JPS5870899A - Dehydration of organic sludge - Google Patents
Dehydration of organic sludgeInfo
- Publication number
- JPS5870899A JPS5870899A JP56168742A JP16874281A JPS5870899A JP S5870899 A JPS5870899 A JP S5870899A JP 56168742 A JP56168742 A JP 56168742A JP 16874281 A JP16874281 A JP 16874281A JP S5870899 A JPS5870899 A JP S5870899A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- cationic
- flocculant
- organic
- organic polymer
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 40
- 230000018044 dehydration Effects 0.000 title description 6
- 238000006297 dehydration reaction Methods 0.000 title description 6
- 125000002091 cationic group Chemical group 0.000 claims abstract description 23
- 125000000129 anionic group Chemical group 0.000 claims abstract description 11
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 6
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 6
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 5
- 229920001577 copolymer Polymers 0.000 claims abstract description 3
- 230000003311 flocculating effect Effects 0.000 claims abstract 2
- 229920000620 organic polymer Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 8
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 abstract description 7
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 abstract description 2
- 229920006317 cationic polymer Polymers 0.000 description 9
- 150000001768 cations Chemical class 0.000 description 9
- 239000008394 flocculating agent Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229920006318 anionic polymer Polymers 0.000 description 6
- 208000005156 Dehydration Diseases 0.000 description 5
- 150000001450 anions Chemical class 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000010800 human waste Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 150000003512 tertiary amines Chemical class 0.000 description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 150000001767 cationic compounds Chemical class 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920000831 ionic polymer Polymers 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 229940050176 methyl chloride Drugs 0.000 description 1
- 230000008775 paternal effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は下水、し尿、各種産業排水などを処理する際４
：生じる有機性汚泥の脱水方法に関するものである。Detailed Description of the Invention The present invention provides four methods for treating sewage, human waste, various industrial wastewater, etc.
:Relates to a method for dewatering the organic sludge produced.
従来、都−重下水、し尿、産業排水などの処理で生じた
有機性汚泥は、脱水助剤として塩化第２鉄のような鉄塩
及び消石灰を添加して、真空脱水機あるいは加圧脱水機
により脱水処理されている。Conventionally, organic sludge generated from the treatment of heavy sewage, human waste, industrial wastewater, etc., is processed by adding iron salts such as ferric chloride and slaked lime as dehydration aids, and then processing the organic sludge using a vacuum dehydrator or a pressure dehydrator. It has been dehydrated by
その添加量は、塩化第２鉄では５〜２０１消石灰では１
５〜８０−と多量であり、発生汚泥量の増加や汚泥焼却
時の炉の腐蝕、灰の増加などの問題が生じていた。The amount added is 5 to 20 for ferric chloride and 1 for slaked lime.
The amount was large, ranging from 5 to 80, which caused problems such as an increase in the amount of sludge generated, corrosion of the furnace during sludge incineration, and an increase in ash.
近年、これら諸問題を解決するために、脱水助剤として
各種の有機高分子凝集剤が開発され、遠心分離機、ベル
トプレス型脱水機等と組み合わされて使用されている。In recent years, in order to solve these problems, various organic polymer flocculants have been developed as dehydration aids and are used in combination with centrifugal separators, belt press type dehydrators, and the like.
しかしながら、有機高分子凝集剤を用いる脱水方法にも
多くの欠点がある。例えば、脱水機としてベルトプレス
型を用いる場合には、ｒ布（二対する汚泥の剥離性、固
形物回収率、処理速度尋が充分ではなく、遠心分離機で
も固形物回収率、ケーキ含水率、処理速度等Ｃ二問題が
あり、スクリュープレス型脱水機ではスクリーンからの
汚泥の流出が多く、汚泥喀：充分な圧力が伝わらないた
め、実質的４＝処理不能となるなどの現象が認められて
いる。また、真空脱水機ではＰ布上に有機高分子凝集剤
を添加された汚泥を均一に付着させることは困難であり
、加圧脱水機では脱水ケーキの剥離が困難なため、これ
ら両脱水機（二は有機高分子凝集剤を適用できないとい
う重大な欠陥もある。However, dehydration methods using organic polymer flocculants also have many drawbacks. For example, when using a belt press as a dewatering machine, the removability of sludge, solids recovery rate, and processing speed are not sufficient for R cloth (2), and the solids recovery rate, cake moisture content, and There are C2 problems such as processing speed, and in screw press type dewatering machines, there is a lot of sludge flowing out from the screen, and phenomena such as sludge drainage: Because sufficient pressure is not transmitted, it is practically impossible to process. In addition, with a vacuum dehydrator, it is difficult to uniformly adhere sludge containing an organic polymer flocculant to the P cloth, and with a pressure dehydrator, it is difficult to peel off the dehydrated cake. The second method has a serious drawback in that organic polymer flocculants cannot be applied.
本発明はこれら従来法の賭欠点を解決し、処理速度を高
めると共にケーキ含水率を低下させ、固形物の回収率を
増加させ、かつベルトプレス型脱水機における汚泥の剥
離性を向上させ、あるいはスクリュープレス蓋脱水機Ｉ
：おける汚泥のリークを防止するばかりで青＜、真空ｒ
過積のｆ布への汚泥の付着を均一化すると共（二加圧脱
水機のｒ布からの剥離性も改善し、これら両種脱水機へ
の有機高分子凝集剤の適用を可能（ニする有機性汚泥の
脱水方法を提供することを目的とするものである。The present invention solves the disadvantages of these conventional methods, increases the processing speed, lowers the moisture content of the cake, increases the recovery rate of solids, and improves the peelability of sludge in a belt press type dehydrator. Screw press lid dehydrator I
: It only prevents the leakage of sludge in the tank.
In addition to uniformizing the adhesion of sludge to the overloaded F-cloth (improving the peelability from the R-cloth of the two-pressure dehydrator, it also makes it possible to apply organic polymer flocculants to both types of dehydrators (Ni-pressure dehydrator). The purpose of this invention is to provide a method for dewatering organic sludge.
すなわち本発明は、有機性汚泥Ｃニポリアルキルアミノ
エチルアクリレート、ポリアルキルアミノメタクリレー
ト着しくはこれらとボリアクリルアぽドとの共重合体又
はこれらの第４級アンモニウム塩からなるカチオン性有
機高分子凝集剤を添加混合したのち、ポリアクリル酸ソ
ーダ又はポリアクリルアミドの部分加水分解物からなる
アニオン性有機高分子凝集剤を添加混合して凝集し、機
械脱水することを特徴とする有機性汚泥の脱水方法であ
る。That is, the present invention provides a cationic organic polymer flocculant consisting of organic sludge C, polyalkylaminoethyl acrylate, polyalkylaminomethacrylate, a copolymer of these with polyacryl apod, or a quaternary ammonium salt thereof. A method for dewatering organic sludge, which is characterized by adding and mixing anionic organic polymer flocculants made of sodium polyacrylate or partial hydrolyzate of polyacrylamide, coagulating, and mechanically dewatering the sludge. be.
以下に本発明の詳細な説明すると、前述した様に、有機
性物質を多量に含有する汚泥シ：有機高分子凝集剤を添
加し汚泥中の固形分を凝集させた後５二、遠心脱水機、
ベルトプレス型脱水機、スクリュープレス型脱水機等で
脱水処理する場合、処理効果を低下させている原因のう
ち大きなものは、有機高分子凝集剤を添加混合した時に
生成するフロックの性状である。すなわち生成するフロ
ックの密度が低く、強度が小さく、脱水性（透水性）が
悪いことによる。また、真空脱水機では生成するフロッ
クが大きすぎることも原因である。従って、生成するフ
ロックのこれらの性状を改良すれば、前述の欠点を解決
することができる。A detailed explanation of the present invention will be given below.As mentioned above, sludge containing a large amount of organic substances: After adding an organic polymer flocculant to flocculate the solid content in the sludge, a centrifugal dehydrator is used. ,
When dehydrating with a belt press type dehydrator, screw press type dehydrator, etc., one of the major reasons for reducing the treatment effect is the properties of flocs that are generated when an organic polymer flocculant is added and mixed. That is, the density of the generated flocs is low, the strength is low, and the dewatering property (water permeability) is poor. Another cause is that the flocs produced in the vacuum dehydrator are too large. Therefore, the above-mentioned drawbacks can be overcome by improving these properties of the produced flocs.
本発明者らは、この点に着目しフロックの性状を改良す
るべく種々の実験を行なった結果、汚泥に分子量１万〜
１００万、カチオン強度３．５ｍｅｑ／ｆボ９ｗ以上の
組成を持つカチオンポリマを添加混合した後、ポリアク
リル酸ソーダもしくはポリアクリルアミドの部分加水分
解物からなるアニオンポリマを添加して攪拌すると１、
密度が大で、強度の大きい脱水性の良いフロックが生成
することを見い出した。The present inventors focused on this point and conducted various experiments to improve the properties of flocs.
After adding and mixing a cationic polymer having a composition of 1,000,000 and a cationic strength of 3.5 meq/f and a composition of 9W or more, adding an anionic polymer consisting of a partial hydrolyzate of sodium polyacrylate or polyacrylamide and stirring.
It has been found that flocs with high density, high strength, and good dehydration properties are produced.
従来より、２種のイオン性を持つ高分子凝集剤を併用す
る凝集方法は行なわれていなかったわけではない。例え
ば、有機性汚泥にアニオンポリマを添加した後、カチオ
ンポリマを−加えて凝集させると高分子凝集剤の使用量
が低減できることが知られており（特公１＠３９−１７
４９２ ） 、また、特に無機系の汚泥を処理する際Ｃ
ニアニオン性有機高分子凝集剤とカチオン性有機高分子
凝集剤またはカチオン性無機凝集剤を併用することも知
られている（％開昭５Ｏ−１１０９７２）。しかしなが
ら、本発明の様なカチオン性有機高分子凝集剤とアニオ
ン性有機高分子凝集剤の組み合わせと、添加順序が有機
性汚泥の脱水に特に効果的であることは全く知られてい
がい。Conventionally, flocculation methods using two types of ionic polymer flocculants in combination have not been practiced. For example, it is known that the amount of polymer flocculant used can be reduced by adding an anionic polymer to organic sludge and then adding a cationic polymer to coagulate it (Japanese Patent Publication No. 1@39-17
492), and especially when treating inorganic sludge, C
It is also known to use a near-anionic organic polymer flocculant together with a cationic organic polymer flocculant or a cationic inorganic flocculant (% 1989-110972). However, it is completely unknown that the combination of a cationic organic polymer flocculant and anionic organic polymer flocculant as in the present invention and the order of addition are particularly effective for dewatering organic sludge.
本発明において用いられるカチ、オン性凝集剤としては
、分子量１万〜１００万、カチオン強度３．５ｍ＠ｑ／
ｆｙｔ１９マ以上の組成を持つポリアルキルア＜／エチ
ルアクリレート、ポリアルキルアミノメタクリレート、
もしくはこれらとポリアクリルアミドのカチオン変性物
、又はこれらの第４級アンモニウム塩などがあげられる
。The cationic flocculant used in the present invention has a molecular weight of 10,000 to 1,000,000 and a cationic strength of 3.5 m@q/
polyalkyl acrylate, polyalkylamino methacrylate, having a composition of fyt19 or more;
Alternatively, cationic modified products of these and polyacrylamide, or quaternary ammonium salts thereof may be mentioned.
ここで注意すべきことは、従来からカチオンポリマとし
て用いられている上記化学構造のポリマは、分子量が３
００万〜７００万と大きいものであり本発明の如きアニ
オンとの併用時（二は効果を発揮しない点である。カチ
オンポリマの分子量を限定し、さらにアニオンポリマを
限定して組み合せて、はじめて顕著な効果が生じる。What should be noted here is that the polymer with the above chemical structure, which has been conventionally used as a cationic polymer, has a molecular weight of 3.
000,000 to 7,000,000,000,000 to 7,000,000,000,000,000,000,000,000,000,000,000,000. effect.
また、最適添加量は、有機性汚泥の性状やカチオンポリ
マの組成によって大幅に変動するため一概喀：は規定で
きないので、実際の汚泥（二ついて予備試験Ｃ二より決
定するのが最も確実である。カチオンポリマの添加量が
多い程ケーキ含水率が低下するが、処理コストも上昇す
るので、一般的（二は汚泥乾燥固形物あたり、ポリマ乾
燥物で０．１１以上好ましくは０．５〜１０９６程度が
選ばれる。In addition, since the optimum amount to be added varies greatly depending on the properties of the organic sludge and the composition of the cationic polymer, it cannot be determined in general terms. The cake moisture content decreases as the amount of cationic polymer added increases, but the treatment cost also increases, so generally (2 is 0.11 or more per dry solid of sludge, preferably 0.5 to 1096 per dry polymer) The degree is chosen.
本発明で用いられるアニオン性凝集剤の化学構アニオン
強度（−ｙ−で示される）２分子量（ｇ。Chemical structure of the anionic flocculant used in the present invention Anionic strength (indicated by -y-)2 Molecular weight (g.
ｘ −）−ｙ
ｙ及びルで決まる）を汚泥性状、脱水機型式によって適
宜選択する必要がある。一般的（＝は、アニオン強度が
大きい１ケーキ含水率は低くなり、分子量が大きい程フ
ロックが大きく、かつ含水率が若干増加する傾向１二あ
る。ふつう−”−が０．２以上。x-)-y (determined by y and l) must be selected appropriately depending on the sludge properties and dehydrator type. Generally (= indicates a cake with a high anionic strength), the water content tends to be low, and the larger the molecular weight, the larger the floc, and the water content tends to increase slightly.12. Usually -"- is 0.2 or more.
ｘ十ｙ
分子量が５００万〜１０００万程度のものを、０．０５
〜５９１（汚泥乾燥固形物あたり）、添加するとよい。x 10y The molecular weight is about 5 million to 10 million, 0.05
~591 (per sludge dry solids) is preferably added.
カチオン性凝集剤とアニオン性凝集剤の添加順序は非常
に重要であり、カチオン性凝集剤を最初に添加し充分混
合した後、アニオン性凝集剤を添加しゆるやかに混合し
てフロックを形成させる必要がある。同時Ｃ二添加した
り添加順序を逆（；すると、効果は着しく減少する。The order of addition of the cationic flocculant and anionic flocculant is very important; it is necessary to add the cationic flocculant first and mix thoroughly, then add the anionic flocculant and mix gently to form flocs. There is. If C2 is added at the same time or the order of addition is reversed, the effect will decrease considerably.
本発明１；おいて生じている現象の機構は必ずしも明ら
かではないが、汚泥粒子表面が陰性に帯電していること
、カチオン性凝集剤を最初（ユ添加しなければ効果がな
いこと、カチオン性凝集剤を添加すればする鵬ケーキ含
水率が下がること１等の現象から軛合判断すると、カチ
オン性有機高分子凝集剤の添加につれて有機性汚泥粒子
が変性して粒子中の水の含有量が低下し、表面電位が陽
性（；転じ、次いで添加されたアニオン性有機高分子凝
集剤と強固に反応するものと考えられる。しかしながら
、本発明に示した組み合わせの効果が他のアニオン、カ
チオンの組み合わせと比べて特に顕著である理由は、現
在のところ不明である。The mechanism of the phenomenon occurring in Invention 1 is not necessarily clear, but it is important to note that the surface of the sludge particles is negatively charged, that there is no effect unless a cationic flocculant is first added, and that the cationic If a flocculant is added, the moisture content of the cake decreases.Judging from the phenomenon of 1), as the cationic organic polymer flocculant is added, the organic sludge particles are denatured and the water content in the particles is reduced. It is thought that the effect of the combination shown in the present invention is lower than that of the combination of other anions and cations. The reason why this is particularly noticeable compared to is currently unknown.
以上述べたように本発明によれば、生じるフロックは轡
度が大きく、強度が大きく脱水性が良く、またフロック
粒度な適宜調整できる−ので、ベルトプレス型脱水機で
は脱水ケーキの剥離性が良く含水率が低下し、スクリュ
ープレス型脱水機ではスクリーンからの汚泥のリーク量
が減少し含水率が低下する。また、遠心分離機では回収
率が向上し処理能力が増加し含水率が低下するなどの効
果が認められる。さらに、従来、高分子凝集剤の適用が
不可能とされていた真空濾過機及び加圧濾過機Ｃ二も高
分子凝集剤の適用が可能となるなどの多大な効果が認め
られる。As described above, according to the present invention, the flocs produced have a large degree of filtration, are strong, and have good dewatering properties, and the floc particle size can be adjusted as appropriate. Therefore, in a belt press type dehydrator, the peelability of the dehydrated cake is good. The water content decreases, and in screw press dehydrators, the amount of sludge leaking from the screen decreases, and the water content decreases. In addition, centrifugal separators have been shown to improve recovery rates, increase processing capacity, and reduce water content. Furthermore, great effects have been recognized, such as the fact that polymer flocculants can now be applied to vacuum filtration machines and pressure filtration machines C2, which were previously considered impossible to apply polymer flocculants to.
以下Ｃ二、本発明の詳細な説明する。Below, in C2, the present invention will be explained in detail.
実施例１
低希釈２段活性汚泥法に３次処理を組み合わせた処理を
行なっているし尿処理場から排出される余剰活性汚泥（
ｐＨ６，９、濃度１５ ｆ／ｌ 、強熱減量８〇−）に
、カチオンポ９ｗを添加混合した後、遠心分離機に流入
させ、機内に設けた注入管よりアニオンポリマを添加し
て脱水処理を行なった。Example 1 Surplus activated sludge (
After adding and mixing 9W of cationic polymer to the mixture (pH 6.9, concentration 15 f/l, loss on ignition 80-), the mixture was flowed into a centrifuge, and the anionic polymer was added through an injection tube installed inside the machine for dehydration treatment. I did it.
本発明方法１二用いたカチオンポリマは、ポリジメチル
アミノメタクリレートを塩化メチル（二て４級アン千ニ
ウム塩としたもの（カチオンＡと呼ぶ）で、カチオン強
度は４．８ ｍｅｑ／ｆポリマであり重合度を変えて種
々の分子量を持つ様に調製したものである０また、ポリ
ジメチルアミノメタクリレート（３級アミン、カチオン
Ｂと呼ぶ）、ポリジェチルアミノエチルアクリレート（
３級アミン、カチオンＣと呼ぶ）、同４級アンモニウム
塩（カチオンＤと呼ぶ）も用いた。一方、アニオンポリ
マとしては、ボリアクリルア２ドの部分加水分解物（加
水分解度５０ｍｏ１９Ｇ、分子量６００万アニオンＡと
呼ぶ）を用いた。結果を第１１ｐ、に示す。The cationic polymer used in Method 12 of the present invention was polydimethylaminomethacrylate converted into methyl chloride (secondary quaternary amthunium salt (referred to as cation A), and the cationic strength was 4.8 meq/f polymer. In addition, polydimethylaminomethacrylate (tertiary amine, called cation B), polyjethylaminoethyl acrylate (tertiary amine, called cation B), which are prepared with various molecular weights by changing the degree of polymerization.
A tertiary amine (referred to as cation C) and a quaternary ammonium salt (referred to as cation D) were also used. On the other hand, as the anionic polymer, a partially hydrolyzed product of polyacrylamide (degree of hydrolysis: 50 mo19G, molecular weight: 6 million, referred to as anion A) was used. The results are shown on page 11.
第１表
第１表の結果より、カチオンポリマの分子量が１万〜１
００万、カチオン強度が３．５ｍｅｑ／ｆ以上の条件を
満足すると、汚泥処理量が増大し、ＳＳ回収率が増し、
ケーキ含水率が低下することがわかる。Table 1 From the results in Table 1, the molecular weight of the cationic polymer is 10,000 to 1.
When the cationic strength satisfies the conditions of 3.5 meq/f or more, the amount of sludge treated increases, the SS recovery rate increases,
It can be seen that the cake moisture content decreases.
実施例２
某都市下水処理場から排出される余剰汚泥（ｐＨ６，６
，濃［２１５９／Ａ、強熱減量８０−）を、ロールプレ
ス型脱水機で処理した。Example 2 Excess sludge (pH 6.6) discharged from a certain urban sewage treatment plant
, concentrated [2159/A, loss on ignition 80-) was processed in a roll press type dehydrator.
本発明方法で用いたポ９ｗは実施例１のカチオンＡ（分
子量父方）及び、ポリアクリル酸ソーダ（分子量６００
万、アニオンＢと呼ぶ）である。添加量、添加順序の影
譬を検討した結果を第２表（＝示す。Po9w used in the method of the present invention was cation A of Example 1 (molecular weight paternal) and sodium polyacrylate (molecular weight 600).
10,000, called anion B). Table 2 shows the results of examining the effects of addition amount and order of addition.
第２表
第２表の結果より、カチオンポリマを０．１ Ｓ以上、
好ましくは０．５〜１０チ添加し、アニオンポリマを０
．０５ ％ −１５Ｑ ％添加するときわめて良好な結
果が得られること、また添加順序はカチオン、アニオン
の順が重要であることが明らかである。From the results in Table 2, it is clear that the cationic polymer is 0.1 S or more,
Preferably 0.5 to 10 t is added, and the anionic polymer is added to 0.
．． It is clear that very good results can be obtained by adding 05% to 15Q%, and that the order of addition is important: cation and anion.
実施例３
嫌気性消化法Ｃ：より処理しているし尿処理場より排出
される余剰汚泥（ｐＨ７，２、濃度３．０１！、強熱減
量６８饅）を用い、各種脱水機を用いて脱水試験を行な
った。Example 3 Anaerobic Digestion Method C: Excess sludge discharged from a human waste treatment plant (pH 7.2, concentration 3.01!, loss on ignition 68) was dehydrated using various dehydrators. I conducted a test.
本発明方法には実施例１で示したカチオン人（分子量５
０万）を用い、アニオンポリマとしてはポリアクリルア
ンドの部分加水分解物（加水分解度加ｍｏｌ −、分子
量９００万、アニオンＣと呼ぶ）を用いた。比較例とし
て、ポリジメチルアｔノメタクリレートの４級アンモニ
ウム塩（分子量７００万カチオンＸと呼ぶ）を用いた。The method of the present invention includes the cationic compound shown in Example 1 (molecular weight 5
0,000,000), and as the anionic polymer, a partially hydrolyzed product of polyacryland (hydrolysis degree mol -, molecular weight 9,000,000, referred to as anion C) was used. As a comparative example, a quaternary ammonium salt of polydimethylatnomethacrylate (referred to as cation X with a molecular weight of 7 million) was used.
結果を第３表に示す。The results are shown in Table 3.
第３表
第３表より従来法では処理不能であるのに対し、３８Ｉ
の脱水機が、いずれも本発明方法Ｃ二よって適用可能で
あることがわかる。Table 3 Table 3 shows that 38I cannot be treated with conventional methods, but
It can be seen that any of the above dehydrators can be applied by method C2 of the present invention.
特許出願人 荏原インフィルコ株式会社代理人弁理士
端 山 五 −
同 弁理士 千 １） 稔Patent applicant: Patent attorney representing Ebara Infilco Co., Ltd.
Go Hayama - Patent attorney Sen 1) Minoru
Claims (1)
ト、ポリアルキルアミノメタクリレート若しくはこれら
とポリアクリルアミドとの共重合体又はこれらの第４級
アンモニウム塩からなるカチオン性有機高分子凝集剤を
添加混合したのち、ポリアクリル酸ソーダ又はポリアク
リルアミドの部分加水分解物からなるアニオン性有機高
分子凝集剤を添加混合して凝集し、横槍脱水することを
特徴とする有機性汚泥の脱水方法。 ２、前記カチオン性有機高分子凝集剤として、分子量１
万〜１００万、カチオン強度３．５（ミリグラム当量／
グラムーリマ）以上のものを使用する特許請求の範囲第
１項記載の方法。 五 前記カチオン性有機高分子凝集剤の添加率が、有機
性汚泥の乾燥固形物あたり０．１１以上。 好ましくは０．５〜１０−である特許請求の範囲ｉＩ１
項又は第２項記載の方法。 ４ 前記アニオン性有機高分子凝集剤の添加率が、有橋
性汚泥の乾燥固形物あたり０．０５〜５−である特許請
求の範囲第１項、第２項又は第３項記載の方法。[Claims] t. Addition of a cationic organic polymer flocculant consisting of polyalkylaminoethyl acrylate, polyalkylaminomethacrylate, a copolymer of these with polyacrylamide, or a quaternary ammonium salt thereof to organic sludge. A method for dewatering organic sludge, which comprises mixing, adding and mixing an anionic organic polymer flocculant consisting of a partial hydrolyzate of sodium polyacrylate or polyacrylamide, flocculating the mixture, and performing horizontal dewatering. 2. The cationic organic polymer flocculant has a molecular weight of 1
10,000 to 1,000,000, cationic strength 3.5 (milligram equivalent/
2. The method according to claim 1, wherein the method uses at least one of the following: (v) The addition rate of the cationic organic polymer flocculant is 0.11 or more per dry solid matter of the organic sludge. Claim iI1 preferably from 0.5 to 10-
or the method described in paragraph 2. 4. The method according to claim 1, 2, or 3, wherein the addition rate of the anionic organic polymer flocculant is 0.05 to 5-5% of the dry solids of the bridged sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56168742A JPS5870899A (en) | 1981-10-23 | 1981-10-23 | Dehydration of organic sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56168742A JPS5870899A (en) | 1981-10-23 | 1981-10-23 | Dehydration of organic sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5870899A true JPS5870899A (en) | 1983-04-27 |
Family
ID=15873567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56168742A Pending JPS5870899A (en) | 1981-10-23 | 1981-10-23 | Dehydration of organic sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5870899A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60166100A (en) * | 1984-02-08 | 1985-08-29 | Kurita Water Ind Ltd | Dehydrating method of sludge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687500A (en) * | 1979-12-20 | 1981-07-16 | Japan Organo Co Ltd | Dehydration of sludge |
| JPS57130600A (en) * | 1981-02-07 | 1982-08-13 | Kurita Water Ind Ltd | Dehydration of sludge |
| JPS57132599A (en) * | 1981-02-09 | 1982-08-16 | Kurita Water Ind Ltd | Dehydrating method for excess sludge |
| JPS57135099A (en) * | 1981-02-13 | 1982-08-20 | Kurita Water Ind Ltd | Sludge-dewatering method |
-
1981
- 1981-10-23 JP JP56168742A patent/JPS5870899A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687500A (en) * | 1979-12-20 | 1981-07-16 | Japan Organo Co Ltd | Dehydration of sludge |
| JPS57130600A (en) * | 1981-02-07 | 1982-08-13 | Kurita Water Ind Ltd | Dehydration of sludge |
| JPS57132599A (en) * | 1981-02-09 | 1982-08-16 | Kurita Water Ind Ltd | Dehydrating method for excess sludge |
| JPS57135099A (en) * | 1981-02-13 | 1982-08-20 | Kurita Water Ind Ltd | Sludge-dewatering method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60166100A (en) * | 1984-02-08 | 1985-08-29 | Kurita Water Ind Ltd | Dehydrating method of sludge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0536194B1 (en) | Purification of aqueous liquor | |
| JPH06239B2 (en) | Dewatering method of organic sludge | |
| JPH10249398A (en) | Method for dehydrating sludge | |
| JPS6352527B2 (en) | ||
| JPH0390000A (en) | Sludge treatment | |
| JPS5949078B2 (en) | Sludge treatment method | |
| JPS6054797A (en) | Treatment of sludge | |
| JPS5870899A (en) | Dehydration of organic sludge | |
| JP3305688B2 (en) | Polymer flocculant, method for producing the same, and method for dehydrating organic sludge | |
| JPS5841919B2 (en) | Sludge dewatering method | |
| JP2991588B2 (en) | Method for dewatering sludge containing calcium compound | |
| JPH10249399A (en) | Method for dehydrating sludge | |
| JPS62156000A (en) | Treatment of oil-containing sludge | |
| JPH0924400A (en) | Method for dehydrating digested sludge | |
| JPS6125700A (en) | Dehydrating method of organic sludge | |
| JPS62279812A (en) | Flocculating method for suspended substance | |
| JP2003033604A (en) | Waste water treatment agent | |
| JPH0130560B2 (en) | ||
| JPH0118800B2 (en) | ||
| JP2008080278A (en) | Flocculation method of highly hydratable sludge | |
| JPS6125699A (en) | Dehydrating method of organic sludge | |
| JPS63240999A (en) | Dehydration of organic sludge | |
| EP0082571B1 (en) | A method for clarifying coal liquors with water-soluble, high molecular weight polymers having low concentration of cationic moieties | |
| WO1993002968A1 (en) | Dewatering of aqueous suspensions | |
| JPS5919760B2 (en) | Sludge treatment method |