JPS6391108A - Organic coagulant - Google Patents
Organic coagulantInfo
- Publication number
- JPS6391108A JPS6391108A JP23625286A JP23625286A JPS6391108A JP S6391108 A JPS6391108 A JP S6391108A JP 23625286 A JP23625286 A JP 23625286A JP 23625286 A JP23625286 A JP 23625286A JP S6391108 A JPS6391108 A JP S6391108A
- Authority
- JP
- Japan
- Prior art keywords
- cationic
- polyvinyl alcohol
- org
- floc
- flocculating agent
- 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
- 239000000701 coagulant Substances 0.000 title claims abstract description 30
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 23
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 23
- 125000002091 cationic group Chemical group 0.000 claims abstract description 13
- 239000008394 flocculating agent Substances 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 3
- 229920001661 Chitosan Polymers 0.000 abstract description 2
- 125000000129 anionic group Chemical group 0.000 abstract description 2
- 230000003311 flocculating effect Effects 0.000 abstract description 2
- 229920002401 polyacrylamide Polymers 0.000 abstract description 2
- 125000003158 alcohol group Chemical group 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
- 238000005352 clarification Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SSZWWUDQMAHNAQ-UHFFFAOYSA-N 3-chloropropane-1,2-diol Chemical compound OCC(O)CCl SSZWWUDQMAHNAQ-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 238000006845 Michael addition reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 235000012745 brilliant blue FCF Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003922 charged colloid Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 125000000686 lactone group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- PUVAFTRIIUSGLK-UHFFFAOYSA-M trimethyl(oxiran-2-ylmethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC1CO1 PUVAFTRIIUSGLK-UHFFFAOYSA-M 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明品は有機凝集剤と併用して懸濁物質のフロック形
成、凝集、沈降に利用され、工業用水処理、下水・し尿
処理、石油化学、紙パルプ、鉄錬非鉄金属、鉱山・土木
工事、窯業、染色、食品工業等の廃水処理に利用される
。[Detailed description of the invention] [Field of industrial application] The product of the present invention is used in combination with an organic flocculant to form flocs, flocculate, and settle suspended solids, and is used in industrial water treatment, sewage/human waste treatment, and petrochemistry. It is used for wastewater treatment of pulp and paper, iron wrought non-ferrous metals, mining and civil engineering, ceramics, dyeing, food industry, etc.
従来より凝結剤としては無機凝結剤として硫酸パンげや
ポリ塩化アルミニウム（ＰＡＣ！ ）、塩化第二鉄等が
多量に使用されている（「水処理実験法」社団法人日本
工業用水協会網、コロナ社昭和４６年６月２０日発行Ｐ
、６２〜５０）。しかし、有機凝集剤と併用する有機凝
結剤に関する文献・特許は未だ報告されていない。Conventionally, large amounts of inorganic coagulants such as pange sulfate, polyaluminum chloride (PAC!), and ferric chloride have been used as coagulants ("Water Treatment Experimental Methods" Japan Industrial Water Association Network, Corona P published June 20, 1971
, 62-50). However, no literature or patent regarding an organic coagulant used in combination with an organic coagulant has yet been reported.
凝結剤は、凝集剤とは作用が異なり、コロイｒ粒子（懸
濁物質、エマルジョン粒子）の負に帯電した荷電を中和
させる目的で使用される場合が多い。A coagulant has a different effect from a flocculant, and is often used for the purpose of neutralizing the negatively charged colloid particles (suspended matter, emulsion particles).
従来より無機凝結剤として硫酸バンドとＰＡＯ等が大量
に使用されているが、以下にあげる問題点があった。Conventionally, sulfuric acid, PAO, etc. have been used in large quantities as inorganic coagulants, but there have been the following problems.
１）多量に使用される為、金属水酸化物スラッジ（ＡＪ
（ＯＨ）３〕が多量に生成し、焼却コストが高い。1) Metal hydroxide sludge (AJ
(OH)3] is produced in large quantities, and the incineration cost is high.
２）硫酸パン？、ＰＡＯ等は−を酸性側へ低下させるの
で、排水の一調整用アルカリが必要である。2) Sulfuric bread? , PAO, etc. lower - to the acidic side, so an alkali is needed to adjust the wastewater.
６）硫酸パンｒからはｓｏ、”−１ＰＡＯからはＣＩ−
の腐蝕性イオンが発生する。6) So from pan sulfate r, CI- from "-1PAO"
of corrosive ions are generated.
本発明者は以上の問題点を解決する方法を探索した結果
、カチオン性ポリビニルアルコール（以下ポリビニルア
ルコールｉ ＰＶＡと略記）を有機凝結剤として有機凝
集剤に併用して使用したところ、従来の無機凝結剤の問
題点を全て解決でき、また少ない使用量で優れた沈降性
、高いフロック強度、優れた清澄性を示すことを見い出
し２本発明を完成するに至りだ。As a result of searching for a method to solve the above problems, the inventors of the present invention found that by using cationic polyvinyl alcohol (hereinafter abbreviated as polyvinyl alcohol i PVA) as an organic coagulant in combination with an organic coagulant, We have now completed the present invention after discovering that it can solve all of the problems associated with reagents and exhibit excellent sedimentation properties, high floc strength, and excellent clarity even when used in small amounts.
本発明は、カチオン性ＰＶＡ ’ｉｉ主成分とすること
を特徴とする有機凝結剤である。The present invention is an organic coagulant characterized by containing cationic PVA'ii as a main component.
本発明で使用されるカチオン性ＰＶＡとしては、ＰＶＡ
＠中にカチオン基を含有するものであれば全て使用可
能であり、カチオン基を含有することを必須としその他
ビニルアルコール、酢酸ビニル単位以外の共重合単位を
含有していてもさしつかえない。カチオン性ＰＶＡとし
て共１合により合成したものとして酢酸ビニル−ビニル
ピリジン共重合体ケン化物（高分子化学、８ ４６７
（１９５１）、酢酸ビニルービニルイミタ＋ゾール共
重合体ケン化物（特開昭５６−９９２０４刊公報）、酢
酸ビニル−アクリルアミげプロピルトリメチルアンモニ
ウムクロリ−共重合体ケン化物
（特開昭５６−１４５０４号公報）、酢酸ビニル−ジア
リルジメチルアンモニウムクロリド共重合体ケン化物（
特開昭５６−’１１８９９７号公報）、酢酸ビニル＝（
アリルオキシーヒげロキシプロピル）トリメチルアンモ
ニウムクロリシ共重合体ケン化物（特開昭５９−１３５
２０２号公報）等があげられる。後変性により合成した
ものと［２てはＰＶＡにカチオン性不飽和モノマーをグ
ラフト共１合したもの、ＰＶＡにグリシジルトリメチル
アンモニウムクロリドを反応させたもの、ＰＶＡにエビ
クロルヒダリンを反応させ、更にポリアルキレンポリア
ミンを反応させたもの（日本化学会誌腐１１．１９９５
（１９７５年））、ラクトン環を有するＰＶＡにヒドラ
ジン全作用させヒドラジド化したもの（特公昭５２−２
３３８２号公報）、ＰＶＡにアクリルアミドをマイケル
付加させ、次いでホフマン分解したもの（Ｂｕｌｌｅｔ
ｉｎ ｏｆ Ｃｈｅｍｉｃａｌ Ｓｏｃ土ｅｔｙｏｆ
Ｊａｐａｎ、４７ ２９９０（１９７４））等があげら
れる。The cationic PVA used in the present invention includes PVA
Any compound containing a cationic group can be used, and it is essential to contain a cationic group, and there is no problem even if it contains copolymerized units other than vinyl alcohol and vinyl acetate units. Saponified vinyl acetate-vinyl pyridine copolymer is a cationic PVA synthesized by co-polymerization (Kobunshi Kagaku, 8 467
(1951), saponified vinyl acetate-vinyl imita+sol copolymer (Japanese Patent Application Laid-Open No. 56-99204), saponified vinyl acetate-acrylamygepropyltrimethylammonium chloride copolymer (Japanese Patent Application Laid-open No. 56-14504) ), saponified vinyl acetate-diallyldimethylammonium chloride copolymer (
JP-A-56-118997), vinyl acetate = (
Saponified product of allyloxy-propyltrimethylammonium chloride copolymer (JP-A-59-135
202 Publication), etc. There are two types: one synthesized by post-denaturation, one in which PVA is grafted with a cationic unsaturated monomer, one in which PVA is reacted with glycidyltrimethylammonium chloride, and one in which PVA is reacted with shrimp chlorhydrin, and then Reacted with alkylene polyamine (Journal of the Chemical Society of Japan 11.1995
(1975)), PVA having a lactone ring was subjected to full action of hydrazine to form a hydrazide (Japanese Patent Publication No. 52-2
3382), PVA with Michael addition of acrylamide and then Hofmann decomposition (Bullet
in of Chemical Soc etyof
Japan, 47 2990 (1974)).
カチオン性ＰＶＡの好ましいカチオン基量としては０．
０１〜２０モル係、重合度２００〜６５００（分子量８
０００〜２０万程度）、ケン化度６５〜１００モル係の
範囲から選択される。The preferred amount of cationic groups in cationic PVA is 0.
01-20 molar ratio, degree of polymerization 200-6500 (molecular weight 8
000 to 200,000) and saponification degree of 65 to 100 molar ratio.
次に本発明の有機凝結剤の使用方法について説明する。Next, a method of using the organic coagulant of the present invention will be explained.
まずカチオン性ＰＶＡを水に溶解させ０．０５〜５ｑｂ
程度の溶成を調製しておく。First, dissolve cationic PVA in water and add 0.05 to 5 qb.
Prepare a certain amount of melting liquid.
ついで被処理懸濁物質を採取して、予備テストによりカ
チオン性ＰＶＡの添加量及び高分子凝集剤の添加量を種
々変化させて最適凝集条件を求める。Next, the suspended matter to be treated is collected, and the amount of cationic PVA and the amount of polymer flocculant added are varied in a preliminary test to find the optimum flocculation conditions.
この最適条件の決定にはジャーテスト、ヌッチェテスト
、上澄液の濁度等の公知の方法により決定される。通常
本発明の有機凝結剤は硫酸パン団やＰＡＯの代替として
使用されるので、添加順序としてはポリアクリルアミｒ
のような高分子凝集剤よりも先に被験液に添加するのが
望ましい。また本発明の有機凝結剤に硫酸バンド、ＰＡ
Ｏ等やＰＨ調節剤を併用させることは何らさしつかえな
い。本発明の有機凝結剤の添加量は懸濁物質の状態、処
理条件等に応じて適宜選択されるが、懸濁液中の固形分
に対して０．００１〜５４量％の範囲から好ましく選ば
れる。The optimum conditions are determined by known methods such as the Jar test, the Nutsche test, and the turbidity of the supernatant. Usually, the organic coagulant of the present invention is used as a substitute for sulfuric acid and PAO, so the addition order is as follows:
It is desirable to add it to the test solution before adding polymer flocculants such as In addition, the organic coagulant of the present invention includes sulfuric acid bandate, PA
There is no problem in using O etc. or a PH regulator together. The amount of the organic coagulant of the present invention to be added is appropriately selected depending on the state of suspended solids, processing conditions, etc., and is preferably selected from the range of 0.001 to 54% by weight based on the solid content in the suspension. It will be done.
（Ｌ：Ｉ）
本発明の有機凝結剤とともに併用される高分子凝集剤と
しては公知のものであれば全て使用可能である。(L:I) Any known polymer flocculant can be used together with the organic flocculant of the present invention.
例えばノニオン、アニオン、カチオン性のポリアクリル
アミｒ１ ポリアクリル酸ソーダ、ポリエチレンオキシ
Ｐ、キトサン、ポリジアリルジメチルアンモニウムノ・
ライド等があげられる。高分子凝集剤の添加量は、懸濁
液中の固形分に対して０．００１〜５重量係、好ましく
は、０．００３〜６重量係の範囲から選ばれる。For example, nonionic, anionic, cationic polyacrylamide r1, sodium polyacrylate, polyethyleneoxy P, chitosan, polydiallyldimethylammonium, etc.
Examples include rides, etc. The amount of the polymer flocculant added is selected from the range of 0.001 to 5 weight percent, preferably 0.003 to 6 weight percent, based on the solid content in the suspension.
尚、本発明の有機凝結剤に使用されるカチオン性ＰＶＡ
は、高分子凝集剤に使用されないかという発想はあるも
のの、硫酸バンドや、ｐＡａ等の無機凝結剤に代わりう
る性能を発揮するということはまったく知られていなか
った。Incidentally, the cationic PVA used in the organic coagulant of the present invention
Although there was an idea that it could be used as a polymer flocculant, it was not known at all that it exhibited performance that could replace inorganic flocculants such as sulfuric acid and pAa.
本発明の有機凝結剤が優れた効果を発現する理論的根拠
は充分明らかではないが、懸濁物質表面に吸着したカチ
オン性ＰＶＡのカチオン基とビニルアルコール成分の水
酸基に基づく二次的結合による懸濁粒子同志の特異的相
互作用による一次フロックの形成の為と推測される。Although the theoretical basis for the excellent effects of the organic coagulant of the present invention is not fully clear, it is believed that the organic coagulant of the present invention exhibits superior effects due to secondary bonds between the cationic groups of the cationic PVA adsorbed on the surface of the suspended solids and the hydroxyl groups of the vinyl alcohol component. It is assumed that this is due to the formation of primary flocs due to specific interactions between turbid particles.
本発明の有機凝結剤は、無機凝結剤の使用量に比較して
極めて少ない蓋で有効に一次フロックを形成させること
ができる。これは無機凝結剤よりもカチオン性ＰＶＡの
分子量の大きいことが寄与していると考えられる。The organic coagulant of the present invention can effectively form a primary floc with a very small amount of caps compared to the amount of inorganic coagulant used. This is thought to be due to the fact that the cationic PVA has a larger molecular weight than the inorganic coagulant.
また、本発明の有機凝結剤によって形成された一次フロ
ックに、さらに高分子凝集剤がフロック間橋架けをおこ
し、二次フロックを形成して粗大化Ｌ、凝集効果が上る
ものと考えられる。Furthermore, it is believed that the polymer flocculant further causes bridging between the flocs in the primary flocs formed by the organic flocculant of the present invention, forming secondary flocs, increasing the coarsening L and flocculation effect.
以下本発明の実施例について説明する。 Examples of the present invention will be described below.
尚、例中特にことわらない限り係は重量係である。In addition, unless otherwise specified in the examples, the section is the weight section.
実施例１
採石上場砂利洗浄排水（ｓｓ；２゜６係、ｐＨ８，０）
を使用して、凝結剤を添加、ついで高分子凝集剤を添加
して凝集処理を行った。結果を表１に示す。Example 1 Quarry listed gravel cleaning wastewater (ss; 2°6, pH 8.0)
A flocculation process was performed by adding a coagulant and then adding a polymer flocculant using the following. The results are shown in Table 1.
実施例２
トンネル工事排水（Ｓ Ｅｌ ： ３９００ ｐｐｍ、
ｐＨ１１，８）を使用して凝結剤を添加ついで高分子凝
集剤を添加して凝集処理を行った。結果を表２に示す。Example 2 Tunnel construction wastewater (S El: 3900 ppm,
A flocculating treatment was performed by adding a coagulant and then adding a polymer flocculant using pH 11.8). The results are shown in Table 2.
蒼１ フロックサイズ二目視により判定した。Blue 1: Determined by second visual observation of floc size.
１ ： ０．３〜０．５舅ｎ 倒立攪拌サイクル２
： ０．５〜０．７５ｍｍ が増えてもフロラ３
； ０．７５〜１．Ｏｎ クサイズの大きい４ ：
１．０〜１．５訂 もの程強度は大き５ ； １
．５〜２．２５酊 い。1: 0.3 to 0.5 n inverted stirring cycle 2
: Even if 0.5 to 0.75 mm increases, Flora 3
; 0.75-1. On large size 4:
1.0 to 1.5 edition The strength is so great 5; 1
．． 5-2.25 drunk.
６ ： ２．２５〜３．Ｏｕ ７ ： ３．０〜４．５１１ ８ ： ４．５〜６．０ｘｘ ９ ： ６．０〜１０．０１１！ 餐２透視度 Ｊ工５Ｋ−０１０２に皐じて行った。6: 2.25-3. Ou 7: 3.0-4.511 8: 4.5~6.0xx 9: 6.0~10.011! Supper 2 visibility I went to J Engineering 5K-0102.
数値が大きくなる程清澄性が優れる。The larger the value, the better the clarity.
（１）従来の無機凝結剤に比較して本発明の有機凝結剤
は使用量が極めて少なく、スラッジ生成量が少くなる。(1) Compared to conventional inorganic coagulants, the amount of the organic coagulant of the present invention used is extremely small, and the amount of sludge produced is reduced.
（２１少ない使用量で優れた沈降性、高いフロック強度
、優れた清澄性を示す。(21) Shows excellent sedimentation, high floc strength, and excellent clarity with a small amount used.
（６）本発明の有機凝結剤からは腐蝕性イオンが発生し
ない。(6) Corrosive ions are not generated from the organic coagulant of the present invention.
（４）無機凝結剤のように一調整用アルカリを添加する
必要がないので作業性が改善できる。(4) Unlike inorganic coagulants, it is not necessary to add alkali for adjustment, so workability can be improved.
Claims (1)
特徴とする有機凝結剤。An organic coagulant characterized by having cationic polyvinyl alcohol as its main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23625286A JPS6391108A (en) | 1986-10-06 | 1986-10-06 | Organic coagulant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23625286A JPS6391108A (en) | 1986-10-06 | 1986-10-06 | Organic coagulant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6391108A true JPS6391108A (en) | 1988-04-21 |
Family
ID=16998028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23625286A Pending JPS6391108A (en) | 1986-10-06 | 1986-10-06 | Organic coagulant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6391108A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227887A (en) * | 2009-03-27 | 2010-10-14 | Nippon Rensui Co Ltd | Wastewater treatment method and wastewater treatment apparatus |
| CN102432091A (en) * | 2011-10-27 | 2012-05-02 | 常州大学 | Preparation method of composite flocculating agent for pretreating blue alga biogas slurry |
-
1986
- 1986-10-06 JP JP23625286A patent/JPS6391108A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227887A (en) * | 2009-03-27 | 2010-10-14 | Nippon Rensui Co Ltd | Wastewater treatment method and wastewater treatment apparatus |
| CN102432091A (en) * | 2011-10-27 | 2012-05-02 | 常州大学 | Preparation method of composite flocculating agent for pretreating blue alga biogas slurry |
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