JPH1199393A - Treatment of muddy water - Google Patents
Treatment of muddy waterInfo
- Publication number
- JPH1199393A JPH1199393A JP9279577A JP27957797A JPH1199393A JP H1199393 A JPH1199393 A JP H1199393A JP 9279577 A JP9279577 A JP 9279577A JP 27957797 A JP27957797 A JP 27957797A JP H1199393 A JPH1199393 A JP H1199393A
- Authority
- JP
- Japan
- Prior art keywords
- muddy water
- heat
- liquid
- treatment
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、泥水の凝集処理
に、天然有機物由来の安価で環境に優しい凝集剤を使用
する泥水処理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 muddy water, which uses an inexpensive and environmentally friendly flocculant derived from natural organic substances for the treatment of muddy water.
【０００２】[0002]
【従来の技術】従来、シールド掘削機などから排出され
る泥水の凝集処理には、無機系の凝集剤及び有機系の高
分子凝集剤が併用されている。従来の泥水処理は、泥水
に、無機系の凝集剤及び有機系の高分子凝集剤を添加し
て、凝集沈降した沈殿物を上澄液から分離する方法であ
る。無機系の凝集剤としては、ポリ塩化アルミニウム
（ＰＡＣ）、硫酸アルミニウム、塩化第二鉄等が知られ
ており、有機系の合成高分子凝集剤としては、アクリル
アミドとアクリル酸の共重合物、ポリアクリルアミドの
加水分解物等が知られている。2. Description of the Related Art Conventionally, an inorganic coagulant and an organic polymer coagulant are used together in coagulation treatment of muddy water discharged from a shield excavator or the like. The conventional muddy water treatment is a method in which an inorganic coagulant and an organic polymer coagulant are added to muddy water, and a sedimented sediment is separated from a supernatant. As inorganic coagulants, polyaluminum chloride (PAC), aluminum sulfate, ferric chloride and the like are known, and as organic synthetic polymer coagulants, copolymers of acrylamide and acrylic acid, Acrylamide hydrolyzate and the like are known.
【０００３】また、特開平８−２１５６８６号公報に
は、カチオン性多糖類及びアニオン性高分子化合物を泥
水に添加して凝集処理を行う方法が記載されており、泥
水に添加するカチオン性多糖類としては、デンプンにカ
チオン化剤を反応させて得られるカチオン化デンプンが
好適であると記載されている。また、特開昭５５−２１
４６５号公報には、泥水を用いて掘削等の工事を行う泥
水工法において、泥水の増粘剤として天然種子多糖類を
添加して工事を行った後、泥水を含む廃液にさらに前記
天然種子多糖類を添加して泥水の凝集処理を行う方法が
記載されており、泥水に添加する天然種子多糖類として
は、グアーガム、ローカストビーンガム、クインスシー
ドガム、タラガムが好適であると記載されている。な
お、食品廃棄物や農産廃棄物等として排出され、処理に
困っている固形物及び廃液を、天然有機物由来の凝集剤
として有効利用するという技術は、どこにも見あたらな
い。JP-A-8-215686 discloses a method in which a cationic polysaccharide and an anionic polymer compound are added to muddy water to carry out a coagulation treatment, and the cationic polysaccharides added to muddy water are described. It is described that cationized starch obtained by reacting a cationizing agent with starch is suitable. Also, Japanese Patent Application Laid-Open No. 55-21 / 1979
No. 465 discloses that in a muddy construction method in which construction such as excavation is performed using muddy water, a natural seed polysaccharide is added as a thickening agent for the muddy water and the construction is carried out. A method of coagulating muddy water by adding saccharides is described, and it is described that guar gum, locust bean gum, quince seed gum, and cod gum are suitable as natural seed polysaccharides to be added to muddy water. It should be noted that there is no technology for effectively utilizing solids and waste liquids that are discharged as food waste or agricultural waste and are in trouble for disposal as coagulants derived from natural organic substances.
【０００４】[0004]
【発明が解決しようとする課題】上記のように、従来の
泥水処理では、泥水に添加する凝集剤として、無機系の
凝集剤及び有機系の高分子凝集剤が併用されているが、
いずれも価格が高く、泥水処理コストを大幅に引き上げ
る要因となっている。また、高分子凝集剤は固体で供給
されることが多いので、泥水への溶解方法が難しく、高
分子凝集剤溶解槽等の特有の溶解装置が必要となる。さ
らに、高分子凝集剤は生物分解され難く、泥水の凝集処
理物（凝集汚泥）の中に長期間残留するので、凝集処理
物の脱水ケーキ等が処分された場所で、新たに土壌汚染
や水質汚染を起こす懸念がある。As described above, in the conventional muddy water treatment, an inorganic coagulant and an organic polymer coagulant are used in combination as the coagulant added to the muddy water.
All of them are expensive and cause drastic increase of muddy water treatment cost. In addition, since the polymer flocculant is often supplied as a solid, a method for dissolving it in muddy water is difficult, and a specific dissolving device such as a polymer flocculant dissolving tank is required. Furthermore, the polymer flocculant is difficult to biodegrade and remains in the coagulated sludge (coagulated sludge) for a long period of time. There is a risk of contamination.
【０００５】また、特開平８−２１５６８６号公報記載
の方法は、デンプン等の多糖類に、ハロゲン化アルキル
四級アンモニウム塩やグリシジル四級アンモニウム塩等
のカチオン化剤を反応させて得られるカチオン性多糖類
を凝集剤として用いるものであるが、多糖類をカチオン
化させて用いる必要があるので、カチオン性多糖類を作
製する作業が煩雑であり、また、泥水処理コストが高く
なるという問題がある。また、特開昭５５−２１４６５
号公報記載の方法は、一般に食品や化粧品に添加される
天然粘質物であるグアーガム、ローカストビーンガム等
の天然種子多糖類を凝集剤として用いるものであるが、
これらの天然種子多糖類は価格が高く、泥水処理コスト
を大幅に引き上げることになる。The method described in Japanese Patent Application Laid-Open No. Hei 8-215686 discloses a method in which a polysaccharide such as starch is reacted with a cationizing agent such as an alkyl quaternary ammonium salt or a glycidyl quaternary ammonium salt. Although a polysaccharide is used as a flocculant, it is necessary to cationize the polysaccharide and use it, so that the operation of preparing a cationic polysaccharide is complicated, and the muddy water treatment cost increases. . Also, Japanese Patent Application Laid-Open No. 55-21465.
The method described in Japanese Patent Application Publication No. H10-216, in which guar gum, which is a natural viscous substance generally added to foods and cosmetics, uses natural seed polysaccharides such as locust bean gum as a flocculant,
These natural seed polysaccharides are expensive and significantly increase mud treatment costs.
【０００６】本発明は上記の諸点に鑑みなされたもの
で、本発明の目的は、安価で生物分解性に優れた天然有
機物の加熱処理液を泥水の凝集剤として使用することに
より、泥水処理コストを大幅に引き下げることができ、
凝集処理した後の凝集汚泥（泥土）を土壌等に還元して
も土壌汚染や水質汚染を起こすおそれがなく、しかも、
凝集処理後排出処分される脱水ケーキ等に肥効成分が混
入するため土壌としての有効利用が図れ、また、従来必
要であった高分子凝集剤溶解槽等の設備が不要となる泥
水処理方法を提供することにある。また、本発明の目的
は、食品廃棄物や農産廃棄物等として排出され、処理に
困っている固形物又は／及び廃液を、天然有機物由来の
凝集剤として有効利用することにより、極めて安価で環
境に優しい凝集剤を用いた泥水処理方法を提供すること
にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to use a heat treatment liquid of a natural organic material which is inexpensive and has excellent biodegradability as a flocculant for muddy water to reduce the cost of muddy water treatment. Can be significantly reduced,
Even if the coagulated sludge (mud) after the coagulation treatment is reduced to soil or the like, there is no risk of causing soil pollution or water pollution, and
A muddy water treatment method that eliminates the need for equipment such as a polymer flocculant dissolution tank, which was conventionally required, because fertilizing components are mixed into dewatered cakes and the like discharged after flocculation treatment and can be used effectively as soil. To provide. Further, an object of the present invention is to provide an extremely inexpensive and environmentally friendly method by effectively utilizing solids and / or effluents that are discharged as food waste or agricultural waste and are difficult to treat as a coagulant derived from natural organic substances. It is to provide a muddy water treatment method using a coagulant which is easy to use.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の泥水処理方法は、天然有機物の加熱処理
液を、凝集剤として泥水に添加して泥水の凝集処理を行
うことを特徴としている（図１、図２参照）。また、本
発明の方法は、天然有機物の加熱処理液を、凝集剤とし
て泥水に添加して、この泥水を撹拌した後、凝集沈殿さ
せて沈殿物（凝集汚泥）と上澄液とに分離することを特
徴としている（図１、図２参照）。また、本発明の方法
は、天然有機物の加熱処理液を、凝集剤として泥水に添
加して、この泥水を急速撹拌し、ついで、緩速撹拌した
後、凝集沈殿させて沈殿物（凝集汚泥）と上澄液とに分
離し、沈殿物（凝集汚泥）を脱水処理して脱水ケーキと
脱水液とに分離することを特徴としている（図１参
照）。なお、上澄液を脱水液とともに水処理する場合も
ある。泥水の急速撹拌工程では、泥水と凝集剤との混合
を促進させる観点等から、８０〜２００rpm程度の撹拌
速度で１０秒間〜５分間程度撹拌することが望ましく、
また、泥水の緩速撹拌工程では、泥水の凝集沈殿を促進
させる観点等から、１０〜７０rpm程度の撹拌速度で５
分間〜１時間程度撹拌することが望ましい。Means for Solving the Problems To achieve the above object, the muddy water treatment method of the present invention comprises adding a heat treatment liquid of a natural organic substance to the muddy water as a coagulant to perform the coagulation treatment of the muddy water. (See FIGS. 1 and 2). In the method of the present invention, a heat treatment liquid of a natural organic substance is added to muddy water as a flocculant, and after stirring this muddy water, it is coagulated and settled to be separated into a precipitate (coagulated sludge) and a supernatant liquid. (See FIGS. 1 and 2). In the method of the present invention, a heat treatment liquid of a natural organic substance is added to muddy water as a flocculant, the muddy water is rapidly stirred, and then slowly stirred, and then coagulated and precipitated to form a sediment (coagulated sludge). And a supernatant liquid, and the sediment (agglomerated sludge) is dehydrated to separate it into a dehydrated cake and a dehydrated liquid (see FIG. 1). In some cases, the supernatant is treated with water together with the dehydrated liquid. In the step of rapidly stirring muddy water, it is desirable to stir at a stirring speed of about 80 to 200 rpm for about 10 seconds to 5 minutes from the viewpoint of promoting mixing of the muddy water and the flocculant,
Further, in the muddy water agitation step, from the viewpoint of promoting the coagulation and sedimentation of the muddy water, the stirring speed is about 10 to 70 rpm.
It is desirable to stir for about 1 minute to 1 hour.
【０００８】上記の本発明の方法において、食品廃棄物
及び農産廃棄物の少なくともいずれかの固形物（粉状
物、粒状物等も含む）を水存在下で加熱処理して得られ
る加熱処理液を、天然有機物由来の凝集剤として泥水に
添加することが望ましい。また、上記の本発明の方法に
おいて、食品廃棄物及び農産廃棄物の少なくともいずれ
かの固形物（粉状物、粒状物等も含む）を水存在下で加
熱処理して加熱処理液を得、この加熱処理液から少なく
とも粗大粒子を除去した溶液を、天然有機物由来の凝集
剤として泥水に添加することが望ましい。この場合、加
熱処理液から粗大粒子（大粒径固形物）のみを除去し
て、微細粒子が混入した溶液を凝集剤として利用するこ
とができる。ただし、完全に微粒子を除去した溶液を凝
集剤として利用することも可能である。また、加熱処理
液から粗大粒子（及び微細粒子）を除去する手段として
は、除去する粒子の粒径等に応じて、フルイ、ろ紙、精
密ろ過膜（ＭＦ膜）等によるろ過等が用いられる。上記
の食品廃棄物、農産廃棄物としては、下記に示すよう
な、穀類の脱穀粕、植物の抽出粕、植物の絞り粕等が一
例として挙げられる。また、上記の本発明の方法におい
て、食品廃棄物及び農産廃棄物の少なくともいずれかと
して排出される加熱処理廃液を、天然有機物由来の凝集
剤として泥水に添加することが望ましい。この場合の加
熱処理廃液としては、一例として、大豆煮汁等が挙げら
れる。[0008] In the above method of the present invention, a heat-treated liquid obtained by heat-treating at least one of solids (including powders, granules, etc.) of food waste and agricultural waste in the presence of water Is desirably added to muddy water as a coagulant derived from natural organic matter. Further, in the above method of the present invention, a heat-treated liquid is obtained by heat-treating at least one of food waste and agricultural waste solids (including powders, granules and the like) in the presence of water, It is desirable to add a solution obtained by removing at least coarse particles from the heat treatment liquid to muddy water as a coagulant derived from a natural organic substance. In this case, only the coarse particles (large-diameter solids) are removed from the heat treatment liquid, and the solution mixed with the fine particles can be used as a coagulant. However, a solution from which fine particles have been completely removed can be used as a flocculant. In addition, as a means for removing coarse particles (and fine particles) from the heat treatment liquid, filtration using a sieve, filter paper, a microfiltration membrane (MF membrane), or the like is used according to the particle size of the particles to be removed. Examples of the above-mentioned food waste and agricultural waste include, as shown below, cereal threshing lees, plant extracted lees, plant lees, and the like. In the method of the present invention described above, it is desirable to add the heat-treated waste liquid discharged as at least one of food waste and agricultural waste to muddy water as a coagulant derived from a natural organic substance. As an example of the heat treatment waste liquid in this case, soybean broth or the like can be given.
【０００９】また、上記の本発明の方法において、穀
類、穀類の脱穀粕、植物の抽出粕及び植物の絞り粕の少
なくともいずれかを水存在下で加熱処理して得られる加
熱処理液を、天然有機物由来の凝集剤として泥水に添加
することが望ましい。また、上記の本発明の方法におい
て、穀類、穀類の脱穀粕、植物の抽出粕及び植物の絞り
粕の少なくともいずれかを水存在下で加熱処理して加熱
処理液を得、この加熱処理液から少なくとも粗大粒子を
除去した溶液を、天然有機物由来の凝集剤として泥水に
添加することが望ましい。この場合、加熱処理液から粗
大粒子（大粒径固形物）のみを除去して、微細粒子が混
入した溶液を凝集剤として利用することができる。ただ
し、完全に微粒子を除去した溶液を凝集剤として利用す
ることも可能である。また、加熱処理液から粗大粒子
（及び微細粒子）を除去する手段としては、除去する粒
子の粒径等に応じて、フルイ、ろ紙、精密ろ過膜（ＭＦ
膜）等によるろ過等が用いられる。上記の穀類、穀類の
脱穀粕、植物の抽出粕、植物の絞り粕としては、一例と
して、大豆、米、麦等の穀類及びこれらの穀類の脱穀時
に排出される脱穀粕（例えば、籾殻）、茶やコーヒー等
の抽出粕、砂糖きび等の絞り粕（例えば、バガス）等が
挙げられる。また、これらの固形物を水存在下で加熱処
理する際には、これらに含まれる微生物を死滅させると
ともに、酵素を失活させるという観点等から、６０〜１
５０℃程度の温度で所定時間、例えば、数秒〜２時間、
場合によっては加圧しながら加熱処理することが望まし
い。In the above method of the present invention, the heat-treated solution obtained by heat-treating at least one of cereals, cereal threshing lees, plant extract lees, and plant pomace lees in the presence of water may be a natural heat-treated liquid. It is desirable to add to the muddy water as a coagulant derived from organic matter. Further, in the above method of the present invention, a cereal, cereal threshing lees, at least one of plant extracted lees and plant pomace lees is subjected to heat treatment in the presence of water to obtain a heat-treated liquid, and It is desirable to add the solution from which at least the coarse particles have been removed to muddy water as a coagulant derived from natural organic matter. In this case, only the coarse particles (large-diameter solids) are removed from the heat treatment liquid, and the solution mixed with the fine particles can be used as a coagulant. However, a solution from which fine particles have been completely removed can be used as a flocculant. Means for removing coarse particles (and fine particles) from the heat treatment liquid include screens, filter papers, and microfiltration membranes (MF) according to the particle size of the particles to be removed.
Filtration by a membrane or the like is used. As the above cereals, cereal threshing lees, plant extraction lees, plant pulp lees, as an example, soybeans, rice, wheat and other cereals and threshing lees discharged during threshing of these cereals (eg, rice husk), Examples include extracted lees such as tea and coffee and squeezed lees (eg, bagasse) such as sugar cane. When these solids are heat-treated in the presence of water, from the viewpoint of killing the microorganisms contained therein and inactivating the enzymes, from the viewpoint of, for example, 60 to 1
A predetermined time at a temperature of about 50 ° C., for example, several seconds to 2 hours,
In some cases, it is desirable to perform the heat treatment while applying pressure.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態につい
て詳細に説明する。図１は、本発明の実施の第１形態に
よる泥水処理方法を実施する装置の概略構成を示してい
る。本実施の形態は、泥水加圧シールド工法において、
シールド掘削機から排出される泥水に、凝集剤として天
然有機物の加熱処理液を添加して、この泥水を急速撹拌
し、ついで、緩速撹拌した後、凝集沈殿させて沈殿物
（凝集汚泥）と上澄液とに分離し、沈殿物（凝集汚泥）
を脱水処理して脱水ケーキとして排出し、前記上澄液を
脱水液とともに泥水濃度調整槽に導入した後、この処理
泥水を再びシールド掘削機に戻すものである。なお、泥
水加圧シールド工法とは、シールド掘削機における過度
の温度上昇の防止と切刃（カッター）の安定化のため
に、シールド掘削機の切削面と地山（岩盤など）との間
に、約２kg／cm2 の絶対圧力状態の（希薄な）泥水を連
続的に添加する工法である。シールド掘削機から排出さ
れる泥水は、切削した地山を含むため、添加時の泥水よ
り高濃度となって地上に搬出される。この泥水から切削
土砂分の泥土を除去するのに、天然有機物の加熱処理液
を凝集剤として使用し、地上に搬出された泥水から切削
土砂分を脱水ケーキとして除去した後、処理泥水を再び
地下のシールド掘削機における切削面に戻すのである。Embodiments of the present invention will be described below in detail. FIG. 1 shows a schematic configuration of an apparatus for performing a muddy water treatment method according to a first embodiment of the present invention. This embodiment is based on the muddy pressure shield method,
To the mud discharged from the shield excavator, a heat treatment liquid of a natural organic substance is added as a coagulant, and the mud is rapidly stirred, and then slowly stirred, coagulated and sedimented to form a sediment (agglomerated sludge). Separated into supernatant and sediment (agglomerated sludge)
Is dewatered and discharged as a dewatered cake. After the supernatant is introduced into the mud concentration adjusting tank together with the dewatered liquid, the treated mud is returned to the shield excavator again. The muddy pressurized shield method is used to prevent excessive temperature rise in the shield excavator and stabilize the cutting blade (cutter) between the cutting surface of the shield excavator and the ground (rock, etc.). This is a method of continuously adding (dilute) mud water at an absolute pressure of about 2 kg / cm 2 . Since the mud discharged from the shield excavator includes ground ground that has been cut, the mud has a higher concentration than the mud at the time of addition and is carried to the ground. In order to remove the mud from the mud, the heat treatment liquid of natural organic matter is used as a coagulant. After removing the cut sediment as a dewatered cake from the mud carried out to the ground, the treated mud is returned to the underground again. To the cutting surface of the shield excavator.
【００１１】図１に示すように、シールド掘削機（図示
略）から排出される泥水に、上述したような天然有機物
由来の凝集剤を添加し、この泥水を急速撹拌機１０に導
入して、８０〜２００rpm程度の撹拌速度で１０秒間〜
５分間程度撹拌処理した後、泥水と凝集剤との混合物を
緩速撹拌機１２に導入して、１０〜７０rpm程度の撹拌
速度で５分間〜１時間程度撹拌処理を行う。なお、撹拌
機としては、例えば、パドル式撹拌機、ラインミキサ
ー、迂流式撹拌機等が挙げられる。緩速撹拌後の泥水と
凝集剤との混合物を沈殿槽１４に供給して、沈殿物（凝
集汚泥）を沈降分離し、この沈殿物（凝集汚泥）と上澄
液とを分離した後、一方の沈殿物（凝集汚泥）を脱水機
１６に供給して脱水ケーキと脱水液とに分離し、他方の
上澄液を脱水機１６からの脱水液とともに泥水濃度調整
槽（図示略）に導入して濃度の調整を行い、濃度調整さ
れた処理泥水を再びシールド掘削機（図示略）に戻すよ
うにする。As shown in FIG. 1, a coagulant derived from a natural organic substance as described above is added to mud discharged from a shield excavator (not shown), and this mud is introduced into a rapid stirrer 10. 10 seconds at a stirring speed of about 80 to 200 rpm
After the stirring treatment for about 5 minutes, the mixture of the muddy water and the flocculant is introduced into the slow stirring machine 12, and the stirring treatment is performed at a stirring speed of about 10 to 70 rpm for about 5 minutes to 1 hour. In addition, as a stirrer, a paddle type stirrer, a line mixer, a detour type stirrer, etc. are mentioned, for example. The mixture of the muddy water and the flocculant after the slow stirring is supplied to the sedimentation tank 14 to sediment and separate the sediment (coagulated sludge), and the sediment (coagulated sludge) and the supernatant are separated. Is supplied to the dehydrator 16 to separate it into a dewatered cake and a dehydrated liquid, and the other supernatant is introduced into a mud concentration control tank (not shown) together with the dehydrated liquid from the dehydrator 16. The concentration of the treated mud is adjusted to return to the shield excavator (not shown) again.
【００１２】ここで、シールド掘削機（図示略）で切削
された地山（岩盤など）の含水率及び沈殿物から得られ
る脱水ケーキの含水率のバランスがとれている場合、シ
ールド掘削機（図示略）から排出される泥水と、泥水濃
度調整槽（図示略）に導入されシールド掘削機に戻され
る希薄な泥水（上澄液及び脱水液）との循環は、完全閉
鎖系のような状態となり、系外に排出される上澄液及び
脱水液（希薄な泥水）の量はわずかである。系外に排出
される上澄液及び脱水液は、小規模な水処理装置１８で
水処理を行って排出されるか、あるいは、直接公共下水
道に放流されることになる。なお、脱水機としては、例
えば、フィルタープレス式脱水機、ベルトプレス式脱水
機、スクリュープレス式脱水機、遠心分離脱水機、真空
ドラム式脱水機等が挙げられる。また、水処理装置とし
ては、例えば、砂ろ過装置、膜ろ過装置、活性炭吸着
塔、活性汚泥処理装置、接触酸化処理装置等が挙げられ
る。脱水機１６から排出される脱水ケーキは、凝集剤と
して天然有機物の加熱処理液を用いているので、処分地
の土壌中等で容易に生物分解され、新たな土壌汚染や水
質汚染を起こす心配はない。Here, when the water content of the ground (rock etc.) cut by the shield excavator (not shown) and the water content of the dewatered cake obtained from the sediment are balanced, the shield excavator (not shown) The circulation of the mud discharged from the mud and the dilute mud (supernatant and dehydrated liquid) introduced into the mud concentration adjusting tank (not shown) and returned to the shield excavator is in a completely closed system. The amount of the supernatant liquid and the dehydration liquid (dilute muddy water) discharged out of the system is very small. The supernatant liquid and the dehydrated liquid discharged out of the system are discharged after being subjected to water treatment in a small-scale water treatment device 18 or directly discharged to a public sewer. In addition, as a dehydrator, a filter press dehydrator, a belt press dehydrator, a screw press dehydrator, a centrifugal dehydrator, a vacuum drum dehydrator, etc. are mentioned, for example. Examples of the water treatment device include a sand filtration device, a membrane filtration device, an activated carbon adsorption tower, an activated sludge treatment device, and a contact oxidation treatment device. Since the dehydrated cake discharged from the dehydrator 16 uses a heat-treated liquid of a natural organic substance as a coagulant, it is easily biodegraded in soil at a disposal site, and there is no fear of causing new soil pollution or water pollution. .
【００１３】図２は、本発明の実施の第２形態による泥
水処理方法を実施する装置の概略構成を示している。本
実施の形態は、泥水加圧シールド工法において、シール
ド掘削機から排出される泥水に、凝集剤として天然有機
物の加熱処理液を添加して、この泥水を撹拌した後、凝
集沈殿させて沈殿物（凝集汚泥）と上澄液とに分離し、
沈殿物（凝集汚泥）を脱水処理して脱水ケーキとして排
出し、前記上澄液を脱水液とともに泥水濃度調整槽に導
入した後、この処理泥水を再びシールド掘削機に戻すも
のである。FIG. 2 shows a schematic configuration of an apparatus for performing a muddy water treatment method according to a second embodiment of the present invention. In the present embodiment, in the muddy water pressurized shield method, a heat treatment liquid of a natural organic substance is added as a coagulant to muddy water discharged from a shield excavator, and the muddy water is stirred, and then coagulated and precipitated. (Coagulated sludge) and supernatant liquid,
The sediment (agglomerated sludge) is dewatered and discharged as a dewatered cake. The supernatant is introduced into a mud concentration adjusting tank together with the dehydrated liquid, and the treated mud is returned to the shield excavator again.
【００１４】図２に示すように、シールド掘削機（図示
略）から排出される泥水に、上述したような天然有機物
由来の凝集剤を添加し、この泥水を撹拌機１１に導入し
て撹拌処理を行う。この場合、１台の撹拌機で急速撹拌
と緩速撹拌とを行うことになる。なお、一般的には、急
速撹拌と緩速撹拌の両方が行われるが、装置によって
は、装置のハードや凝集剤及び対象水の特性から、急速
撹拌と緩速撹拌とを明確に区別できない場合もある。例
えば、大きい槽でのパドル式撹拌機では、パドル外側と
軸側で水の流速が違うので、凝集剤の添加位置をうまく
設置すれば、１槽で急速撹拌も緩速撹拌も行える。ま
た、例えば、凝集剤と濁質との相性がよく、破壊されに
くい強固なフロックができるときは、急速撹拌とも緩速
撹拌とも定義しにくい１撹拌方式が採用される。撹拌後
の泥水と凝集剤との混合物を沈殿槽１４に供給して、沈
殿物（凝集汚泥）を沈降分離し、この沈殿物（凝集汚
泥）と上澄液とを分離した後、一方の沈殿物（凝集汚
泥）を脱水機１６に供給して脱水ケーキと脱水液とに分
離し、他方の上澄液を脱水機１６からの脱水液とともに
泥水濃度調整槽（図示略）に導入して濃度の調整を行
い、濃度調整された処理泥水を再びシールド掘削機（図
示略）に戻すようにする。系外に排出される上澄液及び
脱水液は、小規模な水処理装置１８で水処理を行って排
出されるか、あるいは、直接公共下水道に放流される。
他の構成及び作用等は、実施の第１形態の場合と同様で
ある。なお、上記の実施の形態では、シールド掘削機か
ら排出される泥水を処理する場合について説明したが、
他の泥水についても勿論適用することができる。As shown in FIG. 2, a coagulant derived from a natural organic substance as described above is added to muddy water discharged from a shield excavator (not shown), and this muddy water is introduced into a stirrer 11 to perform a stirring process. I do. In this case, rapid stirring and slow stirring are performed by one stirrer. In general, both rapid stirring and slow stirring are performed. However, depending on the device, it is not possible to clearly distinguish the rapid stirring and the slow stirring from the hardware of the device and the properties of the coagulant and the target water. There is also. For example, in a paddle type stirrer in a large tank, the flow rate of water is different between the outside of the paddle and the shaft side. Therefore, if the addition position of the flocculant is properly set, rapid stirring and slow stirring can be performed in one tank. In addition, for example, when the flocculant and the turbidity have good compatibility and a strong floc that is not easily broken can be formed, a one-stirring method that is difficult to define as either rapid stirring or slow stirring is employed. The mixture of the muddy water and the flocculant after the stirring is supplied to the sedimentation tank 14, and the sediment (coagulated sludge) is settled and separated. The debris (agglomerated sludge) is supplied to the dehydrator 16 to be separated into a dehydrated cake and a dehydrated liquid, and the other supernatant is introduced into a mud concentration adjusting tank (not shown) together with the dehydrated liquid from the dehydrator 16 for concentration. Is adjusted, and the treated mud whose concentration has been adjusted is returned to the shield excavator (not shown) again. The supernatant and the dehydrated liquid discharged outside the system are subjected to water treatment by a small-scale water treatment device 18 and discharged, or are discharged directly to a public sewer.
Other configurations, operations, and the like are the same as those in the first embodiment. In the above embodiment, the case where muddy water discharged from the shield excavator is treated has been described.
Of course, other muddy water can be applied.
【００１５】[0015]
【実施例】以下、本発明の好適な実施例について説明す
る。本実施例は、大豆等の穀類、籾殻、米糠、茶殻、バ
ガス（砂糖きびの絞り粕）等の食品廃棄物又は農産廃棄
物を水存在下で加熱処理して得られた加熱処理液を、泥
水に添加して凝集処理を行ったものである。 実施例１ 原料（大豆、籾殻、米糠）をコーヒーミルにて破砕し、
５００mLビーカに破砕した原料２０gと水２００mLを加
えた後、バーナで加熱して沸騰させ、そのまま弱火で３
０分間加熱した。得られた加熱処理液を１．０μmの精
密ろ過膜（ＭＦ膜）でろ過して、得られた分離液を天然
有機物由来の凝集剤とした。なお、米糠のみコロイド成
分が多くＭＦ膜ろ過が困難であり、６３μmのフルイで
ろ過したサンプルを使用した。１０g／Lの泥水（すなわ
ち、１L当り１０gの泥土を含有する泥水）に、これらの
凝集剤を添加率１０mL／Lで添加して、この泥水を１５
０rpmの撹拌速度で３分間急速撹拌し、ついで、５０rpm
の撹拌速度で１０分間緩速撹拌した後、３０分間凝集沈
殿させて沈殿物と上澄液とに分離した。上澄液の透視度
からそれぞれの凝集剤の凝集沈殿効果を判断した。な
お、上澄液の透視度は、波長６６０nmにおける吸光度
（ＯＤ６６０）により測定した。実施例１の結果を表１
に示す。表１において、◎印は「凝集性がきわめて良好
である」を示し、○印は「凝集性が良好である」を示し
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. In this embodiment, a heat treatment liquid obtained by heat-treating food waste or agricultural waste such as cereals such as soybeans, rice hulls, rice bran, tea husks, bagasse (sugar cake of sugarcane) in the presence of water is used as muddy water. And subjected to a coagulation treatment. Example 1 Raw materials (soy, rice husk, rice bran) were crushed in a coffee mill,
After adding 20 g of crushed raw material and 200 mL of water to a 500 mL beaker, heat it with a burner to bring to a boil,
Heated for 0 minutes. The obtained heat-treated liquid was filtered through a 1.0 μm microfiltration membrane (MF membrane), and the obtained separated liquid was used as a coagulant derived from a natural organic substance. Note that only rice bran contains a large amount of colloidal components and is difficult to filter through an MF membrane. A sample filtered through a 63 μm sieve was used. To 10 g / L of mud (i.e., mud containing 10 g of mud per liter), these flocculants were added at an addition rate of 10 mL / L, and the mud was added to the mud.
Stir rapidly for 3 minutes at a stirring speed of 0 rpm, then
After slowly stirring at a stirring speed of 10 minutes, coagulation and sedimentation were performed for 30 minutes to separate the precipitate from the supernatant. The flocculation effect of each flocculant was determined from the degree of transparency of the supernatant. The transparency of the supernatant was measured by the absorbance (OD660) at a wavelength of 660 nm. Table 1 shows the results of Example 1.
Shown in In Table 1, the symbol ◎ indicates “very good cohesiveness” and the symbol ○ indicates “good cohesiveness”.
【００１６】[0016]
【表１】 [Table 1]
【００１７】表１の結果から、大豆の加熱処理液を泥水
に添加した場合に、上澄液の透視度が極めて良好であ
り、優れた凝集沈殿が見られることがわかった。また、
籾殻の加熱処理液を泥水に添加した場合も、上澄液の透
視度は良好であり、優れた凝集沈殿が見られることがわ
かった。なお、ＳＳ（懸濁浮遊物）が含まれる米糠の加
熱処理液の場合も、上澄液の透視度は良好であり、優れ
た凝集沈殿が見られた。つぎに、凝集沈殿効果の高い大
豆の加熱処理液について、泥水への添加率をいろいろと
変化させて上澄液の透視度（ＯＤ６６０）を測定し、凝
集剤の添加率と凝集沈殿効果との関係を検討した。表２
及び図３に測定結果を示す。表２及び図３の結果から、
１．０mL／L程度の添加率で充分な凝集沈殿が見られ、
凝集剤を２．５mL／L以上添加しても凝集沈殿効果には
ほとんど差がないことがわかった。From the results in Table 1, it was found that when the heat-treated solution of soybean was added to the muddy water, the transparency of the supernatant was extremely good, and excellent coagulated sedimentation was observed. Also,
When the rice husk heat-treated liquid was added to the muddy water, the supernatant liquid had good transparency, and it was found that excellent coagulated sedimentation was observed. In addition, also in the case of the heat-treated rice bran solution containing SS (suspension suspended matter), the transparency of the supernatant was good, and excellent coagulation sedimentation was observed. Next, with respect to the heat-treated solution of soybean having a high coagulation / sedimentation effect, the transmittance (OD660) of the supernatant was measured by variously changing the addition ratio to the muddy water. Considered the relationship. Table 2
FIG. 3 shows the measurement results. From the results in Table 2 and FIG.
At an addition rate of about 1.0 mL / L, sufficient coagulation and precipitation are seen,
It was found that even if the coagulant was added at 2.5 mL / L or more, there was almost no difference in the coagulation precipitation effect.
【００１８】[0018]
【表２】 [Table 2]
【００１９】実施例２ 原料（籾殻、バガス、茶殻、大豆、米糠）をコーヒーミ
ルにて破砕し、３００mL三角フラスコに破砕した原料２
５g又は５０gと蒸留水２００mLを加えた後、温度１２１
℃、圧力２．２kg／cm2Aのオートクレーブで１時間加熱
処理した。得られた加熱処理液を孔径１．０μmのろ紙
（ＧＡ１００）でろ過して、得られた分離液を天然有機
物由来の凝集剤とした。なお、大豆及び米糠は、５００
０rpmの回転速度で３分間遠心分離した後、ＧＡ１００
でろ過した。１０g／Lの泥水（すなわち、１L当り１０g
の泥土を含有する泥水）に、これらの凝集剤を添加率２
０mL／Lで添加して、この泥水を１５０rpmの撹拌速度で
３分間急速撹拌し、ついで、５０rpmの撹拌速度で１０
分間緩速撹拌した後、３０分間凝集沈殿させて沈殿物と
上澄液とに分離した。上澄液の透視度からそれぞれの凝
集剤の凝集沈殿効果を判断した。なお、上澄液の透視度
は、波長６６０nmにおける吸光度（ＯＤ６６０）により
測定した。実施例２の結果を表３に示す。表３におい
て、◎印は「凝集性がきわめて良好である」を示し、○
印は「凝集性が良好である」を示している。EXAMPLE 2 Raw materials (rice husk, bagasse, tea husk, soybean, rice bran) were crushed by a coffee mill and crushed into a 300 mL Erlenmeyer flask.
After adding 5 g or 50 g and 200 mL of distilled water, the temperature was adjusted to 121.
The mixture was heated in an autoclave at a temperature of 2.2 ° C. and a pressure of 2.2 kg / cm 2 A for 1 hour. The obtained heat-treated liquid was filtered through filter paper (GA100) having a pore size of 1.0 μm, and the obtained separated liquid was used as a coagulant derived from a natural organic substance. In addition, soybean and rice bran are 500
After centrifugation at 0 rpm for 3 minutes, GA100
And filtered. 10g / L mud (ie 10g / L)
Muddy water containing muddy soil), these coagulants were added at a rate of 2
The muddy water was rapidly stirred at a stirring speed of 150 rpm for 3 minutes, and then added at a stirring speed of 50 rpm for 10 minutes.
After gently stirring for 30 minutes, the mixture was aggregated and precipitated for 30 minutes to separate the precipitate from the supernatant. The flocculation effect of each flocculant was determined from the degree of transparency of the supernatant. The transparency of the supernatant was measured by the absorbance (OD660) at a wavelength of 660 nm. Table 3 shows the results of Example 2. In Table 3, ◎ indicates “very good cohesiveness”, and
The mark indicates "good cohesiveness".
【００２０】[0020]
【表３】 [Table 3]
【００２１】表３の結果から、籾殻の加熱処理液を泥水
に添加した場合に、上澄液の透視度が極めて良好であ
り、優れた凝集沈殿が見られることがわかった。また、
バガスや茶殻の加熱処理液を泥水に添加した場合も、上
澄液の透視度は良好であり、優れた凝集沈殿が見られる
ことがわかった。また、実施例１でも用いた大豆、米糠
の加熱処理液の場合も、上澄液の透視度は良好であり、
優れた凝集沈殿が見られた。つぎに、凝集沈殿効果の高
い籾殻の加熱処理液と無機系凝集剤であるポリ塩化アル
ミニウム（ＰＡＣ）について、泥水への添加率をいろい
ろと変化させて上澄液の透視度（ＯＤ６６０）を測定
し、籾殻の加熱処理液とポリ塩化アルミニウム（ＰＡ
Ｃ）との凝集沈殿効果を比較するとともに、凝集剤の添
加率と凝集沈殿効果との関係を検討した。表４、表５及
び図４に測定結果を示す。表４、表５及び図４の結果か
ら、籾殻の加熱処理液とポリ塩化アルミニウム（ＰＡ
Ｃ）とでは凝集効果は同程度と判断でき、籾殻の加熱処
理液が凝集剤として優れたものであることがわかった。
また、表４及び図４の結果から、籾殻の加熱処理液は、
１．２mL／L程度の添加率で充分な凝集沈殿が見られ、
２．５mL／L以上添加しても凝集沈殿効果にはほとんど
差がないことがわかった。From the results shown in Table 3, it was found that when the heat-treated liquid of rice husk was added to the muddy water, the transparency of the supernatant was extremely good, and excellent coagulated sedimentation was observed. Also,
When the heat-treated solution of bagasse or tea husk was added to the muddy water, the transparency of the supernatant was good, and it was found that excellent coagulated sedimentation was observed. Also, in the case of the heat-treated solution of soybean and rice bran used in Example 1, the transparency of the supernatant was good,
Excellent coagulated sedimentation was observed. Next, with respect to the heat treatment liquid of rice husk having a high coagulation sedimentation effect and polyaluminum chloride (PAC) as an inorganic coagulant, the transmittance (OD660) of the supernatant liquid was measured by variously changing the addition rate to muddy water. Rice husk heat treatment liquid and polyaluminum chloride (PA
The effect of coagulation and sedimentation with C) was compared, and the relationship between the addition rate of coagulant and the effect of coagulation and sedimentation was examined. Table 4, Table 5, and FIG. 4 show the measurement results. From the results of Table 4, Table 5, and FIG. 4, the heat treatment liquid of rice hulls and polyaluminum chloride (PA
With C), the coagulation effect could be judged to be about the same, and it was found that the heat treatment liquid for rice hulls was an excellent coagulant.
In addition, from the results in Table 4 and FIG.
At an addition rate of about 1.2 mL / L, sufficient coagulation and precipitation are seen,
It was found that even when 2.5 mL / L or more was added, there was almost no difference in the coagulation sedimentation effect.
【００２２】[0022]
【表４】 [Table 4]
【００２３】[0023]
【表５】 [Table 5]
【００２４】[0024]
【発明の効果】本発明は上記のように構成されているの
で、つぎのような効果を奏する。 （１） 安価で生物分解性に優れた天然有機物の加熱処
理液を泥水の凝集剤として使用するので、泥水処理コス
トを大幅に引き下げることができ、凝集処理した後の凝
集汚泥（泥土）を土壌等に還元しても容易に生物分解さ
れ、土壌汚染や水質汚染を起こすおそれがない。 （２） 食品廃棄物や農産廃棄物等として排出され、処
理に困っている固形物又は／及び廃液を、天然有機物由
来の凝集剤として有効利用するので、極めて安価で環境
に優しい凝集剤を用いた泥水処理が行える。 （３） 従来の泥水処理技術には必要であった高分子凝
集剤の溶解装置等の設備が一切不要となる。 （４） 凝集処理後に排出処分される脱水ケーキ等に
は、窒素やリン等の肥料として有効な成分が混入してい
るため、土壌としての有効利用性が向上する。As described above, the present invention has the following effects. (1) Since the heat treatment liquid of natural organic matter, which is inexpensive and has excellent biodegradability, is used as a flocculant, the cost of the muddy water treatment can be significantly reduced. Even if reduced to the like, it is easily biodegraded, and there is no risk of causing soil pollution or water pollution. (2) Since solids and / or waste liquids that are discharged as food waste or agricultural waste and are difficult to treat are effectively used as a coagulant derived from natural organic substances, an extremely inexpensive and environmentally friendly coagulant is used. Can perform muddy water treatment. (3) No equipment such as a polymer flocculant dissolving device required for the conventional muddy water treatment technology is required. (4) Since the dewatered cake and the like discharged after the coagulation treatment contain components effective as fertilizers such as nitrogen and phosphorus, the effective utilization as soil is improved.
【図１】本発明の実施の第１形態による泥水処理方法を
実施する装置を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an apparatus for performing a muddy water treatment method according to a first embodiment of the present invention.
【図２】本発明の実施の第２形態による泥水処理方法を
実施する装置を示す概略構成図である。FIG. 2 is a schematic configuration diagram showing an apparatus for performing a muddy water treatment method according to a second embodiment of the present invention.
【図３】凝集剤（大豆の加熱処理液）の添加率と凝集沈
殿効果（吸光度ＯＤ６６０の測定による上澄液の透視
度）との関係を示すグラフである。FIG. 3 is a graph showing the relationship between the addition rate of a coagulant (heat-treated soybean liquid) and the coagulation / precipitation effect (transparency of the supernatant liquid by measuring absorbance OD660).
【図４】凝集剤（籾殻の加熱処理液、ＰＡＣ）の添加率
と凝集沈殿効果（吸光度ＯＤ６６０の測定による上澄液
の透視度）との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the addition rate of a coagulant (rice husk heat-treated liquid, PAC) and the coagulation-sedimentation effect (transparency of the supernatant obtained by measuring the absorbance OD660).
１０ 急速撹拌機 １１ 撹拌機 １２ 緩速撹拌機 １４ 沈殿槽 １６ 脱水機 １８ 水処理装置 DESCRIPTION OF SYMBOLS 10 Rapid stirrer 11 Stirrer 12 Slow stirrer 14 Sedimentation tank 16 Dehydrator 18 Water treatment device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高垣 一良 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 (72)発明者 森 高志 神戸市中央区東川崎町１丁目１番３号 川 崎重工業株式会社神戸本社内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kazura Takagaki 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside Akashi Plant (72) Inventor Takashi Mori 1-3-1, Higashi-Kawasaki-cho, Chuo-ku, Kobe-shi No. Kawasaki Heavy Industries, Ltd.Kobe Head Office
Claims (8)
て泥水に添加して泥水の凝集処理を行うことを特徴とす
る泥水処理方法。1. A muddy water treatment method comprising adding a heat treatment liquid of a natural organic substance to muddy water as a coagulant to perform coagulation treatment of the muddy water.
て泥水に添加して、この泥水を撹拌した後、凝集沈殿さ
せて沈殿物と上澄液とに分離することを特徴とする泥水
処理方法。2. A muddy water treatment comprising adding a heat treatment liquid of a natural organic substance to a muddy water as a flocculant, stirring the muddy water, coagulating and sedimenting the liquid, and separating the precipitate into a supernatant liquid. Method.
て泥水に添加して、この泥水を急速撹拌し、ついで、緩
速撹拌した後、凝集沈殿させて沈殿物と上澄液とに分離
し、沈殿物を脱水処理して脱水ケーキと脱水液とに分離
することを特徴とする泥水処理方法。3. A heat treatment liquid of a natural organic substance is added to muddy water as a flocculant, and the muddy water is rapidly stirred, and then slowly stirred, and then coagulated and precipitated to separate a precipitate and a supernatant liquid. And a dewatering treatment for separating the precipitate into a dewatered cake and a dewatered liquid.
いずれかの固形物を水存在下で加熱処理して得られる加
熱処理液を、天然有機物由来の凝集剤として泥水に添加
する請求項１、２又は３記載の泥水処理方法。4. A heat-treated liquid obtained by heat-treating at least one of solids of food waste and agricultural waste in the presence of water is added to muddy water as a coagulant derived from natural organic matter. 4. The method for treating muddy water according to 2 or 3.
いずれかの固形物を水存在下で加熱処理して加熱処理液
を得、この加熱処理液から少なくとも粗大粒子を除去し
た溶液を、天然有機物由来の凝集剤として泥水に添加す
る請求項１、２又は３記載の泥水処理方法。5. A heat-treated liquid obtained by heat-treating at least one of a food waste and an agricultural waste in the presence of water, and removing a solution obtained by removing at least coarse particles from the heat-treated liquid. 4. The muddy water treatment method according to claim 1, wherein the muddy water is added to the muddy water as a coagulant derived therefrom.
いずれかとして排出される加熱処理廃液を、天然有機物
由来の凝集剤として泥水に添加する請求項１、２又は３
記載の泥水処理方法。6. The heat treatment waste liquid discharged as at least one of food waste and agricultural waste is added to muddy water as a coagulant derived from a natural organic substance.
The muddy water treatment method described in the above.
植物の絞り粕の少なくともいずれかを水存在下で加熱処
理して得られる加熱処理液を、天然有機物由来の凝集剤
として泥水に添加する請求項１、２又は３記載の泥水処
理方法。7. A heat-treated liquid obtained by heat-treating at least one of cereals, cereal husks, plant extract cakes and plant pomace cakes in the presence of water, is converted into muddy water as a coagulant derived from natural organic matter. The muddy water treatment method according to claim 1, 2 or 3, which is added.
植物の絞り粕の少なくともいずれかを水存在下で加熱処
理して加熱処理液を得、この加熱処理液から少なくとも
粗大粒子を除去した溶液を、天然有機物由来の凝集剤と
して泥水に添加する請求項１、２又は３記載の泥水処理
方法。8. A heat-treated liquid is obtained by subjecting at least one of cereals, cereal dehulled cake, plant extract cake and plant pomace cake in the presence of water to obtain a heat treatment solution, and removing at least coarse particles from the heat treatment solution. The muddy water treatment method according to claim 1, 2 or 3, wherein the solution obtained is added to the muddy water as a coagulant derived from a natural organic substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27957797A JP3162663B2 (en) | 1997-09-26 | 1997-09-26 | Mud treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27957797A JP3162663B2 (en) | 1997-09-26 | 1997-09-26 | Mud treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1199393A true JPH1199393A (en) | 1999-04-13 |
| JP3162663B2 JP3162663B2 (en) | 2001-05-08 |
Family
ID=17612927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27957797A Expired - Fee Related JP3162663B2 (en) | 1997-09-26 | 1997-09-26 | Mud treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3162663B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008272708A (en) * | 2007-05-07 | 2008-11-13 | Kita Kikai Sangyo Kk | Method for manufacturing flocculant with flocculation effect on suspended solid in water |
| CN104030494A (en) * | 2014-06-30 | 2014-09-10 | 成都高普石油工程技术有限公司 | Solid-liquid separation method of waste drilling liquid |
| CN104086023A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Method conducive to reducing energy consumption for solid-liquid separation of drilling waste liquid |
-
1997
- 1997-09-26 JP JP27957797A patent/JP3162663B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008272708A (en) * | 2007-05-07 | 2008-11-13 | Kita Kikai Sangyo Kk | Method for manufacturing flocculant with flocculation effect on suspended solid in water |
| CN104030494A (en) * | 2014-06-30 | 2014-09-10 | 成都高普石油工程技术有限公司 | Solid-liquid separation method of waste drilling liquid |
| CN104086023A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Method conducive to reducing energy consumption for solid-liquid separation of drilling waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3162663B2 (en) | 2001-05-08 |
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