JPH1147758A JPH1147758A JP21206897A JP21206897A JPH1147758A JP H1147758 A JPH1147758 A JP H1147758A JP 21206897 A JP21206897 A JP 21206897A JP 21206897 A JP21206897 A JP 21206897A JP H1147758 A JPH1147758 A JP H1147758A
- Authority
- JP
- Japan
- Prior art keywords
- added
- polymer flocculant
- condensate
- flocculant
- fine suspension
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000000126 substance Substances 0.000 title abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 25
- 229920000768 polyamine Polymers 0.000 claims abstract description 21
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 239000002351 wastewater Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920006318 anionic polymer Polymers 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 239000000701 coagulant Substances 0.000 claims description 25
- 239000000725 suspension Substances 0.000 claims description 24
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 abstract description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 4
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 abstract description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 4
- 125000002947 alkylene group Chemical group 0.000 abstract description 4
- 125000005263 alkylenediamine group Chemical group 0.000 abstract description 3
- 229910021529 ammonia Inorganic materials 0.000 abstract description 2
- 125000000129 anionic group Chemical group 0.000 abstract description 2
- 229920006317 cationic polymer Polymers 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 abstract 1
- -1 aluminum sulfate Chemical compound 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 17
- 229920002401 polyacrylamide Polymers 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- QCOGKXLOEWLIDC-UHFFFAOYSA-N N-methylbutylamine Chemical compound CCCCNC QCOGKXLOEWLIDC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 229920006322 acrylamide copolymer Polymers 0.000 description 2
- 229940048053 acrylate Drugs 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- GVWISOJSERXQBM-UHFFFAOYSA-N n-methylpropan-1-amine Chemical compound CCCNC GVWISOJSERXQBM-UHFFFAOYSA-N 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 229940047670 sodium acrylate Drugs 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は微細懸濁物含有水の
処理方法に関し、特に製紙工場などから排出される廃水
に代表されるような微細懸濁物の含有水の処理方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating water containing fine suspension, and more particularly to a method for treating water containing fine suspension such as wastewater discharged from a paper mill.
【０００２】[0002]
【従来の技術】紙パルプ工業などでは微細懸濁物を含有
する廃水を排出する。製紙工程にはクリーニング工程、
蒸解工程、漂白工程、抄紙工程など、大量の水を不可欠
すとるプロセスが多く含まれるため、生じる廃水の量も
膨大である。水を多量に使用する紙パルプ業界などで
は、こうした廃水処理に多大なコストと労力を懸けてい
る。環境保護問題が重視されつつある現在、その負担は
更に増大している。製紙廃水などの微細懸濁物含有水か
ら懸濁物を除去する方法としては、これまで複数の凝集
剤を併用して凝集処理することが一般に行われている。
例えばひとつは硫酸バンドやポリ塩化アルミニウムなど
の無機凝集剤であり。これに、ポリアクリルアミドまた
はその部分加水分解物などのノニオン性あるいはアニオ
ン性の高分子凝集剤を併用する。2. Description of the Related Art In the pulp and paper industry and the like, wastewater containing fine suspension is discharged. Cleaning process in papermaking process,
Since many processes that require a large amount of water, such as the digestion process, the bleaching process, and the papermaking process, are included, the amount of wastewater generated is enormous. In the pulp and paper industry, which uses a large amount of water, such wastewater treatment involves a great deal of cost and labor. The burden of environmental protection is becoming more important nowadays. As a method of removing a suspended matter from water containing fine suspended matter such as papermaking wastewater, a flocculation treatment has been generally performed so far using a plurality of flocculants in combination.
For example, one is an inorganic flocculant such as a sulfate band or polyaluminum chloride. A nonionic or anionic polymer coagulant such as polyacrylamide or a partial hydrolyzate thereof is used in combination therewith.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、古紙パ
ルプ廃水等、微細懸濁物を含有する水の処理において、
上記の従来の方法は、懸濁物質の凝集効率が低い。凝集
に長時間を要する。かつ、微細な懸濁物質がなお廃水中
に浮遊するという欠点を有していた。そこで本発明者ら
はこのような状況に鑑み、微細な懸濁物質も迅速に凝集
沈殿させる方法について鋭意検討した結果、本発明を完
成するに至った。すなわち本発明は、懸濁物質を短時間
に効率よく凝集沈殿できる微細懸濁物の処理方法を提供
することを目的とする。However, in the treatment of water containing fine suspensions, such as waste paper pulp wastewater,
The conventional methods described above have a low flocculation efficiency of the suspended substance. It takes a long time for aggregation. In addition, there is a disadvantage that the fine suspended matter still floats in the wastewater. In view of such a situation, the present inventors have conducted intensive studies on a method for rapidly coagulating and sedimenting fine suspended substances, and as a result, have completed the present invention. That is, an object of the present invention is to provide a method for treating a fine suspension in which a suspended substance can be efficiently aggregated and precipitated in a short time.
【０００４】[0004]
【課題を解決するための手段】上記の課題は下記の手段
によって達成できる。 （１）微細懸濁物含有水に対し、縮合系ポリアミンと無
機凝集剤を添加した後、高分子凝集剤を添加することを
特徴とする微細懸濁物含有水の処理方法。 （２）該微細懸濁物含有水が製紙廃水であることを特徴
とする上記（１）記載の微細懸濁物含有水の処理方法。 （３）該無機凝集剤が、鉄またはアルミニウム系の無機
凝集剤であることを特徴とする上記（１）または（２）
記載の微細懸濁物含有水の処理方法。 （４）該高分子凝集剤が、ノニオン性またはアニオン性
高分子凝集剤であることを特徴とする上記（１）〜
（３）のいずれかに記載の微細懸濁物含有水の処理方
法。The above object can be achieved by the following means. (1) A method for treating fine suspension-containing water, comprising adding a condensation-type polyamine and an inorganic flocculant to the fine suspension-containing water, and then adding a polymer flocculant. (2) The method for treating fine suspension-containing water according to the above (1), wherein the fine suspension-containing water is papermaking wastewater. (3) The above (1) or (2), wherein the inorganic coagulant is an iron or aluminum-based inorganic coagulant.
A method for treating fine suspension-containing water as described in the above. (4) The above-mentioned (1) to (1), wherein the polymer flocculant is a nonionic or anionic polymer flocculant.
The method for treating water containing fine suspension according to any one of (3).
【０００５】[0005]
【発明の実施の形態】以下、実施の形態を説明するが、
本発明はこれに限定されない。本発明では、微細懸濁物
の含有水に縮合系ポリアミンを添加する。縮合系ポリア
ミンを添加する微細懸濁物の含有水とは、具体的には例
えば製紙廃水を挙げることができる。微細懸濁物の含有
水に添加する縮合系ポリアミンとしては、アルキレンジ
クロライドとアルキレンポリアミンとの縮合物、アニリ
ンとホルマリンの縮合物、アルキレンジアミンとエピク
ロルヒドリンとの縮合物、アンモニアとエピクロルヒド
リンとの縮合物などが挙げられる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below.
The present invention is not limited to this. In the present invention, a condensed polyamine is added to the water contained in the fine suspension. Specific examples of the water contained in the fine suspension to which the condensed polyamine is added include papermaking wastewater. Examples of the condensed polyamine to be added to the water containing the fine suspension include a condensate of an alkylene dichloride and an alkylene polyamine, a condensate of aniline and formalin, a condensate of an alkylene diamine and epichlorohydrin, a condensate of ammonia and epichlorohydrin, and the like. Is mentioned.
【０００６】エピクロルヒドリンと縮合するアルキレン
ジアミンとしては、ジメチルアミン、ジエチルアミン、
メチルプロピルアミン、メチルブチルアミン、ジブチル
アミンなどが挙げられる。縮合系ポリアミンとともに微
細懸濁物の含有水に添加する無機凝集剤としては、一般
にも凝集剤として既に使用されている鉄系またはアルミ
ニウム系無機凝集剤が使用できる。そのような鉄系また
はアルミニウム系無機凝集剤としては、具体的には、硫
酸バンド、ポリ塩化アルミニウム（ＰＡＣ）、塩化アル
ミニウム、ポリ硫酸第二鉄（ポリ鉄）、塩化第二鉄およ
びこれらの混合物が挙げられる。縮合系ポリアミンと無
機凝集剤の使用割合は、縮合系ポリアミンに対して無機
凝集剤の量を０．５〜５重量比の範囲になるようにす
る。The alkylenediamine condensed with epichlorohydrin includes dimethylamine, diethylamine,
Methylpropylamine, methylbutylamine, dibutylamine and the like can be mentioned. As the inorganic coagulant to be added to the water contained in the fine suspension together with the condensed polyamine, an iron-based or aluminum-based inorganic coagulant which has already been generally used as a coagulant can be used. Specific examples of such an iron-based or aluminum-based inorganic coagulant include a sulfate band, polyaluminum chloride (PAC), aluminum chloride, ferric polysulfate (polyiron), ferric chloride, and a mixture thereof. Is mentioned. The ratio of the condensed polyamine to the inorganic coagulant is adjusted so that the amount of the inorganic coagulant is 0.5 to 5 weight ratio based on the condensed polyamine.
【０００７】上記の縮合系ポリアミンと無機凝集剤は、
使用に際して混合物の形態で添加してもよいが、そうし
た混合物をあらかじめ水で希釈した水溶液の状態で使用
してもよい。また、縮合系ポリアミンと無機凝集剤を別
々に、排水に対してほぼ同時に添加してもよい。ただ
し、混合物の状態で使用した方が、処理設備が簡易で作
業負担も軽減できるので好ましい。縮合系ポリアミンと
無機凝集剤の汚泥に対する添加量は、通常、一般の脱水
の場合と同様の範囲、すなわち両者の合計量で１０〜１
００ｐｐｍの範囲（製品換算）でよい。縮合系ポリアミ
ンと無機凝集剤の汚泥に対する添加方法は、投入後、最
初は急速に撹拌し、次いでゆっくり撹拌するとよい。The above-mentioned condensed polyamine and inorganic coagulant are
When used, it may be added in the form of a mixture, but such a mixture may be used in the form of an aqueous solution diluted with water in advance. Further, the condensed polyamine and the inorganic coagulant may be separately added almost simultaneously to waste water. However, it is preferable to use the mixture in the state of a mixture because the processing equipment is simple and the work load can be reduced. The addition amount of the condensed polyamine and the inorganic flocculant to the sludge is usually in the same range as in the case of general dehydration, that is, 10 to 1 in total of both.
It may be in the range of 00 ppm (product conversion). As for the method of adding the condensed polyamine and the inorganic flocculant to the sludge, it is preferable that, after the addition, the mixture be stirred rapidly at first, and then slowly stirred.
【０００８】縮合系ポリアミンと無機凝集剤を添加後、
高分子凝集剤を添加する。添加する高分子凝集剤として
は公知のノニオン性、アニオン性、カチオン性高分子凝
集剤を挙げることができる。例えば、ポリアクリルアミ
ド、ポリアクリルアミド部分加水分解物、アクリルアミ
ド・アクリル酸塩共重合物、アクリルアミド・アクリル
アミド−２−メチルプロパンスルホン酸塩共重合物、ポ
リアクリルアミドマンニッヒ変性物、アクリルアミド
（メタ）アクリロイロキシエチルトリメチルアンモニウ
ムクロライド共重合物などを挙げることができる。中で
もポリアクリルアミド、ポリアクリルアミド部分加水分
解物、アクリルアミド・アクリル酸塩共重合物、アクリ
ルアミド・アクリルアミド−２−メチルプロパンスルホ
ン酸塩共重合物のようなノニオン性またはアニオン性高
分子凝集剤が好ましい。After the addition of the condensed polyamine and the inorganic coagulant,
A polymeric flocculant is added. Examples of the polymer flocculant to be added include known nonionic, anionic, and cationic polymer flocculants. For example, polyacrylamide, partially hydrolyzed polyacrylamide, acrylamide / acrylate copolymer, acrylamide / acrylamide-2-methylpropanesulfonate copolymer, modified polyacrylamide Mannich, acrylamide (meth) acryloyloxyethyl Trimethylammonium chloride copolymer and the like can be mentioned. Among them, nonionic or anionic polymer coagulants such as polyacrylamide, polyacrylamide partial hydrolyzate, acrylamide / acrylate copolymer, and acrylamide / acrylamide-2-methylpropanesulfonate copolymer are preferable.
【０００９】このような高分子凝集剤を、微細懸濁物の
含有水に添加する量は、通常０．１〜１０ｐｐｍ、好ま
しくは０．５〜５ｐｐｍの範囲が通常好ましい。高分子
凝集剤を添加して凝集すれば、含有水からその凝集物を
分離採取する。凝集物を分離採取する分離操作には公知
の方法を採用できる。例えば沈降タイプまたは加圧浮上
タイプの廃水処理装置を使用するとよい。The amount of such a polymer flocculant to be added to the water contained in the fine suspension is usually 0.1 to 10 ppm, preferably 0.5 to 5 ppm. If a polymer coagulant is added to cause coagulation, the coagulated material is separated and collected from the contained water. A known method can be used for the separation operation for separating and collecting the aggregates. For example, a sedimentation type or pressure floating type wastewater treatment apparatus may be used.
【００１０】[0010]
【実施例】以下、実施例により、本発明を更に具体的に
説明する。実施例は下記の手法に従って行った。原水を
５００ミリリットルビーカーに入れ、縮合系ポリアミン
と無機凝集剤の混合物（以下、「混合物」）を所定量添
加し、ジャーテスタを使用して１５０ｒｐｍで一分間撹
拌した。次に、高分子凝集剤を所定量添加し、５０ｒｐ
ｍで５分間撹拌した。撹拌により生じた凝集フロックの
状態、及び撹拌停止５分後の上澄み水の水質を測定し
た。試験に用いた「混合物」の組成は下記第１表に示す
通りである。EXAMPLES The present invention will be described more specifically with reference to the following examples. Examples were performed according to the following methods. Raw water was placed in a 500 ml beaker, a predetermined amount of a mixture of a condensed polyamine and an inorganic coagulant (hereinafter, “mixture”) was added, and the mixture was stirred at 150 rpm for 1 minute using a jar tester. Next, a predetermined amount of a polymer flocculant is added, and 50 rpm
and stirred for 5 minutes. The state of flocculated floc generated by stirring and the quality of supernatant water 5 minutes after stopping stirring were measured. The composition of the “mixture” used in the test is as shown in Table 1 below.
【００１１】[0011]
【表１】 [Table 1]
【００１２】試験に用いた高分子凝集剤は下記の通りで
あり、試験に際しては蒸留水により０．２％に溶解し
た。 「アニオン性高分子凝集剤Ａ」：アクリル酸ソーダ／ア
クリルアミド共重合体（モル比 ９２／８）、分子量１
６００万 「アニオン性高分子凝集剤Ｂ」：アクリル酸ソーダ／ア
クリルアミド共重合体（モル比 ８５／１５）、分子量
１３００万The polymer flocculants used in the test were as follows, and were dissolved in distilled water to 0.2% in the test. "Anionic polymer coagulant A": sodium acrylate / acrylamide copolymer (molar ratio 92/8), molecular weight 1
6 million “anionic polymer flocculant B”: sodium acrylate / acrylamide copolymer (molar ratio 85/15), molecular weight 13 million
【００１３】〔実施例１，２〕、〔比較例１〜４〕 Ａ製紙工場から排出されるｐＨ：６．４７、ＳＳ：１２
６０ｐｐｍ、導電率：１．９２ＭＳ／ｃｍ、透視度１．
０ｃｍの性状を有する廃水を用い、第２表が示す上記の
「混合物」あるいはを添加後、上記の「アニオン性
高分子凝集剤Ａ」を添加して凝集沈殿処理をした。第２
表に示す結果を得た。比較例として第１表の「混合物」
に代えて通常の無機凝集剤あるいは縮合系ポリアミンを
使用して実験を行った。結果を第２表に併記する。[Examples 1 and 2], [Comparative Examples 1 to 4] pH: 6.47, SS: 12 discharged from A paper mill.
60 ppm, conductivity: 1.92 MS / cm, visibility: 1.
Using wastewater having a property of 0 cm, the above-mentioned "mixture" or the mixture shown in Table 2 was added, and then the above-mentioned "anionic polymer flocculant A" was added to carry out flocculation-precipitation treatment. Second
The results shown in the table were obtained. "Compound" in Table 1 as a comparative example
The experiment was carried out using an ordinary inorganic coagulant or a condensed polyamine in place of the above. The results are shown in Table 2.
【００１４】[0014]
【表２】 [Table 2]
【００１５】〔実施例３〜７〕、〔比較例５〜８〕 Ｂ製紙工場から排出されるｐＨ：７．００、ＳＳ：２９
２０ｐｐｍ、導電率：２．７０ｍＳ／ｃｍ、透視度０．
５ｃｍの性状を有する廃水を用いて第３表が示す上記の
混合物あるいは高分子凝集剤を使用した以外は実施例１
と同様に試験を行った。結果を第３表に記載する。[Examples 3 to 7], [Comparative Examples 5 to 8] pH: 7.00, SS: 29 discharged from the paper mill B
20 ppm, conductivity: 2.70 mS / cm, transparency: 0.
Example 1 except that the above mixture or polymer flocculant shown in Table 3 was used using wastewater having a property of 5 cm.
The test was performed in the same manner as in the above. The results are shown in Table 3.
【００１６】[0016]
【表３】 [Table 3]
【００１７】〔比較例９〕混合物と高分子凝集剤の添加
順序を変えた以外は、実施例１と同様に試験を行った。
結果を第４表に記載する。Comparative Example 9 A test was performed in the same manner as in Example 1 except that the order of adding the mixture and the polymer flocculant was changed.
The results are shown in Table 4.
【００１８】[0018]
【表４】 [Table 4]
【００１９】上記の実施例の結果から、微細懸濁物含有
水に縮合系ポリアミンと無機凝集剤の混合物を用いた場
合、凝集性に優れ、色調や透視度に優れた処理水が得ら
れることが分かる。一方、混合物と高分子凝集剤の添加
順序を変えた場合では、凝集性、色調、透視度のいずれ
も劣っていた。また、実施例１において、高分子凝集剤
Ａを使用せずに同様の試験を行ったところ、凝集フロッ
クの沈降が極めて遅く、上澄水の水質測定ができなかっ
た。From the results of the above examples, it can be seen that when a mixture of a condensed polyamine and an inorganic coagulant is used in water containing a fine suspension, treated water having excellent coagulability and excellent color tone and transparency can be obtained. I understand. On the other hand, when the order of adding the mixture and the polymer coagulant was changed, all of the cohesiveness, color tone, and transparency were inferior. In Example 1, when the same test was performed without using the polymer flocculant A, sedimentation of flocculated floc was extremely slow, and the water quality of the supernatant water could not be measured.
【００２０】[0020]
【発明の効果】本発明によれば、微細懸濁物含有水に対
し、縮合系ポリアミンと無機凝集剤を添加した後、高分
子凝集剤を添加するから、懸濁物質を短時間に効率よく
凝集沈殿できる微細懸濁物の処理方法を提供することが
できる。無機凝集剤と有機高分子凝集剤の併用する従来
の処理方法に比べ、凝集物を良好に沈降させることがで
き、かつ強固なフロックが形成される。処理水へのキャ
リーオーバーが防止され、かつ上質な処理水を得ること
ができるので、工業上優れた効果を奏する。According to the present invention, the condensed polyamine and the inorganic coagulant are added to the water containing the fine suspension, and then the polymer coagulant is added. A method for treating a fine suspension capable of coagulating and sedimentation can be provided. Aggregates can be favorably settled and a strong floc is formed, as compared with the conventional treatment method using an inorganic coagulant and an organic polymer coagulant in combination. Carry-over to the treated water is prevented, and high-quality treated water can be obtained.
Claims (4)
ミンと無機凝集剤を添加した後、高分子凝集剤を添加す
ることを特徴とする微細懸濁物含有水の処理方法。1. A method for treating fine suspension-containing water, comprising adding a condensation-type polyamine and an inorganic flocculant to the fine suspension-containing water, and then adding a polymer flocculant.
とを特徴とする請求項１記載の微細懸濁物含有水の処理
方法。2. The method for treating fine suspension-containing water according to claim 1, wherein the fine suspension-containing water is papermaking wastewater.
系の無機凝集剤であることを特徴とする請求項１または
２記載の微細懸濁物含有水の処理方法。3. The method according to claim 1, wherein the inorganic coagulant is an iron or aluminum-based inorganic coagulant.
ニオン性高分子凝集剤であることを特徴とする請求項１
〜３いずれかに記載の微細懸濁物含有水の処理方法。4. The polymer flocculant according to claim 1, wherein the polymer flocculant is a nonionic or anionic polymer flocculant.
The method for treating fine suspension-containing water according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21206897A JPH1147758A (en) | 1997-08-06 | 1997-08-06 | Treatment of water containing minute suspended substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21206897A JPH1147758A (en) | 1997-08-06 | 1997-08-06 | Treatment of water containing minute suspended substance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1147758A true JPH1147758A (en) | 1999-02-23 |
Family
ID=16616342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21206897A Pending JPH1147758A (en) | 1997-08-06 | 1997-08-06 | Treatment of water containing minute suspended substance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1147758A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005110931A1 (en) * | 2004-05-13 | 2005-11-24 | Hansu Ltd. | Method for removing suspension contained in cooling water for spray used in iron works |
| JP2008055357A (en) * | 2006-08-31 | 2008-03-13 | Daio Paper Corp | Wastewater treatment method |
| JP2011131167A (en) * | 2009-12-24 | 2011-07-07 | Daiyanitorikkusu Kk | Flocculation treatment method of waste water |
| CN110621258A (en) * | 2017-03-20 | 2019-12-27 | 斯特劳曼控股公司 | Two-piece modeling aid |
| US10982391B2 (en) | 2016-06-01 | 2021-04-20 | Ecolab Usa Inc. | High-efficiency strength program used for making paper in higher charge demand system |
| US12584273B2 (en) | 2021-08-31 | 2026-03-24 | Ecolab Usa Inc. | Composition and method for papermaking |
-
1997
- 1997-08-06 JP JP21206897A patent/JPH1147758A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005110931A1 (en) * | 2004-05-13 | 2005-11-24 | Hansu Ltd. | Method for removing suspension contained in cooling water for spray used in iron works |
| JP2008055357A (en) * | 2006-08-31 | 2008-03-13 | Daio Paper Corp | Wastewater treatment method |
| JP2011131167A (en) * | 2009-12-24 | 2011-07-07 | Daiyanitorikkusu Kk | Flocculation treatment method of waste water |
| US10982391B2 (en) | 2016-06-01 | 2021-04-20 | Ecolab Usa Inc. | High-efficiency strength program used for making paper in higher charge demand system |
| CN110621258A (en) * | 2017-03-20 | 2019-12-27 | 斯特劳曼控股公司 | Two-piece modeling aid |
| CN110621258B (en) * | 2017-03-20 | 2022-01-07 | 斯特劳曼控股公司 | Two-piece modeling aid |
| US12584273B2 (en) | 2021-08-31 | 2026-03-24 | Ecolab Usa Inc. | Composition and method for papermaking |
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