JPH0582241B2 - - Google Patents
Info
- Publication number
- JPH0582241B2 JPH0582241B2 JP60189396A JP18939685A JPH0582241B2 JP H0582241 B2 JPH0582241 B2 JP H0582241B2 JP 60189396 A JP60189396 A JP 60189396A JP 18939685 A JP18939685 A JP 18939685A JP H0582241 B2 JPH0582241 B2 JP H0582241B2
- Authority
- JP
- Japan
- Prior art keywords
- organic polymer
- polymer electrolyte
- flocculant
- wastewater
- salt
- 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 - Lifetime
Links
- 229920000620 organic polymer Polymers 0.000 claims description 48
- 239000005518 polymer electrolyte Substances 0.000 claims description 40
- 125000000129 anionic group Chemical group 0.000 claims description 23
- 125000002091 cationic group Chemical group 0.000 claims description 22
- 239000002351 wastewater Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 150000003863 ammonium salts Chemical class 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000005189 flocculation Methods 0.000 claims description 10
- 230000016615 flocculation Effects 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 230000003311 flocculating effect Effects 0.000 claims 1
- -1 ammonioethyl salt Chemical class 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 6
- 208000005156 Dehydration Diseases 0.000 description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 5
- 238000006297 dehydration reaction Methods 0.000 description 5
- 239000008394 flocculating agent Substances 0.000 description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 4
- 229920006322 acrylamide copolymer Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 159000000000 sodium salts Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 229920001281 polyalkylene Polymers 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- SJIXRGNQPBQWMK-UHFFFAOYSA-N 2-(diethylamino)ethyl 2-methylprop-2-enoate Chemical compound CCN(CC)CCOC(=O)C(C)=C SJIXRGNQPBQWMK-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical group 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
「産業上の利用分野」
本発明は産業廃水、生活廃水などを処理する際
に添加して排水中の懸濁物質を効果的に凝集せし
める改良した凝集剤及びこの凝集剤を用いた凝集
法に関するものである。
「従来の技術」
従来、上記のような廃水を処理する凝集剤とし
てはアニオン性有機高分子凝集剤及びカチオン性
有機高分子凝集剤があり、処理法としてはこれら
の各々を単独で添加するか、両者を逐次添加して
懸濁物質を凝集せしめていた。
「発明が解決しようとする問題点」
上記従来の技術ではアニオン性有機高分子凝集
剤を単独で添加する場合は懸濁物質は架橋吸着に
よつて凝集し、生成したフロツクは小さくて強度
が低く、次後の工程において沈澱や過をする際
その速度が遅く、且つ脱水不良を生ずることが多
く、カチオン性有機高分子凝集剤単独の場合も生
成するフロツクの性状や大きさ及びその脱水性に
若干の差はあるが殆ど同様であり、又アニオン性
有機高分子凝集剤とカチオン性有機高分子凝集剤
を逐次添加する場合は優れた凝集効果があり、大
きいフロツクになるが架橋吸着であるため結合力
は弱く、強度が低くて砕け易く、且つ親水性であ
るため、脱水性が悪く、特に加圧過、ベルトプ
レス過等の布を使用する脱水処理を行なう場
合は脱水後の汚泥は布からの剥離性が悪く、脱
水効率もよくない。すなわち上記のようなフロツ
クが加圧脱水されるとフロツクは砕けてフロツク
間の脱水路は閉ざされ、内部の水は除去されない
で留まり、且つ、砕けたフロツクは材の目を詰
めて、脱水効率の低下を増幅させることとなり、
更に２種の高分子凝集剤を用いるので溶解槽が２
基必要であるなど設備費が高価で、管理が煩雑で
あるなどの問題点があつた。
本発明の目的はこれらの問題点を解決するため
の優れた凝集剤及びこれを用いた効率的な凝集法
を提供することである。
「問題点を解決するための手段」
アニオン性有機高分子凝集剤とカチオン性有機
高分子凝集剤を同一溶液に溶解すると互いに反応
して析出物を生成してしまい、廃水中の懸濁物質
とは反応しないものになつてしまう。本発明者ら
は両者を共存させても水に容易に且つ完全に溶解
し、懸濁物質に作用して大きくて硬いフロツクを
生成せしめる手段を鋭意研究の結果、両者に２価
の金属塩及び無機アンモニウム塩を共存せしめる
のが効果的であることを究明した。
本発明の構成はアニオン性有機高分子電解質と
カチオン性有機高分子電解質と２価の金属塩と無
機アンモニウム塩を混交してなる凝集剤である。
また、第２の発明として、アニオン性有機高分子
電解質とカチオン性有機高分子電解質と２価の金
属塩と無機アンモニウム塩を混交してなる凝集剤
を水に溶解して水溶液を作成した後、この水溶液
を廃水に添加して懸濁物質と反応させ凝集せしめ
る凝集法である。混交するアニオン性有機高分子
電解質及びカチオン性有機高分子電解質の形状は
液状、ペースト状、粉末状があり、その混合比は
有効分として１：10〜10：１であり、この範囲外
では凝集効果が低下する。２価の金属塩及び無機
アンモニウム塩の混合率は両高分子電解質の合計
重量に対して両塩を合計して50〜1000％、好まし
くは100〜500％であり、これらを同一容器内に入
れ、混合して本発明の凝集剤を得る。
アニオン性有機高分子電解質の種類としてはア
クリルアミド又はメタクリルアミドとアクリル酸
又はメタクリル酸の共重合物のナトリウム塩、ア
クリルアミド−２−メチルプロパンスルホン酸ナ
トリウム共重合物などであり、カチオン性有機高
分子電解質としてはメタクリル酸エステル重合物
及び共重合物のカチオン変成物〔例えばポリメタ
クリル酸トリアルキル（又はジアルキルモノベン
ジル）アンモニオエチル塩、メタクリル酸ジエチ
ルアミノエチル・メタクリル酸トリエチルアミノ
エチル塩・アクリルアミド共重合物、メタクリル
酸Ｎ・N′−ジアルキルアミノアルキル・カクリ
ルアミド共重合物、メタクリル酸トリアルキルア
ンモノアルキル・アクリルアミド共重合物のクロ
ライド〕ポリアルキレンポリアミン及びその誘導
体〔例えばポリエチレンイミン、アルキル化ポリ
アルキレンポリアミン〕などであり、２価の金属
塩としては、塩化カルシウム、硝酸カルシウム、
塩化マグネシウムなどで、無機アンモニウム塩と
しては塩化アンモニウム、硝酸アンモニウムなど
である。
本発明の凝集剤を用いて廃水を処理するには、
廃水の性状、すなわち懸濁物質の種類、濃度及び
PHなどを予め測定しておき、前記アニオン性有機
高分子電解質とカチオン性有機高分子電解質の種
類及び混合比１：10〜10：１のものから選択する
のが好ましい。廃水に添加するのに先立ち、予備
作業として凝集剤を水に溶解するには、両有機高
分子電解質が合計で0.2〜5.％程に調整するのが
よく、又２価の金属塩及び無機アンモニウム塩の
合計が0.5〜20.0％好ましくは1.0〜10.0％になる
ように調整することが肝要であり、0.5％以下で
あるとアニオン性有機高分子電解質とカチオン性
有機高分子電解質が反応して析出物を生成してし
まい、20.0％以上であるとノニオン化したアニオ
ン性有機高分子電解質が凝集剤を廃水に添加後ア
ニオン性に戻るのに又マスキングされたカチオン
性有機高分子電解質がマスキングを解除されるの
に時間を要し、反応が遅くなる。この凝集剤の水
溶液を廃水に添加して懸濁物質と反応せしめ大き
くて強度が高いフロツクを生成させる、この際添
加量はアニオン性有機高分子電解質とカチオン性
有機高分子電解質の合計が懸濁物質に対して0.05
〜5.00重量％になるように調整するのが好まし
い。
「作用」
廃水処理の予備作業として本発明の凝集剤を水
に溶解して水溶液を作成するとアニオン性有機高
分子電解質は２価の金属塩及び無機アンモニウム
塩と反応してノニオン化し、且つ親水性を保持
し、又カチオン性有機高分子電解質はそのカチオ
ン基を無機アンモニウム塩のアンモニウムイオン
によつてマスキングされ、両有機高分子電解質同
士は反応せず、互いに近接した共溶状態となる。
次にこの水溶液を廃水に添加すると２価の金属イ
オン及びアンモニウムイオンは懸濁物質と反応
し、又は稀釈されるのでノニオン化したアニオン
性有機高分子電解質との結合は弱められ遂には切
れるので再びこのアニオン性有機高分子電解質は
アニオン性に戻り、又共溶しているカチオン性有
機高分子電解質もマスキングしていたアンモニウ
ムイオンが懸濁物質と反応し、又は稀釈されるの
でマスキングが解除され、カチオン性有機高分子
電解質としての働きをするので両有機高分子電解
質は析出反応を進ませながら懸濁物質との反応を
進める。このために近接している両有機高分子電
解質同士の反応により高分子鎖が搦み合つて巨大
分子量の高分子となつて析出しながら懸濁物質を
次々にとりこんで凝集させ、大きくて強度が高い
フロツクを形成させる。
「実施例」
(1) Ｓ化学会社の廃水（懸濁物質濃度900mg／、
PH6.9）にアニオン性有機高分子電解質のアク
リルアミド・アクリル酸共重合物のナトリウム
塩、カチオン性有機高分子電解質のメタクリル
酸トリアルキルアンモニオエチル塩、２価の金
属塩の塩化カルシウム及び無機アンモニウム塩
の塩化アンモニウムを３：１：2.5：2.5の比率
で混交してなる凝集剤（第１表中、M1で表示）
を前記した方法で水に溶解して各1.2％、0.4
％、1.0％及び1.0％の共溶液とし、これを廃水
に添加率がアニオン性有機高分子電解質が0.24
％／SS、カチオン性有機高分子電解質が0.08
％／SSになるように添加し、処理してフロツ
クを作り、スクリーン過を行ない第１表の結
果を得た。比較のため従来の凝集剤としてアク
リルアミド・アクリル酸共重合物のナトリウム
塩単独（第１表中、C1-1で表示）で添加率0.32
％／SSで処理した場合及びアクリルアミド・
アクリル酸共重合物のナトリウム塩0.24％／SS
とメタクリル酸トリアルキルアンモニオエチル
塩0.08％／SSを逐次添加（第１表中、C1-2で表
示）した場合を示す。
"Field of Industrial Application" The present invention relates to an improved flocculant that is added when treating industrial wastewater, domestic wastewater, etc. to effectively flocculate suspended solids in the wastewater, and a flocculation method using this flocculant. It is something. ``Prior Art'' Conventionally, there are anionic organic polymer flocculants and cationic organic polymer flocculants as flocculants for treating wastewater as described above, and treatment methods include adding each of these alone or Both were added sequentially to aggregate the suspended matter. "Problems to be Solved by the Invention" In the above-mentioned conventional technology, when anionic organic polymer flocculants are added alone, suspended substances are aggregated by cross-linking adsorption, and the resulting flocs are small and have low strength. In the subsequent steps, sedimentation and filtration are slow and often result in poor dehydration, and even when a cationic organic polymer flocculant is used alone, the properties and size of the flocs produced and their dehydration properties are affected. Although there are some differences, they are almost the same, and when an anionic organic polymer flocculant and a cationic organic polymer flocculant are added sequentially, there is an excellent flocculation effect, and although it results in a large floc, it is due to crosslinking adsorption. The binding force is weak, the strength is low, and the sludge is easily broken, and it is hydrophilic, so it has poor dewatering properties.Especially when dewatering using cloth, such as pressurization or belt press, the sludge after dewatering is washed with cloth. It has poor removability and poor dehydration efficiency. In other words, when the flocs described above are dewatered under pressure, the flocs break and the dewatering channels between the flocs are closed, and the water inside remains without being removed.Furthermore, the broken flocs close the grain of the wood and reduce the dewatering efficiency. This will amplify the decline in
Furthermore, since two types of polymer flocculants are used, there are two dissolution tanks.
There were problems such as high equipment costs and complicated management. The purpose of the present invention is to provide an excellent flocculant and an efficient flocculation method using the same to solve these problems. "Means for solving the problem" If an anionic organic polymer flocculant and a cationic organic polymer flocculant are dissolved in the same solution, they will react with each other and form precipitates, which will cause suspended solids in wastewater. becomes unresponsive. The inventors of the present invention have conducted intensive research on a means to easily and completely dissolve in water even when both coexist, and to act on suspended solids to form large, hard flocs. It was found that it is effective to coexist with inorganic ammonium salt. The composition of the present invention is a flocculant formed by mixing an anionic organic polymer electrolyte, a cationic organic polymer electrolyte, a divalent metal salt, and an inorganic ammonium salt.
Further, as a second invention, after creating an aqueous solution by dissolving in water a flocculant formed by mixing an anionic organic polymer electrolyte, a cationic organic polymer electrolyte, a divalent metal salt, and an inorganic ammonium salt, This is a flocculation method in which this aqueous solution is added to wastewater and reacts with suspended matter to flocculate it. The mixed anionic organic polymer electrolyte and cationic organic polymer electrolyte can be in the form of liquid, paste, or powder, and the mixing ratio is 1:10 to 10:1 in terms of effective content, and outside this range, they will not aggregate. effectiveness decreases. The mixing ratio of the divalent metal salt and the inorganic ammonium salt is 50 to 1000%, preferably 100 to 500%, based on the total weight of both polymer electrolytes, and these are placed in the same container. , and mix to obtain the flocculant of the present invention. Types of anionic organic polymer electrolytes include sodium salts of copolymers of acrylamide or methacrylamide and acrylic acid or methacrylic acid, sodium acrylamide-2-methylpropanesulfonate copolymers, and cationic organic polymer electrolytes. Examples include cationic modifications of methacrylic acid ester polymers and copolymers [for example, poly(trialkyl (or dialkyl monobenzyl) methacrylate) ammonioethyl salt, diethylaminoethyl methacrylate/triethylaminoethyl methacrylate/acrylamide copolymer, N/N'-dialkylaminoalkyl methacrylate/cacrylamide copolymer, chloride of trialkylammonoalkyl methacrylate/acrylamide copolymer] polyalkylene polyamine and its derivatives [e.g. polyethyleneimine, alkylated polyalkylene polyamine], etc. Divalent metal salts include calcium chloride, calcium nitrate,
Inorganic ammonium salts include ammonium chloride and ammonium nitrate. To treat wastewater using the flocculant of the present invention,
The nature of the wastewater, i.e. the type, concentration and concentration of suspended solids.
It is preferable to measure the PH etc. in advance and select from among the types and mixing ratio of the anionic organic polymer electrolyte and cationic organic polymer electrolyte of 1:10 to 10:1. In order to dissolve the flocculant in water as a preliminary step before adding it to wastewater, it is best to adjust the total amount of both organic polymer electrolytes to about 0.2 to 5%, and also add divalent metal salts and inorganic It is important to adjust the total amount of ammonium salt to 0.5-20.0%, preferably 1.0-10.0%, and if it is less than 0.5%, the anionic organic polymer electrolyte and cationic organic polymer electrolyte will react. If the concentration is 20.0% or more, the nonionized anionic organic polymer electrolyte will return to anionic state after adding the flocculant to the wastewater, but the masked cationic organic polymer electrolyte will be unmasked. It takes time to release and the reaction becomes slow. An aqueous solution of this flocculant is added to wastewater and reacts with suspended solids to form large and strong flocs. 0.05 for matter
It is preferable to adjust the content to ~5.00% by weight. "Operation" When the flocculant of the present invention is dissolved in water to create an aqueous solution as a preliminary work for wastewater treatment, the anionic organic polymer electrolyte reacts with the divalent metal salt and inorganic ammonium salt to become nonionic and hydrophilic. The cationic organic polymer electrolyte has its cation groups masked by the ammonium ions of the inorganic ammonium salt, and both organic polymer electrolytes do not react with each other and become co-soluble in close proximity to each other.
Next, when this aqueous solution is added to wastewater, the divalent metal ions and ammonium ions react with the suspended matter or are diluted, so that the bond with the nonionized anionic organic polymer electrolyte is weakened and finally broken, so that it can be used again This anionic organic polymer electrolyte returns to anionic state, and the ammonium ion that was masking the co-dissolved cationic organic polymer electrolyte reacts with the suspended matter or is diluted, so that the masking is released. Since they function as cationic organic polymer electrolytes, both organic polymer electrolytes advance the reaction with suspended substances while promoting the precipitation reaction. For this reason, due to the reaction between both organic polymer electrolytes that are in close proximity, the polymer chains combine to form a macromolecule with a large molecular weight.While precipitating, suspended substances are taken in one after another and agglomerated, resulting in a large and strong polymer. Forms a high flock. "Example" (1) Wastewater from S chemical company (suspended solids concentration 900mg/,
PH6.9), anionic organic polymer electrolyte sodium salt of acrylamide/acrylic acid copolymer, cationic organic polymer electrolyte trialkylammonioethyl methacrylate, divalent metal salt calcium chloride and inorganic ammonium. A flocculant made by mixing salt ammonium chloride in a ratio of 3:1:2.5:2.5 (indicated by M 1 in Table 1)
were dissolved in water using the method described above to give 1.2% and 0.4% each.
%, 1.0% and 1.0% co-solution, and this was added to wastewater at an anionic organic polymer electrolyte concentration of 0.24%.
%/SS, cationic organic polymer electrolyte is 0.08
%/SS, processed to form a floc, and screened to obtain the results shown in Table 1. For comparison, as a conventional flocculant, sodium salt of acrylamide/acrylic acid copolymer alone (indicated by C 1-1 in Table 1) was used at an addition rate of 0.32.
%/When treated with SS and acrylamide.
Sodium salt of acrylic acid copolymer 0.24%/SS
The case is shown in which 0.08% of trialkylammonioethyl methacrylate/SS was sequentially added (indicated by C 1-2 in Table 1).
【表】
本発明の凝集剤を用いた凝集法は従来品を用
いた凝集法に比し、過能力が大巾に優れ、
SS除去率もよく、ケーキの含水率が少なく、
著しく効果があつた。
(2) Ｍ繊維会社の工場廃水の活性汚泥処理の余剰
汚泥（懸濁物質9000mg／、PH6.7）をカチオ
ン性有機高分子電解質のポリメタクリル酸ジア
ルキルモノベンジルアンモニオエチル塩、アニ
オン性有機高分子電解質のアクリルアミド−２
−メチルプロパンスルホン酸ナトリウム共重合
物２価の金属塩の塩化マグネシウム及び無機ア
ンモニウム塩の硫酸アンモニウムを３：１：
2.5：2.5の比率で混交してなる凝集剤（第２表
中M2で表示）を前記の方法で水に溶解して共
溶液とした後、廃水に添加率がカチオン性有機
高分子電解質が1.2％／SS、アニオン性有機高
分子電解質が0.4％／SSになるように添加し処
理してフロツクを作り、これをベルトプレス方
式で脱水して第２表の結果を得た。比較のため
従来の凝集剤としてポリメタクリル酸ジアルキ
ルモノベンジルアンモニオエチル塩単独（第２
表中C2-1で表示）で添加率1.6％／SSで処理し
た場合及びポリメタクリル酸ジアルキルモノベ
ンジルアンモニオエチル塩1.2％／SSとアクリ
ルアミド−２−メチルプロパンスルホン酸ナト
リウム共重合物0.4％／SSを逐次添加（第２表
中C2-2で表示）し、処理した結果を示す。[Table] The flocculation method using the flocculant of the present invention has a much superior overcapacity compared to the flocculation method using conventional products.
The SS removal rate is also good, and the moisture content of the cake is low.
It was noticeably effective. (2) Surplus sludge (suspended solids 9000 mg/, pH 6.7) from activated sludge treatment of M Textile Company's factory wastewater was treated with cationic organic polymer electrolyte polymethacrylate dialkyl monobenzylammonioethyl salt, anionic organic polymer Molecular electrolyte acrylamide-2
-Sodium methylpropanesulfonate copolymer Divalent metal salt magnesium chloride and inorganic ammonium salt ammonium sulfate in 3:1 ratio:
After dissolving the flocculant (indicated by M 2 in Table 2) mixed in a ratio of 2.5:2.5 in water to form a co-solution, the addition rate to the wastewater is such that the cationic organic polymer electrolyte is 1.2%/SS and anionic organic polymer electrolyte 0.4%/SS were added and treated to form a floc, which was dehydrated using a belt press method to obtain the results shown in Table 2. For comparison, polymethacrylic acid dialkyl monobenzylammonioethyl salt alone (second
(indicated by C 2-1 in the table), the addition rate is 1.6%/treated with SS and polymethacrylic acid dialkyl monobenzylammonioethyl salt 1.2%/SS and sodium acrylamide-2-methylpropanesulfonate copolymer 0.4% /SS was sequentially added (indicated by C 2-2 in Table 2) and the results of treatment are shown.
【表】
本発明の凝集剤を用いた凝集法は従来品を用い
た凝集法に比し、過能力が格段によく、SS除
去率が極めてよく脱水後のケーキの含水率が少な
く著しく勝つていた。
「発明の効果」
本発明の凝集剤は以上のようにアニオン性有機
高分子電解質とカチオン性有機高分子電解質と２
価の金属塩と無機アンモニウム塩を混交してなる
ものであるから異なるイオン性の有機高分子電解
質を１液で溶解することができ、これを廃水に添
加すると各有機高分子電解質は元のイオン性に戻
り、前記のような効果的な反応が起るので、大き
くて且つ強度が高いフロツクが生成し、このため
次後の固液を分離する処理、すなわち凝集沈澱処
理、スクリーンによる過処理、材によるプレ
ス搾水処理、遠心脱水処理、ロールプレス処理、
及びスクリユープレス処理などを効果的に行なう
ことができるので処理能力が優れ、懸濁物質の回
収率がよく、脱水後のケーキの含水率が少ない、
又凝集剤は１種のみで、且つ高濃度に容易に溶解
できるので溶解槽が１基のみで、且つ小さいもの
でよいなど設備費が安価で操作が簡単であり、設
置面積が小さくてよいなど多くの効果がある。[Table] Compared to the flocculation method using the conventional flocculant, the flocculation method using the flocculant of the present invention has much better overcapacity, has an extremely high SS removal rate, and has a low water content in the cake after dewatering, and is significantly superior to the flocculation method using conventional products. Ta. "Effects of the Invention" As described above, the flocculant of the present invention has an anionic organic polymer electrolyte and a cationic organic polymer electrolyte.
Since it is a mixture of valent metal salts and inorganic ammonium salts, organic polymer electrolytes of different ionicity can be dissolved in one solution.When this is added to wastewater, each organic polymer electrolyte returns to its original ion. As the above-mentioned effective reaction occurs, a large and strong floc is formed, which is necessary for subsequent solid-liquid separation processes, such as coagulation-sedimentation, screen overtreatment, Material press water extraction treatment, centrifugal dehydration treatment, roll press treatment,
It can effectively perform processes such as screw press processing, so it has excellent processing capacity, high recovery rate of suspended solids, and low moisture content in the cake after dehydration.
In addition, only one type of flocculant is used, and it can be easily dissolved at a high concentration, so only one dissolution tank is required, and it is small. Equipment costs are low, operation is easy, and the installation area is small. It has many effects.
Claims (1)
機高分子電解質と２価の金属塩と無機アンモニウ
ム塩を混交してなることを特徴とする凝集剤。 ２ アニオン性有機高分子電解質とカチオン性有
機高分子電解質と２価の金属塩と無機アンモニウ
ム塩を混交してなる凝集剤を水に溶解して水溶液
を作成した後、この水溶液を廃水に添加して懸濁
物質と反応させ凝集せしめることを特徴とする凝
集法。[Scope of Claims] 1. A flocculant characterized by being formed by mixing an anionic organic polymer electrolyte, a cationic organic polymer electrolyte, a divalent metal salt, and an inorganic ammonium salt. 2. After creating an aqueous solution by dissolving in water a flocculant made by mixing an anionic organic polymer electrolyte, a cationic organic polymer electrolyte, a divalent metal salt, and an inorganic ammonium salt, this aqueous solution is added to wastewater. A flocculation method characterized by reacting with suspended substances and flocculating them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60189396A JPS6249917A (en) | 1985-08-30 | 1985-08-30 | Flocculant and flocculating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60189396A JPS6249917A (en) | 1985-08-30 | 1985-08-30 | Flocculant and flocculating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6249917A JPS6249917A (en) | 1987-03-04 |
| JPH0582241B2 true JPH0582241B2 (en) | 1993-11-18 |
Family
ID=16240594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60189396A Granted JPS6249917A (en) | 1985-08-30 | 1985-08-30 | Flocculant and flocculating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6249917A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4881009B2 (en) * | 2006-01-06 | 2012-02-22 | 松山株式会社 | Agricultural machine |
-
1985
- 1985-08-30 JP JP60189396A patent/JPS6249917A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6249917A (en) | 1987-03-04 |
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