JPH06246290A - Process and device for methane fermentation - Google Patents
Process and device for methane fermentationInfo
- Publication number
- JPH06246290A JPH06246290A JP3812293A JP3812293A JPH06246290A JP H06246290 A JPH06246290 A JP H06246290A JP 3812293 A JP3812293 A JP 3812293A JP 3812293 A JP3812293 A JP 3812293A JP H06246290 A JPH06246290 A JP H06246290A
- Authority
- JP
- Japan
- Prior art keywords
- methane
- denitrification
- methane fermentation
- liquid
- fermentation
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明はメタン発酵に関し、特
に都市ゴミや汚泥のような有機性廃棄物を湿式酸化処理
して得られる液（湿式酸化処理液）のような、硝酸イオ
ンを含有する有機性廃液を被処理液として嫌気性処理を
行うメタン発酵に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to methane fermentation, and in particular, it contains nitrate ions such as a liquid obtained by subjecting organic wastes such as municipal waste and sludge to wet oxidation treatment (wet oxidation treatment liquid). The present invention relates to methane fermentation in which anaerobic treatment is performed using an organic waste liquid as a liquid to be treated.
【０００２】[0002]
【従来の技術】従来、有機性廃棄物の処理方法として汚
泥や都市ゴミなどを対象として湿式酸化を行い、さらに
湿式酸化処理液を生物処理する方式が知られている。ま
た近年は湿式酸化を触媒を利用する処理方法が開発され
た。2. Description of the Related Art Conventionally, as a method for treating organic wastes, there has been known a method of subjecting sludge and municipal wastes to wet oxidation and subjecting the wet oxidation treatment liquid to biological treatment. Further, in recent years, a treatment method using a catalyst for wet oxidation has been developed.
【０００３】これらの湿式酸化処理方式では多かれ少か
れ、含窒素有機化合物が酸化されて硝酸イオンを生成す
る。硝酸イオンはメタン発酵を阻害するために、湿式酸
化処理液はメタン発酵の基質としては適していない。In these wet oxidation treatment systems, the nitrogen-containing organic compound is oxidized more or less to produce nitrate ions. Since the nitrate ion inhibits methane fermentation, the wet oxidation treatment liquid is not suitable as a substrate for methane fermentation.
【０００４】従って、湿式酸化処理による処理液をメタ
ン発酵基質に用いるための研究がなされており、本出願
人も硝酸イオンを含有する湿式酸化処理液に硫化ソーダ
等を添加して硝酸イオンをアンモニウムイオンに還元し
た後、メタン発酵処理する方法を特許出願している（特
願平５−２０８７４号明細書）。Therefore, studies have been conducted to use a treatment liquid obtained by the wet oxidation treatment as a methane fermentation substrate. The applicant of the present invention also added sodium sulfide or the like to a wet oxidation treatment liquid containing nitrate ions to convert the nitrate ions into ammonium. A patent application has been filed for a method of methane fermentation treatment after reduction to ions (Japanese Patent Application No. 5-20874).
【０００５】上記メタン発酵方法の説明図を図１に示
す。この図において１はメタン発酵槽であり、このメタ
ン発酵槽１に直接硫化ソーダを供給してメタン発酵を行
う構成となっている。An explanatory diagram of the methane fermentation method is shown in FIG. In this figure, reference numeral 1 is a methane fermentation tank, which is configured to directly supply sodium sulfide to the methane fermentation tank 1 for methane fermentation.
【０００６】[0006]
【発明が解決しようとする課題】しかし、硝酸イオンを
含有する有機性廃液に硫化ソーダ（Ｎa2Ｓ）を添加して
メタン菌に対して有害な硝酸イオンを無害なアンモニウ
ムイオンに還元する方法は、硫化ソーダを絶えず添加す
る必要があり、薬品コストがかかる。また、硫化ソーダ
を過剰に添加するとメタン菌に対して有害な影響を与え
る恐れがあるという課題が残されていた。However, there is a method of adding sodium sulfide (Na 2 S) to an organic waste liquid containing nitrate ions to reduce nitrate ions harmful to methane bacteria to harmless ammonium ions. , It is necessary to constantly add sodium sulfide, which causes chemical costs. Further, there remains a problem that excessive addition of sodium sulfide may have a harmful effect on methane bacteria.
【０００７】この発明は上記背景の下になされたもので
あり、湿式酸化処理液等の硝酸イオンを含む有機性廃液
を安価にかつ効率処理することのできるメタン発酵方法
及びメタン発酵装置を提供することを目的とする。The present invention has been made in view of the above background, and provides a methane fermentation method and a methane fermentation apparatus capable of inexpensively and efficiently treating an organic waste liquid containing nitrate ions such as a wet oxidation treatment liquid. The purpose is to
【０００８】[0008]
【課題を解決するための手段及び作用】上記課題を解決
するために、この発明の発明者は有機性廃液のメタン発
酵を行う際に、有機性廃液中に含まれる硝酸イオンを除
去するためにメタン発酵の前処理として内生脱窒（廃液
に含まれる有機物を水素供与体とする生物学的脱窒）を
行うことを検討した。Means and Actions for Solving the Problems In order to solve the above problems, the inventor of the present invention aims to remove nitrate ions contained in an organic waste liquid when performing methane fermentation of the organic waste liquid. As a pretreatment for methane fermentation, it was examined to perform endogenous denitrification (biological denitrification using organic matter contained in waste liquid as a hydrogen donor).
【０００９】このメタン発酵方法の概要を図２に示す。
この図において１はメタン発酵槽、２は脱窒槽であり、
この脱窒槽２に廃液及び水素供与体を供給して脱窒を行
った後に、この脱窒された廃液をメタン発酵槽１にてメ
タン発酵させる構成となっている。 しかし、メタン発酵の前処理として脱窒を行って硝酸イ
オンを除去する場合、メタノールのような水素供与体を
添加すると処理効率は高くなるが薬品コストがかかる。An outline of this methane fermentation method is shown in FIG.
In this figure, 1 is a methane fermentation tank, 2 is a denitrification tank,
After the waste liquid and the hydrogen donor are supplied to the denitrification tank 2 for denitrification, the denitrified waste liquid is subjected to methane fermentation in the methane fermentation tank 1. However, when denitrification is performed as a pretreatment for methane fermentation to remove nitrate ions, the addition of a hydrogen donor such as methanol increases the treatment efficiency but requires chemical costs.
【００１０】これに対し、水素供与体を供与せずに脱窒
処理を行うことも考えられる。このメタン発酵方法を図
３に示す。On the other hand, it is also possible to carry out denitrification without supplying a hydrogen donor. This methane fermentation method is shown in FIG.
【００１１】この図において１はメタン発酵槽、２は脱
窒槽であり、この脱窒槽２に廃液及を供給して脱窒を行
った後に、この脱窒された廃液をメタン発酵槽１にてメ
タン発酵させる構成となっている。In the figure, 1 is a methane fermentation tank, 2 is a denitrification tank, and after the waste liquid and the denitrification tank 2 are supplied for denitrification, the denitrified waste liquid is supplied to the methane fermentation tank 1. It is configured to ferment methane.
【００１２】このメタン発酵方法においては、その処理
効率は硝酸イオン廃液中の水素供与体（有機物）の構成
比により決定される。従って、水素供与体（有機物）が
不足すると処理効率が低下するという問題がある。In this methane fermentation method, the treatment efficiency is determined by the composition ratio of the hydrogen donor (organic matter) in the nitrate ion waste liquid. Therefore, if the hydrogen donor (organic substance) is insufficient, there is a problem that the treatment efficiency is reduced.
【００１３】そこで、本発明者は更に鋭意検討を重ねて
この発明を完成させた。Therefore, the present inventor has completed the present invention through further intensive studies.
【００１４】上記課題を解決するため、請求項１記載の
発明は、被処理液に脱窒処理を行って硝酸イオンを還元
除去した後にメタン発酵を行うことを特徴とするメタン
発酵方法を提供する。In order to solve the above-mentioned problems, the invention according to claim 1 provides a methane fermentation method characterized in that the liquid to be treated is subjected to denitrification to reduce and remove nitrate ions, and then methane fermentation is carried out. .
【００１５】上記のように被処理液に脱窒を行うこと
で、硝酸イオンが還元されてＮ2となって大気中に放散
される。このようにメタン発酵を阻害する硝酸イオンが
除去されるので、メタン発酵を円滑にかつ効率良く行う
ことができる。By denitrifying the liquid to be treated as described above, nitrate ions are reduced to N 2 and are diffused into the atmosphere. Since nitrate ions that inhibit methane fermentation are removed in this manner, methane fermentation can be performed smoothly and efficiently.
【００１６】請求項２記載の発明は、請求項１記載のメ
タン発酵方法において、前記脱窒処理時に水素供与体を
供給することを特徴とするメタン発酵方法を提供する。The invention according to claim 2 provides the methane fermentation method according to claim 1, characterized in that a hydrogen donor is supplied during the denitrification treatment.
【００１７】上記のようにメタン発酵の前処理として行
う脱窒処理において水素供与体を供給することにより、
廃液中の有機物のみを水素供与体とする脱窒（内生脱
窒）方法に比較して脱窒の処理効率を高めることができ
る。By supplying a hydrogen donor in the denitrification treatment performed as a pretreatment for methane fermentation as described above,
The denitrification treatment efficiency can be improved as compared with the denitrification (endogenous denitrification) method in which only the organic substances in the waste liquid are used as hydrogen donors.
【００１８】この水素供与体としては例えばメタノー
ル、メタン、イオウ（Ｓ）等が挙げられる。特に、メタ
ノールやチオ硫酸ソーダ（Ｎa2Ｓ2Ｏ3）を用いると薬剤
費等のコストは高くなるが脱窒速度は高くなる。Examples of the hydrogen donor include methanol, methane, sulfur (S) and the like. In particular, when methanol or sodium thiosulfate (Na 2 S 2 O 3 ) is used, the cost of chemicals and the like increases, but the denitrification rate increases.
【００１９】また、水素供与体として安価なイオウ
（Ｓ）を供給すると、内生脱窒とともにイオウ脱窒も行
われるので脱窒を促進することができる。更に、メタノ
ールを添加する脱窒方式より処理費用を安くすることが
できる。When inexpensive sulfur (S) is supplied as a hydrogen donor, sulfur denitrification is performed together with endogenous denitrification, so that denitrification can be promoted. Further, the treatment cost can be made lower than that of the denitrification method in which methanol is added.
【００２０】請求項３記載の発明は、請求項２記載のメ
タン発酵方法において、前記脱窒処理をメタン資化脱窒
にて行うとともに前記水素供与体としてメタンを用い、
更に前記メタン資化脱窒処理時には、前記メタン発酵時
に発生するメタンガスを供給することにより前記メタン
資化脱窒を行うことを特徴とするメタン発酵方法を提供
する。According to a third aspect of the present invention, in the methane fermentation method according to the second aspect, the denitrification treatment is performed by methane assimilation denitrification and methane is used as the hydrogen donor.
Further, there is provided a methane fermentation method characterized in that, during the methane utilization denitrification treatment, the methane utilization denitrification is performed by supplying methane gas generated during the methane fermentation.
【００２１】上記のように水素供与体としてメタンを利
用するメタン資化脱窒は脱窒速度はあまり速くはない
が、水素供与体であるメタンとしてメタン発酵時に生成
されるメタンを用いることで薬剤費が安くなり、コスト
面で有利である。As described above, the denitrification rate of methane-utilizing denitrification using methane as a hydrogen donor is not so fast, but the methane produced as a methane is used as a hydrogen donor. The cost is low, which is advantageous in terms of cost.
【００２２】また、イオウ脱窒においては脱窒反応によ
り生成されるイオウ酸化物によってメタン発酵が阻害さ
れる可能性があるが、このような阻害が生じる恐れもな
い。 請求項４記載の発明は、被処理液のメタン資化脱窒を行
う脱窒部と、前記脱窒部によってメタン資化脱窒された
被処理液のメタン発酵を行う発酵部と、前記発酵部にて
発生するメタンガスを前記脱窒部内の被処理液に供給す
るメタンガス供給部と、前記脱窒部にて発生する廃メタ
ンガスを再度前記脱窒部内の被処理液に循環供給するメ
タンガス循環供給部とを備えたことを特徴とするメタン
発酵装置を提供する。In sulfur denitrification, sulfur oxides produced by the denitrification reaction may inhibit methane fermentation, but there is no fear of such inhibition occurring. The invention according to claim 4 is a denitrification section for denitrifying the liquid to be treated with methane, a fermentation part for performing methane fermentation of the liquid to be treated denitrified with methane by the denitrification part, and the fermentation. Gas supply section for supplying methane gas generated in the denitrification section to the liquid to be treated in the denitrification section, and methane gas circulating supply for circulating the waste methane gas generated in the denitrification section to the liquid to be treated in the denitrification section again A methane fermentation device is provided.
【００２３】上記装置によれば、被処理液に脱窒を行う
ことで硝酸イオンが還元されてＮ2となって大気中に放
散される。このようにメタン発酵を阻害する硝酸イオン
が除去されるので、メタン発酵を円滑にかつ効率良く行
うことができる。According to the above apparatus, by denitrifying the liquid to be treated, the nitrate ions are reduced to N 2 and released into the atmosphere. Since nitrate ions that inhibit methane fermentation are removed in this manner, methane fermentation can be performed smoothly and efficiently.
【００２４】また、脱窒処理において水素供与体を供給
することにより、廃液中の有機物のみを水素供与体とす
る脱窒(内生脱窒)方法に比較して脱窒の処理効率を高め
ることができる。 更に、メタンガス供給部によってメタン発酵時に生成さ
れるメタンを水素供与体でとして脱窒部に供給し、更に
メタンガス循環供給部によって廃メタンガスを循環再供
給することでメタンガスを有効利用しているのでコスト
面でも有利である。Further, by supplying a hydrogen donor in the denitrification treatment, the denitrification treatment efficiency can be improved as compared with a denitrification (endogenous denitrification) method in which only organic substances in the waste liquid are used as the hydrogen donor. You can In addition, methane produced during methane fermentation is supplied to the denitrification section as a hydrogen donor by the methane gas supply section, and waste methane gas is circulated and re-supplied by the methane gas circulation supply section, so that the methane gas is effectively used. It is also advantageous in terms of aspects.
【００２５】尚、このメタン発酵装置にてはイオウ脱窒
を行っていないので、イオウ酸化物によってメタン発酵
が阻害される恐れもない。Since sulfur denitrification is not carried out in this methane fermentation apparatus, there is no fear of sulfur oxides inhibiting methane fermentation.
【００２６】[0026]
【実施例】この実施例においては、硝酸イオン含有有機
性廃液をメタン発酵処理する場合において、メタン菌に
対して有害な硝酸イオンを除去する作用のある脱窒処理
をメタン発酵前処理として行った。[Examples] In this example, in the case where a nitrate ion-containing organic waste liquid was subjected to methane fermentation treatment, denitrification treatment having an action of removing nitrate ions harmful to methane bacteria was performed as a methane fermentation pretreatment. .
【００２７】また脱窒の処理効率を高めるために水素供
与体としてイオウやメタンなどを脱窒槽に供給した。Further, in order to improve the treatment efficiency of denitrification, sulfur, methane or the like was supplied to the denitrification tank as a hydrogen donor.
【００２８】尚、イオウやメタンなどはメタノールに比
較して脱窒速度を高める効果は低いが、脱窒反応の水素
供与体となり得ることは第１４回下水道研究発表会予稿
集ｐ２２４（１９７７）等にて報告されている。Although sulfur and methane have a lower effect of increasing the denitrification rate as compared with methanol, they may be hydrogen donors for the denitrification reaction, such as Proceedings of the 14th Sewer Research Conference p224 (1977). Has been reported in.
【００２９】還元イオウはその酸化数が−２から＋４ま
でのものが知られており、チオ硝酸ソーダ（Ｎa2Ｓ
2Ｏ3）を用いた場合は特に脱窒速度が速くなるが、薬剤
費が高価となる。従ってこの実施例では安価なイオウ
（Ｓ）を使用した。It is known that reduced sulfur has an oxidation number of -2 to +4, and is represented by sodium thionitrate (Na 2 S).
When 2 O 3 ) is used, the denitrification rate is particularly high, but the chemical cost is high. Therefore, inexpensive sulfur (S) was used in this example.
【００３０】この方式においては廃液中の有機物を水素
供与体とする通常の脱窒以外にイオウ脱窒が行われるの
で、脱窒が速やかにかつ十分に行われ、メタン発酵を円
滑に行うことができる。In this method, sulfur denitrification is carried out in addition to the normal denitrification using the organic matter in the waste liquid as a hydrogen donor, so that denitrification can be carried out quickly and sufficiently and methane fermentation can be carried out smoothly. it can.
【００３１】このメタン発酵方法の概略は、図２におい
てＨ−donorとしてＳを用いたものとして表される。こ
のメタン発酵方法によって有機廃液のメタン発酵処理を
行ったところ、比較的安価かつ速やかにメタン発酵処理
を行うことができた。An outline of this methane fermentation method is represented by using S as H-donor in FIG. When the methane fermentation treatment of the organic waste liquid was carried out by this methane fermentation method, the methane fermentation treatment could be carried out relatively inexpensively and quickly.
【００３２】次に、メタンを脱窒反応の水素供与体とす
るメタン資化脱窒のシステムフローを図４に示す。Next, FIG. 4 shows a system flow of methane assimilation denitrification using methane as a hydrogen donor of the denitrification reaction.
【００３３】この図において１はメタン発酵槽、２はメ
タン資化脱窒槽であり、廃液をメタン資化脱窒槽２にて
脱窒した後にメタン発酵槽１にてメタン発酵を行う。In the figure, 1 is a methane fermentation tank, and 2 is a methane utilization denitrification tank. The waste liquid is denitrified in the methane utilization denitrification tank 2 and then methane fermentation is performed in the methane fermentation tank 1.
【００３４】この際、メタン資化脱窒槽で発生したメタ
ンガスをガスホルダー３に貯留し、ブロワー４を用いて
脱窒槽２に吹きこむ。At this time, the methane gas generated in the methane-utilizing denitrification tank is stored in the gas holder 3 and blown into the denitrification tank 2 using the blower 4.
【００３５】メタン発酵槽で資化されなかったメタンガ
スは再びガスホルダー３にもどり、繰り返し循環利用さ
れる。尚、この図において廃液の流れは実線で示し、メ
タンガスの流れは破線で示した。The methane gas that has not been assimilated in the methane fermentation tank returns to the gas holder 3 and is repeatedly circulated. In this figure, the flow of waste liquid is shown by the solid line, and the flow of methane gas is shown by the broken line.
【００３６】図４のようにメタン発酵を行うことで、廃
液中の有機物を水素供与体とする通常の脱窒以外にメタ
ン資化脱窒が行われる。従って脱窒が速やかにかつ十分
に行われるので、メタン発酵も円滑に行うことができ
る。By carrying out methane fermentation as shown in FIG. 4, methane assimilation denitrification is carried out in addition to the normal denitrification using the organic matter in the waste liquid as a hydrogen donor. Therefore, denitrification is carried out promptly and sufficiently, and methane fermentation can be carried out smoothly.
【００３７】[0037]
【発明の効果】この発明によれば、メタン発酵を行う際
に予め被処理液の脱窒を行っているのでメタン菌に対し
て有害な硝酸イオンが除去される。従ってメタン発酵を
円滑に行わせることができる。According to the present invention, when the methane fermentation is carried out, denitrification of the liquid to be treated is carried out in advance, so that nitrate ions harmful to methane bacteria are removed. Therefore, methane fermentation can be performed smoothly.
【００３８】また、脱窒時に水素供与体を供給すること
によって内生脱窒方式に比較して脱窒の処理効率を高め
ることもできる。Further, by supplying a hydrogen donor at the time of denitrification, the treatment efficiency of denitrification can be enhanced as compared with the endogenous denitrification system.
【図１】従来例に係るメタン発酵方法の説明図。FIG. 1 is an explanatory diagram of a methane fermentation method according to a conventional example.
【図２】脱窒時に水素供与体を供給するメタン発酵方法
の説明図。FIG. 2 is an explanatory diagram of a methane fermentation method of supplying a hydrogen donor during denitrification.
【図３】脱窒を伴うメタン発酵方法の説明図。FIG. 3 is an explanatory view of a methane fermentation method with denitrification.
【図４】本発明の一実施例に係るメタン発酵方法の説明
図。FIG. 4 is an explanatory diagram of a methane fermentation method according to an embodiment of the present invention.
１…メタン発酵槽 ２…脱窒槽 ３…ガスホルダー ４…ブロワー 1 ... Methane fermentation tank 2 ... Denitrification tank 3 ... Gas holder 4 ... Blower
Claims (4)
を還元除去した後にメタン発酵を行うことを特徴とする
メタン発酵方法。1. A methane fermentation method comprising performing denitrification on a liquid to be treated to reduce and remove nitrate ions, and then performing methane fermentation.
て、 前記脱窒処理時に水素供与体を供給することを特徴とす
るメタン発酵方法。2. The methane fermentation method according to claim 1, wherein a hydrogen donor is supplied during the denitrification treatment.
て、 前記脱窒処理をメタン資化脱窒にて行うとともに前記水
素供与体としてメタンを用い、 更に前記メタン資化脱窒処理時には、前記メタン発酵時
に発生するメタンガスを供給することにより前記メタン
資化脱窒を行うことを特徴とするメタン発酵方法。3. The methane fermentation method according to claim 2, wherein the denitrification treatment is performed by methane assimilation denitrification, methane is used as the hydrogen donor, and the methane is used at the time of the methane assimilation denitrification treatment. A methane fermentation method characterized in that the methane utilization denitrification is performed by supplying methane gas generated during fermentation.
と、 前記脱窒部によってメタン資化脱窒された被処理液のメ
タン発酵を行う発酵部と、 前記発酵部にて発生するメタンガスを前記脱窒部内の被
処理液に供給するメタンガス供給部と、 前記脱窒部にて発生する廃メタンガスを再度前記脱窒部
内の被処理液に循環供給するメタンガス循環供給部とを
備えたことを特徴とするメタン発酵装置。4. A denitrification section for performing methane assimilation and denitrification of the liquid to be treated, a fermentation section for performing methane fermentation of the liquid to be treated as methane assimilated and denitrified by the denitrification section, and a fermentation unit. A methane gas supply unit that supplies the generated methane gas to the liquid to be treated in the denitrification unit and a methane gas circulation supply unit that circulates the waste methane gas generated in the denitrification unit to the liquid to be treated in the denitrification unit again. A methane fermentation device characterized by being equipped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3812293A JPH06246290A (en) | 1993-02-26 | 1993-02-26 | Process and device for methane fermentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3812293A JPH06246290A (en) | 1993-02-26 | 1993-02-26 | Process and device for methane fermentation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06246290A true JPH06246290A (en) | 1994-09-06 |
Family
ID=12516657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3812293A Pending JPH06246290A (en) | 1993-02-26 | 1993-02-26 | Process and device for methane fermentation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06246290A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013192965A (en) * | 2012-03-15 | 2013-09-30 | Swing Corp | Treatment method and treatment apparatus of organic wastewater and organic waste |
-
1993
- 1993-02-26 JP JP3812293A patent/JPH06246290A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013192965A (en) * | 2012-03-15 | 2013-09-30 | Swing Corp | Treatment method and treatment apparatus of organic wastewater and organic waste |
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