JPH0523692A - Treatment and device for organochlorine compound - Google Patents
Treatment and device for organochlorine compoundInfo
- Publication number
- JPH0523692A JPH0523692A JP3203593A JP20359391A JPH0523692A JP H0523692 A JPH0523692 A JP H0523692A JP 3203593 A JP3203593 A JP 3203593A JP 20359391 A JP20359391 A JP 20359391A JP H0523692 A JPH0523692 A JP H0523692A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- groundwater
- contaminated
- air
- methane
- 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
- 150000004045 organic chlorine compounds Chemical class 0.000 title claims abstract description 25
- 238000011282 treatment Methods 0.000 title abstract description 11
- 239000002689 soil Substances 0.000 claims abstract description 43
- 239000003673 groundwater Substances 0.000 claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 abstract description 9
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- 241000894006 Bacteria Species 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- CUPCBVUMRUSXIU-UHFFFAOYSA-N [Fe].OOO Chemical compound [Fe].OOO CUPCBVUMRUSXIU-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- -1 iron ions Chemical class 0.000 description 1
- 229910021519 iron(III) oxide-hydroxide Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、有機塩素化合物の処理
方法に係り、特にトリクロロエチレンのような有機塩素
化合物に汚染された土壌及び地下水を清浄化するための
有機塩素化合物の処理方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating organic chlorine compounds, and more particularly to a method and apparatus for treating organic chlorine compounds for cleaning soil and groundwater contaminated with organic chlorine compounds such as trichlorethylene. .
【０００２】[0002]
【従来の技術】トリクロロエチレンなどの有機塩素化合
物は、洗浄剤として半導体製造工場などで多用されてお
り、近年、地下水や土壌への汚染が深刻な社会問題にな
っている。これまでに行われてきた汚染土壌の修復技術
としては、（ａ）地下に蒸気を吹き込み、地表に排気さ
れる排ガスを、活性炭で吸着除去する方法、（ｂ）汚染
地域の土壌に、有機塩素化合物の分解能力を有する微生
物と、その菌の生育に必要な基質とを浸透させる方法、
（ｃ）汚染土壌を掘り出して、溶融処理等で汚染物を封
じ込める方法、などが行われてきた。2. Description of the Related Art Organic chlorine compounds such as trichlorethylene are frequently used as cleaning agents in semiconductor manufacturing plants and the like, and in recent years, pollution of groundwater and soil has become a serious social problem. The contaminated soil restoration techniques that have been used so far include (a) a method in which steam is blown underground and exhaust gas exhausted to the surface is adsorbed and removed by activated carbon, and (b) organic chlorine is added to soil in contaminated areas. A method of permeating a microorganism having a compound decomposing ability and a substrate necessary for the growth of the microorganism,
(C) A method of digging out contaminated soil and confining the contaminated material by melting treatment or the like has been performed.
【０００３】これらの方法は、大部分が大がかりな土木
作業を伴うものであり、経費の増大により普及は進んで
いなかった。また（ｂ）の生物学的な処理方法は、その
地域の土着微生物ではない菌株を使用するケースが多い
点、基質として酸素を供給する必要があり、地下への酸
素供給が容易ではない点、菌株によっては炭素源として
フェノールなどの有害な物質を使用する場合がある点、
などの問題点を有していた。一方、これまでに行われて
きた汚染地下水の処理方法は、エアストリッピング法、
活性炭吸着法、あるいは逆浸透膜法などであり、主とし
て物理化学的な方法であった。しかし、これらの方法
は、有機塩素化合物を分解して無害化する方法ではな
く、単に液相から気相へ、あるいは活性炭のような吸着
材（固相）へ移行させることで、水中から汚染物を除去
する方法に過ぎなかった。すなわち、安上がりで、かつ
有機塩素化合物を分解、無害化できるような、土壌や地
下水の修復技術が望まれていた。Most of these methods involve large-scale civil engineering work, and have not been popularized due to an increase in cost. In addition, the biological treatment method of (b) often uses a strain that is not an indigenous microorganism in the area, needs to supply oxygen as a substrate, and is not easy to supply oxygen underground. Depending on the strain, harmful substances such as phenol may be used as a carbon source,
Had problems such as. On the other hand, the contaminated groundwater treatment methods that have been performed so far are the air stripping method,
Activated carbon adsorption method, reverse osmosis membrane method, etc. were mainly physicochemical methods. However, these methods are not methods of decomposing organic chlorine compounds to make them harmless, but simply transferring from liquid phase to vapor phase or to adsorbent (solid phase) such as activated carbon to remove pollutants from water. Was just a way to remove. That is, there has been a demand for a soil or groundwater restoration technique that is inexpensive and that can decompose and detoxify organic chlorine compounds.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点を除き、土壌や地下水中の有機塩素化合物
を、土壌中に存在するメタン酸化細菌のような微生物の
酸化作用によって、無害な炭酸ガス、水、塩酸に分解す
る経済的な処理方法と装置を提供することを課題とす
る。DISCLOSURE OF THE INVENTION The present invention eliminates the above-mentioned problems of the prior art by harmlessly treating organic chlorine compounds in soil or groundwater by the oxidizing action of microorganisms such as methane-oxidizing bacteria present in soil. An object of the present invention is to provide an economical treatment method and apparatus that decomposes into various carbon dioxide gas, water and hydrochloric acid.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、有機塩素化合物によって汚染された土
壌及び地下水を処理する方法において、該汚染地域から
汲み上げた地下水を、空気溶解工程、ろ過工程及びメタ
ンと空気の混合ガスを溶解する工程に順次通した後に、
地下に戻す操作を繰り返すことにより土壌及び地下水を
清浄化することを特徴とする有機塩素化合物の処理方法
としたものである。また、本発明では、有機塩素化合物
によって汚染された土壌及び地下水を処理する装置にお
いて、該汚染地域から地下水を汲み上げる手段、汲み上
げた地下水を順次通す空気溶解装置、ろ過装置及びメタ
ンと空気の混合ガスを溶解する装置を有し、該各装置を
通った処理水を地下に戻す手段を有することによる土壌
及び地下水を清浄化するための有機塩素化合物の処理装
置としたものである。In order to solve the above problems, in the present invention, in a method of treating soil and groundwater contaminated with an organic chlorine compound, groundwater pumped from the contaminated area is subjected to an air dissolving step, After sequentially passing through the filtration step and the step of dissolving a mixed gas of methane and air,
The method for treating an organic chlorine compound is characterized by cleaning soil and groundwater by repeating the operation of returning to the underground. Further, in the present invention, in a device for treating soil and groundwater contaminated with an organic chlorine compound, means for pumping groundwater from the contaminated area, an air dissolving device for sequentially passing the pumped groundwater, a filtering device, and a mixed gas of methane and air. And an apparatus for dissolving treated water, and means for returning the treated water that has passed through the respective apparatuses to the underground, thereby treating the organic chlorine compound for cleaning soil and groundwater.
【０００６】次に、本発明を詳しく説明する。本発明
は、汚染土壌中でトリクロロエチレン等の有機塩素化合
物の分解能力を有するメタン酸化細菌を優占化し、メタ
ン酸化細菌の酸化作用で有機塩素化合物の分解処理を行
うものである。また、メタン細菌は好気性であることか
ら、その生育に酸素を必要とする。従来の方法では、地
下水へ酸素を供給する方法として、土壌に散気装置を埋
設する方法、あるいは汲み上げた地下水に酸素を溶解さ
せた後、地下に戻す方法が行われていたが、この方法で
は土壌の酸化還元電位が高くなり、地下水に溶解してい
た鉄イオン等が酸化されて含水酸化物として析出し、そ
の結果、土壌内の地下水の流れが変化したり、地下水が
赤色を呈する場合があった。Next, the present invention will be described in detail. In the present invention, methane-oxidizing bacteria having the ability to decompose organochlorine compounds such as trichlorethylene are dominated in contaminated soil, and the organochlorine compounds are decomposed by the oxidizing action of methane-oxidizing bacteria. Moreover, since methane bacteria are aerobic, they require oxygen for their growth. In the conventional method, as a method of supplying oxygen to groundwater, a method of burying an air diffuser in the soil or a method of dissolving oxygen in the pumped groundwater and then returning it to the underground has been used. The redox potential of the soil rises, iron ions etc. dissolved in groundwater are oxidized and precipitated as hydrous oxides, and as a result, the flow of groundwater in the soil may change or the groundwater may turn red. there were.
【０００７】本発明は、このような点を十分に考慮した
結果なされたもので、有機塩素化合物の分解と、鉄など
による障害の防止を両立させるものである。本発明の中
で、空気溶解工程およびろ過工程は、汲み上げた地下水
の鉄、あるいはマンガンを除去する工程である。本発明
に使用する混合ガスのメタン濃度は、メタン酸化細菌の
メタン／酸素要求量や、混合ガスの爆発性などを考慮し
て決定されるが、通常は５vol%以下の濃度が適切であ
る。またメタンガスの供給源として、付近の廃水処理装
置から発生する消化ガスを利用することもできる。また
本発明では、処理開始時期にメタン酸化細菌を含む土壌
や活性汚泥を、土壌中に植種するのが、処理機能の発現
を迅速にできるので有効である。植種源は、なるべく汚
染地域の近隣のものを使用するのが、その地域の土壌生
態系を乱さないので有効である。メタン酸化細菌は、水
田土壌や蓮池土壌、あるいは活性汚泥中に存在している
場合が多い。The present invention has been made as a result of taking such points into consideration, and makes it possible to achieve both the decomposition of an organic chlorine compound and the prevention of obstacles such as iron. In the present invention, the air dissolving step and the filtering step are steps for removing iron or manganese in the pumped ground water. The methane concentration of the mixed gas used in the present invention is determined in consideration of the methane / oxygen demand of methane-oxidizing bacteria, the explosiveness of the mixed gas, and the like, but a concentration of 5 vol% or less is usually appropriate. Further, as a methane gas supply source, digestive gas generated from a nearby wastewater treatment device can also be used. Further, in the present invention, it is effective to plant soil or activated sludge containing methane-oxidizing bacteria in the soil at the start of treatment because the treatment function can be rapidly expressed. It is effective to use a plant near the contaminated area as much as possible because it does not disturb the soil ecosystem of the area. Methane-oxidizing bacteria are often present in paddy soil, Hasuike soil, or activated sludge.
【０００８】また本発明では、空気溶解工程及びメタン
と空気の混合ガス溶解工程が、加圧密閉型のガス溶解装
置により行われる。これは、有機塩素化合物の大気中へ
の揮散を防止できる点で効果的である。溶解装置の圧力
は、動力費等を考慮して適宜決定されるが、通常は空気
溶解装置：５kgf ／cm2以下、混合ガス溶解装置：２kgf
／cm2 以下が適切である。また本発明では、ろ過工程
が圧力式の密閉型ろ過器であり、ろ材が除鉄、除マンガ
ン材である。このようなろ材としては、オキシ水酸化鉄
あるいは水和二酸化マンガンを被着されたものが有効で
ある。これにより、前述したような有機塩素化合物の揮
散を防止できるとともに、除鉄、除マンガンの能力を向
上させることができる。Further, in the present invention, the air melting step and the mixed gas melting step of methane and air are carried out by a pressure-sealed gas melting apparatus. This is effective in preventing volatilization of the organic chlorine compound into the atmosphere. The pressure of the melting device is appropriately determined in consideration of the power cost, etc., but usually the air melting device: 5 kgf / cm 2 or less, the mixed gas melting device: 2 kgf
/ Cm 2 or less is suitable. Further, in the present invention, the filtration step is a pressure-type hermetic filter, and the filter material is iron-removing and manganese-removing material. As such a filter medium, one coated with iron oxyhydroxide or hydrated manganese dioxide is effective. This makes it possible to prevent the volatilization of the organic chlorine compound as described above and improve the ability of removing iron and manganese.
【０００９】[0009]
【作用】本発明により、汚染土壌中にトリクロロエチレ
ンなどの有機塩素化合物分解能力を有するメタン酸化細
菌を優占種とする混合微生物系を生育させることが可能
で、メタン酸化細菌等の酸化作用により、土壌や地下水
に含まれるトリクロロエチレンを分解、無害化すること
が可能である。また、土壌中に酸素を供給することで生
ずる、酸化鉄などの生成を抑制でき、地下水帯の水理環
境や地下水の水質に変化を生ずることなく、汚染土壌の
修復を行うことができる。According to the present invention, it is possible to grow a mixed microbial system in which a methane-oxidizing bacterium having an ability to decompose an organochlorine compound such as trichlorethylene is a dominant species in a contaminated soil. It is possible to decompose and detoxify trichlorethylene contained in soil and groundwater. In addition, it is possible to suppress the generation of iron oxide and the like generated by supplying oxygen to the soil, and it is possible to repair the contaminated soil without changing the hydraulic environment of the groundwater zone and the water quality of the groundwater.
【００１０】[0010]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はこれに限定されない。
実施例１
図１に本発明の処理装置のフロー工程図を示す。図１に
おいて、１は土壌カラムで土壌２と汚染地下水３からな
り、該汚染地下水３をポンプ７で汲み上げ管１２によ
り、空気溶解槽４に導入してコンプレッサー８により空
気を吹き込んだ後、管１３からろ過器５に導入する。ろ
過器５で鉄、マンガンが除去された処理水は、管１４か
らメタンと空気の混合ガス溶解槽に導かれて、コンプレ
ッサー１０により吹き込まれるメタンと空気が処理水中
な溶解され、管１５により土壌２中に戻される。土壌２
中では、処理水中に溶解したメタンと酸素により土壌中
のメタン酸化細菌を優占種とする混合微生物系が生育
し、汚染源であるトリクロロエチレンを分解し無害化す
る。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. Example 1 FIG. 1 shows a flow chart of the processing apparatus of the present invention. In FIG. 1, reference numeral 1 denotes a soil column composed of soil 2 and contaminated groundwater 3. The contaminated groundwater 3 is pumped up by a pump 7 and introduced into an air-dissolving tank 4 by a pipe 12, and air is blown by a compressor 8 and then a pipe 13 To the filter 5. The treated water from which iron and manganese have been removed by the filter 5 is introduced from a pipe 14 to a mixed gas dissolving tank of methane and air, and the methane and air blown by the compressor 10 are dissolved in the treated water, and the pipe 15 causes soil to flow. Returned to 2. Soil 2
Among them, methane and oxygen dissolved in the treated water grow a mixed microbial system with methane-oxidizing bacteria in the soil as the dominant species, decomposing and detoxifying the pollution source trichlorethylene.
【００１１】図１の処理装置を用いて、次の運転条件で
実施した処理結果を以下に示す。
−運転条件−
・修復土壌カラム：内径２ｍ、深さ５ｍの密閉カラム。
これに土壌を４．５ｍ充填し、トリクロロエチレン濃度
５ｐｐｍの模擬汚染地下水を５ｍ3 加えた。
・地下水汲み上げポンプ：１台
深度４．４ｍから汲み上げ、処理水は深度３．５ｍに戻
した。
・汲み上げ水量：８０ml／分
・空気溶解装置：密閉タンク（φ６cm×高さ５０cm）
運転圧力：１kgf ／cm2
・ろ過装置：上向流式ろ過器（φ５cm×高さ３０cm）
ろ材として、オキシ水酸化鉄を被着させたケイ砂（有効
径１．２mm、均等係数１．２）を１５cm積層した
・混合ガス溶解装置：スプレータンク（φ６cm×高さ５
０cm）
運転圧力：０．５kgf ／cm2
混合ガス（メタン２vol%）注入量・・・１．５ml／分
上記の運転条件で、１年間の処理を行った結果を図２に
示す。このように、約２カ月後から、地下水のトリクロ
ロエチレンの低下が認められて、９カ月後の濃度は３０
μｇ／ｌに低下した。The results of treatments carried out under the following operating conditions using the treatment apparatus of FIG. 1 are shown below. -Operating conditions-Repaired soil column: A closed column having an inner diameter of 2 m and a depth of 5 m.
This was filled with 4.5 m of soil, and 5 m 3 of simulated contaminated groundwater having a trichloroethylene concentration of 5 ppm was added.・ Groundwater pumping pump: One pump pumped from a depth of 4.4 m and treated water returned to a depth of 3.5 m.・ Amount of pumped water: 80 ml / min ・ Air dissolving device: Closed tank (φ6 cm x height 50 cm) Operating pressure: 1 kgf / cm 2・ Filtration device: Upflow filter (φ5 cm x height 30 cm) As filter medium, oxy water 15 cm of silica sand coated with iron oxide (effective diameter 1.2 mm, uniformity coefficient 1.2) was layered ・ Mixed gas dissolving device: spray tank (φ6 cm x height 5)
Operating pressure: 0.5 kgf / cm 2 mixed gas (methane 2 vol%) injection rate ... Thus, after about 2 months, a decrease in trichlorethylene in groundwater was observed, and the concentration after 9 months was 30.
μg / l.
【００１２】[0012]
【発明の効果】以上説明したように、本発明により、土
壌や地下水中の有機塩素化合物を、生物学的に分解し、
無害化することが可能である。本発明は、これらの汚染
汚染土壌の修復や汚染地下水の処理には、広く採用され
ていくものである。As described above, according to the present invention, organic chlorine compounds in soil and groundwater are biologically decomposed,
It is possible to render it harmless. The present invention will be widely adopted for the restoration of these contaminated contaminated soils and the treatment of contaminated groundwater.
【図１】本発明の処理装置のフロー工程図である。FIG. 1 is a flow process diagram of a processing apparatus of the present invention.
【図２】本発明による処理実績を示すグラフである。FIG. 2 is a graph showing a processing result according to the present invention.
１：土壌カラム、２：土壌、３：汚染地下水、４：空気
溶解層、５：ろ過器、６：混合ガス溶解槽、７：汲み上
げポンプ、８，１０：コンプレッサー、９，１１：循環
ブロア、１２，１３，１４，１５：地下水循環管、１
６：空気導入管、１７：メタン、空気混合ガス導入管1: Soil column, 2: Soil, 3: Contaminated groundwater, 4: Air dissolving layer, 5: Filter, 6: Mixed gas dissolving tank, 7: Pumping pump, 8, 10: Compressor, 9, 11: Circulating blower, 12, 13, 14, 15: Groundwater circulation pipe, 1
6: Air introduction pipe, 17: Methane, air mixed gas introduction pipe
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山下 茂樹 神奈川県藤沢市本藤沢４丁目２番１号 株 式会社荏原総合研究所内 (72)発明者 下村 達夫 神奈川県藤沢市本藤沢４丁目２番１号 株 式会社荏原総合研究所内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Shigeki Yamashita 4-2-1 Honfujisawa, Fujisawa City, Kanagawa Prefecture Inside the EBARA Research Institute (72) Inventor Tatsuo Shimomura 4-2-1 Honfujisawa, Fujisawa City, Kanagawa Prefecture Inside the EBARA Research Institute
Claims (2)
及び地下水を処理する方法において、該汚染地域から汲
み上げた地下水を、空気溶解工程、ろ過工程及びメタン
と空気の混合ガスを溶解する工程に順次通した後に、地
下に戻す操作を繰り返すことにより土壌及び地下水を清
浄化することを特徴とする有機塩素化合物の処理方法。1. A method for treating soil and groundwater contaminated with an organic chlorine compound, wherein groundwater pumped from the contaminated area is sequentially passed through an air dissolving step, a filtering step and a step of dissolving a mixed gas of methane and air. After that, the method for treating an organochlorine compound is characterized in that soil and groundwater are purified by repeating the operation of returning to the underground.
及び地下水を処理する装置において、該汚染地域から地
下水を汲み上げる手段、汲み上げた地下水を順次通す空
気溶解装置、ろ過装置及びメタンと空気の混合ガスを溶
解する装置を有し、該各装置を通った処理水を地下に戻
す手段を有することによる土壌及び地下水を清浄化する
ための有機塩素化合物の処理装置。2. A device for treating soil and groundwater contaminated by organochlorine compounds, comprising means for pumping groundwater from the contaminated area, an air dissolving device for sequentially passing the pumped groundwater, a filtering device and a mixed gas of methane and air. An apparatus for treating an organochlorine compound for cleaning soil and groundwater, which has a device for dissolving and has means for returning the treated water that has passed through each device to the underground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3203593A JP2608493B2 (en) | 1991-07-19 | 1991-07-19 | Method and apparatus for cleaning soil and groundwater contaminated with organochlorine compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3203593A JP2608493B2 (en) | 1991-07-19 | 1991-07-19 | Method and apparatus for cleaning soil and groundwater contaminated with organochlorine compounds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0523692A true JPH0523692A (en) | 1993-02-02 |
| JP2608493B2 JP2608493B2 (en) | 1997-05-07 |
Family
ID=16476639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3203593A Expired - Fee Related JP2608493B2 (en) | 1991-07-19 | 1991-07-19 | Method and apparatus for cleaning soil and groundwater contaminated with organochlorine compounds |
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| JP (1) | JP2608493B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002210453A (en) * | 2001-01-17 | 2002-07-30 | Ueda Shinichi | Method for purifying soil |
| JP2005052837A (en) * | 2004-10-13 | 2005-03-03 | Japan Organo Co Ltd | Method for purifying polluted subsurface water and stratum and apparatus therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101201222B1 (en) | 2012-01-17 | 2012-11-15 | 안양대학교 산학협력단 | Extracting gas recycling method for early stabilization of landfill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683064A (en) * | 1984-01-16 | 1987-07-28 | Hallberg Rolf O | Process for decreasing the nitrate content in water |
| JPS6434380A (en) * | 1987-07-23 | 1989-02-03 | Du Pont | Microbiological decomposition of chlorinated aliphatic hydrocarbon |
| JPS6434499A (en) * | 1987-04-30 | 1989-02-03 | Ekoba Corp | Method of biologically decomposing halogen substituted aliphatic hydrocarbon and microbe used for said method |
| US5006250A (en) * | 1987-12-04 | 1991-04-09 | The Board Of Trustees Of The Leland Stanford Junior University | Pulsing of electron donor and electron acceptor for enhanced biotransformation of chemicals |
-
1991
- 1991-07-19 JP JP3203593A patent/JP2608493B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683064A (en) * | 1984-01-16 | 1987-07-28 | Hallberg Rolf O | Process for decreasing the nitrate content in water |
| JPS6434499A (en) * | 1987-04-30 | 1989-02-03 | Ekoba Corp | Method of biologically decomposing halogen substituted aliphatic hydrocarbon and microbe used for said method |
| JPS6434380A (en) * | 1987-07-23 | 1989-02-03 | Du Pont | Microbiological decomposition of chlorinated aliphatic hydrocarbon |
| US5006250A (en) * | 1987-12-04 | 1991-04-09 | The Board Of Trustees Of The Leland Stanford Junior University | Pulsing of electron donor and electron acceptor for enhanced biotransformation of chemicals |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002210453A (en) * | 2001-01-17 | 2002-07-30 | Ueda Shinichi | Method for purifying soil |
| JP2005052837A (en) * | 2004-10-13 | 2005-03-03 | Japan Organo Co Ltd | Method for purifying polluted subsurface water and stratum and apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2608493B2 (en) | 1997-05-07 |
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