JPH06285497A - How to prevent sludge particles from floating - Google Patents
How to prevent sludge particles from floatingInfo
- Publication number
- JPH06285497A JPH06285497A JP5086700A JP8670093A JPH06285497A JP H06285497 A JPH06285497 A JP H06285497A JP 5086700 A JP5086700 A JP 5086700A JP 8670093 A JP8670093 A JP 8670093A JP H06285497 A JPH06285497 A JP H06285497A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- granular cotton
- water
- sludge particles
- fibers
- 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
Landscapes
- Treatment Of Sludge (AREA)
Abstract
(57)【要約】
【目的】 簡易な手段で湖沼などの水底に堆積している
ヘドロ粒子の浮遊を防止する。
【構成】 水底２に堆積しているヘドロ層３に、無機質
繊維の粒状綿１，１…を投入し、この粒状綿１，１…の
繊維間の毛管内にヘドロ粒子を捕捉させる。
【効果】 ヘドロ層３の上面に形成される粒状綿１，
１，…の集積層４で、ヘドロ粒子の舞い上がりを防止す
るとともに、ヘドロ粒子は徐々に粒状綿１，１，…の繊
維間の毛管内に捕捉され、その浮遊を防止できる。
(57) [Summary] [Purpose] To prevent the floating of sludge particles accumulated on the bottom of water such as lakes by simple means. [Structure] Granular cotton 1,1 ... Of inorganic fibers is put into the sludge layer 3 accumulated on the water bottom 2, and sludge particles are trapped in the capillaries between the fibers of the granular cotton 1, 1. [Effect] Granular cotton 1, which is formed on the upper surface of the sludge layer 3,
The accumulation layer 4 of 1, ... Prevents sludge particles from rising, and the sludge particles are gradually trapped in the capillaries between the fibers of the granular cotton 1, 1 ,.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、湖沼などの水底に堆積
しているヘドロ粒子の浮遊防止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 preventing sludge particles from floating on the bottom of water such as lakes and marshes.
【０００２】[0002]
【従来の技術】湖沼などの水底に堆積しているヘドロ
は、一般に毒性の強いものでない限り、堆積した状態の
ままであればさほどの実害はない。ヘドロは主にスラッ
ジなどの鉱物の廃棄物や有機物のきわめて細かい粒子で
構成されており、水面が荒れると容易に水中に舞い上が
り、かつ沈降しにくいため、漁業などに深刻な影響を与
えている。2. Description of the Related Art Sludge deposited on the bottom of water such as lakes and marshes does not cause much damage if it remains deposited unless it is generally highly toxic. Sludge is composed mainly of extremely fine particles of mineral waste such as sludge and organic matter, and easily rises into the water when the surface of the water is rough and is difficult to settle, which seriously affects the fishing industry.
【０００３】このため、環境保全の観点からもヘドロの
処理は、今日的な解決課題の一つとして社会問題化して
いる。従来、ヘドロの処理方法として浚渫が一般的であ
るが、この場合、堀り出したヘドロを処理施設に運び込
み、そこで所定の処理を行っている。処理施設に運ばれ
たヘドロは、凝集剤を加えて凝集させ、圧搾などによる
減容、乾燥を行い、埋め立てなどに使用しているのが一
般的である。Therefore, from the viewpoint of environmental protection, sludge treatment has become a social problem as one of the problems to be solved today. Conventionally, dredging is generally used as a treatment method for sludge, but in this case, the sludge that has been dug out is carried to a treatment facility where a predetermined treatment is performed. The sludge transported to the treatment facility is generally used for landfilling after adding a coagulant to coagulate it, reducing the volume by squeezing, drying, and so on.
【０００４】[0004]
【発明が解決しようとする課題】しかし、このような従
来の処理方法は効率が悪く、経費もかさむなどの問題が
ある。一方、浚渫を行わず、海や湖沼、池などに直接凝
集剤を投入してヘドロを凝集させることも考えられる
が、技術的にも経済的にも実用性に乏しいものである。However, such a conventional processing method has problems of low efficiency and high cost. On the other hand, it is possible to directly add a coagulant to the sea, lakes, ponds, etc. to agglomerate sludge without dredging, but it is technically and economically impractical.
【０００５】本発明は、このような状況に鑑みてなされ
たもので、簡易手段でヘドロ粒子の水中への浮遊を防止
する方法を提供することを目的とするものである。The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for preventing sludge particles from floating in water by a simple means.
【０００６】[0006]
【課題を解決するための手段】本発明は、このような目
的を達成するために、湖沼などの水底に堆積しているヘ
ドロに無機質繊維の粒状綿を投入し、この粒状綿の繊維
間の毛管内にヘドロ粒子を捕捉させて粒状塊とすること
を特徴とするものである。In order to achieve such an object, the present invention introduces inorganic cotton granular cotton into sludge accumulated on the bottom of water such as lakes and marshes, and It is characterized in that the sludge particles are captured in the capillaries to form a granular mass.
【０００７】また、無機繊維の粒状綿は、粒径が１０〜
３０ｍｍ、密度が１５０〜３００ｋｇ／ｍ3 、嵩密度が
１００〜２５０ｋｇ／ｍ3 、平均繊維径が４〜６μｍで
あることを特徴とするものである。Inorganic fiber granular cotton has a particle size of 10 to 10.
30 mm, the density is 150 to 300 kg / m 3 , the bulk density is 100 to 250 kg / m 3 , and the average fiber diameter is 4 to 6 μm.
【０００８】[0008]
【作用】本発明によれば、水底に堆積しているヘドロ
に、無機質繊維の粒状綿をヘドロ層の厚さの３０〜７０
％程になるように投入し、その自然沈降によりヘドロ層
の上面を覆う粒状綿の層を順次形成し、ヘドロ粒子が水
中に舞い上がるのを防止できる。さらに、時の経過とと
もに、水の流動によってヘドロ粒子は徐々に粒状綿の繊
維間の毛管内に捕捉され、ヘドロ粒子の浮遊を防止でき
る。一旦、捕捉されたヘドロ粒子は、容易に粒状綿から
解放されず、水中に舞い上がり浮遊することがなくな
る。According to the present invention, the sludge accumulated on the bottom of the water is coated with granular cotton of inorganic fibers having a thickness of 30 to 70 of the sludge layer thickness.
% So that the natural sedimentation sequentially forms a layer of granular cotton that covers the upper surface of the sludge layer, and prevents sludge particles from soaring into the water. Furthermore, with the passage of time, the sludge particles are gradually captured by the flow of water in the capillaries between the fibers of the granular cotton, and the sludge particles can be prevented from floating. Once trapped, the sludge particles are not easily released from the granular cotton and do not fly up and float in the water.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を参照しながら
説明する。図１は本発明の使用例を示す概略説明図であ
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view showing an example of use of the present invention.
【００１０】図において、１は無機質繊維の粒状綿であ
り、その粒径は１０〜３０ｍｍのものが好ましく、個々
の粒状綿１の密度が１５０〜３００ｋｇ／ｍ3 のものが
適当である。このような粒状綿１の嵩密度は１００〜２
５０ｋｇ／ｍ3 である。また平均繊維径は４〜６μｍ程
度のものが好ましい。In the figure, 1 is a granular cotton of inorganic fibers, and the particle diameter thereof is preferably 10 to 30 mm, and the granular cotton 1 having a density of 150 to 300 kg / m 3 is suitable. The bulk density of such granular cotton 1 is 100 to 2
It is 50 kg / m 3 . The average fiber diameter is preferably about 4 to 6 μm.
【００１１】この粒状綿１の具体的な材質としては、ロ
ックウール、アルミナ繊維、セラミック繊維などの無機
質繊維が最適であるが、結晶質が比較的脆いものよりも
非結晶質で柔軟性に富むものが好ましく、コスト面から
は比較的安価なロックウールが好ましいものである。As a concrete material for the granular cotton 1, inorganic fibers such as rock wool, alumina fibers and ceramic fibers are most suitable, but the crystalline material is amorphous and rich in flexibility rather than relatively brittle. Preferred is rock wool, which is relatively inexpensive in terms of cost.
【００１２】本発明に用いる粒状綿１の密度および繊維
径については、前記のとおりであるが、粒状綿１の密度
が低過ぎると繊維間の毛管の連続性が増し、また毛管径
も大きくなるので、ヘドロ粒子が毛管を容易に通り抜け
てしまう。一方、粒状綿１の密度が高過ぎると繊維間の
毛管の連続性が低下し、ヘドロ粒子を効率よく捕捉でき
なくなり、また捕捉に適度な水の流れ抵抗が必要である
ことを考慮し、粒状綿１の密度および繊維径を選定する
ことが大切である。The density and fiber diameter of the granular cotton 1 used in the present invention are as described above, but if the density of the granular cotton 1 is too low, the continuity of the capillaries between the fibers is increased and the capillary diameter is also large. As a result, sludge particles easily pass through the capillaries. On the other hand, if the density of the granular cotton 1 is too high, the continuity of the capillaries between the fibers is reduced, sludge particles cannot be efficiently captured, and in consideration of the fact that an appropriate water flow resistance is required for capture, It is important to select the density and fiber diameter of cotton 1.
【００１３】さらに、粒状綿１として柔軟性に富む無機
質繊維を用いることにより、その繊維が相互に複雑にか
らみあい、繊維間の毛管が複雑な形状となる。このた
め、粒状綿１の密度および繊維径を適切に選定すること
により毛管が適度に連続する。その結果、図２に模式的
に示したように迷路のようにいりくんだ構成の毛管とな
る。したがって、一旦捕捉されたヘドロ粒子は毛管に保
持され、容易に粒状綿１から解放できなくなる。Further, by using the highly flexible inorganic fiber as the granular cotton 1, the fibers are intricately entangled with each other and the capillaries between the fibers have a complicated shape. Therefore, by appropriately selecting the density and fiber diameter of the granular cotton 1, the capillaries are appropriately continuous. As a result, a capillary having a configuration like a maze as schematically shown in FIG. 2 is obtained. Therefore, the once trapped sludge particles are retained in the capillaries and cannot be easily released from the granular cotton 1.
【００１４】粒状綿１の粒径に関しては、毛管の総延長
寸法をできるだけ長くとれるようにすること、所望の密
度のものが得られやすいこと、充填性などを考慮するこ
とが必要である。Regarding the particle size of the granular cotton 1, it is necessary to consider the total length of the capillaries to be as long as possible, to easily obtain a desired density, and the filling property.
【００１５】本発明の場合、粒状綿１は長期間水に浸漬
され続けられることによる解繊を防ぐため、結合剤やカ
ップリング剤を添加すると効果的である。この結合剤と
しては、耐水性に優れたものが好ましく、例えばフェノ
ール樹脂などを用いるとよい。カップリング剤として
は、シランカップリング剤、例えばメチルトリシラン、
ビニルトリエトキシシラン、エチル−トリメトキシシラ
ンなどを用いるとよい。In the case of the present invention, it is effective to add a binder or a coupling agent in order to prevent the defibration of the granular cotton 1 caused by being continuously immersed in water for a long period of time. As the binder, one having excellent water resistance is preferable, and for example, a phenol resin may be used. As the coupling agent, a silane coupling agent such as methyltrisilane,
It is preferable to use vinyltriethoxysilane, ethyl-trimethoxysilane, or the like.
【００１６】次に、本発明の使用例を図１に基づいて説
明すると、２は湖沼の水底を示し、この水底２にヘドロ
層３が堆積している。このヘドロ層３の層厚に対し、粒
状綿１が３０〜７０％程度の厚みになるように投入し、
自然沈降によりヘドロ層３の上面を覆う粒状綿１の集積
層４を形成する。この集積層４は、ヘドロ層３の上面形
状に応じて、その表面形状に凹凸が生じるが、水の流れ
などにより順次均一な表面形状に変化して行き、この集
積層４によりヘドロ粒子が水中５に舞い上がるのを防止
できるとともに、水の流動によってヘドロ粒子は徐々に
粒状綿１の繊維間の毛管内に捕捉され、ヘドロ粒子の浮
遊を防止できる。Next, an example of use of the present invention will be described with reference to FIG. 1. Reference numeral 2 denotes a water bottom of a lake, and a sludge layer 3 is deposited on the water bottom 2. The granular cotton 1 was added so that the thickness of the sludge layer 3 was about 30 to 70%,
An accumulation layer 4 of granular cotton 1 covering the upper surface of the sludge layer 3 is formed by natural sedimentation. The accumulated layer 4 has irregularities in the surface shape according to the shape of the upper surface of the sludge layer 3, but the accumulated layer 4 gradually changes into a uniform surface shape due to the flow of water, etc. 5, the sludge particles are gradually captured by the flow of water in the capillaries between the fibers of the granular cotton 1, and the sludge particles can be prevented from floating.
【００１７】図３は、本発明の効果として透視度と濁度
との関係を示す図であり、これは本発明者らが行った実
験により得たものである。FIG. 3 is a diagram showing the relationship between the transparency and the turbidity as an effect of the present invention, which is obtained by an experiment conducted by the present inventors.
【００１８】実験は次の方法により行った。まず、ＪＩ
Ｓ−Ａ９５０４に規定されているロックウールを造粒す
ることにより、粒径約１０〜３０ｍｍのロックウールの
粒状綿を得た。この結果、得られた粒状綿の嵩密度は約
１２０ｋｇ／ｍ3 であった。次に、湖沼から採取したヘ
ドロ１００ｍｌをビーカーにとり、これに水を加えて８
００ｍｌとし、これを撹拌した後、上記ロックウールの
粒状綿を約１０ｇ投入し、約２０ＨZ で２４時間振盪し
た。その後、透視度計（柴田科学器械工業株式会社製の
品目コード・ＣＯＤＥ８０５３−０５１）を用いて透視
度を測定した。なお、粒状綿を投入しないものについて
も同様な条件で測定した。The experiment was conducted by the following method. First, JI
Granules of rock wool as specified in S-A9504 were obtained to obtain rock wool granular cotton having a particle diameter of about 10 to 30 mm. As a result, the bulk density of the obtained granular cotton was about 120 kg / m 3 . Next, take 100 ml of sludge collected from the lake in a beaker, add water to it, and add 8
And 100 ml, after stirring it, a granular cotton of the rock wool and about 10g poured and shaken at about 20H Z 24 hours. Then, the transparency was measured using a fluorometer (item code CODE8053-051 manufactured by Shibata Scientific Instruments Co., Ltd.). In addition, the measurement was performed under the same conditions even when the granular cotton was not added.
【００１９】この結果、粒状綿を投入した場合の透視度
は２９．５ｃｍであるのに対し、粒状綿を投入しない場
合の透視度は１１．５ｃｍであることが確認できた。こ
の透視度と濁度との関係は図３に示すとおりであり、ロ
ックウールの粒状綿の使用により濁度の改善効果が認め
られ、ヘドロ粒子がこの粒状綿に捕捉されていることが
確認できた。As a result, it was confirmed that the transparency when the granular cotton was added was 29.5 cm, whereas the transparency when the granular cotton was not added was 11.5 cm. The relationship between the transparency and the turbidity is as shown in FIG. 3, and the effect of improving the turbidity was recognized by the use of rock wool granular cotton, and it was confirmed that the sludge particles were captured by the granular cotton. It was
【００２０】[0020]
【発明の効果】以上説明したように、本発明によれば、
無機質繊維の粒状綿をヘドロの堆積している湖沼などの
水底に投入するというきわめて簡易な手段によって、ヘ
ドロが舞い上がり、浮遊するのを防止できる。As described above, according to the present invention,
It is possible to prevent sludge from soaring and floating by a very simple means of throwing granular cotton of inorganic fiber to the bottom of a lake where sludge is accumulated.
【図１】本発明の使用例を示す概略説明図である。FIG. 1 is a schematic explanatory view showing an example of use of the present invention.
【図２】粒状綿内部の毛管の連続状況を模式的に示す模
式図である。FIG. 2 is a schematic diagram schematically showing a continuous state of capillaries inside granular cotton.
【図３】本発明による透視度と濁度との関係を示す図で
ある。FIG. 3 is a diagram showing a relationship between transparency and turbidity according to the present invention.
１ 粒状綿 ２ 湖沼の水底 ３ ヘドロ層 ４ 粒状綿の集積層 1 granular cotton 2 water bottom of lake 3 sludge layer 4 accumulated layer of granular cotton
Claims (2)
無機質繊維の粒状綿を投入し、この粒状綿の繊維間の毛
管内にヘドロ粒子を捕捉させて粒状塊とすることを特徴
とするヘドロ粒子の浮遊防止方法。1. A method in which granular cotton of inorganic fibers is put into sludge accumulated on the bottom of water such as a lake, and sludge is trapped in the capillaries between the fibers of the granular cotton to form a granular mass. How to prevent sludge particles from floating.
０ｍｍ、密度が１５０〜３００ｋｇ／ｍ3 、嵩密度が１
００〜２５０ｋｇ／ｍ3 、平均繊維径が４〜６μｍであ
ることを特徴とする請求項１記載のヘドロ粒子の浮遊防
止方法。2. The inorganic fiber granular cotton has a particle size of 10 to 3
0 mm, density 150-300 kg / m 3 , bulk density 1
The method for preventing floating of sludge particles according to claim 1, wherein the method has an average fiber diameter of 0 to 250 kg / m 3 and an average fiber diameter of 4 to 6 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5086700A JP2618801B2 (en) | 1993-03-22 | 1993-03-22 | How to prevent sludge particles from floating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5086700A JP2618801B2 (en) | 1993-03-22 | 1993-03-22 | How to prevent sludge particles from floating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06285497A true JPH06285497A (en) | 1994-10-11 |
| JP2618801B2 JP2618801B2 (en) | 1997-06-11 |
Family
ID=13894225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5086700A Expired - Lifetime JP2618801B2 (en) | 1993-03-22 | 1993-03-22 | How to prevent sludge particles from floating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2618801B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003531715A (en) * | 2000-03-06 | 2003-10-28 | アクアブロック・リミテッド | Composite particles and method of using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4883090A (en) * | 1972-02-10 | 1973-11-06 | ||
| JPS5062869A (en) * | 1973-10-09 | 1975-05-29 | ||
| JPS5613099A (en) * | 1979-07-10 | 1981-02-07 | Nichireki Chem Ind Co Ltd | Treating method of sludge |
| JPH0483085A (en) * | 1990-07-25 | 1992-03-17 | Taisei Corp | Disposal of mud |
-
1993
- 1993-03-22 JP JP5086700A patent/JP2618801B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4883090A (en) * | 1972-02-10 | 1973-11-06 | ||
| JPS5062869A (en) * | 1973-10-09 | 1975-05-29 | ||
| JPS5613099A (en) * | 1979-07-10 | 1981-02-07 | Nichireki Chem Ind Co Ltd | Treating method of sludge |
| JPH0483085A (en) * | 1990-07-25 | 1992-03-17 | Taisei Corp | Disposal of mud |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003531715A (en) * | 2000-03-06 | 2003-10-28 | アクアブロック・リミテッド | Composite particles and method of using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2618801B2 (en) | 1997-06-11 |
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