JPH10192899A - Method for treating dredged sludge - Google Patents
Method for treating dredged sludgeInfo
- Publication number
- JPH10192899A JPH10192899A JP9013267A JP1326797A JPH10192899A JP H10192899 A JPH10192899 A JP H10192899A JP 9013267 A JP9013267 A JP 9013267A JP 1326797 A JP1326797 A JP 1326797A JP H10192899 A JPH10192899 A JP H10192899A
- Authority
- JP
- Japan
- Prior art keywords
- mud
- polymer flocculant
- water
- dredged
- dredged mud
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は湖沼の底泥を浚渫し
外部に搬出するにあたり脱水機等により水分を除去する
に効率的な処方を提供するものであり、さらに詳しくは
浚渫泥にアニオン性（メタ）アクリル系高分子凝集剤を
添加混合した後にＮビニルホルムアミド（共）重合体の
加水分解物を添加混合して浚渫泥を凝集せしめ、凝集浚
渫泥中の水分を脱水機等により効率良く除去し、外部に
搬出するに容易な流動性の無いケーキ状の固形土を得る
事を目的とする浚渫泥の処理方法である。BACKGROUND OF THE INVENTION The present invention provides an efficient prescription for removing water by a dehydrator when dredging bottom mud of a lake or marsh and carrying it out to the outside. After adding and mixing a (meth) acrylic polymer flocculant, a hydrolyzate of N-vinylformamide (co) polymer is added and mixed to coagulate the dredged mud, and the water in the coagulated dredged mud is efficiently removed by a dehydrator or the like. This is a method for treating dredging mud for the purpose of obtaining cake-like solid soil without fluidity that is easy to remove and carry out to the outside.
【０００２】[0002]
【従来の技術】従来、浚渫は海底の泥土を他の海面へ移
動させ該海面を埋め立てたり、単なる他場所への放棄を
行い、その主たる関心は埋め立てまたは放棄海面の汚濁
防止であり、浚渫パイプのサクションに高分子凝集剤を
添加する事を常道とする。 ここに添加する高分子凝集
剤は通常は液体が用いられるが粉末高分子凝集剤の分散
液を使用する方法（特開昭４９−３７４４２号公報）も
知られている。 また浚渫泥とその物性を異にするもの
の各種スラッジの脱水にデュアルシステムと総称される
２種の高分子凝集剤を逐次添加する事により凝集脱水処
理を行う方法も公知であり、アニオン性（メタ）アクリ
ル系高分子凝集剤を添加混合した後にカチオン性高分子
凝集剤を添加する方法も各種知られている。 しかしこ
の場合、通常アニオン性（メタ）アクリル系高分子凝集
剤を添加混合した後に低分子量の縮合系カチオン性高分
子凝集剤やポリエチレンイミン等が用いられ、Ｎビニル
ホルムアミド（共）重合体の加水分解物から成る高分子
凝集剤を添加混合する事は稀である。 特開平０８−２
５７３１７号公報には無薬注でフィルタープレスにより
脱水する技術が開示されているが作業効率が甚だしく劣
り、大量の浚渫泥を効率良く脱水するには不適である。
該公報に記載の従来技術は、天日乾燥、石灰系の固化
剤との混合による吸水脱水、海面埋め立ての３種であ
り、その欠点は該公報に記載されている。 湖沼の浚渫
泥はヘドロ成分等を含み、その凝集処理を効率よく行う
事は従来技術では困難であった。2. Description of the Related Art Conventionally, dredging involves moving mud on the seabed to another sea surface to reclaim the sea surface or simply abandon it to another place, and its main interest is to prevent landfill or pollution of the abandoned sea surface. It is customary to add a polymer flocculant to the suction of (1). A liquid is generally used as the polymer flocculant to be added here, but a method using a dispersion of a powdery polymer flocculant is also known (JP-A-49-37442). Also known is a method of performing coagulation and dehydration treatment by sequentially adding two types of polymer coagulants generally referred to as a dual system to the dehydration of various sludges having different physical properties from dredging mud, and an anionic (meta) Various methods of adding a cationic polymer flocculant after adding and mixing an acrylic polymer flocculant are also known. However, in this case, a low molecular weight condensed cationic polymer flocculant or polyethyleneimine is usually used after adding and mixing an anionic (meth) acrylic polymer flocculant, and the N-vinylformamide (co) polymer is hydrolyzed. It is rare to add and mix a polymer flocculant composed of a decomposition product. JP-A-08-2
No. 57317 discloses a technique of dehydrating by a filter press without chemical injection, but the working efficiency is extremely poor, and it is not suitable for efficiently dehydrating a large amount of dredging mud.
The prior art described in this publication is of three types: sun drying, water absorption and dehydration by mixing with a lime-based solidifying agent, and sea reclamation, and the drawbacks are described in this publication. The dredged mud of a lake contains sludge components and the like, and it has been difficult with the prior art to efficiently perform the coagulation treatment.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は周辺を
汚染する事無く、狭い敷地で浚渫泥を効率良く脱水する
事により、その体積を減少させると共に流動性を除去
し、外部搬出を容易にする方法を提供する事をその課題
とする。SUMMARY OF THE INVENTION An object of the present invention is to efficiently dewater dredged mud on a narrow site without contaminating the surrounding area, thereby reducing its volume and removing fluidity and making it easy to carry out outside. The task is to provide a method for
【０００４】[0004]
【課題を解決する為の手段】本発明者は湖沼の浚渫泥を
凝集処理する方法を各種検討し、下記方法により目的を
達成できる事を発見し、本発明を成すに至った。The present inventors have studied various methods for coagulating dredged mud in lakes and marshes and found that the object can be achieved by the following method, and have accomplished the present invention.
【０００５】本発明の請求項１の発明は、浚渫泥にアニ
オン性（メタ）アクリル系高分子凝集剤を添加混合した
後、Ｎビニルホルムアミド（共）重合体の加水分解物を
添加混合して浚渫泥を凝集させ、次いで水を分離する事
により浚渫泥の流動性を除去する事を特徴とする浚渫泥
の処理方法である。According to a first aspect of the present invention, an anionic (meth) acrylic polymer flocculant is added to and mixed with dredging mud, and then a hydrolyzate of N-vinylformamide (co) polymer is added and mixed. This is a method for treating dredged mud, which comprises removing the fluidity of the dredged mud by coagulating the dredged mud and then separating water.
【０００６】本発明の請求項２の発明は、浚渫泥の塩濃
度が水中１重量％以下である事を特徴とする請求項１に
記載の浚渫泥の処理方法である。[0006] The invention of claim 2 of the present invention is the method for treating dredged mud according to claim 1, wherein the salt concentration of the dredged mud is 1% by weight or less in water.
【０００７】本発明の請求項３の発明は、凝集浚渫泥を
脱水機にかけて水を分離する事により浚渫泥の流動性を
除去する事を特徴とする請求項１ないし請求項２に記載
の浚渫泥の処理方法である。According to a third aspect of the present invention, there is provided a dredge according to any one of claims 1 to 2, wherein the fluidity of the dredged mud is removed by subjecting the flocculated dredged mud to a dehydrator to separate water. It is a method of treating mud.
【０００８】本発明の請求項４の発明は、高分子凝集剤
を添加混合するにあたり粒径０．２５ｍｍ以上の粒状高
分子凝集剤を、機械的に剪断をかけ粒径０．２５ｍｍ以
下の微細粒子として水に分散させた液を、浚渫泥に添加
する事を特徴とする請求項１ないし請求項３に記載の浚
渫泥の処理方法である。According to a fourth aspect of the present invention, a particulate polymer flocculant having a particle size of 0.25 mm or more is mechanically sheared when a polymer flocculant is added and mixed. The method according to any one of claims 1 to 3, wherein a liquid dispersed in water as particles is added to the dredged mud.
【０００９】本発明の請求項５の発明は、アニオン性
（メタ）アクリル系高分子凝集剤のコロイド当量値が−
１．４〜−９．０ｍｅｑ／ｇであり分子量が４００万以
上であり、Ｎビニルホルムアミド（共）重合体の加水分
解物のコロイド当量値が２．０〜１１．０ｍｅｑ／ｇで
ある事を特徴とする請求項１ないし請求項４に記載の浚
渫泥の処理方法である。According to a fifth aspect of the present invention, the colloid equivalent value of the anionic (meth) acrylic polymer flocculant is-
1.4 to -9.0 meq / g, the molecular weight is 4,000,000 or more, and the colloid equivalent value of the hydrolyzate of N-vinylformamide (co) polymer is 2.0 to 11.0 meq / g. The method for treating dredged mud according to any one of claims 1 to 4, characterized in that:
【００１０】[0010]
【発明の実施の形態】本発明の限定の第一は、浚渫泥に
アニオン性（メタ）アクリル系高分子凝集剤を添加混合
した後、Ｎビニルホルムアミド（共）重合体の加水分解
物を添加混合して浚渫泥を凝集させ、次いで水を分離す
る事により浚渫泥の流動性を除去する事を特徴とする浚
渫泥の処理方法である。 本発明の限定の第二は、浚渫
泥の塩濃度が水中１重量％以下である事を特徴とする。
前述の如く湖沼の浚渫泥はヘドロ等を含み、その泥粒
子は部分的にアニオン性親水コロイドに被覆されている
ためか海水中の底泥はアニオン性（メタ）アクリル系高
分子凝集剤単独で凝集するのに対しカチオン性（メタ）
アクリル系高分子凝集剤を追添加する必要がある。ここ
に言うアニオン性（メタ）アクリル系高分子凝集剤とし
ては、特にアクリルアミド系高分子凝集剤が有効であ
り、ポリアクリルアミド部分加水分解物、アクリルアミ
ド・アクリル酸ナトリウム共重合物、アクリルアミド・
アクリロイルアミノアルキルスルホン酸ナトリウム共重
合物、アクリルアミド・アクリロイルアミノアルキルス
ルホン酸ナトリウム・アクリル酸ナトリウム共重合物等
をあげる事ができる。 工業的に安価である為にナトリ
ウム塩が用いられているが、カリウム塩やアンモニウム
塩でも効果的に問題が無い事は言うまでもない。 Ｎビ
ニルホルムアミド（共）重合体の加水分解物としてはポ
リＮビニルホルムアミド、Ｎビニルホルムアミド・アク
リロニトリル共重合体、Ｎビニルホルムアミド・酢酸ビ
ニル共重合体等の加水分解物が挙げられ、加水分解には
塩酸を用いることが特に好ましい。 かかるＮビニルホ
ルムアミド（共）重合体の加水分解物は他の縮合性高分
子凝集剤等とは異なり、極めて高分子量で凝集力の強い
性質を有し、強度の高い凝集浚渫泥を与える事ができ
る。DETAILED DESCRIPTION OF THE INVENTION First, a limitation of the present invention is that an anionic (meth) acrylic polymer flocculant is added to dredging mud, mixed, and then a hydrolyzate of N-vinylformamide (co) polymer is added. This is a method for treating dredged mud, which comprises mixing and aggregating dredged mud, and then removing water by removing water. A second aspect of the present invention is characterized in that the salt concentration of the dredging mud is 1% by weight or less in water.
As mentioned above, since the dredged mud of lakes contains sludge, etc., and the mud particles are partially covered with anionic hydrocolloids, the bottom mud in seawater is made of anionic (meth) acrylic polymer flocculant alone. Agglomerates but cationic (meta)
It is necessary to add an acrylic polymer flocculant. As the anionic (meth) acrylic polymer flocculant referred to herein, an acrylamide polymer flocculant is particularly effective, and polyacrylamide partial hydrolyzate, acrylamide / sodium acrylate copolymer, acrylamide /
Examples thereof include sodium acryloylaminoalkylsulfonate copolymer and acrylamide / sodium acryloylaminoalkylsulfonate / sodium acrylate copolymer. Sodium salts are used because they are industrially inexpensive, but needless to say, potassium salts and ammonium salts have no problem. Examples of the hydrolyzate of the N-vinylformamide (co) polymer include hydrolysates such as poly-N-vinylformamide, N-vinylformamide / acrylonitrile copolymer, and N-vinylformamide / vinyl acetate copolymer. It is particularly preferred to use hydrochloric acid. Unlike other condensable polymer flocculants, the hydrolyzate of the N-vinylformamide (co) polymer has an extremely high molecular weight and a property of strong cohesive force, and can give a strong cohesive dredging mud. it can.
【００１１】本発明の限定の第三は、凝集浚渫泥を脱水
機にかけて水を分離する事により浚渫泥の流動性を除去
する事を特徴とする。 凝集浚渫泥の水を分離する方法
としては各種の方法が考えられる。 例えば埋め立てに
より上澄みを排出する方法、土嚢袋に入れたりスクリー
ンで水をきる方法も実際に行われている。 しかしなが
ら、狭い敷地で効率良く水を分離するには脱水機が不可
欠であり、デハイドラム、ベルトプレス、フィルタープ
レス、スクリュウプレス等の脱水機を使用する事ができ
る。 この中でもベルトプレス、スクリュウプレスは泥
質変動に対する耐性、作業性、脱水ケーキの性状等の点
で最も好ましい脱水機である。A third limitation of the present invention is that the fluidity of the dredged mud is removed by subjecting the flocculated dredged mud to a dehydrator to separate water. Various methods can be considered as a method of separating the water of the coagulated dredging mud. For example, a method of discharging the supernatant by landfill, a method of putting the sand in a sandbag or draining the water with a screen are actually used. However, a dehydrator is indispensable for efficiently separating water on a small site, and a dehydrator such as a dehigh drum, a belt press, a filter press, and a screw press can be used. Among these, a belt press and a screw press are the most preferred dehydrators in terms of resistance to muddy fluctuation, workability, properties of a dehydrated cake, and the like.
【００１２】本発明の限定の第四は、前記高分子凝集剤
を添加混合するにあたり粒径０．２５ｍｍ以上の粒状高
分子凝集剤を、機械的に剪断をかけ粒径０．２５ｍｍ以
下の微細粒子として水に分散させた液を、浚渫泥に添加
する事を特徴とする。 市販の高分子凝集剤は粉末高分
子凝集剤と称する場合であっても最大粒径１〜２ｍｍの
顆粒状（ガラス破砕状）で市販されている。 これは微
粉であれば保存中に吸湿固結する危険性が高い事および
溶解時ママコに成りやすい事に配慮したものである。
かかる市販粒状高分子凝集剤をそのまま浚渫泥に添加し
ても凝集はしない。 しかしながら粒径０．２５ｍｍ以
下の微細粒子として水に分散させた液を浚渫泥に添加す
ると微細粒子はごく短時間で溶解し浚渫泥は凝集する。
大粒径の製品状態で保存時の吸湿固結を防止しながら、
溶解時微細粒子として水に分散させるには機械的に剪断
をかける事が必要である。 かかる性能を持つ機械はア
ーシェル株式会社よりコミトロールの商品名で市販され
ている。 コミトロールを用いればアニオン性（メタ）
アクリル系高分子凝集剤もＮビニルホルムアミド（共）
重合体加水分解物も効率良く粒状で添加しながら微細粒
子分散液を得る事ができる。 この限定は通常の如く高
分子凝集剤を水溶液として添加する方法を否定するもの
ではない。 しかしながら粒状の高分子凝集剤を溶解す
るには時間がかかり、大量の浚渫泥に対応するには溶解
設備が大がかりなものと成る。 また油あるいは塩水中
に高分子凝集剤の微細粒子を分散させた商品を用いれば
短時間で溶解でき、溶解装置をコンパクトなものとする
事ができる。 しかしながら、かかる分散型の高分子凝
集剤は分散媒による汚染を引き起こす恐れが有り、不純
物を含まぬ粉末高分子凝集剤の使用が好ましい。A fourth limitation of the present invention is that, when the polymer flocculant is added and mixed, a granular polymer flocculant having a particle size of 0.25 mm or more is mechanically sheared to form a fine particle having a particle size of 0.25 mm or less. It is characterized in that a liquid dispersed in water as particles is added to dredging mud. Even when a commercially available polymer flocculant is referred to as a powder polymer flocculant, it is commercially available in the form of granules (crushed glass) having a maximum particle size of 1 to 2 mm. This is in consideration of the fact that if the powder is fine, there is a high risk of moisture absorption and consolidation during storage, and that it tends to become mamako when dissolved.
Even if such a commercially available granular polymer flocculant is added as it is to dredging mud, flocculation does not occur. However, when a liquid dispersed in water as fine particles having a particle size of 0.25 mm or less is added to the dredged mud, the fine particles dissolve in a very short time and the dredged mud aggregates.
While preventing moisture absorption and consolidation during storage in a large particle size product state,
In order to disperse in water as fine particles upon dissolution, it is necessary to mechanically apply shearing. A machine having such performance is commercially available from Arschel Co., Ltd. under the trade name Comitrol. Anionic (meta) using Comitrol
Acrylic polymer flocculant is also N-vinylformamide (co)
A fine particle dispersion can be obtained while efficiently adding the polymer hydrolyzate in granular form. This limitation does not deny the usual method of adding a polymer flocculant as an aqueous solution. However, it takes a long time to dissolve the granular polymer flocculant, and the dissolution equipment becomes large in order to cope with a large amount of dredging mud. In addition, if a product in which fine particles of a polymer flocculant are dispersed in oil or salt water is used, dissolution can be performed in a short time, and the dissolution apparatus can be made compact. However, such a dispersion type polymer flocculant may cause contamination by a dispersion medium, and it is preferable to use a powdery polymer flocculant containing no impurities.
【００１３】本発明の限定の第五は、アニオン性（メ
タ）アクリル系高分子凝集剤のコロイド当量値が−１．
４〜−９．０ｍｅｑ／ｇであり分子量が４００万以上で
あり、Ｎビニルホルムアミド（共）重合体の加水分解物
のコロイド当量値が２．０〜１１．０ｍｅｑ／ｇである
事を特徴とする。凝集剤としてはポリアクリル酸塩より
もアクリルアミド系のアニオン性高分子凝集剤が有効で
あり適度のアニオン性基とアミド基を有する事が望まし
く前述のコロイド当量値の範囲が望ましい。 分子量は
高い方が凝集力が強く、分子量が４００万以上である事
が望ましく、４００万未満では脱水性が劣る。 Ｎビニ
ルホルムアミド（共）重合体の加水分解物から成るカチ
オン性高分子凝集剤のコロイド当量値は高い方がケーキ
含水率が下がり、流動性の無い固い性状と成る。A fifth limitation of the present invention is that the colloid equivalent value of the anionic (meth) acrylic polymer flocculant is -1.
4 to -9.0 meq / g, a molecular weight of 4,000,000 or more, and a colloid equivalent value of a hydrolyzate of N-vinylformamide (co) polymer of 2.0 to 11.0 meq / g. I do. As the coagulant, an acrylamide-based anionic polymer coagulant is more effective than polyacrylate, and preferably has an appropriate anionic group and amide group, and the above-mentioned colloid equivalent value range is preferable. The higher the molecular weight, the stronger the cohesive force, and the molecular weight is desirably 4,000,000 or more. If the molecular weight is less than 4,000,000, the dehydration property is poor. The higher the colloid equivalent value of the cationic polymer flocculant comprising a hydrolyzate of N-vinylformamide (co) polymer, the lower the cake moisture content and the harder the fluidity is.
【００１４】[0014]
【実施例】次に実施例によって、本発明を具体的に説明
するが、本発明はその要旨を超えない限り、以下の実施
例に制約されるものではない。EXAMPLES Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.
【００１５】（アニオン性高分子凝集剤組成）表−１に
本発明の実施例で用いるアニオン性高分子凝集剤の組成
を記載する。全て、市販粒状凝集剤であり、最大粒径
１．２ｍｍである。(Composition of anionic polymer flocculant) Table 1 shows the composition of the anionic polymer flocculant used in Examples of the present invention. All are commercial particulate flocculants with a maximum particle size of 1.2 mm.
【００１６】[0016]
【表１】 [Table 1]
【００１７】（カチオン性高分子凝集剤組成）表−２に
本発明の実施例で用いるカチオン性高分子凝集剤の組成
を記載する。全て、市販粒状凝集剤であり、最大粒径
２．０ｍｍである。(Composition of cationic polymer flocculant) Table 2 shows the composition of the cationic polymer flocculant used in Examples of the present invention. All are commercially available granular coagulants with a maximum particle size of 2.0 mm.
【００１８】[0018]
【表２】 [Table 2]
【００１９】（実施例ー１）某湖の底泥（懸濁物濃度２
５重量％、塩濃度０．４重量％）をポンプ浚渫し、表−
１および表−２記載の高分子凝集剤をコミトロールによ
り連続的に０．２重量％の水分散液として滞留時間１時
間の貯留漕に貯留し、該貯留漕より高分子凝集剤水溶液
を逐次添加混合し、富国工業株式会社製のトロンメル付
きスクリュウプレスにより脱水した。 結果を表−３に
示す。 表−３記載の凝集剤添加量はアニオン性および
カチオン性の両凝集剤ともに浚渫泥の有り姿あたり、す
なわち対液あたりの添加量である。(Example-1) Sediment of a certain lake (suspension concentration 2)
5% by weight, salt concentration 0.4% by weight)
Polymer flocculants described in Table 1 and Table 2 were continuously stored as a 0.2% by weight aqueous dispersion in a storage tank having a residence time of 1 hour by a control roll, and the aqueous polymer flocculant aqueous solution was sequentially discharged from the storage tank. The mixture was added, mixed, and dehydrated using a screw press with trommel manufactured by Fukoku Kogyo Co., Ltd. The results are shown in Table-3. The addition amount of the flocculant shown in Table 3 is the amount of the dredging sludge in both the anionic and cationic flocculants, that is, the amount added per liquid.
【００２０】[0020]
【表３】 [Table 3]
【００２１】[0021]
【発明の効果】本発明の凝集方法により、淡水湖沼にお
ける浚渫泥の凝集脱水処理が効率良く行われ、浚渫泥の
減量固形化による外部搬出作業を容易にする事が狭い敷
地においても簡易に行う事ができる。According to the coagulation method of the present invention, the coagulation and dewatering of the dredged mud in a freshwater lake is efficiently performed, and the work to be carried out outside by reducing and solidifying the dredged mud is easily performed even on a narrow site. Can do things.
Claims (5)
高分子凝集剤を添加混合した後、Ｎビニルホルムアミド
（共）重合体の加水分解物から成るカチオン性高分子凝
集剤を添加混合して浚渫泥を凝集させ、次いで水を分離
する事により浚渫泥の流動性を除去する事を特徴とする
浚渫泥の処理方法。1. An anionic (meth) acrylic polymer flocculant is added to and mixed with dredging mud, and then a cationic polymer flocculant comprising a hydrolyzate of N-vinylformamide (co) polymer is added and mixed. A method for treating dredged mud, comprising aggregating dredged mud and then separating water to remove fluidity of the dredged mud.
る事を特徴とする請求項１に記載の浚渫泥の処理方法。2. The method for treating dredging mud according to claim 1, wherein the salt concentration of the dredging mud is 1% by weight or less in water.
る事により浚渫泥の流動性を除去する事を特徴とする請
求項１ないし請求項２に記載の浚渫泥の処理方法。3. The method for treating dredged mud according to claim 1, wherein the fluidity of the dredged mud is removed by subjecting the flocculated dredged mud to a dehydrator to separate water.
径０．２５ｍｍ以上の粒状高分子凝集剤を、機械的に剪
断をかけ粒径０．２５ｍｍ以下の微細粒子として水に分
散させた液を、浚渫泥に添加する事を特徴とする請求項
１ないし請求項３に記載の浚渫泥の処理方法。4. A liquid in which a particulate polymer flocculant having a particle size of 0.25 mm or more is mechanically sheared to disperse in water as fine particles having a particle size of 0.25 mm or less upon adding and mixing the polymer flocculant. The method for treating dredged mud according to claim 1, wherein the water is added to the dredged mud.
集剤のコロイド当量値が−１．４〜−９．０ｍｅｑ／ｇ
であり分子量が４００万以上であり、Ｎビニルホルムア
ミド（共）重合体の加水分解物のコロイド当量値が２．
０〜１１．０ｍｅｑ／ｇである事を特徴とする請求項１
ないし請求項４に記載の浚渫泥の処理方法。5. The colloid equivalent value of the anionic (meth) acrylic polymer flocculant is -1.4 to -9.0 meq / g.
And a molecular weight of 4,000,000 or more, and a colloid equivalent value of a hydrolyzate of N-vinylformamide (co) polymer of 2.
2. The amount is from 0 to 11.0 meq / g.
A method for treating dredging mud according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9013267A JPH10192899A (en) | 1997-01-09 | 1997-01-09 | Method for treating dredged sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9013267A JPH10192899A (en) | 1997-01-09 | 1997-01-09 | Method for treating dredged sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10192899A true JPH10192899A (en) | 1998-07-28 |
Family
ID=11828453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9013267A Pending JPH10192899A (en) | 1997-01-09 | 1997-01-09 | Method for treating dredged sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10192899A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008055342A (en) * | 2006-08-31 | 2008-03-13 | Kadoya Kogyo Kk | Sand-like inorganic flocculant for batch treatment of emulsified water such as cement |
| JP2008114142A (en) * | 2006-11-02 | 2008-05-22 | Shimizu Corp | Slurry dewatering method and apparatus, and suspension treatment system |
| JP2010214268A (en) * | 2009-03-16 | 2010-09-30 | Tosoh Corp | Method for recovering sludge from flue gas treatment wastewater |
| WO2021002243A1 (en) * | 2019-07-03 | 2021-01-07 | 帝人フロンティア株式会社 | Sludge dewatering agent |
| CN113371976A (en) * | 2021-06-08 | 2021-09-10 | 中交上海航道勘察设计研究院有限公司 | Sludge dewatering curing agent and resource utilization method |
-
1997
- 1997-01-09 JP JP9013267A patent/JPH10192899A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008055342A (en) * | 2006-08-31 | 2008-03-13 | Kadoya Kogyo Kk | Sand-like inorganic flocculant for batch treatment of emulsified water such as cement |
| JP2008114142A (en) * | 2006-11-02 | 2008-05-22 | Shimizu Corp | Slurry dewatering method and apparatus, and suspension treatment system |
| JP2010214268A (en) * | 2009-03-16 | 2010-09-30 | Tosoh Corp | Method for recovering sludge from flue gas treatment wastewater |
| WO2021002243A1 (en) * | 2019-07-03 | 2021-01-07 | 帝人フロンティア株式会社 | Sludge dewatering agent |
| CN113371976A (en) * | 2021-06-08 | 2021-09-10 | 中交上海航道勘察设计研究院有限公司 | Sludge dewatering curing agent and resource utilization method |
| CN113371976B (en) * | 2021-06-08 | 2024-02-02 | 中交上海航道勘察设计研究院有限公司 | Sludge dewatering curing agent and recycling method |
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