JPH09314151A - Water treatment method by flocculation flotation separation - Google Patents
Water treatment method by flocculation flotation separationInfo
- Publication number
- JPH09314151A JPH09314151A JP8140138A JP14013896A JPH09314151A JP H09314151 A JPH09314151 A JP H09314151A JP 8140138 A JP8140138 A JP 8140138A JP 14013896 A JP14013896 A JP 14013896A JP H09314151 A JPH09314151 A JP H09314151A
- Authority
- JP
- Japan
- Prior art keywords
- flocculant
- water
- flocculation
- flotation
- polymer flocculant
- 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 50
- 238000005188 flotation Methods 0.000 title claims abstract description 32
- 238000005189 flocculation Methods 0.000 title claims abstract description 24
- 230000016615 flocculation Effects 0.000 title claims abstract description 24
- 238000000926 separation method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 31
- 229920000642 polymer Polymers 0.000 claims abstract description 31
- 229920001577 copolymer Polymers 0.000 claims abstract description 9
- 150000003839 salts Chemical group 0.000 claims description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Chemical group OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical group COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 4
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical group CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 claims description 4
- 150000001450 anions Chemical group 0.000 claims description 4
- 229920001897 terpolymer Polymers 0.000 claims description 4
- 239000000178 monomer Substances 0.000 abstract description 16
- 125000000129 anionic group Chemical group 0.000 abstract description 8
- 125000002091 cationic group Chemical group 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 3
- 244000144992 flock Species 0.000 abstract 4
- 230000000052 comparative effect Effects 0.000 description 17
- 229920006318 anionic polymer Polymers 0.000 description 8
- 239000000701 coagulant Substances 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229920006317 cationic polymer Polymers 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- -1 alkali metal salt Chemical class 0.000 description 3
- 150000001768 cations Chemical group 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 125000003010 ionic group Chemical group 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- QENRKQYUEGJNNZ-UHFFFAOYSA-N 2-methyl-1-(prop-2-enoylamino)propane-1-sulfonic acid Chemical compound CC(C)C(S(O)(=O)=O)NC(=O)C=C QENRKQYUEGJNNZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical class [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 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 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 229940096992 potassium oleate Drugs 0.000 description 1
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 1
- 238000001612 separation test Methods 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、各種の工場から排
出される産業排水や河川水、井水、工業用水等の各種の
水を凝集浮上分離により処理する方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating various kinds of water such as industrial wastewater discharged from various factories, river water, well water, and industrial water by flocculation flotation.
【０００２】[0002]
【従来の技術】従来、懸濁物質（ＳＳ）等が含まれる排
水等の水の処理方法としては、ＳＳ等を沈降分離する方
法と、ＳＳ等を凝集させて浮上分離する方法がある。凝
集浮上分離法は、沈降分離法と比較すると、装置が小型
化できるので省スペース性に優れる点や、被処理水の種
類によっては効率的に処理できる等の利点を有してい
る。2. Description of the Related Art Conventionally, as a method of treating water such as waste water containing suspended matter (SS) and the like, there are a method of separating SS and the like by sedimentation and a method of flocculating and separating SS and the like. Compared with the sedimentation separation method, the flocculation separation method has advantages in that the apparatus can be downsized and thus is excellent in space saving and can be efficiently processed depending on the type of water to be treated.
【０００３】凝集浮上分離法で被処理水、例えば排水を
処理するには、凝集剤を排水に添加して排水中のＳＳ等
を凝集させてフロックを形成し、空気を含む加圧水を排
水に混合して、大気圧に開放させることによって発生す
る微細な気泡をフロックに付着させてフロックを浮上さ
せ、分離する方法が一般的である。To treat water to be treated, such as wastewater, by the flocculation flotation method, a flocculant is added to the wastewater to aggregate SS and the like in the wastewater to form flocs, and pressurized water containing air is mixed with the wastewater. Then, a general method is to attach fine air bubbles generated by opening to atmospheric pressure to the flocs to float the flocs and separate them.
【０００４】凝集浮上分離法における凝集剤としては、
従来、無機凝集剤、アニオン性高分子凝集剤またはカチ
オン性高分子凝集剤が用いられており、これらの凝集剤
を単独で用いる方法と、無機凝集剤とアニオン性高分子
凝集剤を併せて用いる方法がある。As the flocculant in the flocculation flotation method,
Conventionally, an inorganic flocculant, an anionic polymer flocculant, or a cationic polymer flocculant has been used. A method of using these flocculants alone and a method of using an inorganic flocculant and an anionic polymer flocculant together There is a way.
【０００５】また、近年になり、凝集浮上分離の際のフ
ロックの浮上性を高めるために、高分子凝集剤を用いず
に、無機凝集剤を用いて凝集して、高級脂肪酸のアルカ
リ金属塩を浮上助剤として添加して、加圧浮上させる方
法（特公平２−３６３１３号）が提案されている。Further, in recent years, in order to improve the flotability of flocs during flotation separation, flocculation is carried out using an inorganic flocculant instead of a polymer flocculant to obtain an alkali metal salt of a higher fatty acid. A method (Japanese Patent Publication No. 2-36313) of adding under pressure as a levitation aid and allowing levitation under pressure has been proposed.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、従来の
無機凝集剤、アニオン性高分子凝集剤、カチオン性高分
子凝集剤を用いる凝集浮上分離法では十分なフロックの
浮上性が得られず、処理水質の悪化や、浮上せずに凝集
浮上分離装置の底部に沈積したフロックを引き抜いて除
去する必要があった。このため、排水中のフロックを効
率よく凝集浮上分離することができない欠点があった。However, the flocculation flotation separation method using the conventional inorganic flocculant, anionic polymer flocculant, and cationic polymer flocculant cannot obtain sufficient floc flotation, and the treated water quality is improved. And it was necessary to pull out and remove the flocs deposited on the bottom of the flocculation flotation device without floating. Therefore, there is a drawback that flocs in the drainage cannot be efficiently flocculated and separated.
【０００７】また、特公平２−３６３１３号公報に記載
された方法でも、フロックの浮上性は十分とはいえなか
った。さらに、浮上助剤として高級脂肪酸のアルカリ金
属塩を使用するため、処理水中に浮上助剤が残留して、
加圧浮上工程の後段での発泡や、処理水のＣＯＤの上昇
を招く虞れがあるなどの問題点がある。Further, even with the method described in Japanese Patent Publication No. 2-36313, the flocculating property of the flocs cannot be said to be sufficient. Furthermore, since an alkali metal salt of higher fatty acid is used as a floating aid, the floating aid remains in the treated water,
There are problems that foaming may occur in the latter stage of the pressure floating step and that COD of the treated water may increase.
【０００８】本発明が解決しようとする課題は、上記従
来技術の欠点を解消し、凝集浮上分離におけるフロック
の浮上性を向上させることで、効率よく被処理水中のＳ
Ｓ等を凝集浮上分離する方法を提供することである。The problem to be solved by the present invention is to solve the above-mentioned drawbacks of the prior art and improve the flotability of flocs in flocculation flotation, so that S in water to be treated can be efficiently treated.
It is to provide a method for flocculating and separating S and the like.
【０００９】[0009]
【課題を解決するための手段】本発明者らが、上記課題
を解決するために鋭意研究を重ねた結果、凝集剤として
特定の構造の高分子凝集剤を使用すればよいことを見出
し、本発明を完成するに至った。Means for Solving the Problems As a result of intensive studies conducted by the present inventors in order to solve the above-mentioned problems, they found that a polymer flocculant having a specific structure should be used as the flocculant. The invention was completed.
【００１０】すなわち本発明は、（１）被処理水に凝集
剤を添加してフロックを形成し、該フロックに気泡を付
着させて浮上させる凝集浮上分離による水の処理方法に
おいて、凝集剤として一分子中にカチオン基およびアニ
オン基を有する両性高分子凝集剤を用いることを特徴と
する凝集浮上分離による水の処理方法、および（２）凝
集剤として無機凝集剤および両性高分子凝集剤を用いる
ことを特徴とする前記（１）項に記載の凝集浮上分離に
よる水の処理方法に関するものである。That is, according to the present invention, (1) in a method of treating water by coagulation flotation, in which a flocculant is added to water to be treated to form flocs, and bubbles are adhered to the flocs to float. A method for treating water by flocculation flotation, which comprises using an amphoteric polymer flocculant having a cation group and an anion group in the molecule, and (2) using an inorganic flocculant and an amphoteric polymer flocculant as the flocculant The present invention relates to a method of treating water by flotation separation according to item (1) above.
【００１１】[0011]
【発明の実施の形態】本発明方法において用いられる両
性高分子凝集剤は、一分子中にカチオン基およびアニオ
ン基を有する高分子化合物であれば特に限定されない
が、例えば、ジメチルアミノエチル（メタ）アルクリレ
ートの３級塩および４級塩から選ばれた少なくとも１種
のカチオン性単量体と、アクリル酸およびその塩、２−
アクリルアミド−２−メチルプロパンスルホン酸塩等か
ら選ばれた１種以上のアニオン性単量体との共重合物、
あるいは上記のカチオン性単量体およびアニオン性単量
体とアクリルアミド等のノニオン性単量体との三元もし
くは四元以上の共重合体を挙げることができる。中で
も、カチオン性単量体とアニオン性単量体と、およびノ
ニオン性単量体との三元もしくは四元共重合体が好適で
ある。三元共重合体としては、ジメチルアミノエチルア
クリレート４級塩、アクリル酸もしくはその塩、および
アクリルアミドの三元共重合体やジメチルアミノエチル
メタクリレート４級塩、アクリル酸もしくはその塩、お
よびアクリルアミドの三元共重合体が挙げられる。ま
た、四元共重合体としては、ジメチルアミノエチルアク
リレート４級塩、ジメチルアミノエチルメタクリレート
４級塩、アクリル酸もしくはその塩、およびアクリルア
ミドの四元共重合体を挙げることができる。BEST MODE FOR CARRYING OUT THE INVENTION The amphoteric polymer flocculant used in the method of the present invention is not particularly limited as long as it is a polymer compound having a cation group and an anion group in one molecule. For example, dimethylaminoethyl (meth) At least one cationic monomer selected from tertiary and quaternary salts of acrylate, acrylic acid and salts thereof, 2-
A copolymer with one or more anionic monomers selected from acrylamido-2-methylpropane sulfonate, etc.,
Alternatively, a ternary or quaternary or more copolymer of the above-mentioned cationic monomer and anionic monomer and a nonionic monomer such as acrylamide can be mentioned. Among them, a ternary or quaternary copolymer of a cationic monomer, an anionic monomer, and a nonionic monomer is preferable. Examples of the terpolymer include dimethylaminoethyl acrylate quaternary salt, acrylic acid or its salt, and acrylamide terpolymer or dimethylaminoethyl methacrylate quaternary salt, acrylic acid or its salt, and acrylamide ternary copolymer. A copolymer is mentioned. Examples of the quaternary copolymer include a quaternary copolymer of dimethylaminoethyl acrylate quaternary salt, dimethylaminoethyl methacrylate quaternary salt, acrylic acid or its salt, and acrylamide.
【００１２】本発明方法で使用される両性高分子凝集剤
の単量体構成割合は特に限定されないが、例えば、カチ
オン性単量体５〜９５モル％、アニオン性単量体５〜３
０モル％およびノニオン性単量体９０モル％以下である
ことが好ましい。The proportion of monomers constituting the amphoteric polymer flocculant used in the method of the present invention is not particularly limited, but for example, 5 to 95 mol% of cationic monomers and 5 to 3 of anionic monomers.
It is preferably 0 mol% and 90 mol% or less of the nonionic monomer.
【００１３】本発明方法は、まず処理をする水に両性高
分子凝集剤を添加して、フロックを形成させる。両性高
分子凝集剤の添加量は特に限定されないが、例えば、被
処理水に対して１〜１００ｍｇ／ｌの範囲内で適宜選択
すればよい。In the method of the present invention, the amphoteric polymer flocculant is added to the water to be treated to form flocs. The amount of the amphoteric polymer flocculant added is not particularly limited, but may be appropriately selected within the range of 1 to 100 mg / l with respect to the water to be treated, for example.
【００１４】フロックの浮上性をより向上させるために
は、両性高分子凝集剤を添加する前に、無機凝集剤を添
加することが好ましい。併用する無機凝集剤としては、
例えば、硫酸第一鉄、硫酸第二鉄、硫酸アルミニウム、
塩化第一鉄、塩化第二鉄、ポリ硫酸鉄、ポリ塩化アルミ
ニウム等の無機凝集剤を挙げることができるが、これら
に限定されることはない。これらの無機凝集剤の添加量
も特に限定されないが、例えば、被処理水に対して１〜
１０００ｍｇ／ｌの範囲で適宜選択すればよい。In order to further improve the floc floating property, it is preferable to add an inorganic coagulant before adding the amphoteric polymer coagulant. As the inorganic coagulant used in combination,
For example, ferrous sulfate, ferric sulfate, aluminum sulfate,
Inorganic flocculants such as ferrous chloride, ferric chloride, polyiron sulfate, and polyaluminum chloride can be mentioned, but not limited thereto. The addition amount of these inorganic coagulants is not particularly limited, for example, 1 to the water to be treated.
It may be appropriately selected within the range of 1000 mg / l.
【００１５】本発明方法の次の工程は、形成したフロッ
クに気泡を付着させ、フロックを浮上させる工程であ
る。気泡を発生させる手段は特に限定されないが、例え
ば、水に空気を加圧溶解させた加圧水を被処理水に混合
し、大気圧に開放して微細な気泡を生成させる方法や、
被処理水中に空気をノズルから微細気泡状で放出する方
法等が挙げられる。また、気泡を被処理水に混合する工
程は一般的には凝集フロックを生成させる工程の後であ
るが、本発明においては凝集フロックを生成させる工程
の前後または同箇所のいずれでも可能である。凝集浮上
したフロックはスカムを形成するが、スカムは適宜除去
すればよい。The next step of the method of the present invention is a step of attaching bubbles to the formed flocs to float the flocs. Means for generating bubbles is not particularly limited, for example, a method of mixing pressurized water obtained by pressure-dissolving air in water with water to be treated, and opening to atmospheric pressure to generate fine bubbles,
Examples include a method in which air is discharged in the form of fine bubbles from the nozzle into the water to be treated. Further, the step of mixing the air bubbles with the water to be treated is generally after the step of producing the floc, but in the present invention, it may be performed before or after the step of producing the floc or at the same position. The flocs that have flocculated and floated form scum, but the scum may be appropriately removed.
【００１６】また、必要により酸・アルカリを添加して
凝集に適したｐＨに調整してもよい。If necessary, an acid or alkali may be added to adjust the pH to a value suitable for aggregation.
【００１７】本発明方法により分離される対象は、例え
ば、ＳＳ、油分、不溶化した各種イオン等凝集浮上分離
できるものであれば特に限定されない。また、本発明方
法の対象となる被処理水も特に限定されないが、例え
ば、各種の工場から排出される産業排水や河川水、井
水、工業用水等の各種の水を挙げることができる。The object to be separated by the method of the present invention is not particularly limited as long as it is capable of flotation separation such as SS, oil and various insolubilized ions. The water to be treated which is the subject of the method of the present invention is not particularly limited, and examples thereof include various kinds of water such as industrial wastewater discharged from various factories, river water, well water, and industrial water.
【００１８】[0018]
【作用】本発明方法により、フロックの浮上性が向上す
る作用機構は明かではないが、以下のように推察され
る。The mechanism by which the flocculation of the flocs is improved by the method of the present invention is not clear, but it is presumed as follows.
【００１９】両性高分子凝集剤には、一分子中にカチオ
ン基とアニオン基が存在し、水中の懸濁物質に対して、
懸濁物質がプラスに帯電している場合はアニオン基、マ
イナスに帯電している場合はカチオン基が作用する。す
なわち、両性高分子凝集剤の場合は、懸濁物質と作用し
ていない未反応のイオン基が存在する状態となる。The amphoteric polymer flocculant has a cation group and an anion group in one molecule, and is suitable for a suspended substance in water.
When the suspended substance is positively charged, an anionic group acts, and when the suspended substance is negatively charged, a cationic group acts. That is, in the case of the amphoteric polymer coagulant, there is an unreacted ionic group that does not act on the suspended substance.
【００２０】これら未反応のイオン基は気泡との親和性
が高くなるものと考えられ、その結果、高分子凝集剤と
して両性高分子凝集剤を用いるとフロックに気泡が付着
しやすくなり、フロックの浮上性が向上するものと考え
られる。It is considered that these unreacted ionic groups have a high affinity with bubbles. As a result, when an amphoteric polymer flocculant is used as the polymer flocculant, the bubbles tend to adhere to the flocs, and It is considered that the floatability is improved.
【００２１】以下、実施例により本発明をさらに詳細に
説明するが、本発明はこれら実施例により限定されるも
のではない。Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
【００２２】[0022]
【実施例】実施例および比較例で用いた両性高分子凝集
剤（Ａｍ１〜Ａｍ４）、アニオン性高分子凝集剤（Ａ
ｎ）およびカチオン性高分子凝集剤（Ｃ）の種類とモノ
マー組成を表１に示す。EXAMPLES Amphoteric polymer flocculants (Am1 to Am4) and anionic polymer flocculants (A used in Examples and Comparative Examples)
Table 1 shows the types and monomer compositions of n) and the cationic polymer flocculant (C).
【００２３】[0023]
【表１】 [Table 1]
【００２４】実施例１〜４、比較例１、２ 図１は、本発明の一実施形態を説明するための装置のフ
ロー図であり、図１において１は凝集反応槽、２は浮上
分離槽、３は両性高分子凝集剤、４は加圧水である。Examples 1 to 4 and Comparative Examples 1 and 2 FIG. 1 is a flow chart of an apparatus for explaining an embodiment of the present invention. In FIG. 1, 1 is a flocculation reaction tank and 2 is a flotation separation tank. 3 is an amphoteric polymer flocculant, and 4 is pressurized water.
【００２５】ＳＳ濃度５００ｍｇ／ｌの排水に、表３に
示した両性高分子凝集剤３を添加し、凝集反応槽１で攪
拌して凝集反応を行い、フロックを形成させた。凝集反
応が終了した排水を浮上分離槽２に移送する途中で加圧
水４を混合した。導入した加圧水は、大気圧に開放さ
れ、微細な気泡が発生した。微細な気泡はフロックに付
着し、フロックは浮上分離槽２で浮上し、スカムが形成
した。このときの、フロックの浮上性と処理水中のＳＳ
濃度を測定し、その結果を表３に示した。The amphoteric polymer flocculant 3 shown in Table 3 was added to waste water having an SS concentration of 500 mg / l, and the flocculation was performed by stirring in the flocculation reaction tank 1 to cause flocculation reaction. Pressurized water 4 was mixed in the middle of transferring the wastewater after the coagulation reaction to the flotation separation tank 2. The introduced pressurized water was released to atmospheric pressure, and fine bubbles were generated. The fine bubbles adhered to the flocs, and the flocs floated in the flotation separation tank 2 to form scum. At this time, floc floatability and SS in treated water
The concentration was measured, and the results are shown in Table 3.
【００２６】なお、比較例１として、カチオン性高分子
凝集剤（Ｃ）、比較例２としてアニオン性高分子凝集剤
（Ａｎ）を両性高分子凝集剤に代えて加え、凝集浮上分
離した。比較例のフロックの浮上性と処理水のＳＳ濃度
の測定結果を併せて結果を表３に示す。In Comparative Example 1, a cationic polymer flocculant (C) and in Comparative Example 2 an anionic polymer flocculant (An) were added instead of the amphoteric polymer flocculant, and flocculated and separated by flotation. Table 3 shows the results of the flotation of the flocs of the comparative example and the measurement results of the SS concentration of the treated water.
【００２７】凝集浮上分離装置の運転条件を表２に示
す。Table 2 shows the operating conditions of the flocculation flotation device.
【００２８】[0028]
【表２】 [Table 2]
【００２９】実施例５〜８、比較例３、４ 図２に示した装置を用いて、以下のような凝集浮上分離
試験を行った。Examples 5 to 8 and Comparative Examples 3 and 4 Using the apparatus shown in FIG. 2, the following flotation separation test was conducted.
【００３０】ＳＳ濃度５００ｍｇ／ｌの排水に表３に示
す無機凝集剤５と苛性ソーダ６を添加して、第１凝集反
応槽１1に供給し、ｐＨ７で攪拌した。第２凝集反応槽
１2へ移送する途中で表３に示した両性高分子３を添加
した。第２凝集反応槽１2で攪拌しながらフロックを形
成させ、浮上分離槽２へ移送する途中で加圧水４を混合
した。微細な気泡が付着したフロックは浮上分離槽２で
浮上し、スカムを形成した。このときの、フロックの浮
上性と処理水中のＳＳ濃度を測定し、その結果を表３に
示した。Inorganic coagulant 5 and caustic soda 6 shown in Table 3 were added to waste water having an SS concentration of 500 mg / l, which was supplied to the first coagulation reaction tank 1 1 and stirred at pH 7. It was added amphoteric polymer 3 shown in Table 3 in the course of transfer to the second flocculation reaction tank 1 2. Floc is formed with stirring at a second flocculation reaction tank 1 2, were mixed pressurized water 4 in the course of transfer to the flotation tank 2. The flocs to which fine air bubbles were attached floated in the floating separation tank 2 to form scum. At this time, the floc floatability and the SS concentration in the treated water were measured, and the results are shown in Table 3.
【００３１】なお、比較例として、無機凝集剤とアニオ
ン性高分子凝集剤を併用した場合（比較例３）と、無機
凝集剤と浮上助剤としてオレイン酸カリウムを併用した
場合（比較例４）を試験した。浮上助剤７は第１凝集反
応槽１1の入り口で添加した。比較例のフロックの浮上
性と処理水のＳＳ濃度の測定結果を併せて表３に示す。As comparative examples, a case where an inorganic flocculant and an anionic polymer flocculant are used together (Comparative Example 3) and a case where inorganic flocculant and potassium oleate are used as a flotation aid (Comparative Example 4) Was tested. Floating aid 7 is added at the entrance to the first flocculation reaction tank 1 1. Table 3 also shows the flotability of the flocs of the comparative example and the measurement results of the SS concentration of the treated water.
【００３２】凝集浮上分離装置の運転条件は表２に準じ
た。The operating conditions of the flocculation flotation device are shown in Table 2.
【００３３】[0033]
【表３】 [Table 3]
【００３４】表３に示した結果から明らかなように、両
性高分子凝集剤を使用した実施例１〜８の本発明例は、
いずれもフロックの浮上性が良好であり、かつ処理水の
ＳＳ濃度も比較例に比べて全て低い結果となり、効率良
く安定した凝集浮上分離を行うことができた。また、無
機凝集剤と両性高分子凝集剤を併用した実施例５〜８
は、両性高分子凝集剤単独の実施例１〜４に比し、処理
水ＳＳ濃度が低くなり、より効率的にＳＳを凝集浮上分
離できることがわかる。As is clear from the results shown in Table 3, the inventive examples of Examples 1 to 8 in which the amphoteric polymer flocculant was used,
In all cases, the floc floating property was good, and the SS concentration of the treated water was all lower than that of the comparative example, and efficient and stable flocculation flotation could be performed. In addition, Examples 5 to 8 in which an inorganic flocculant and an amphoteric polymer flocculant are used in combination
In comparison with Examples 1 to 4 in which the amphoteric polymer flocculant is used alone, the SS concentration of the treated water is low, and SS can be more efficiently flocculated and separated.
【００３５】これに対し、カチオン性高分子凝集剤、ア
ニオン性高分子凝集剤をそれぞれ単独で使用した比較例
１と比較例２は、十分なフロックの浮上性が得られず、
処理水中のＳＳ濃度も高く、良好な結果が得られなかっ
た。また、ポリ塩化アルミニウムとアニオン性高分子凝
集剤を併用した比較例３は、比較例１や比較例２に比べ
るとフロックの浮上性および処理水のＳＳ濃度のいずれ
についても向上するが、本発明より劣り、効率良く凝集
浮上分離を行うには不十分であった。さらに、高分子凝
集剤を用いずに無機凝集剤と浮上助剤とを用いた比較例
４は、比較例１〜３に比べフロックの浮上性については
改善されているものの、本発明に比べるとフロックの浮
上性および処理水ＳＳ濃度のいずれの点でも劣ってい
た。On the other hand, in Comparative Example 1 and Comparative Example 2 in which the cationic polymer coagulant and the anionic polymer coagulant were used alone, sufficient floc floatability was not obtained,
The SS concentration in the treated water was also high, and good results were not obtained. In addition, Comparative Example 3 in which polyaluminum chloride and an anionic polymer flocculant are used together has improved flotation of flocs and SS concentration of treated water as compared with Comparative Examples 1 and 2, but the present invention It was inferior and insufficient for efficient flotation separation. Further, Comparative Example 4 using the inorganic flocculant and the flotation aid without using the polymer flocculant has improved floc floatability as compared with Comparative Examples 1 to 3, but compared to the present invention. It was inferior in both floating property of flocs and SS concentration of treated water.
【００３６】[0036]
【発明の効果】本発明方法により、フロックの浮上性が
向上するため、排水等の被処理水中のＳＳ等を効率的に
凝集浮上分離することができる。The flotability of flocs is improved by the method of the present invention, so that SS or the like in treated water such as drainage can be efficiently flocculated and separated.
【図１】本発明方法の一実施態様を説明する装置のフロ
ー図。FIG. 1 is a flow chart of an apparatus for explaining an embodiment of the method of the present invention.
【図２】本発明方法の他の一実施態様を説明する装置の
フロー図。FIG. 2 is a flow chart of an apparatus for explaining another embodiment of the method of the present invention.
１ 凝集反応槽 １1 第１凝集反応槽 １2 第２凝集反応槽 ２ 浮上分離槽 ３ 両性高分子凝集剤 ４ 加圧水 ５ 無機凝集剤 ６ 苛性ソーダ ７ 浮上助剤1 Aggregation reaction tank 1 1 1st aggregation reaction tank 1 2 2nd aggregation reaction tank 2 Flotation separation tank 3 Amphoteric polymer flocculant 4 Pressurized water 5 Inorganic flocculant 6 Caustic soda 7 Floating aid
Claims (3)
形成し、該フロックに気泡を付着させて浮上させる凝集
浮上分離による水の処理方法において、凝集剤として一
分子中にカチオン基およびアニオン基を有する両性高分
子凝集剤を用いることを特徴とする凝集浮上分離による
水の処理方法。1. A method for treating water by flocculation flotation, in which a flocculant is added to water to be treated to form flocs, and bubbles are adhered to the flocs to be floated. A method for treating water by flotation separation, which comprises using an amphoteric polymer flocculant having an anion group.
子凝集剤を用いることを特徴とする請求項１記載の凝集
浮上分離による水の処理方法。2. The method for treating water by flotation according to claim 1, wherein an inorganic flocculant and an amphoteric polymer flocculant are used as the flocculant.
チルアクリレート４級塩、アクリル酸もしくはその塩、
およびアクリルアミドの三元共重合体、ジメチルアミノ
エチルメタクリレート４級塩、アクリル酸もしくはその
塩、およびアクリルアミドの三元共重合体、およびジメ
チルアミノエチルアクリレート４級塩、ジメチルアミノ
エチルメタクリレート４級塩、アクリル酸もしくはその
塩、およびアクリルアミドの四元共重合体から選ばれる
少なくとも１種の共重合体であることを特徴とする請求
項１または請求項２に記載の水の処理方法。3. The amphoteric polymer flocculant is dimethylaminoethyl acrylate quaternary salt, acrylic acid or its salt,
And terpolymer of acrylamide, quaternary salt of dimethylaminoethyl methacrylate, acrylic acid or its salt, and terpolymer of acrylamide, quaternary salt of dimethylaminoethyl acrylate, quaternary salt of dimethylaminoethyl methacrylate, acrylic The method for treating water according to claim 1 or 2, wherein the water or the salt thereof is at least one copolymer selected from a quaternary copolymer of acrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8140138A JPH09314151A (en) | 1996-06-03 | 1996-06-03 | Water treatment method by flocculation flotation separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8140138A JPH09314151A (en) | 1996-06-03 | 1996-06-03 | Water treatment method by flocculation flotation separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09314151A true JPH09314151A (en) | 1997-12-09 |
Family
ID=15261770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8140138A Pending JPH09314151A (en) | 1996-06-03 | 1996-06-03 | Water treatment method by flocculation flotation separation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09314151A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002355506A (en) * | 2001-05-31 | 2002-12-10 | Japan Organo Co Ltd | Flocculating and settling equipment |
| WO2005058762A1 (en) * | 2003-12-19 | 2005-06-30 | De Oliveira Gomes Joao Carlos | 'an installation for the removal of pollutant materials and/or substances contained in water streams' |
| WO2015045093A1 (en) * | 2013-09-27 | 2015-04-02 | 栗田工業株式会社 | Water treatment method |
| CN119461709A (en) * | 2024-11-13 | 2025-02-18 | 长沙矿山研究院有限责任公司 | Treatment and reuse of spodumene beneficiation wastewater |
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|---|---|---|---|---|
| JPS6044086A (en) * | 1983-08-22 | 1985-03-08 | Shinryo Air Conditioning Co Ltd | Sludge thickening method |
| JPS6064684A (en) * | 1983-09-19 | 1985-04-13 | Shinryo Air Conditioning Co Ltd | Sludge concentration method and equipment used therefor |
| JPH02180700A (en) * | 1988-12-29 | 1990-07-13 | Kurita Water Ind Ltd | Organic sludge dewatering method |
| JPH0459100A (en) * | 1990-06-20 | 1992-02-25 | Nippon Gesuidou Jigyodan | Organic sludge dewatering method |
| JPH04298300A (en) * | 1991-03-27 | 1992-10-22 | Kurita Water Ind Ltd | Sludge dehydrating agent and method for dehydrating sludge by using this agent |
| JPH0796284A (en) * | 1993-09-29 | 1995-04-11 | Kurita Water Ind Ltd | Oily wastewater treatment method |
| JPH07328644A (en) * | 1994-06-01 | 1995-12-19 | Kurita Water Ind Ltd | Sewage coagulation treatment method |
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1996
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044086A (en) * | 1983-08-22 | 1985-03-08 | Shinryo Air Conditioning Co Ltd | Sludge thickening method |
| JPS6064684A (en) * | 1983-09-19 | 1985-04-13 | Shinryo Air Conditioning Co Ltd | Sludge concentration method and equipment used therefor |
| JPH02180700A (en) * | 1988-12-29 | 1990-07-13 | Kurita Water Ind Ltd | Organic sludge dewatering method |
| JPH0459100A (en) * | 1990-06-20 | 1992-02-25 | Nippon Gesuidou Jigyodan | Organic sludge dewatering method |
| JPH04298300A (en) * | 1991-03-27 | 1992-10-22 | Kurita Water Ind Ltd | Sludge dehydrating agent and method for dehydrating sludge by using this agent |
| JPH0796284A (en) * | 1993-09-29 | 1995-04-11 | Kurita Water Ind Ltd | Oily wastewater treatment method |
| JPH07328644A (en) * | 1994-06-01 | 1995-12-19 | Kurita Water Ind Ltd | Sewage coagulation treatment method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002355506A (en) * | 2001-05-31 | 2002-12-10 | Japan Organo Co Ltd | Flocculating and settling equipment |
| WO2005058762A1 (en) * | 2003-12-19 | 2005-06-30 | De Oliveira Gomes Joao Carlos | 'an installation for the removal of pollutant materials and/or substances contained in water streams' |
| WO2015045093A1 (en) * | 2013-09-27 | 2015-04-02 | 栗田工業株式会社 | Water treatment method |
| CN119461709A (en) * | 2024-11-13 | 2025-02-18 | 长沙矿山研究院有限责任公司 | Treatment and reuse of spodumene beneficiation wastewater |
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