JPH0259095A - Method for improving water quality and deposit - Google Patents
Method for improving water quality and depositInfo
- Publication number
- JPH0259095A JPH0259095A JP20933788A JP20933788A JPH0259095A JP H0259095 A JPH0259095 A JP H0259095A JP 20933788 A JP20933788 A JP 20933788A JP 20933788 A JP20933788 A JP 20933788A JP H0259095 A JPH0259095 A JP H0259095A
- Authority
- JP
- Japan
- Prior art keywords
- water
- peroxide
- sand
- sludge
- layer
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 47
- XXQBEVHPUKOQEO-UHFFFAOYSA-N potassium superoxide Chemical compound [K+].[K+].[O-][O-] XXQBEVHPUKOQEO-UHFFFAOYSA-N 0.000 claims abstract description 32
- 150000002978 peroxides Chemical class 0.000 claims abstract description 26
- 239000004343 Calcium peroxide Substances 0.000 claims abstract description 16
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000019402 calcium peroxide Nutrition 0.000 claims abstract description 16
- 239000013049 sediment Substances 0.000 claims description 16
- 239000002195 soluble material Substances 0.000 claims description 9
- 239000010802 sludge Substances 0.000 abstract description 49
- 239000000463 material Substances 0.000 abstract description 22
- 239000008187 granular material Substances 0.000 abstract description 10
- 239000000843 powder Substances 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 8
- 238000010828 elution Methods 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 abstract 1
- 239000001768 carboxy methyl cellulose Substances 0.000 abstract 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 abstract 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 abstract 1
- 229940105329 carboxymethylcellulose Drugs 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 46
- 230000000694 effects Effects 0.000 description 9
- 239000002344 surface layer Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 235000015170 shellfish Nutrition 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、河川、湖沼、内湾、浅海域等の水底に堆積す
るヘドロ等の軟弱な汚泥層等の底質及び貧酸素状態の底
層水を浄化または改善する際に、水中汚濁や水中ｐｌ（
値の急激な上昇等により魚貝類や藻類等に悪影響を及ぼ
さない水質及び底質の改善方法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to bottom sediments such as soft sludge layers such as sludge deposited on the bottom of rivers, lakes, inner bays, shallow sea areas, etc., and bottom water in anoxic conditions. When purifying or improving water pollution and water PL (
This relates to a method for improving water quality and bottom sediment that does not adversely affect fish, shellfish, algae, etc. due to sudden increases in water levels.
従来、河川、湖沼、内湾、浅海域等の水底に堆積する軟
弱な汚泥層の底質改良のため、その汚泥層上に対し過酸
化カルシウム、過酸化カリウム等の過酸化物を撒布する
ことは、軟弱汚泥層内へ酸素を供給し、底質の改良に非
常に効果があり、また、その軟弱汚泥からの栄養塩類物
質である燐、窒素等や、有機物、質の溶出を抑制したり
、重金属類等の水底汚泥中での固定化に非常に効果のあ
ることは公知の事実である。Conventionally, in order to improve the bottom quality of the soft sludge layer that accumulates on the bottom of rivers, lakes, inner bays, shallow waters, etc., it has not been possible to spray peroxides such as calcium peroxide and potassium peroxide onto the sludge layer. , supplies oxygen into the soft sludge layer, is very effective in improving the bottom sediment, and also suppresses the elution of nutrient salts such as phosphorus, nitrogen, etc., and organic matter, from the soft sludge. It is a well-known fact that it is very effective in immobilizing heavy metals and the like in underwater sludge.
しかしながら、上記過酸化物等を水中に撒布すると、水
中での懸濁や、懸濁水の周辺水域への拡散や水中ｐＨ値
の急激な上昇等による魚貝類や藻類等への悪影響の問題
が生じている。However, when the above-mentioned peroxides and the like are sprayed into water, problems arise, such as suspension in the water, diffusion of the suspended water into surrounding waters, and a sudden increase in the pH value of the water, which can have an adverse effect on fish, shellfish, algae, etc. ing.
また、これら悪化した水質及び底質の浄化及び改善のた
め、あるいは漁場造成や、復旧のために、汚泥層上に覆
砂が有効であることも公知の事実である。It is also a well-known fact that covering the sludge layer with sand is effective for purifying and improving the deteriorated water quality and bottom sediment, or for creating and restoring fishing grounds.
しかしながら、一般にこのような水質及び底質環境の悪
化した水域には、軟弱な汚泥の堆積が著しく、覆砂して
も覆砂した砂が汚泥中に埋没したり、たとえ覆砂用の砂
がこれら堆積汚泥上に一旦載っても、覆砂層とその下の
汚泥層とが上下逆転して入れ換り、覆砂した砂が汚泥中
に埋没してしまったり、非常に上手に覆砂がなされたと
しても、覆砂層の下層部公約２０から５０％程度が汚泥
層と混り合った状態で安定するとされているため、この
混合部分を除いた覆砂層を達成するためには計画覆砂層
の約２倍程度の覆砂用の砂材を覆砂することになり、非
常に余分な施工費を要し、かつ作業能率が悪いという問
題があった。However, in general, in such waters where the water quality and bottom sediment environment have deteriorated, there is a significant accumulation of soft sludge, and even if the sand is covered with sand, the covered sand may be buried in the sludge, or even if the sand used for sand covering is Once placed on top of these accumulated sludge, the sand-covered layer and the sludge layer below it are turned upside down and replaced, and the covered sand may be buried in the sludge, or the sand-covered layer may not be covered very well. However, it is said that approximately 20 to 50% of the lower part of the sand-covering layer is stable when mixed with the sludge layer, so in order to achieve a sand-covering layer that excludes this mixed part, it is necessary to change the planned sand-covering layer. Approximately twice the amount of sand material used for sand covering was required for sand covering, which resulted in problems such as extremely extra construction costs and poor work efficiency.
本発明は、前記従来の問題点を解消するためになされた
ものであり、水底の軟弱な汚泥層の底質改良用の過酸化
カルシウム、過酸化カリウム等の過酸化物を水中懸濁や
水中ｐＨ値の急激な上昇なしに撒布可能で、一方、底質
改善用の覆砂時の覆砂支持効果を発揮させて覆砂工費の
削減をはかりうる水質及び底質の改善方法を提供するこ
とを目的としたものである。The present invention was made in order to solve the above-mentioned conventional problems, and uses peroxides such as calcium peroxide and potassium peroxide for improving the bottom quality of the soft sludge layer at the bottom of the water by suspending or submerging them in water. To provide a method for improving water quality and bottom quality, which can be spread without a sudden increase in pH value, and can reduce sand covering costs by exhibiting a sand covering effect during sand covering for bottom quality improvement. The purpose is to
上記の目的を達成するための本発明の水質及び底質の改
善方法は、所定時間後に溶解する、例えばカーボン・メ
チル・セルローズ等の水溶性部材内の中空部内に過酸化
カルシウム、過酸化カリウム等の過酸化物を充填して、
それを軟弱汚泥等の水底に撒布することを特徴としてお
り、これらを水中に撒布する際には、過酸化物は水溶性
部材内に封じこめられているので水中での懸濁や水中ｐ
Ｈ値の急激な上昇が起きず、水溶性部材が所定の時間経
過後に水に溶は始めると徐々に過酸化物が水と反応して
水中及び底泥中に酸素を供給しはじめ、底層貧酸素氷塊
の解消を図ると共に、底泥からの栄養塩類物質や有機物
質の溶出を抑制したり、重金属類等の底泥中での固定化
をはかることができる。The method for improving water quality and sediment of the present invention to achieve the above object is to store calcium peroxide, potassium peroxide, filled with peroxide,
It is characterized by spreading it on the bottom of water such as soft sludge.
If a sudden increase in H value does not occur and the water-soluble material begins to dissolve in water after a predetermined period of time, peroxide gradually reacts with water and begins to supply oxygen to the water and bottom mud, causing bottom layer depletion. In addition to eliminating oxygen ice blocks, it is possible to suppress the elution of nutrients and organic substances from the bottom mud, and to immobilize heavy metals and other substances in the bottom mud.
また、所定時間後に溶解する棒状の水溶性部材内に過酸
化カルシウム、過酸化カリウム等の過酸化物を充填して
水底の軟弱汚泥層に撒布の後に、その上に覆砂を行なう
ことも本発明の特徴であり、これにより覆砂時に覆砂用
の砂材が、汚泥中に埋没したり、汚泥と上下に入れ換っ
たりしなくなり、覆砂の施工費が低減することになると
共に、さらに覆砂による底質改良と、過酸化物による覆
砂層下の底泥への酸素の供給によって底泥からの栄養塩
類物質や有機物質の溶出を長期間抑制することによる底
質改良とが併せて行なわれることになり、覆砂層の底質
改善効果を持続することができる。It is also recommended to fill a rod-shaped water-soluble material that dissolves after a certain period of time with peroxides such as calcium peroxide or potassium peroxide, and then spread it over the soft sludge layer at the bottom of the water, and then cover the top with sand. This is a feature of the invention, which prevents the sand material for sand covering from being buried in the sludge or replacing it vertically with the sludge during sand covering, which reduces the construction cost of sand covering, and Furthermore, the bottom sediment is improved by sand capping and by supplying oxygen to the bottom mud under the sand capping layer using peroxide, which suppresses the elution of nutrients and organic substances from the bottom mud for a long period of time. As a result, the bottom quality improvement effect of the sand covering layer can be maintained.
以下図面を参照して本発明の水質及び底質の改善方法を
適用する実施例について説明するが、第１図の実施例１
においては、水底の軟弱な汚泥ｆｉｌの上に砂材３を覆
砂する場合を示しており、その覆砂前に汚泥層１の上に
、第５−Ａ図で示すごとき所定時間後に溶解する棒状の
水溶性部材２内に過酸化物を充填し第２図のごとく撒布
により敷きつめた後、砂材３の覆砂を行なっている。Examples to which the method for improving water quality and bottom sediment of the present invention is applied will be described below with reference to the drawings.
Figure 5 shows the case of covering the soft sludge fil on the water bottom with the sand material 3, and before covering the sand material, the sand material 3 is placed on the sludge layer 1 and dissolved after a predetermined time as shown in Figure 5-A. After filling the rod-shaped water-soluble member 2 with peroxide and spreading it as shown in FIG. 2, the sand material 3 is covered with sand.
これにより棒状の水溶性部材２は、覆砂支持材の機能を
果すが、その材質としては、例えばカーボン・メチル・
セルローズ等からなり、０゜５から３．０ ｃｍ径で、
長さが０．５から３．ｃｍ径度のものを使用するが、こ
れらの寸法は使用目的や水域に応じて適宜選定されるも
のである。As a result, the rod-shaped water-soluble member 2 functions as a sand-covering support material, but its material may be, for example, carbon, methyl,
Made of cellulose, etc., with a diameter of 0°5 to 3.0 cm,
The length is 0.5 to 3. cm diameter is used, but these dimensions are appropriately selected depending on the purpose of use and the water area.
また、上記水溶性部材２の材質は、本実施例のカーボン
・メチル・セルローズ以外のものでも良いが、その使用
目的、施工期間や、効果等を考慮してその水溶終了の期
間を２から３日間程度から１ケ月から２ケ月間程度とな
るように適宜に選定するものとする。The water-soluble member 2 may be made of a material other than carbon, methyl, or cellulose as used in this embodiment, but the period for completion of water-soluble material should be set from 2 to 3 in consideration of the purpose of use, construction period, effects, etc. The period shall be selected as appropriate, from about 1 day to about 1 to 2 months.
このような棒状の水溶性部材２の内部に、第５−Ｂ図、
第５−Ｃ図、第５−Ｄ図及び第５Ｅ図に示すごとく過酸
化カルシウム、過酸化カリウム等の過酸化物の粉末また
は顆粒５を充填しておくことにより、過酸化カルシウム
、過酸化カリウム等の過酸化物の粉末または顆粒５によ
り底層水中や汚泥層ｌに酸素を供給でき、さらに汚泥層
ｌからの栄養塩類物質や有機物質の溶出を抑制できると
共に、これら過酸化カルシウム、過酸化カリウム等の過
酸化物の粉末または顆粒５の撒布時の水中汚濁や水中ｐ
Ｈ値の象、激な上昇が生じない。Inside such a rod-shaped water-soluble member 2, Fig. 5-B,
As shown in Fig. 5-C, Fig. 5-D and Fig. 5E, by filling powder or granules 5 of peroxide such as calcium peroxide, potassium peroxide, calcium peroxide, potassium peroxide, etc. Oxygen can be supplied to the bottom water and sludge layer 1 by powder or granules 5 of peroxides such as calcium peroxide and potassium peroxide. When distributing peroxide powder or granules such as
The H value does not rise sharply.
次に、上記棒状の水溶性部材２を、第１図のごとく覆砂
支持材として使用する際は、先ず、水質及び底質の浄化
及び改善や漁場造成等のために覆砂しようとする水域に
おいて、船上環から所定の装置を用いて水面上にばら撒
きするようにしているが、狭い範囲内の水域に対しては
手で撒いても良い。Next, when using the rod-shaped water-soluble member 2 as a sand-covering support material as shown in FIG. In the above, the particles are sprinkled on the water surface using a predetermined device from the ship's hoop, but it is also possible to scatter the particles by hand in a small area of water.
ばら撒きされたこの水溶性部材２は水中を落下し、堆積
した軟弱な汚泥層ｌの表層上に乱雑に第２図のごとく組
み合い、重なり合った状態で沈着底するが、この状態に
ある程度の粗密があってもかまわない。なお、この実施
例１ではこの水溶性部材２の被覆厚さを汚泥層１の厚さ
や覆砂する砂材３の厚さや利用目的に応じて２からｌｏ
ｃｍ程度にすることが望ましいことが確認されている。The scattered water-soluble materials 2 fall through the water and are assembled randomly on the surface layer of the soft sludge layer l as shown in Figure 2, and are deposited on the bottom in an overlapping state. It doesn't matter if there is. In this Example 1, the coating thickness of the water-soluble member 2 is varied from 2 to 1000 depending on the thickness of the sludge layer 1, the thickness of the sand material 3 to be covered with sand, and the purpose of use.
It has been confirmed that it is desirable to set the distance to about cm.
上記のごとく汚泥層ｌ上に分布沈着底した水溶性部材２
上に砂材３を覆砂すると、この水溶性部材２が支持材の
役目をして砂材３が汚泥層１内に埋没することがなく、
また下の汚泥層１と逆転する現象が防止でき、計画通り
の覆砂層を簡単に、かつ効率良く達成することができる
。Water-soluble material 2 distributed and deposited on the sludge layer 1 as described above
When the sand material 3 is covered with sand on top, the water-soluble material 2 acts as a supporting material and the sand material 3 is not buried in the sludge layer 1.
Moreover, the phenomenon of reversal with the sludge layer 1 below can be prevented, and the sand covering layer as planned can be easily and efficiently achieved.
このように、覆砂時に砂材３を所定の厚さで一様に堆積
された汚泥層１の表層上に載荷できるので、その後時間
の経過と共に徐々に全体的、かつ−様に覆砂層及びこの
水溶性部材２の撒布層下の汚泥層ｌは沈下し、この汚泥
層ｌの性状や覆砂層厚にもよるが、一定の期間内、例え
ば１〜２ケ月間程度で沈下もほぼ収まり、従来工法より
短期間内で安定化させることができる。In this way, the sand material 3 can be loaded onto the surface layer of the sludge layer 1 that has been deposited uniformly to a predetermined thickness during sand covering, so that the sand covering layer and The sludge layer l below the spreading layer of the water-soluble member 2 sinks, and although it depends on the properties of this sludge layer l and the thickness of the sand covering layer, the sinking almost subsides within a certain period of time, for example, about 1 to 2 months. Stabilization can be achieved in a shorter period of time than with conventional methods.
以上のごと（、丁度汚泥層ｌの圧密沈下が終了し、水溶
性部材２の覆砂支持材としての役割が終了する頃、この
水溶性部材２が溶解するようにしておけば良いわけであ
るが、ここで前記のごとく、この水溶性部材２内に過酸
化カルシウム、過酸化カリウム等の過酸化物の粉末また
は顆粒５を充填しておけば、過酸化カルシウム、過酸化
カリウム等の過酸化物の粉末または顆粒５が溶けはじめ
、汚泥層ｌの表層を覆うことになり、汚泥層ｌと化学反
応を起し、汚泥層１中に酸素を供給すると共に、ｌη泥
層ｌ中からの情、窒素のような栄養塩類物質や有機物質
などの溶出を抑え、底質のみならず、覆砂層上の底層水
の水質の改善材または浄化材としての役割を果すことに
なる。As described above (just as the consolidation settling of the sludge layer 1 is completed and the role of the water-soluble member 2 as a sand-covering support material is completed), the water-soluble member 2 should be dissolved. However, as mentioned above, if powder or granules 5 of peroxide such as calcium peroxide and potassium peroxide are filled in the water-soluble member 2, peroxide such as calcium peroxide and potassium peroxide can be The powder or granules 5 of the substance begin to melt and cover the surface layer of the sludge layer 1, causing a chemical reaction with the sludge layer 1, supplying oxygen to the sludge layer 1, and removing information from the sludge layer 1. It suppresses the elution of nutrient substances such as nitrogen and organic substances, and plays a role as a water quality improving or purifying material not only for the bottom sediment but also for the bottom layer water above the sand cover layer.
次に、第３図の実施例２は、水底の軟弱な汚泥層ｌの上
に、第５−Ｆ図のごとき円筒形または第５−０図のごと
き球形の前記と同様な水溶性部材２内に過酸化カルシウ
ム、過酸化カリウム等の過酸化物の粉末または顆粒５を
充填したものを、第４図の平面図のごとく撒布すること
により、その水域の底質ひいては水質の浄化及び改善を
行なう方法を示している。Next, in Embodiment 2 of FIG. 3, a water-soluble member 2 similar to the above, which is cylindrical as shown in FIG. 5-F or spherical as shown in FIG. By distributing peroxide powder or granules 5 such as calcium peroxide, potassium peroxide, etc. as shown in the plan view in Figure 4, the sediment and water quality of the water area can be purified and improved. It shows you how to do it.
なお、上記水溶性部材２の形状としては、第５−Ｂ図の
円柱、第５−Ｃ図の三角柱、第５−り図の四角柱、第５
−Ｅ図の六角柱の棒状のものや、第５−Ｆ図の円筒状ま
たは第５Ｑ図の球状のもの等その用途等に応じて適宜に
選定するものとする。The shape of the water-soluble member 2 is a cylinder as shown in Figure 5-B, a triangular prism as shown in Figure 5-C, a square prism as shown in Figure 5-C, and a square prism as shown in Figure 5-C.
The hexagonal rod shape shown in Figure 5-E, the cylindrical shape shown in Figure 5-F, or the spherical shape shown in Figure 5Q shall be selected as appropriate depending on the intended use.
以上に説明したごとく、本発明の水質及び底質の改善方
法では、軟弱な水底の汚泥層を覆砂する際に、その砂材
が汚泥層中に埋没したり、または砂材が下の汚泥層と逆
転することがなく、覆砂の支持力もますことになり、覆
砂用の砂材の使用量が節減されるので施工費を低減し、
しかもその作業能率の向上をはかりうるという効果があ
る。As explained above, in the method for improving water quality and bottom sediment of the present invention, when covering a sludge layer on a soft water bottom with sand, the sand material may be buried in the sludge layer, or the sand material may be buried in the sludge underneath. There is no reversal of the layer, the supporting capacity of the sand cap is increased, and the amount of sand material used for the sand cap is reduced, reducing construction costs.
Moreover, it has the effect of improving work efficiency.
また、汚泥層に過酸化物を撒布する際に水中懸濁の発生
や水中ｐＨ値の急激な上昇を防止でき、その結果、懸濁
水の周辺水域への拡散等による魚貝類や藻類等への悪影
響の問題を生じないという効果がある。In addition, when peroxide is applied to the sludge layer, it is possible to prevent the occurrence of suspension in water and a sudden rise in the pH value of water, and as a result, it is possible to prevent the spread of suspended water into surrounding waters, which can cause damage to fish, shellfish, algae, etc. This has the effect of not causing any adverse effects.
また、所定時間後に溶解する水溶性部材は、例えばカー
ボン・メチル・セルローズ等のごとく非常に安価なもの
であり、従来の工法に比較しても非常に簡便で、低コス
トでしかも安全に底質改良工事が行なえるという利点が
ある。In addition, water-soluble materials that dissolve after a predetermined time are extremely cheap, such as carbon, methyl, and cellulose, and compared to conventional methods, they are extremely simple, low-cost, and safe to remove sediment from the bottom. It has the advantage of being able to carry out improvement work.
また、過酸化カルシウム、過酸化カリウム等の過酸化物
の粉末や顆粒を充填した水溶性部材は時間の経過に伴っ
て溶解し、内部の過酸化カルシウム、過酸化カリウム等
の過酸化物の粉末や顆粒が汚泥層の表層上で徐々に溶出
し、底層水中や汚泥表層中に酸素を供給してゆくので、
従来のごとく、最初から過酸化カルシウム、過酸化カリ
ウム等の過酸化物の粉末や顆粒を１ＩＪ１ｎした状態で
汚泥層に撒布した場合に比べ、その水質及び底質改善効
果はより持続性のあるものとなるという利点がある。In addition, water-soluble materials filled with powder or granules of peroxides such as calcium peroxide and potassium peroxide will dissolve over time, and the powder of peroxides such as calcium peroxide and potassium peroxide inside will dissolve over time. granules gradually elute on the surface layer of the sludge layer, supplying oxygen to the bottom water and the surface layer of the sludge.
Compared to the conventional method, in which peroxide powder or granules such as calcium peroxide or potassium peroxide are applied to the sludge layer from the beginning, the water quality and sediment improvement effects are more sustainable. There is an advantage that
第１図は本発明の水質及び底質の改善方法を適用した実
施例１の水底の汚泥層に覆砂した状態を示す側断面図、
第２図は第１図の水溶性部材の平面図、第３図は実施例
２の水底の汚泥層の改良中の状態を示す側断面図、第４
図は第３図の水溶性部材の平面図、第５−Ａ図から第５
−０図までは本発明の方法に適用されるそれぞれ異なる
形状の水溶性部材の斜視図である。
ｌ・・・汚泥層、２・・・水溶性部材、３・・・砂材、
５・・・過酸化物。FIG. 1 is a side sectional view showing a state in which a sludge layer on the water bottom is covered with sand in Example 1 to which the method for improving water quality and bottom sediment of the present invention is applied;
FIG. 2 is a plan view of the water-soluble member shown in FIG.
The figure is a plan view of the water-soluble member in Figure 3, and Figures 5-A to 5.
Figures up to Figure -0 are perspective views of water-soluble members of different shapes that are applied to the method of the present invention. l...Sludge layer, 2...Water-soluble member, 3...Sand material,
5... Peroxide.
Claims (1)
ウム、過酸化カリウム等の過酸化物を充填して水底に撒
布する水質及び底質の改善方法。 ２、所定時間後に溶解する棒状の水溶性部材内に過酸化
カルシウム、過酸化カリウム等の過酸化物を充填して水
底に撒布の後、その上に覆砂を行なう水質及び底質の改
善方法。[Scope of Claims] 1. A method for improving water quality and bottom sediment, in which peroxides such as calcium peroxide and potassium peroxide are filled in a water-soluble material that dissolves after a predetermined period of time, and then sprinkled on the bottom of the water. 2. A method for improving water quality and bottom sediment, in which peroxides such as calcium peroxide and potassium peroxide are filled in a rod-shaped water-soluble member that dissolves after a predetermined period of time, and then sprinkled on the bottom of the water, and then covered with sand. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20933788A JPH0259095A (en) | 1988-08-25 | 1988-08-25 | Method for improving water quality and deposit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20933788A JPH0259095A (en) | 1988-08-25 | 1988-08-25 | Method for improving water quality and deposit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0259095A true JPH0259095A (en) | 1990-02-28 |
| JPH0336596B2 JPH0336596B2 (en) | 1991-05-31 |
Family
ID=16571279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20933788A Granted JPH0259095A (en) | 1988-08-25 | 1988-08-25 | Method for improving water quality and deposit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0259095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5202044A (en) * | 1990-09-12 | 1993-04-13 | Kao Corporation | Working fluid composition for refrigerating machine |
| CN102964040A (en) * | 2012-11-30 | 2013-03-13 | 南京大学 | In-situ repair method for polluted sediment nitrogen nutritive salt and in-situ repairing pile applied to in-situ repair method |
-
1988
- 1988-08-25 JP JP20933788A patent/JPH0259095A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5202044A (en) * | 1990-09-12 | 1993-04-13 | Kao Corporation | Working fluid composition for refrigerating machine |
| CN102964040A (en) * | 2012-11-30 | 2013-03-13 | 南京大学 | In-situ repair method for polluted sediment nitrogen nutritive salt and in-situ repairing pile applied to in-situ repair method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0336596B2 (en) | 1991-05-31 |
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