JP2001269504A - Novel flocculant and method for manufacturing the same - Google Patents
Novel flocculant and method for manufacturing the sameInfo
- Publication number
- JP2001269504A JP2001269504A JP2000088690A JP2000088690A JP2001269504A JP 2001269504 A JP2001269504 A JP 2001269504A JP 2000088690 A JP2000088690 A JP 2000088690A JP 2000088690 A JP2000088690 A JP 2000088690A JP 2001269504 A JP2001269504 A JP 2001269504A
- Authority
- JP
- Japan
- Prior art keywords
- aqueous solution
- coagulant
- flocculant
- present
- ferric polysulfate
- 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.)
- Granted
Links
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、新規の凝集剤及び
その製造方法に関する。TECHNICAL FIELD The present invention relates to a novel flocculant and a method for producing the same.
【０００２】[0002]
【従来の技術】ポリ硫酸第二鉄水溶液は、鉄系の無機高
分子凝集剤であり、例えば、凝集、脱リン、及び脱臭等
に効果があることが知られている。2. Description of the Related Art An aqueous ferric polysulfate solution is an iron-based inorganic polymer coagulant, and is known to be effective in coagulation, dephosphorization, deodorization, and the like.
【０００３】[0003]
【発明が解決しようとする課題】前記ポリ硫酸第二鉄水
溶液は、強酸性の凝集剤であるため、被処理液（例え
ば、産業排水又は染色排水）へ大量に添加する必要があ
る場合には、中和剤（例えば、苛性ソーダ又は消石灰）
が必要となる欠点がある。更に、中和剤を添加すると、
スラッジの発生量が多くなり、汚泥処分費の増大等の弊
害がある。Since the aqueous solution of ferric polysulfate is a strongly acidic coagulant, it must be added to a liquid to be treated (for example, industrial wastewater or dyeing wastewater) in a large amount. , Neutralizing agents (eg, caustic soda or slaked lime)
Is required. Furthermore, when a neutralizing agent is added,
The amount of sludge generated is large, and there are adverse effects such as an increase in sludge disposal costs.
【０００４】ポリ硫酸第二鉄水溶液のこれらの欠点は、
充分な凝集効果を得るために、ポリ硫酸第二鉄水溶液を
被処理液に大量に添加することに起因するものである。
本発明者は、ポリ硫酸第二鉄水溶液の凝集能を更に向上
させることを目的として鋭意探求したところ、ポリ硫酸
第二鉄水溶液とポリアミン系有機高分子凝集剤とを含有
する凝集剤では、ポリ硫酸第二鉄水溶液単独の凝集効果
とポリアミン系有機高分子凝集剤単独の凝集効果との単
なる相加効果に比べ、遥かに高い相乗効果を示すことを
見出した。本発明はこのような知見に基づくものであ
り、従って、本発明の課題は、ポリ硫酸第二鉄水溶液よ
りも凝集効果の高い新規凝集剤及びその製造方法を提供
することにある。[0004] These disadvantages of aqueous ferric polysulfate solutions are:
This is because a large amount of an aqueous solution of ferric polysulfate is added to the liquid to be treated in order to obtain a sufficient coagulation effect.
The inventor of the present invention has enthusiastically searched for the purpose of further improving the aggregating ability of the aqueous ferric polysulfate solution. It has been found that a much higher synergistic effect is exhibited as compared to the mere additive effect of the flocculating effect of the aqueous ferric sulfate solution alone and the flocculating effect of the polyamine organic polymer flocculant alone. The present invention is based on such findings, and accordingly, an object of the present invention is to provide a novel flocculant having a higher flocculating effect than an aqueous ferric polysulfate solution and a method for producing the same.
【０００５】[0005]
【課題を解決するための手段】前記課題は、本発明によ
る、ポリ硫酸第二鉄とポリアミン系有機高分子凝集剤と
を含有することを特徴とする、凝集剤により解決するこ
とができる。また、本発明は、ポリ硫酸第二鉄水溶液の
撹拌下に、ポリアミン系有機高分子凝集剤水溶液を徐々
に添加することを特徴とする、前記凝集剤の製造方法に
関する。The above object can be attained by a flocculant according to the present invention, which comprises ferric polysulfate and a polyamine organic polymer flocculant. The present invention also relates to a method for producing the flocculant, characterized by gradually adding an aqueous solution of a polyamine organic polymer flocculant while stirring the aqueous ferric polysulfate solution.
【０００６】[0006]
【発明の実施の形態】本発明の凝集剤又はその製造方法
で使用するポリ硫酸第二鉄は、式： ［Ｆｅ2（ＯＨ）n（ＳＯ4）3-n/2］m （式中、ｎは２より小さい数であり、ｍは１０より大き
い数である）で表される化合物であり、その塩基度は、
式： （ｎ／６）×１００％ で示される（特公昭５１−１７５１６号公報参照）。BEST MODE FOR CARRYING OUT THE INVENTION The ferric polysulfate used in the coagulant of the present invention or the method for producing the same has a formula: [Fe 2 (OH) n (SO 4 ) 3-n / 2 ] m , wherein n is a number less than 2 and m is a number greater than 10).
Formula: It is represented by (n / 6) × 100% (see Japanese Patent Publication No. 51-17516).
【０００７】本発明の凝集剤水溶液において、前記ポリ
硫酸第二鉄は、鉄イオンとして好ましくは５０〜２００
ｇ／Ｌ、より好ましくは１００〜１８０ｇ／Ｌの量で含
まれることができる。In the flocculant aqueous solution of the present invention, the ferric polysulfate is preferably 50 to 200 as iron ions.
g / L, more preferably 100-180 g / L.
【０００８】本発明の凝集剤又はその製造方法で使用す
るポリアミン系有機高分子凝集剤としては、従来公知の
ポリアミン系有機高分子凝集剤を使用することができ、
例えば、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との縮合物、アル
キレンジアミン（例えば、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、例
えば、ジブチルアミン）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、又は
アクリロニトリル若しくはメタクリロニトリルの重合体
とポリアミン（例えば、エチレンジアミン、１，２−ジ
アミノプロパン、１，３−ジアミノプロパン、１，２−
ジアミノブタン、２，３−ジアミノブタン、若しくは
１，３−ジアミノブタン、又はそれらのＮ−アルキル置
換体）との縮合物を挙げることができ、ポリアミン系カ
チオン性高分子凝集剤を用いることが好ましく、ダイヤ
フロック社から市販されているポリアミン系カチオン凝
集剤Ｋ−４０１を用いることが特に好ましい。As the coagulant of the present invention or the polyamine organic polymer coagulant used in the method for producing the coagulant, conventionally known polyamine organic polymer coagulants can be used.
For example, a condensate of alkylene dichloride and alkylene polyamine, a condensate of aniline and formalin, a condensate of alkylene diamine (for example, dimethylamine, diethylamine, methylpropylamine, methylbutylamine, for example, dibutylamine) and epichlorohydrin, ammonia Of acrylonitrile or methacrylonitrile with a polyamine (eg, ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,2-
Diaminobutane, 2,3-diaminobutane, or 1,3-diaminobutane, or an N-alkyl-substituted product thereof), and it is preferable to use a polyamine-based cationic polymer flocculant. It is particularly preferable to use a polyamine-based cationic coagulant K-401 commercially available from Diafloc.
【０００９】本発明の凝集剤におけるポリ硫酸第二鉄と
ポリアミン系有機高分子凝集剤との配合比は、これに限
定されるものではないが、鉄イオン１重量部に対して、
ポリアミン系有機高分子凝集剤０．０１〜１０重量部で
あることが好ましい。鉄イオン１重量部に対してポリア
ミン系有機高分子凝集剤１０重量部を越えると、凝集剤
としての安定性が悪くなることがある。また、鉄イオン
１重量部に対してポリアミン系有機高分子凝集剤０．０
１重量部未満であると、満足する相乗効果が得られない
ことがある。製造コストを考慮すると、鉄イオン１重量
部に対して、ポリアミン系有機高分子凝集剤０．０１〜
１重量部であることがより好ましい。The mixing ratio of the ferric polysulfate to the polyamine-based organic polymer coagulant in the coagulant of the present invention is not limited to this.
It is preferable that the amount of the polyamine organic polymer flocculant is 0.01 to 10 parts by weight. If the amount exceeds 10 parts by weight of the polyamine organic polymer flocculant with respect to 1 part by weight of iron ions, the stability as a flocculant may be deteriorated. In addition, a polyamine-based organic polymer flocculant was added in an amount of 0.0
If the amount is less than 1 part by weight, a satisfactory synergistic effect may not be obtained. In consideration of the production cost, the polyamine organic polymer flocculant is used in an amount of 0.01 to 1 part by weight of iron ion.
More preferably, it is 1 part by weight.
【００１０】本発明の凝集剤は、これに限定されるもの
ではないが、例えば、本発明の製造方法により調製する
ことができる。本発明の製造方法では、ポリ硫酸第二鉄
水溶液の撹拌下に、ポリアミン系有機高分子凝集剤水溶
液を徐々に添加する。例えば、ポリ硫酸第二鉄水溶液
に、ポリアミン系有機高分子凝集剤水溶液を一度に大量
に添加したり、逆に、ポリアミン系有機高分子凝集剤水
溶液に、ポリ硫酸第二鉄水溶液を添加したりすると、ポ
リ硫酸第二鉄中の鉄イオンの加水分解が生じ、その結
果、得られる凝集剤の凝集力が低下することがある。従
って、本明細書において「ポリ硫酸第二鉄水溶液の撹拌
下に、ポリアミン系有機高分子凝集剤水溶液を徐々に添
加する」とは、ポリ硫酸第二鉄水溶液を撹拌しながら、
ポリ硫酸第二鉄水溶液中で鉄イオンが加水分解を生じな
い程度に、ポリアミン系有機高分子凝集剤水溶液を連続
的又は断続的に少量ずつ添加することを意味する。The flocculant of the present invention is not limited to this, but can be prepared, for example, by the production method of the present invention. In the production method of the present invention, an aqueous solution of a polyamine organic polymer flocculant is gradually added while stirring the aqueous solution of ferric polysulfate. For example, a large amount of a polyamine organic polymer flocculant aqueous solution is added to a ferric polysulfate aqueous solution at a time, or conversely, a ferric polysulfate aqueous solution is added to a polyamine organic polymer flocculant aqueous solution. Then, hydrolysis of iron ions in the ferric polysulfate occurs, and as a result, the cohesive force of the obtained coagulant may decrease. Therefore, in the present specification, "while stirring the aqueous solution of polyamine organic polymer flocculant gradually while stirring the aqueous solution of ferric polysulfate", while stirring the aqueous solution of ferric polysulfate,
This means that the aqueous solution of the polyamine organic polymer flocculant is continuously or intermittently added little by little to the extent that iron ions do not undergo hydrolysis in the aqueous solution of ferric polysulfate.
【００１１】本発明の製造方法におけるポリ硫酸第二鉄
水溶液とポリアミン系有機高分子凝集剤水溶液との混合
比（溶液比）は、特に限定されるものではないが、ポリ
硫酸第二鉄水溶液に含まれる鉄イオン１重量部に対し
て、ポリアミン系有機高分子凝集剤水溶液に含まれるポ
リアミン系有機高分子凝集剤が０．０１〜１０重量部と
なるように、前記ポリ硫酸第二鉄水溶液と前記ポリアミ
ン系有機高分子凝集剤水溶液とを混合することが好まし
い。このような混合比（溶液比）で本発明の製造方法を
実施すると、鉄イオン１重量部に対して、ポリアミン系
有機高分子凝集剤０．０１〜１０重量部である本発明の
凝集剤を得ることができる。The mixing ratio (solution ratio) between the aqueous solution of ferric polysulfate and the aqueous solution of a polyamine organic polymer flocculant in the production method of the present invention is not particularly limited. The ferric polysulfate aqueous solution is mixed with the polyamine organic polymer flocculant aqueous solution so that the amount of the polyamine organic polymer flocculant contained in the aqueous polyamine organic polymer flocculant solution is 0.01 to 10 parts by weight with respect to 1 part by weight of the contained iron ions. It is preferable to mix with the polyamine organic polymer flocculant aqueous solution. When the production method of the present invention is carried out at such a mixing ratio (solution ratio), the coagulant of the present invention, which is 0.01 to 10 parts by weight of the polyamine organic polymer coagulant, is added to 1 part by weight of iron ions. Obtainable.
【００１２】本発明の製造方法において、ポリ硫酸第二
鉄水溶液として、ポリ硫酸第二鉄水溶液（鉄イオン濃度
＝１６０ｇ／Ｌ）を使用し、ポリアミン系有機高分子凝
集剤水溶液として、ポリアミン系カチオン凝集剤Ｋ−４
０１（ダイヤフロック社）の水溶液を使用する場合に
は、前記ポリ硫酸第二鉄水溶液と前記ポリアミン系有機
高分子凝集剤水溶液との混合比（溶液比）は、これに限
定されるものではないが、１０００：１〜１：１である
ことが好ましい。混合比が１：１を越えると、得られる
凝集剤の安定性が悪くなることがある。また、混合比が
１０００：１未満であると、満足する相乗効果が得られ
ないことがある。製造コストを考慮すると、前記ポリ硫
酸第二鉄水溶液と前記ポリアミン系有機高分子凝集剤水
溶液との混合比は、これに限定されるものではないが、
１０００：１〜１００：１であることがより好ましい。In the production method of the present invention, an aqueous solution of ferric polysulfate (iron ion concentration = 160 g / L) is used as an aqueous solution of ferric polysulfate, and a polyamine-based cation is used as an aqueous solution of a polyamine-based organic polymer flocculant. Coagulant K-4
When an aqueous solution of No. 01 (Diafloc) is used, the mixing ratio (solution ratio) of the aqueous solution of ferric polysulfate and the aqueous solution of the polyamine organic polymer flocculant is not limited to this. Is preferably 1000: 1 to 1: 1. When the mixing ratio exceeds 1: 1, the stability of the obtained flocculant may deteriorate. If the mixing ratio is less than 1000: 1, a satisfactory synergistic effect may not be obtained. In consideration of the production cost, the mixing ratio of the aqueous solution of ferric polysulfate and the aqueous solution of the polyamine-based organic polymer flocculant is not limited to this,
More preferably, it is 1000: 1 to 100: 1.
【００１３】本発明の製造方法においては、ポリ硫酸第
二鉄水溶液へのポリアミン系有機高分子凝集剤水溶液の
添加を、ポリ硫酸第二鉄水溶液のｐＨが１以下になるよ
うに調整しながら実施することが好ましく、前記添加の
開始から完了までの全期間に亘って、ポリ硫酸第二鉄水
溶液のｐＨが１以下の条件下で実施することがより好ま
しい。ポリ硫酸第二鉄水溶液（すなわち、ポリアミン系
有機高分子凝集剤水溶液を添加する前のポリ硫酸第二鉄
水溶液）のｐＨは、通常、０．５〜１であり、ポリアミ
ン系有機高分子凝集剤水溶液のｐＨは、通常、１より高
いので、ポリ硫酸第二鉄水溶液にポリアミン系有機高分
子凝集剤水溶液を徐々に添加すると、そのｐＨは、通
常、大きくなる。従って、例えば、ｐＨを測定し、その
測定値に応じて、あるいは、予備実験により予め予想さ
れるｐＨ上昇に応じて、適当量の酸［例えば、無機酸
（例えば、塩酸又は硫酸）又は有機酸（例えば、酢
酸）］を適宜添加することにより、ｐＨを１以下に維持
することが好ましい。In the production method of the present invention, the aqueous solution of a polyamine-based organic polymer flocculant is added to the aqueous solution of ferric polysulfate while adjusting the pH of the aqueous solution of ferric polysulfate to 1 or less. It is more preferable that the pH of the aqueous solution of ferric polysulfate is 1 or less over the entire period from the start to the completion of the addition. The pH of the aqueous solution of ferric polysulfate (that is, the aqueous solution of ferric polysulfate before adding the aqueous solution of polyamine organic polymer flocculant) is usually 0.5 to 1, and the pH of the polyamine organic polymer flocculant is usually 0.5 to 1. Since the pH of the aqueous solution is usually higher than 1, when the aqueous solution of the polyamine organic polymer flocculant is gradually added to the aqueous solution of ferric polysulfate, the pH usually increases. Thus, for example, a suitable amount of an acid [eg, an inorganic acid (eg, hydrochloric acid or sulfuric acid) or an organic acid, depending on the measured pH or the pH increase expected in preliminary experiments, is measured. (For example, acetic acid)], the pH is preferably maintained at 1 or less.
【００１４】本発明の製造方法は、常温及び常圧下で実
施することができるが、必要により加温又は冷却下で実
施することもできる。The production method of the present invention can be carried out at normal temperature and normal pressure, but can also be carried out under heating or cooling if necessary.
【００１５】本発明の凝集剤を用いて処理することので
きる被処理液としては、これに限定されるものではない
が、従来公知の凝集剤と同様の適用対象、例えば、産業
排水又は染色排水を挙げることができる。The liquid to be treated which can be treated with the coagulant of the present invention is not limited to this, but may be the same as a conventionally known coagulant, for example, industrial wastewater or dyed wastewater. Can be mentioned.
【００１６】本発明の凝集剤の使用方法に関しても、従
来公知の凝集剤と同様にして使用することができ、例え
ば、被処理液に、好ましくは撹拌下、本発明の凝集剤を
添加することにより、被処理液の凝集処理を実施するこ
とができる。本発明の凝集剤の添加量は、適用対象であ
る被処理液の種類及び状態に応じて適宜決定することが
でき、例えば、通常の産業排水であれば、５０〜５００
０ｐｐｍの濃度で使用することができる。The method of using the coagulant of the present invention can be used in the same manner as a conventionally known coagulant. For example, adding the coagulant of the present invention to a liquid to be treated, preferably with stirring. Thereby, the aggregation treatment of the liquid to be treated can be performed. The addition amount of the coagulant of the present invention can be appropriately determined according to the type and state of the liquid to be treated, which is an application target.
It can be used at a concentration of 0 ppm.
【００１７】[0017]
【実施例】以下、実施例によって本発明を具体的に説明
するが、これらは本発明の範囲を限定するものではな
い。EXAMPLES The present invention will be described below in more detail with reference to examples, but these examples do not limit the scope of the present invention.
【調製実施例１】１Ｌ容量のビーカーにポリ硫酸第二鉄
水溶液（鉄イオン濃度＝１６０ｇ／Ｌ）１Ｌを入れた
後、撹拌下、ポリアミン系カチオン凝集剤Ｋ−４０１水
溶液（ダイヤフロック社）１０ｍＬを徐々に添加するこ
とにより、本発明の凝集剤１．０１Ｌを調製した。Preparation Example 1 1 L of an aqueous solution of ferric polysulfate (iron ion concentration = 160 g / L) was placed in a 1 L beaker, and then 10 mL of an aqueous solution of a polyamine-based cationic coagulant K-401 (Diafloc) was stirred. Was slowly added to prepare 1.01 L of a flocculant of the present invention.
【００１８】[0018]
【評価例１】被処理液として、染色排水［色度＝８９０
度，化学的酸素要求量（ＣＯＤ）＝１５５ｍｇ／Ｌ］を
用いて、前記調製実施例１で調製した本発明の凝集剤の
評価を実施した。なお、評価は、色度、ＣＯＤ、及び肉
眼による凝集性評価により実施し、各評価試験は後述の
各項目（１）〜（３）に示す方法により実施した。[Evaluation Example 1] Dyeing wastewater [chromaticity = 890]
And the chemical oxygen demand (COD) = 155 mg / L], the coagulant of the present invention prepared in Preparation Example 1 was evaluated. In addition, evaluation was implemented by chromaticity, COD, and aggregation evaluation by the naked eye, and each evaluation test was implemented by the method shown in each item (1) to (3) described later.
【００１９】１０００ｍＬ容量のビーカー２個に、それ
ぞれ、被処理液である染色排水１０００ｍＬを入れた
後、前記調製実施例１で調製した本発明の凝集剤を、５
００ｐｐｍ又は８００ｐｐｍの濃度になるように、撹拌
しながら添加した。本発明の凝集剤を添加した直後のｐ
Ｈをそれぞれ測定し、８００ｐｐｍの濃度で本発明の凝
集剤を添加したビーカーにのみ、０．５ｍｏｌ／Ｌ水酸
化ナトリウム水溶液０．２５ｍＬを添加した後、再度、
ｐＨを測定した。５分間静置した後、上清を採取し、以
下に示す各項目（１）又は（２）に示す方法により、各
上清の色度及びＣＯＤを測定した。また、以下に示す項
目（３）に示す手順に従って、肉眼による凝集性評価も
行なった。なお、比較のために、本発明の凝集剤の代わ
りに、従来公知の凝集剤であるポリ硫酸第二鉄水溶液
（鉄イオン濃度＝１６０ｇ／Ｌ）を用いたこと以外は、
前記操作を繰り返した。また、対照（コントロール）と
して、本発明の凝集剤を添加しなかったこと以外は、前
記操作を繰り返した。Into two 1000 mL beakers, 1000 mL of the dyeing wastewater, which is the liquid to be treated, was added, and the coagulant of the present invention prepared in Preparation Example 1 was added to 5 beakers.
It was added with stirring to a concentration of 00 ppm or 800 ppm. P immediately after adding the flocculant of the present invention
H was measured, and only 0.25 mL of a 0.5 mol / L aqueous sodium hydroxide solution was added to only the beaker to which the coagulant of the present invention was added at a concentration of 800 ppm.
The pH was measured. After standing for 5 minutes, the supernatant was collected, and the chromaticity and COD of each supernatant were measured by the method shown in each item (1) or (2) shown below. In addition, according to the procedure shown in the following item (3), the cohesiveness was evaluated with the naked eye. For comparison, a ferric polysulfate aqueous solution (iron ion concentration = 160 g / L), which is a conventionally known flocculant, was used instead of the flocculant of the present invention.
The above operation was repeated. Further, as a control, the above operation was repeated except that the coagulant of the present invention was not added.
【００２０】（１）色度 色度は、工業用水試験方法（ＪＩＳ Ｋ ０１０１
-1991）の項目１０．１に記載の「色度による方法（白
金コバルト法）」に基づいて測定した。(1) Chromaticity The chromaticity is measured by the industrial water test method (JIS K0101).
-1991 ), "method by chromaticity (platinum cobalt method)" described in item 10.1).
【００２１】（２）ＣＯＤ ＣＯＤは、工場排水試験方法（ＪＩＳ Ｋ ０１０２
-1998）の項目１７「１００℃における過マンガン酸カ
リウムによる酸素消費量」に記載の方法に基づいて測定
した。(2) COD COD is a method for testing factory drainage (JIS K0102).
-1998 ), item 17 “Oxygen consumption by potassium permanganate at 100 ° C.”.
【００２２】（３）肉眼による凝集性評価 ５分間静置した際の「凝集物の沈降状態」と、５分間静
置した直後の「上清の状態」とを、以下に示す３段階で
評価し、肉眼による凝集性評価とした。すなわち、評価
「＋＋」は、沈降分離が速やかに進行（静置開始から１
分以内に沈降分離が完了）し、しかも、上清の状態が透
明であることを示す。また、評価「＋」は、沈降分離が
中程度の速さで進行（静置開始から１分を越え、２分以
内に沈降分離が完了）し、しかも、上清に若干濁りがあ
ることを示す。更に、評価「−」は、５分間の静置の間
に沈降分離が完了するものの、沈降分離の完了が遅い
（静置開始から２分を越え、５分以内に沈降分離が完
了）し、しかも、上清に濁りがあることを示す。(3) Evaluation of aggregability by the naked eye The “sedimentation state of aggregates” when allowed to stand for 5 minutes and the “state of supernatant” immediately after allowed to stand for 5 minutes were evaluated in the following three grades. Then, the cohesiveness was visually evaluated. That is, the evaluation “++” indicates that sedimentation and separation proceeded promptly (1
The sedimentation was completed within minutes) and the supernatant was clear. The evaluation “+” indicates that sedimentation separation proceeds at a medium speed (more than 1 minute from the start of standing and sedimentation separation is completed within 2 minutes), and that the supernatant is slightly turbid. Show. Further, the evaluation "-" indicates that although sedimentation separation was completed during the 5-minute standing, the completion of the sedimentation separation was slow (more than 2 minutes from the start of the standing and the sedimentation was completed within 5 minutes), Moreover, it indicates that the supernatant is turbid.
【００２３】本発明の凝集剤を用いて染色排水を処理し
た場合の処理条件を、従来公知の凝集剤を用いた場合の
処理条件及びコントロールの処理条件と併せて、表１に
示す。また、本発明の凝集剤を用いて染色排水を処理し
た場合の結果を、従来公知の凝集剤を用いた場合の結果
及びコントロールの結果と併せて、表２に示す。表１及
び表２において、記号「（−）」は、該当する数値又は
評価がないことを示す。また、表２における「色素によ
る除去率」とは、色度から算出した除去率を意味し、同
様に、「ＣＯＤによる除去率」とは、ＣＯＤから算出し
た除去率を意味する。Table 1 shows the treatment conditions when the dyeing wastewater was treated with the flocculant of the present invention, together with the treatment conditions when a conventionally known flocculant was used and the control conditions. Table 2 shows the results obtained when the dyeing wastewater was treated with the coagulant of the present invention, together with the results obtained when a conventionally known coagulant was used and the results of the control. In Tables 1 and 2, the symbol "(-)" indicates that there is no corresponding numerical value or evaluation. Further, “removal rate by dye” in Table 2 means a removal rate calculated from chromaticity, and similarly, “removal rate by COD” means a removal rate calculated from COD.
【００２４】 《表１》 添加濃度 ｐＨ ＮａＯＨ 鉄イオン K-401 凝集剤 NaOH 添加濃度 (mg/L) (ppm) 添加後 添加後 (ppm) 凝集剤無添加（対照） ０ ０ （−） ７．８ ０ 本発明凝集剤（500ppm添加） ７９ ５ ６．２ ６．２ ０ 本発明凝集剤（800ppm添加） １２７ ８ ５．０ ６．０ ５０ 公知の凝集剤（500ppm添加） ８０ ０ ６．１ ６．１ ０公知の凝集剤（800ppm添加） １２８ ０ ４．８ ６．０ ５５ << Table 1 >> Addition concentration pH NaOH iron ion K-401 coagulant NaOH addition concentration (mg / L) (ppm) After addition After addition (ppm) No coagulant added (control) 00 (-) 80 Coagulant of the present invention (500 ppm added) 79 5 6.2 6.2 0 Coagulant of the present invention (800 ppm added) 127 8 5.0 6.0 50 Known coagulant (500 ppm added) 800 6.16 .10 Known coagulant (800 ppm added) 128 0 4.8 6.0 55
【００２５】《表２》 色度によ ＣＯＤに 凝集性 色度 る除去率 ＣＯＤ よる除去率 評価 （度） （％） (mg/L) （％） 凝集剤無添加（対照） ８９０ （−） １５５ （−） （−） 本発明凝集剤（500ppm添加） １１０ ８８ ８４ ４６ ＋ 本発明凝集剤（800ppm添加） ６５ ９３ ６５ ５８ ＋＋ 公知の凝集剤（500ppm添加） ２４０ ７３ １１０ ２９ −公知の凝集剤（800ppm添加） １２０ ８７ ８８ ４３ ＋ << Table 2 >> COD depending on chromaticity Cohesiveness COD removal rate COD removal rate Evaluation (degree) (%) (mg / L) (%) No coagulant added (control) 890 (-) 155 (−) (−) Coagulant of the present invention (500 ppm added) 110 88 84 46 + Coagulant of the present invention (800 ppm added) 65 93 65 58 ++ Known coagulant (500 ppm added) 240 73 110 29- Known coagulant (800 ppm added) 120 87 88 43 +
【００２６】[0026]
【発明の効果】本発明による凝集剤の凝集効果は、ポリ
硫酸第二鉄水溶液単独に比べ、向上していることから、
本発明の凝集剤によれば、処理水質が向上する。また、
本発明による凝集剤によれば、添加量が少なくて済むこ
とから、中和剤が要らなくなったり、スラッジの発生量
が少なくなる。The coagulant effect of the coagulant according to the present invention is higher than that of the aqueous ferric polysulfate solution alone.
According to the flocculant of the present invention, the quality of treated water is improved. Also,
According to the flocculant of the present invention, since the amount of addition is small, a neutralizing agent is not required, and the amount of generated sludge is reduced.
Claims (3)
子凝集剤とを含有することを特徴とする、凝集剤。1. A coagulant comprising ferric polysulfate and a polyamine organic polymer coagulant.
アミン系有機高分子凝集剤水溶液を徐々に添加すること
を特徴とする、請求項１に記載の凝集剤の製造方法。2. The method for producing a flocculant according to claim 1, wherein an aqueous solution of a polyamine organic polymer flocculant is gradually added while stirring the aqueous solution of ferric polysulfate.
有機高分子凝集剤の添加を、ｐＨ１以下で実施する、請
求項２に記載の製造方法。3. The production method according to claim 2, wherein the addition of the polyamine organic polymer flocculant to the aqueous solution of ferric polysulfate is performed at a pH of 1 or less.
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