JPH05212371A - Purification of subterranean water or earth - Google Patents
Purification of subterranean water or earthInfo
- Publication number
- JPH05212371A JPH05212371A JP2251692A JP2251692A JPH05212371A JP H05212371 A JPH05212371 A JP H05212371A JP 2251692 A JP2251692 A JP 2251692A JP 2251692 A JP2251692 A JP 2251692A JP H05212371 A JPH05212371 A JP H05212371A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- tower
- organic halogen
- groundwater
- volatile organic
- 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
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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は地下水又は土壌の浄化方
法に係り、特に、地下水や土壌中に低濃度で含有されて
いる有機塩素化合物等の揮発性有機ハロゲン化合物を、
自然に生息する微生物（以下「自然菌」と称する場合が
ある。）を利用して効率的に分解除去することにより、
地下水又は土壌を浄化する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for purifying groundwater or soil, and more particularly to a volatile organic halogen compound such as an organic chlorine compound contained in groundwater or soil at a low concentration.
By efficiently decomposing and removing microorganisms that naturally live (hereinafter sometimes referred to as "natural bacteria"),
It relates to a method for purifying groundwater or soil.
【０００２】[0002]
【従来の技術】地下水や土壌は、クロロメタン類、クロ
ロエチレン類、クロロベンゼン類等の有機塩素化合物な
どの揮発性有機ハロゲン化合物で汚染されている。しか
しながら、従来、このような地下水や土壌中に含有され
ている有機塩素化合物等を分解して地下水や土壌を効果
的に浄化する方法が確立されておらず、その浄化方法の
開発が望まれている。2. Description of the Related Art Groundwater and soil are contaminated with volatile organic halogen compounds such as organic chlorine compounds such as chloromethanes, chloroethylenes and chlorobenzenes. However, conventionally, a method for decomposing such organic chlorine compounds contained in groundwater or soil to effectively purify groundwater or soil has not been established, and development of such a purification method is desired. There is.
【０００３】なお、特開平１−３４４９９号公報には、
芳香族分解経路によってハロゲン置換脂肪族炭化水素を
分解できる微生物を該炭化水素と共に培養してこれを分
解させる際、誘導物質の存在下に自然菌に芳香族分解経
路を獲得させるか、又は、遺伝子組換菌に同経路を保持
させることが記載されている。Incidentally, Japanese Patent Application Laid-Open No. 1-34499 discloses that
When a microorganism capable of decomposing a halogen-substituted aliphatic hydrocarbon by an aromatic decomposition pathway is cultured with the hydrocarbon and decomposed, a natural bacterium is allowed to acquire the aromatic decomposition pathway in the presence of an inducer, or a gene It has been described that recombinant bacteria retain the same pathway.
【０００４】[0004]
【発明が解決しようとする課題】特開平１−３４４９９
号公報に記載の方法を、地下水や土壌中の有機ハロゲン
化合物の処理に適用する場合、天然菌を用いる方法で
は、汚染場所に更にメタン、フェノール、トルエン等の
誘導物質を添加する必要がある。即ち、有機ハロゲン化
合物のなかには、それ自体、自然菌のエネルギー源とし
て摂取分解されるものもあるが、一方で自然菌のエネル
ギー源となり得ず、標準的な生物処理が適用できないも
のも数多く存在している。このため、誘導物質の添加は
必須となるが、誘導物質を添加することは、地下水や土
壌に新たな二次汚染を生じるおそれがあり、好ましいこ
とではない。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When the method described in the publication is applied to the treatment of organic halogen compounds in groundwater or soil, it is necessary to add inducers such as methane, phenol and toluene to the contaminated place in the method using natural bacteria. That is, although some of the organic halogen compounds themselves are ingested and decomposed as the energy source of natural bacteria, on the other hand, many of them cannot be the energy source of natural bacteria and standard biological treatment cannot be applied. ing. Therefore, the addition of the inducer is essential, but the addition of the inducer is not preferable because it may cause new secondary pollution in groundwater or soil.
【０００５】また、遺伝子組換菌を用いる方法は、組換
菌の培養のための手間及び費用を要する上に、この菌を
環境に開放するには、十分な安全確認が必要であること
から、実用的ではない。In addition, the method using a recombinant bacterium requires labor and cost for culturing the recombinant bacterium, and sufficient safety confirmation is required to open the bacterium to the environment. , Not practical.
【０００６】本発明は上記従来の問題点を解決し、地下
水又は土壌中に含有される揮発性有機ハロゲン化合物を
自然菌を利用して、二次汚染を引き起こすことなく効率
的に分解除去することにより、地下水又は土壌を高度に
浄化する方法を提供することを目的とする。The present invention solves the above-mentioned conventional problems and efficiently decomposes and removes volatile organic halogen compounds contained in groundwater or soil by using natural bacteria without causing secondary pollution. Therefore, it is an object of the present invention to provide a method for highly purifying groundwater or soil.
【０００７】[0007]
【課題を解決するための手段】本発明の地下水又は土壌
の浄化方法は、揮発性有機ハロゲン化合物で汚染された
地下水又は土壌からガスストリッピングにより揮発性有
機ハロゲン化合物を気相へ移行させる第１の工程と、該
第１の工程で得られた揮発性有機ハロゲン化合物を含む
気相を、揮発性有機ハロゲン化合物を誘導物質の存在下
に分解できる微生物と接触させる第２の工程とを備えて
なることを特徴とする。A method for purifying groundwater or soil according to the present invention is a first method for transferring volatile organohalogen compounds to a gas phase from groundwater or soil contaminated with volatile organohalogen compounds by gas stripping. And a second step of contacting the gas phase containing the volatile organohalogen compound obtained in the first step with a microorganism capable of decomposing the volatile organohalogen compound in the presence of an inducer. It is characterized by
【０００８】以下、本発明を図面を参照して詳細に説明
する。図１は本発明の実施に好適な処理装置を示す断面
図である。The present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view showing a processing apparatus suitable for carrying out the present invention.
【０００９】図１において、１は地下水又は土壌をガス
ストリッピング（本実施例ではエアストリッピング）す
る放散塔であり、２は放散塔１から送給されるガスを生
物処理する処理塔である。In FIG. 1, 1 is a stripping tower for gas stripping (air stripping in this embodiment) groundwater or soil, and 2 is a treatment tower for biologically treating the gas sent from the stripping tower 1.
【００１０】放散塔１は、上部に地下水等の原水供給管
１１、下部にエアストリッピング用のポンプ１３を備え
る空気導入管１２がそれぞれ接続されており、内部には
セラミック等の充填材１４が充填されている。また、塔
頂にはエアストリッピングにより生じたガスの排出管１
５が設けられており、この排出管１５は処理塔２の下部
に接続されている。１６は処理水の排水管である。The stripping tower 1 is connected at its upper part with a raw water supply pipe 11 for ground water and the like, and at its lower part is connected with an air introducing pipe 12 equipped with a pump 13 for air stripping, and is filled with a filler 14 such as ceramics inside. Has been done. In addition, at the top of the tower, a gas discharge pipe 1 for gas produced by air stripping
5 is provided, and the discharge pipe 15 is connected to the lower part of the processing tower 2. Reference numeral 16 is a drainage pipe for the treated water.
【００１１】処理塔２の内部には自然菌（微生物）の充
填層２１，２２，２３が複数段（図１においては３段）
形成されており、頂部には処理ガスの排出管２４が設け
られている。また、誘導物質となる栄養剤や中和剤等の
導入管２５及びこれを塔底部から塔上部に循環して散布
するためのポンプ２６を備える循環配管２７が設けられ
ている。Inside the processing tower 2, there are a plurality of layers (3 layers in FIG. 1) of natural bacteria (microorganisms) packed layers 21, 22 and 23.
And a processing gas discharge pipe 24 is provided at the top. Further, a circulation pipe 27 is provided, which is provided with an introduction pipe 25 for a nutrient, a neutralizing agent, etc., which is an inducer, and a pump 26 for circulating and spraying the introduction pipe 25 from the tower bottom to the tower top.
【００１２】図示の装置を用いて、本発明の方法に従っ
て、地下水（又は土壌）の浄化を行なうには、まず、原
水（地下水）を供給管１１より放散塔１の上部に供給す
ると共に、空気を導入管１２より導入して原水をエアス
トリッピングし、原水中に含有される揮発性有機ハロゲ
ン化合物をガス化する。このエアストリッピングによる
ガス化で得られた揮発性有機ハロゲン化合物を含むガス
（以下「原ガス」と称する場合がある。）は、放散塔１
から排出管２４を経て処理塔２に送給される。In order to purify groundwater (or soil) according to the method of the present invention using the apparatus shown in the figure, first, raw water (groundwater) is supplied from the supply pipe 11 to the upper part of the diffusion tower 1 and air. Is introduced through the introduction pipe 12 to perform air stripping of the raw water to gasify the volatile organic halogen compound contained in the raw water. The gas containing a volatile organic halogen compound (hereinafter sometimes referred to as “raw gas”) obtained by the gasification by the air stripping is the stripping tower 1
Is sent to the processing tower 2 through the discharge pipe 24.
【００１３】一方、揮発性有機ハロゲン化合物が分離さ
れた処理水は、排水管１６より系外へ排出される。On the other hand, the treated water from which the volatile organic halogen compound has been separated is discharged from the system through the drain pipe 16.
【００１４】処理塔２に導入された原ガス中の揮発性有
機ハロゲン化合物は、充填層２１，２２，２３に保持さ
れた自然菌により、誘導物質（栄養剤）の存在下分散処
理され、処理ガスは排出管２４より系外へ排出される。The volatile organohalogen compound in the raw gas introduced into the treatment tower 2 is dispersed and treated in the presence of an inducer (nutrient) by natural bacteria retained in the packed beds 21, 22, 23. The gas is discharged to the outside of the system through the discharge pipe 24.
【００１５】本実施例の方法において、放散塔１におけ
るエアストリッピングの処理条件としては特に制限はな
く、原水中の揮発性有機ハロゲン化合物が効率的にガス
化できる条件であれば良く、原水流量、空気供給量は原
水水質等に応じて適宜決定される。In the method of this embodiment, the air stripping treatment conditions in the stripping tower 1 are not particularly limited as long as the volatile organic halogen compounds in the raw water can be efficiently gasified. The air supply amount is appropriately determined according to the raw water quality and the like.
【００１６】一方、処理塔２に充填される自然菌として
は、誘導物質の存在下に揮発性有機ハロゲン化合物を分
解し得るものであれば良く、例えば、Methylosinus tri
chosporium OB 3B(ATCC No.35070) 等のメタン資化菌等
の容易に入手可能な菌を用いることができる。（なお、
このATCC No.35070 は American Type Culture Colleci
ton(12301 Parklawn Drive Rockville, Maryland 20852
-1776, U.S.A) にて入手できる。）これらの自然菌は、
予め誘導物質で分散能力を付与した後充填層に植種した
り、別途培養槽を設けて、適宜交換又は補充するように
しても良い。On the other hand, the natural fungus packed in the treatment tower 2 may be any one capable of decomposing a volatile organic halogen compound in the presence of an inducer, for example, Methylosinus tri
A readily available bacterium such as methane-utilizing bacterium such as chosporium OB 3B (ATCC No.35070) can be used. (Note that
This ATCC No.35070 is an American Type Culture Colleci
ton (12301 Parklawn Drive Rockville, Maryland 20852
-1776, USA). ) These natural fungi are
You may make it disperse | distribute ability with an inducer beforehand, and then seed | inoculate in a packed bed, or you may provide a culture tank separately and it may make it exchange or replenish suitably.
【００１７】この自然菌を担持する充填層の充填材とし
てはセラミック等を用いることができる。この充填層は
必ずしも複数段に設ける必要はなく、１段でも良いが、
複数段に設けることにより、処理ガスの揮発性有機ハロ
ゲン化合物含有率をより一層低くすることが可能とされ
る。Ceramics or the like can be used as the filler of the packed bed carrying the natural bacteria. This filling layer does not necessarily have to be provided in a plurality of stages, but may be a single stage,
By providing the gas in a plurality of stages, it is possible to further lower the volatile organic halogen compound content of the processing gas.
【００１８】誘導物質（栄養剤）は、通常の場合１００
ｐｐｍ以下の低濃度で必要に応じて間欠供給する。この
誘導物質の供給時は、放散塔１からの処理塔２への原ガ
ス供給は停止する。従って、処理対象揮発性有機ハロゲ
ン化合物が、トリクロロエチレン等の誘導物質の存在が
必須のものである場合には、処理塔２への誘導物質の供
給と放散塔１からの原ガスの導入とを適当な間隔で交互
に行なうようにするのが良い。この場合、放散塔１から
の原ガスの供給を停止することができない系であれば、
１塔の放散塔に対して、２塔以上の処理塔を設けて適宜
原ガス流路を切り換えるようにすれば良い。The inducer (nutrient) is usually 100
Intermittently supply as needed at a low concentration of ppm or less. When the inducer is supplied, the supply of raw gas from the stripping tower 1 to the processing tower 2 is stopped. Therefore, when the volatile organohalogen compound to be treated requires the presence of an inducer such as trichlorethylene, it is appropriate to supply the inducer to the treatment tower 2 and introduce the raw gas from the desorption tower 1. It is better to alternate at regular intervals. In this case, if the system cannot stop the supply of raw gas from the stripping tower 1,
For one diffusion tower, two or more processing towers may be provided so that the raw gas passages are switched appropriately.
【００１９】なお、誘導物質としては自然菌に揮発性有
機ハロゲン化合物分散能力を付与し得るものであれば良
く、特に制限はないが、通常の場合、フェノール、トル
エン、メタン等の水溶液を用いることができる。The inducer is not particularly limited as long as it can impart the ability to disperse volatile organic halogen compounds to natural fungi, but in general, an aqueous solution of phenol, toluene, methane or the like is used. You can
【００２０】また、中和剤は、処理塔２内が、自然菌に
よる分散能力が最適に保てるｐＨ範囲、例えばｐＨ６．
５〜７．５程度となるように、適宜供給される。The neutralizing agent is used in the treatment tower 2 in a pH range where the dispersion ability of natural bacteria can be optimally maintained, for example, pH6.
It is appropriately supplied so as to be about 5 to 7.5.
【００２１】本発明において、処理対象とする地下水や
土壌は、揮発性有機ハロゲン化合物を数ｐｐｍといった
低濃度で含有するものであることから、この地下水や土
壌をエアストリッピングして得られる原ガス中の揮発性
有機ハロゲン化合物も非常に低濃度で含有されている。
従って、処理塔においては、このような低濃度の揮発性
有機ハロゲン化合物を効率的に分解し得るよう、用いる
自然菌が処理対象揮発性有機ハロゲン化合物に対して高
い基質親和性を有するように、誘導物質の添加、ガス流
量、塔容量等の処理条件を設定することが重要である。In the present invention, the groundwater or soil to be treated contains volatile organic halogen compounds at a low concentration such as several ppm. Therefore, in the raw gas obtained by air stripping the groundwater or soil. The volatile organohalogen compound is also contained in a very low concentration.
Therefore, in the treatment tower, in order to efficiently decompose such low-concentration volatile organohalogen compounds, the natural bacteria used have a high substrate affinity for the volatile organohalogen compounds to be treated, It is important to set the processing conditions such as the addition of the inducer, the gas flow rate and the tower capacity.
【００２２】このような本発明の方法において、処理対
象となる揮発性有機ハロゲン化合物としては、トリクロ
ロエチレン、ジクロロエチレン等の有機塩素化合物が挙
げられる。In the method of the present invention as described above, examples of the volatile organic halogen compound to be treated include organic chlorine compounds such as trichlorethylene and dichloroethylene.
【００２３】[0023]
【作用】本発明の方法においては、地下水や土壌中の揮
発性有機ハロゲン化合物をガスストリッピングによりガ
ス化し、得られた揮発性有機ハロゲン化合物含有ガスに
ついて誘導物質の存在下自然菌により分解処理する。In the method of the present invention, the volatile organohalogen compound in groundwater or soil is gasified by gas stripping, and the obtained volatile organohalogen compound-containing gas is decomposed by natural bacteria in the presence of an inducer. ..
【００２４】このため、安全性が高く、容易に入手可能
な自然菌を用いて、地下水や土壌に直接誘導物質を添加
することなく、従って、誘導物質による二次汚染を引き
起こすことなく、地下水又は土壌を高度に浄化すること
ができる。For this reason, it is possible to use natural fungi, which are highly safe and easily available, without adding the inducer directly to the groundwater or the soil, and thus without causing secondary pollution by the inducer. The soil can be highly purified.
【００２５】[0025]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明する。EXAMPLES The present invention will be described in more detail with reference to the following examples.
【００２６】実施例１ 図１に示す装置を用いて、本発明に従って下記条件によ
り地下水の浄化を行なった。Example 1 Using the apparatus shown in FIG. 1, groundwater was purified according to the present invention under the following conditions.
【００２７】処理条件 放散塔 原水流量（ＬＶ）：４０ｍ／ｈｒ 空気／原水比：３０ 処理塔 塔容積：４．７ｍ3 原ガス流量（ＳＶ）：５０ｈｒ-1 誘導物質：メタン （１．５ｍｇ／リットルのメタン水溶液を４．７ｍ3 ／
ｈｒの流量で１日２回１２時間毎に２時間流した。この
間、原ガスの供給は停止する。） なお、処理塔には中和剤として２０ｍＭのリン酸緩衝液
（ｐＨ７．０）を１日に２回０．５ｍ3 ／ｈｒの流量で
１時間流すことにより、塔内のｐＨを６．５〜７．５程
度に維持した。また、処理塔内の自然菌としてはMethyl
osinus trichosporium OB 3Bをセラミックに担持して充
填した。 Treatment conditions Dispersion tower Raw water flow rate (LV): 40 m / hr Air / raw water ratio: 30 Treatment tower Tower volume: 4.7 m 3 Raw gas flow rate (SV): 50 hr −1 Inducer: Methane (1.5 mg / Liter of methane aqueous solution 4.7 m 3 /
A flow rate of hr was applied twice a day for 12 hours every 12 hours. During this period, the supply of raw gas is stopped. ) A 20 mM phosphate buffer solution (pH 7.0) as a neutralizing agent is passed through the treatment tower twice a day at a flow rate of 0.5 m 3 / hr for 1 hour to adjust the pH in the tower to 6. It was maintained at about 5 to 7.5. In addition, as a natural fungus in the treatment tower, Methyl
Osinus trichosporium OB 3B was loaded on a ceramic.
【００２８】この結果、原水（地下水）、処理水（放散
塔からの排出水）、原ガス（放散塔からの排出ガス）及
び処理ガス（処理塔からの排出ガス）のトリクロロエチ
レン濃度は表１の通りであり、本発明方法によれば、地
下水を高度に浄化できることが明らかである。As a result, the trichlorethylene concentrations of raw water (ground water), treated water (exhaust water from the diffusion tower), raw gas (exhaust gas from the diffusion tower) and treated gas (exhaust gas from the treatment tower) are shown in Table 1. It is clear that groundwater can be highly purified by the method of the present invention.
【００２９】[0029]
【表１】 [Table 1]
【００３０】[0030]
【発明の効果】以上詳述した通り、本発明の地下水又は
土壌の浄化方法によれば、安全性が高く、容易に入手可
能な自然菌を用いて、新たな二次汚染を引き起こすこと
なく、地下水又は土壌中の揮発性有機ハロゲン化合物を
効率的に分解して、地下水又は土壌を高度に浄化するこ
とができる。As described above in detail, according to the groundwater or soil purification method of the present invention, a highly safe and easily available natural bacterium is used, without causing new secondary pollution, Volatile organohalogen compounds in groundwater or soil can be efficiently decomposed to highly purify groundwater or soil.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施に好適な処理装置を示す断面図で
ある。FIG. 1 is a sectional view showing a processing apparatus suitable for carrying out the present invention.
１ 放散塔 ２ 処理塔 １４ 充填材 ２１，２２，２３ 充填層 1 Dispersion tower 2 Treatment tower 14 Packing material 21,22,23 Packed bed
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/58 Ａ 7158−4Ｄ 9/00 Ａ 8515−4Ｄ Continuation of front page (51) Int.Cl. 5 Identification number Office reference number FI technical display location C02F 1/58 A 7158-4D 9/00 A 8515-4D
Claims (1)
地下水又は土壌からガスストリッピングにより揮発性有
機ハロゲン化合物を気相へ移行させる第１の工程と、 該第１の工程で得られた揮発性有機ハロゲン化合物を含
む気相を、揮発性有機ハロゲン化合物を誘導物質の存在
下に分解できる微生物と接触させる第２の工程とを備え
てなる地下水又は土壌の浄化方法。1. A first step of transferring a volatile organic halogen compound to a gas phase by gas stripping from groundwater or soil contaminated with the volatile organic halogen compound, and the volatile property obtained in the first step. A second step of contacting a gas phase containing an organic halogen compound with a microorganism capable of decomposing a volatile organic halogen compound in the presence of an inducer, the method for purifying groundwater or soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2251692A JPH05212371A (en) | 1992-02-07 | 1992-02-07 | Purification of subterranean water or earth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2251692A JPH05212371A (en) | 1992-02-07 | 1992-02-07 | Purification of subterranean water or earth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05212371A true JPH05212371A (en) | 1993-08-24 |
Family
ID=12084936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2251692A Pending JPH05212371A (en) | 1992-02-07 | 1992-02-07 | Purification of subterranean water or earth |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05212371A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6171844B1 (en) | 1996-08-19 | 2001-01-09 | Toyota Jidosha Kabushiki Kaisha | Microorganism and method for environmental purification using the same |
| KR100948553B1 (en) * | 2009-04-29 | 2010-03-18 | 이동근 | Groundwater purifying system |
| CN102989310A (en) * | 2012-12-11 | 2013-03-27 | 雷学军 | Processing device and method of offensive odor in biomass landfill process |
-
1992
- 1992-02-07 JP JP2251692A patent/JPH05212371A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6171844B1 (en) | 1996-08-19 | 2001-01-09 | Toyota Jidosha Kabushiki Kaisha | Microorganism and method for environmental purification using the same |
| US6521444B1 (en) | 1996-08-19 | 2003-02-18 | Toyota Jidosha Kabushiki Kaisha | Microorganism and method for environmental purification using the same |
| KR100948553B1 (en) * | 2009-04-29 | 2010-03-18 | 이동근 | Groundwater purifying system |
| CN102989310A (en) * | 2012-12-11 | 2013-03-27 | 雷学军 | Processing device and method of offensive odor in biomass landfill process |
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