JPH0699161A - Method for clarifying polluted soil - Google Patents
Method for clarifying polluted soilInfo
- Publication number
- JPH0699161A JPH0699161A JP4277778A JP27777892A JPH0699161A JP H0699161 A JPH0699161 A JP H0699161A JP 4277778 A JP4277778 A JP 4277778A JP 27777892 A JP27777892 A JP 27777892A JP H0699161 A JPH0699161 A JP H0699161A
- Authority
- JP
- Japan
- Prior art keywords
- well
- coal ash
- pumping
- pollutants
- pumping well
- 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
- Processing Of Solid Wastes (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Fire-Extinguishing Compositions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は油分や重金属（水銀、
鉛、カドニユウム、クロム、銅等）等で汚染された土壌
の浄化技術に関する。The present invention relates to oil and heavy metals (mercury,
It relates to the purification technology of soil contaminated with lead, cadmium, chromium, copper, etc.).
【０００２】[0002]
【従来の技術】油分で汚染された土壌の浄化方法として
は、汚染土壌を良質の土壌に置換する方法や薬液等
を用いて中和若しくは分解する方法が考えられる。2. Description of the Related Art As a method for purifying oil-contaminated soil, a method of replacing the contaminated soil with high-quality soil or a method of neutralizing or decomposing it with a chemical solution or the like can be considered.
【０００３】[0003]
【発明が解決しようとする問題点】前記した従来の土壌
の浄化技術にあつては次のような問題点がある。[Problems to be Solved by the Invention] The conventional soil purification techniques described above have the following problems.
【０００４】＜イ＞ 置換工法の場合、工事が大規模と
なるから工費及び工期の両面での負担が大きい。また汚
染範囲が広範な現場には不向きである。<A> In the replacement construction method, since the construction work is large-scale, the burden on both the construction cost and the construction period is large. In addition, it is not suitable for sites with a wide range of pollution.
【０００５】＜ロ＞ 薬液等を用いて中和若しくは分解
する方法にあっては、浄化コストが高い割りには浄化程
度が低く、また薬液や分解された汚染物が地中に残存す
るため地下水の二次汚染の不安が残る。<B> In the method of neutralizing or decomposing using a chemical solution, the purification cost is high, but the degree of purification is low, and the chemical solution and decomposed contaminants remain in the ground. There remains anxiety about secondary pollution.
【０００６】[0006]
【本発明の目的】本発明は以上の点に鑑みて成されたも
ので、その目的とするところは、地中の汚染物質を効率
良く除去でき、併せて地下水の浄化も図れる、汚染土壌
の浄化技術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 efficiently remove underground pollutants and to purify groundwater. To provide purification technology.
【０００７】[0007]
【問題点を解決するための手段】本発明は、汚染物質を
含む汚染土壌に粉末の石炭灰を撹拌混合して汚染物質を
石炭灰に吸着させた改良体を構築し、改良体の近傍に設
けた揚水井戸の周囲を粒状の石炭灰で層状に覆い、揚水
により地中の汚染物質を改良体及び揚水井戸の周囲の石
炭灰に吸着させて除去することを特徴とする、汚染土壌
の浄化方法である。[Means for Solving the Problems] The present invention constructs an improved body in which powdered coal ash is admixed in a contaminated soil containing a pollutant by stirring to adsorb the pollutant to the coal ash, and in the vicinity of the improved body. Purification of contaminated soil, which is characterized by covering the surroundings of the established pumping well with a layer of granular coal ash and adsorbing and removing the pollutants in the ground by the pumping and the coal ash around the pumping well. Is the way.
【０００８】さらに本発明は、汚染物質を含む汚染土壌
に粉末の石炭灰を撹拌混合して汚染物質を石炭灰に吸着
させた改良体を構築し、改良体の近傍に設けた揚水井戸
の周囲を粒状石炭灰で層状に覆い、前記揚水井戸と水頭
差を有する揚水還流用の放水井戸を設け、揚水により地
中の汚染物質を改良体及び揚水井戸の周囲の石炭灰に吸
着させて除去することを特徴とする、汚染土壌の浄化方
法である。Further, the present invention constructs an improved body in which powdered coal ash is admixed with polluted soil containing pollutants by adsorbing the pollutants to the coal ash, and the surrounding of a pumping well provided near the improved body. Is layered with granular coal ash, and a discharge well for pumping recirculation that has a head difference with the above-mentioned pumping well is provided, and the pollutants in the ground are adsorbed by the coal ash around the improvement body and the pumping well by pumping and removed. It is a method for purifying contaminated soil, which is characterized in that
【０００９】さらに本発明は、汚染物質を含む汚染土壌
に粉末の石炭灰を撹拌混合して汚染物質を石炭灰に吸着
させた改良体を構築し、改良体の近傍に設けた揚水井戸
の周囲を粒状石炭灰で層状に覆い、前記揚水井戸と水頭
差を有する揚水還流用の放水井戸を設け、揚水井戸から
の揚水を放水井戸へ還流する還流路の途上に粉末の石炭
灰製のフィルタを内蔵したタンクを介在し、汚染物質を
前記フィルタで除去した後の揚水を放水井戸に還流する
ことを特徴とする、汚染土壌の浄化方法である。Further, the present invention constructs an improved body in which powdered coal ash is admixed with a polluted soil containing pollutants by adsorbing the pollutants to the coal ash, and the surroundings of a pumping well provided near the improved body. A layer of granular coal ash is coated, a discharge well for pumping water circulation having a head difference with the pumping well is provided, and a filter made of powdered coal ash is provided on the way of the reflux path for pumping water from the pumping well to the discharge well. A method for purifying contaminated soil, characterized in that the pumped water after removing contaminants by the filter is returned to a discharge well via an internal tank.
【００１０】さらに本発明は、汚染土壌に設けた揚水井
戸の周囲を粒状石炭灰で層状に覆い、前記揚水井戸と水
頭差を有する揚水還流用の放水井戸を設け、前記放水井
戸に汚染物質の分離剤を投入し、放水井戸の分離剤を地
中に浸透させて揚水井戸で回収し、分離した地中の汚染
物質を揚水井戸の周囲の石炭灰で吸着して除去すること
を特徴とする、汚染土壌の浄化方法である。Further, according to the present invention, the periphery of the pumping well provided in the contaminated soil is covered with a layer of granular coal ash in a layered manner, and a discharge well for pumping circulation having a head difference from the pumping well is provided, and the discharge well is provided with a pollutant. It is characterized by injecting a separating agent, infiltrating the separating agent of the discharge well into the ground and collecting it in the pumping well, and adsorbing and separating the separated underground pollutants with the coal ash around the pumping well. , A method of cleaning contaminated soil.
【００１１】[0011]
【実施例１】以下図面を参照しながら本発明の実施例に
ついて説明する。Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.
【００１２】＜イ＞改良体の形成 図１に示すように適宜の間隔を隔てて汚染土壌１と粉末
石炭灰とを撹拌混合して複数の柱状改良体２を造成す
る。柱状改良体２の造成には例えば撹拌羽根の下部から
粉末石炭灰を吐出して撹拌できる、ＤＪＭ工法（粉体噴
射撹拌工法）等を採用できる。粉末石炭灰の吐出量は予
め調査した汚染物質（例えば油分）の含有量に応じて決
定する。汚染土壌１と粉末石炭灰とを撹拌混合すること
で、粉末石炭灰が汚染土壌１中の油分を吸着して凝結す
る。<A> Formation of Improvements As shown in FIG. 1, the contaminated soil 1 and the powdered coal ash are stirred and mixed at appropriate intervals to form a plurality of columnar improvement bodies 2. For example, the DJM method (powder injection stirring method), which can stir powder coal ash from the lower part of the stirring blade, can be used to create the columnar improved body 2. The discharge amount of the powdered coal ash is determined according to the content of the pollutant (for example, oil content) investigated in advance. By stirring and mixing the contaminated soil 1 and the powdered coal ash, the powdered coal ash adsorbs and condenses the oil component in the contaminated soil 1.
【００１３】＜ロ＞揚水井戸の形成 図２、３に示すように各柱状改良体２の間の汚染土壌１
を掘削して透水性の揚水井戸３を設置すると共に、この
揚水井戸３の外周全域に亘りに造粒石炭灰層４を形成す
る。すなわち、汚染土壌１に揚水井戸３より大径のケー
シング（図示せず）を圧入した後、ケーシング内を削孔
し、そしてケーシング内に揚水井戸３を建て込み、揚水
井戸３とケーシングの周面間に造粒石炭灰を充填し、最
後にケーシングを抜き取れば、造粒石炭灰層４を外装し
た揚水井戸３を形成できる。尚、揚水井戸３としては目
詰まりし難い有孔パイプ等を使用できる。<B> Formation of pumping well As shown in FIGS. 2 and 3, the contaminated soil 1 between the columnar improvement bodies 2 is formed.
Is drilled to install a water-permeable pumping well 3, and a granulated coal ash layer 4 is formed over the entire outer circumference of the pumping well 3. That is, after a casing (not shown) having a diameter larger than that of the pumping well 3 is press-fitted into the contaminated soil 1, the inside of the casing is drilled, and the pumping well 3 is built in the casing, and the pumping well 3 and the peripheral surface of the casing. If the granulated coal ash is filled in the space and the casing is finally removed, the pumping well 3 having the granulated coal ash layer 4 as an exterior can be formed. As the pumping well 3, a perforated pipe or the like that is unlikely to be clogged can be used.
【００１４】＜ハ＞揚水 つぎに揚水井戸３内に水中ポンプ５をセットし、断続的
に地下水を揚水する。揚水により地下水が柱状造成体２
や造粒石炭灰層４を透過して揚水井戸３へ移動する。地
下水の移動に伴い、柱状造成体２や造粒石炭灰層４を構
成する石炭灰が、油分を吸着して土中や地下水中に含ま
れていた油分を除去する。<C> Pumping Next, the submersible pump 5 is set in the pumping well 3 to intermittently pump groundwater. Groundwater columnar formation 2 by pumping
And the granulated coal ash layer 4 to move to the pumping well 3. Along with the movement of the groundwater, the coal ash forming the columnar structure 2 and the granulated coal ash layer 4 adsorbs the oil and removes the oil contained in the soil or the groundwater.
【００１５】[0015]
【実施例２】図４は前記実施例１を基礎とし、汚染地盤
１に透水性の放水井戸６を設け、揚水井戸３の水中亜ポ
ンプ５で汲み上げた地下水を放水井戸６へ還流させる他
の実施例を示す。本実施例は放水井戸６の水位を揚水井
戸３より高くし、水頭差を利用して地下水を強制的に柱
状改良体２及び造粒石炭灰層４を透過させることで、汚
染土壌１中の油分を柱状改良体２及び造粒石炭灰層４に
吸着させる。本実施例にあっては、地下水を強制的に揚
水井戸３へ集水するので、実施例１と比較して汚染土壌
１や地下水の浄化率が増すうえに、水頭差を利用してい
るので地下水をよりスムーズに移動できる利点がある。
さらに油分を周辺地盤に拡散するのを効果的に防止でき
ると共に、柱状改良体２自体の含有油分を低下できる利
点がある。[Second Embodiment] FIG. 4 is based on the first embodiment, in which a permeable water discharge well 6 is provided in the contaminated ground 1, and groundwater pumped by an underwater sub-pump 5 of the pumping well 3 is returned to the water discharge well 6. An example is shown. In this embodiment, the water level of the discharge well 6 is made higher than that of the pumping well 3, and groundwater is forcedly permeated through the columnar improvement body 2 and the granulated coal ash layer 4 by utilizing the water head difference. Oil is adsorbed to the columnar improver 2 and the granulated coal ash layer 4. In this embodiment, since groundwater is forcibly collected in the pumping well 3, the purification rate of the contaminated soil 1 and groundwater is increased as compared with the first embodiment, and the head difference is used. There is an advantage that groundwater can be moved more smoothly.
Further, there is an advantage that the oil content can be effectively prevented from diffusing to the surrounding ground and the oil content contained in the columnar body 2 itself can be reduced.
【００１６】[0016]
【実施例３】図５は前記実施例２を基に、揚水井戸３で
揚水した油分を含む地下水を放水井戸６へ還流する還流
路７の途上にノッチタンク８を介在して浄化する他の実
施例を示す。ノッチタンク８は図６に拡大して示すよう
に、タンク８１内に造粒石炭灰を収容したフィルタ９を
格納して構成している。本実施例はノッチタンク８内か
ら地下水のサンプルを定期的に採取して油分の含有量を
計測しながら、地下水の油分含有量が基準含有量（１ｐ
ｐｍ）以下になるまでフィルタ８１によって油分を吸着
する。地下水の油分含有量が基準含有量以下になった
ら、ノッチタンク８から放水井戸へ６へ地下水を還流す
る。尚、図５中符号７１は還流路７の途上に設けた流量
計である。本実施例にあっては上記実施例２の利点に加
えて、地下水の浄化効率がよくなる。[Third Embodiment] FIG. 5 is based on the second embodiment, and in which another notch tank 8 is provided in the middle of a return passage 7 for returning groundwater containing oil, which has been pumped up in the pumping well 3, to the discharge well 6 for purification. An example is shown. As shown in an enlarged view in FIG. 6, the notch tank 8 has a tank 81 in which a filter 9 containing granulated coal ash is stored. In this embodiment, the ground water sample is periodically taken from the notch tank 8 to measure the oil content, and the ground water oil content is the standard content (1 p
Oil is adsorbed by the filter 81 until it becomes pm) or less. When the oil content of the groundwater becomes equal to or lower than the standard content, the groundwater is returned from the notch tank 8 to the discharge well 6. Reference numeral 71 in FIG. 5 is a flow meter provided on the way of the return path 7. In this embodiment, in addition to the advantages of the second embodiment, the efficiency of purifying groundwater is improved.
【００１７】[0017]
【実施例４】図７は放水井戸６内に満たした分離剤１０
を汚染土壌１を透過させて浄化する他の実施例を示す。
汚染物質が油分の場合の分離剤１０としては、界面活性
剤を主成分とするラウリン酸等を使用できる。本実施例
は分離剤１０を汚染土壌１に透過させる際に土中から油
分を分離して揚水井戸３の周囲の造粒石炭灰層４に吸着
させて浄化する。揚水井戸３で揚水した地下水は、再度
ノッチタンク８で油分を吸着して浄化した後、放水井戸
６へ還流する。分離剤９は適宜放水井戸６へ補給する。
尚、還流路７の途上に分離剤回収容のフィルタ（図示せ
ず）を追加して介在しておけば、揚水中から分離剤１０
を回収することも可能である。Fourth Embodiment FIG. 7 shows a separating agent 10 filled in the discharge well 6.
Another example in which the contaminated soil 1 is permeated and purified is shown.
As the separating agent 10 when the contaminant is oil, lauric acid containing a surfactant as a main component can be used. In this embodiment, when the separating agent 10 is permeated into the contaminated soil 1, oil is separated from the soil and adsorbed to the granulated coal ash layer 4 around the pumping well 3 for purification. The groundwater pumped up in the pumping well 3 is again adsorbed with oil in the notch tank 8 to be purified, and then returned to the discharge well 6. The separating agent 9 is appropriately supplied to the discharge well 6.
In addition, if a filter (not shown) for accommodating the separating agent is additionally provided on the way of the reflux passage 7, the separating agent 10 is removed from the pumped water.
It is also possible to collect.
【００１８】[0018]
【発明の効果】本発明は以上説明したようになるから次
のような効果を得ることができる。Since the present invention is as described above, the following effects can be obtained.
【００１９】＜イ＞ 土中に存在する汚染物質を石炭灰
が吸着して取り除くため、土壌の浄化が図れる。<A> Since the coal ash adsorbs and removes pollutants existing in the soil, the soil can be purified.
【００２０】＜ロ＞ 石炭灰に吸着された汚染物質は固
体化されるため、地中に残存させても周辺地盤を再汚染
する心配が極めて少ない。<B> Since the pollutants adsorbed on the coal ash are solidified, there is little fear of recontaminating the surrounding ground even if they remain in the ground.
【００２１】＜ハ＞ 集水井戸を設けて地下水を強制的
に移動することで、汚染物質の除去効率が向上する。<C> By providing a water collection well and forcibly moving groundwater, the efficiency of removing pollutants is improved.
【００２２】＜ニ＞ 追加して設けた放水井戸に集水井
戸からの揚水を放水して地下水を循環させて土壌を浄化
する場合には、両井戸の地下水の水頭差を利用すること
で地下水の浸透性が良好となる。<D> When the pumped water from the collection well is discharged to the additionally provided discharge well to circulate the groundwater to purify the soil, the difference in the groundwater heads between the two wells is used. Has good permeability.
【００２３】＜ホ＞ 集水井戸からの揚水を放水井戸へ
還流させる還流路の途上に、石炭灰製のフィルタを介在
させることで、汚染物質を除去して回収できると共に、
土壌と地下水の両方を浄化できる。<E> A pollutant can be removed and recovered by interposing a filter made of coal ash on the way of the return path for returning the pumped water from the collection well to the discharge well, and
Can purify both soil and groundwater.
【００２４】＜ヘ＞ 放水井戸内に投入した汚染物質の
分離剤を地中に浸透させて揚水井戸で回収することで、
地中の汚染物質を分解するだけでなく、分解した汚染物
質を石炭灰に吸着させて除去できる。そのため、極めて
高い浄化が図れる。<F> By infiltrating the separating agent for the pollutants introduced into the discharge well into the ground and collecting it in the pumping well,
Not only can the ground pollutants be decomposed, but the decomposed pollutants can also be adsorbed and removed by coal ash. Therefore, extremely high purification can be achieved.
【図１】 実施例１に係る柱状改良体の形成工程の説明
図FIG. 1 is an explanatory diagram of a process of forming a columnar improved body according to a first embodiment.
【図２】 汚染土壌の浄化時の説明図[Fig. 2] Illustration for cleaning contaminated soil
【図３】 その平面図FIG. 3 is a plan view thereof
【図４】 放水井戸を設けた実施例２の説明図FIG. 4 is an explanatory diagram of Example 2 provided with a water discharge well.
【図５】 ノッチタンクを使用する実施例３の説明図FIG. 5 is an explanatory diagram of a third embodiment using a notch tank.
【図６】 実施例３のノッチタンクの説明図FIG. 6 is an explanatory diagram of a notch tank according to a third embodiment.
【図７】 分離剤を用いた実施例４の説明図FIG. 7 is an explanatory diagram of Example 4 using a separating agent.
Claims (4)
灰を撹拌混合して汚染物質を石炭灰に吸着させた改良体
を構築し、 改良体の近傍に設けた揚水井戸の周囲を粒状の石炭灰で
層状に覆い、 揚水により地中の汚染物質を改良体及び揚水井戸の周囲
の石炭灰に吸着させて除去することを特徴とする、 汚染土壌の浄化方法。1. A contaminated soil containing pollutants is stirred and mixed with powdered coal ash to construct an improved body in which the pollutants are adsorbed to the coal ash, and the surroundings of a pumping well provided near the improved body are granular. A method for purifying contaminated soil, characterized in that it is covered with coal ash in a layered manner, and that underground pollutants are adsorbed and removed by the coal ash around the improvement body and the pumping well by pumping.
灰を撹拌混合して汚染物質を石炭灰に吸着させた改良体
を構築し、 改良体の近傍に設けた揚水井戸の周囲を粒状石炭灰で層
状に覆い、 前記揚水井戸と水頭差を有する揚水還流用の放水井戸を
設け、 揚水により地中の汚染物質を改良体及び揚水井戸の周囲
の石炭灰に吸着させて除去することを特徴とする、 汚染土壌の浄化方法。2. An improved body in which powdered coal ash is admixed in a contaminated soil containing a pollutant by stirring to adsorb the pollutant to the coal ash, and granular coal is provided around a pumping well provided near the improved body. It is characterized by covering with ash in a layered manner and providing a discharge well for pumping recirculation with a head difference from the above-mentioned pumping well to remove pollutants in the ground by adsorbing to the improved body and coal ash around the pumping well by pumping. A method for cleaning contaminated soil.
灰を撹拌混合して汚染物質を石炭灰に吸着させた改良体
を構築し、 改良体の近傍に設けた揚水井戸の周囲を粒状石炭灰で層
状に覆い、 前記揚水井戸と水頭差を有する揚水還流用の放水井戸を
設け、 揚水井戸からの揚水を放水井戸へ還流する還流路の途上
に粉末の石炭灰製のフィルタを内蔵したタンクを介在
し、 汚染物質を前記フィルタで除去した後の揚水を放水井戸
に還流することを特徴とする、 汚染土壌の浄化方法。3. An improved body in which powdered coal ash is admixed in a contaminated soil containing a pollutant by stirring to adsorb the pollutant to the coal ash, and granular coal is provided around a pumping well provided in the vicinity of the improved body. A layer of ash covered with a filter for powder coal ash on the way of the reflux path for pumping water from the pumping well to the pumping well, which has a head difference with the pumping well. The method for purifying contaminated soil is characterized in that the pumped water after the pollutants are removed by the filter is returned to the discharge well through the above.
状石炭灰で層状に覆い、 前記揚水井戸と水頭差を有する揚水還流用の放水井戸を
設け、 前記放水井戸に汚染物質の分離剤を投入し、 放水井戸の分離剤を地中に浸透させて揚水井戸で回収
し、 分離した地中の汚染物質を揚水井戸の周囲の石炭灰で吸
着して除去することを特徴とする、 汚染土壌の浄化方法。4. A pumping well provided in the contaminated soil is surrounded by a layer of granular coal ash in a layered manner, and a discharge well for pumping recirculation having a head difference from the pumping well is provided, and a separating agent for pollutants is provided in the discharge well. The polluted soil is characterized in that it is input, the separating agent of the discharge well is infiltrated into the ground and collected in the pumping well, and the separated pollutant in the ground is adsorbed and removed by the coal ash around the pumping well. Purification method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27777892A JP3298019B2 (en) | 1992-09-24 | 1992-09-24 | How to clean contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27777892A JP3298019B2 (en) | 1992-09-24 | 1992-09-24 | How to clean contaminated soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0699161A true JPH0699161A (en) | 1994-04-12 |
| JP3298019B2 JP3298019B2 (en) | 2002-07-02 |
Family
ID=17588187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27777892A Expired - Fee Related JP3298019B2 (en) | 1992-09-24 | 1992-09-24 | How to clean contaminated soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3298019B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996036434A1 (en) * | 1995-05-19 | 1996-11-21 | Terrils | Coal ashes used for treating various media and facilities for using same |
| FR2734174A1 (en) * | 1995-05-19 | 1996-11-22 | Raymond Gleizes | Coal combustion ash of fly-ash particle size |
| JP2012086222A (en) * | 2012-01-06 | 2012-05-10 | Kumagai Gumi Co Ltd | Method for cleaning underground oil-contaminated soil |
| CN103241900A (en) * | 2013-05-20 | 2013-08-14 | 宁夏祥河生态环境工程研究院有限公司 | Treatment system for percolating and filtering rural domestic sewage by excavating land in minimally invasive mode |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101017090B1 (en) | 2008-04-16 | 2011-02-25 | 금호기술검사(주) | Method and device for recovering oil-polluted soil |
-
1992
- 1992-09-24 JP JP27777892A patent/JP3298019B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996036434A1 (en) * | 1995-05-19 | 1996-11-21 | Terrils | Coal ashes used for treating various media and facilities for using same |
| FR2734175A1 (en) * | 1995-05-19 | 1996-11-22 | Raymond Gleizes | ASHES OF CHARBONNIERE ORIGIN APPLIED TO THE TREATMENT OF VARIOUS MEDIA AND INSTALLATIONS FOR IMPLEMENTATION |
| FR2734174A1 (en) * | 1995-05-19 | 1996-11-22 | Raymond Gleizes | Coal combustion ash of fly-ash particle size |
| US6015498A (en) * | 1995-05-19 | 2000-01-18 | Raymond M. Gleizes | Coal ashes used for treating various media and facilities for using same |
| JP2012086222A (en) * | 2012-01-06 | 2012-05-10 | Kumagai Gumi Co Ltd | Method for cleaning underground oil-contaminated soil |
| CN103241900A (en) * | 2013-05-20 | 2013-08-14 | 宁夏祥河生态环境工程研究院有限公司 | Treatment system for percolating and filtering rural domestic sewage by excavating land in minimally invasive mode |
| CN103241900B (en) * | 2013-05-20 | 2014-06-18 | 宁夏祥河生态环境工程研究院有限公司 | Treatment system for percolating and filtering rural domestic sewage by excavating land in minimally invasive mode |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3298019B2 (en) | 2002-07-02 |
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