JP3303907B2 - Methane fermentation of organic waste - Google Patents
Methane fermentation of organic wasteInfo
- Publication number
- JP3303907B2 JP3303907B2 JP25149597A JP25149597A JP3303907B2 JP 3303907 B2 JP3303907 B2 JP 3303907B2 JP 25149597 A JP25149597 A JP 25149597A JP 25149597 A JP25149597 A JP 25149597A JP 3303907 B2 JP3303907 B2 JP 3303907B2
- Authority
- JP
- Japan
- Prior art keywords
- methane fermentation
- organic waste
- anaerobic digestion
- fermentation
- water
- 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.)
- Expired - Lifetime
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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、有機性廃棄物のメ
タン発酵法に係り、特に、生ごみ等の夾雑物を含有する
有機性廃棄物を嫌気性消化してメタン発酵させる方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for methane fermentation of organic waste, and more particularly to a method for anaerobic digestion of methane fermentation of organic waste containing impurities such as garbage.
【０００２】[0002]
【従来の技術】従来、生ごみ等の有機物は、ほとんどが
他の一般ごみと共に焼却、埋立処分されている。しか
し、近年、ごみの減量化、再資源化のため、一部では家
庭向けコンポスターの普及促進、厨芥の分別収集、コン
ポスト化等の努力が行われている。また、最近、西欧で
普及している生ごみのメタン発酵法が、経済的で環境に
やさしい方法として日本でも技術導入され、また技術開
発が行われている。従来から生ごみのメタン発酵におい
て、生ごみは比較的易生物分解性のため多量のバイオガ
スを発生できるので、高率的なエネルギー回収を行うこ
とができることが知られている。しかしながら、生ごみ
中には通常多量の夾雑物、例えば軟質、硬質プラスチッ
ク製容器包装、紙製容器包装、食器、金属が含有されて
いる。このためメタン発酵を行う前処理工程として、破
袋装置、粗大異物の手選別、夾雑物自動分離装置、金属
除去用磁選装置、破砕装置等の様々な装置、及びこれら
の装置を連結する搬送装置が必要であり、そのため、装
置構成、操作が煩雑となり、円滑な前処理操作が困難と
なるとともに、装置の建設費用も高額となる等の問題が
あった。2. Description of the Related Art Conventionally, most organic substances such as garbage are incinerated and landfilled together with other general garbage. However, in recent years, efforts have been made to promote the spread of household composters, separate collection of kitchen waste, and composting in order to reduce and recycle waste. Recently, methane fermentation of garbage, which has become widespread in Western Europe, has been introduced and developed in Japan as an economical and environmentally friendly method. Conventionally, it has been known that in methane fermentation of garbage, a large amount of biogas can be generated because garbage is relatively easily biodegradable, so that highly efficient energy recovery can be performed. However, garbage usually contains a large amount of contaminants such as soft and hard plastic containers and packaging, paper containers and packaging, tableware, and metals. For this reason, various devices such as a bag-breaking device, a hand-sorting of coarse foreign substances, an automatic device for separating impurities, a magnetic separation device for removing metals, a crushing device, and the like as a pretreatment process for performing methane fermentation, and a transport device for connecting these devices Therefore, there are problems that the configuration and operation of the apparatus are complicated, smooth pre-processing operation is difficult, and the construction cost of the apparatus is high.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点を解決し、特別な装置を用いることなく、簡
単な手段で夾雑物を分離・除去できる有機性廃棄物のメ
タン発酵法を提供することを課題とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and provides a method for separating and removing contaminants by a simple means without using a special apparatus. The task is to provide
【０００４】[0004]
【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、有機性廃棄物を酸発酵工程で可溶化し
たのちに、嫌気性消化工程でメタン発酵を行うメタン発
酵法において、前記酸発酵工程では、嫌気性消化工程か
らの脱離液を注入して混合攪拌し、易生物分解性有機物
を可溶化したのちに、該有機性廃棄物中の難生物分解性
夾雑物を分離して、該可溶化液を嫌気性消化工程に導入
し、メタン発酵を行うことを特徴とする有機性廃棄物の
メタン発酵法としたものである。前記メタン発酵法にお
いて、脱離液としては、嫌気性消化工程から引き抜いた
ままの脱離液を用いるか、又は該脱離液を脱水分離した
分離水を用いることができ、前記酸発酵工程では、比重
の高い夾雑物を底部から引き抜くのが良い。Means for Solving the Problems To solve the above problems, the present invention provides a methane fermentation method in which organic waste is solubilized in an acid fermentation step and then methane fermentation is performed in an anaerobic digestion step. In the acid fermentation step, after injecting the effluent from the anaerobic digestion step, mixing and stirring to solubilize the easily biodegradable organic matter, the hardly biodegradable impurities in the organic waste are separated. Then, the lysate is introduced into an anaerobic digestion step, and methane fermentation is carried out to provide a methane fermentation method for organic waste. In the methane fermentation method, as the effluent, a effluent that has been withdrawn from the anaerobic digestion step may be used, or separated water obtained by dehydrating and separating the effluent may be used. It is good to pull out the contaminants with high specific gravity from the bottom.
【０００５】[0005]
【発明の実施の形態】次に、本発明を図面を用いて詳細
に説明する。図１は、本発明のメタン発酵法を実施する
ための工程図の一例である。図１において、有機性廃棄
物である生ごみ１は袋を破袋装置２で破られた後、酸発
酵槽３でメタン発酵脱離液１１あるいはその脱離液を脱
水した脱水分離水１４とともに混合・攪拌され、夾雑物
が洗浄され、また可溶化によって生ごみ有機物が可溶化
分解されて、夾雑物との分離が促進される。金属食器、
瀬戸物、砂等の比重の高い夾雑物４は酸発酵槽３の底部
に枕積され、随時引き抜かれる。酸発酵槽流出液５はス
クリーン等の夾雑物分離装置６で夾雑物７が分離され、
分離水８はメタン発酵する嫌気性消化槽９に導入され、
流入液中の有機物は嫌気的条件下でバイオガス１０に分
解される。バイオガスは脱硫装置を経由してガスタンク
に貯留され、用途に応じて利用される。メタン発酵する
嫌気性消化槽９は機械攪拌あるいはガス攪拌が行われ
る。メタン発酵脱離液１１は脱離液脱水工程１２に導入
され、脱水汚泥１３と脱水分離水１４に分離され、脱水
分離水１４はさらに公知の水処理技術によって処理され
る。Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is an example of a process chart for carrying out the methane fermentation method of the present invention. In FIG. 1, garbage 1 which is an organic waste is crushed by a bag breaking device 2 and then methane fermentation desorbed liquid 11 in an acid fermentation tank 3 or dewatered separated water 14 obtained by dehydrating the desorbed liquid. Mixing / stirring is performed to wash impurities, and solubilization causes organic garbage to be solubilized and decomposed, thereby facilitating separation from the impurities. Metal tableware,
Contaminants 4 having a high specific gravity, such as set products and sand, are piled up at the bottom of the acid fermentation tank 3 and pulled out at any time. The contaminants 7 are separated from the acid fermentation tank effluent 5 by a contaminant separation device 6 such as a screen.
Separated water 8 is introduced into anaerobic digestion tank 9 for methane fermentation,
Organic matter in the influent is decomposed into biogas 10 under anaerobic conditions. Biogas is stored in a gas tank via a desulfurization device, and is used depending on the application. The anaerobic digestion tank 9 for methane fermentation is subjected to mechanical stirring or gas stirring. The methane fermentation desorbed liquid 11 is introduced into a dewatering liquid dewatering step 12, and is separated into dewatered sludge 13 and dewatered separated water 14, and the dewatered separated water 14 is further treated by a known water treatment technique.
【０００６】酸発酵槽３には、蒸気等を注入して水温を
５０〜５５℃で運転するとともに、脱水分離水１４の滞
留日数を１〜５日とするとよい。これによって生物学的
な酸発酵が進行してＳＳが可溶化し、発酵が円滑に進行
する。酸発酵槽に注入する希釈水（脱離液１１あるいは
及び分離水１４）量は、酸発酵槽３の攪拌装置の種類に
よって異なるが、例えば攪拌装置としてスクリュー攪拌
機が設置されている場合は、固形物濃度として１０〜１
５％程度になるように注入するとよい。夾雑物分離装置
６としてスクリーンを用いた場合は経済的な分離が可能
であるが、まだ含水率が高いのでスクリュープレス等の
脱水機１５で脱水し、脱水分離水１６は酸発酵槽３ある
いは嫌気性消化槽９に導入するとよい。夾雑物７の脱水
を脱水機１５を省略して脱離液脱水機１２を利用しても
よいが、脱水分離水１４中に夾雑物７に同伴して可溶化
した有機物が混入するので、分離水１４の水処理工程の
負荷が高くなる。The acid fermentation tank 3 is preferably operated at a water temperature of 50 to 55 ° C. by injecting steam or the like, and the dewatered separated water 14 is preferably kept for 1 to 5 days. As a result, biological acid fermentation proceeds, solubilizing the SS, and fermentation proceeds smoothly. The amount of dilution water (desorbed liquid 11 or separated water 14) to be injected into the acid fermentation tank varies depending on the type of the stirrer in the acid fermentation tank 3. For example, when a screw stirrer is installed as the stirrer, solid 10-1 as substance concentration
It is good to inject so that it may be about 5%. When a screen is used as the impurity separation device 6, economical separation is possible. However, since the water content is still high, dewatering is performed by a dehydrator 15 such as a screw press, and the dewatered and separated water 16 is removed from the acid fermentation tank 3 or anaerobic. It is good to introduce into the digestive tank 9. Although the dehydrator 15 may be omitted and the dehydrating liquid dehydrator 12 may be used for dehydration of the contaminants 7, the dewatered and separated water 14 contains organic substances solubilized with the contaminants 7. The load of the water treatment process of the water 14 increases.
【０００７】嫌気性消化槽９への流入液は、水温５５℃
程度、滞留日数１０〜１５日で有機物がガス化する。脱
水工程１２において、含水率の低い脱水汚泥１３を得る
ためには、汚泥脱水用ポリマーをＳＳの１．０％程度注
入し、従来の脱水装置である遠心脱水機、ベルトプレ
ス、スクリュープレス、フィルタープレス等の脱水機に
よって、含水率８０数％以下、好ましくは７０％前後に
することが望ましい。消化汚泥の性状がよければ、ポリ
マーの注入量は減少あるいは無添加にすることができ
る。次に、図２に本発明のメタン発酵法を実施するため
の他の工程図を示す。図１と相違する点は、図２では夾
雑物分離装置６として、脱水能力の高いスクリュープレ
ス脱水機を用いており、夾雑物を低含水率の脱水物とし
て排出することができるので、図１の脱水機１５を省略
することができ、装置構成を簡単化することができる。
この場合、水量負荷が高くなるので、スクリュープレス
脱水機６は図１のスクリュープレス脱水機１５よりも大
型になる。The influent flowing into the anaerobic digestion tank 9 has a water temperature of 55 ° C.
Organic matter is gasified in about 10 to 15 days. In the dewatering step 12, in order to obtain the dewatered sludge 13 having a low water content, a sludge dewatering polymer is injected at about 1.0% of SS, and a conventional dewatering apparatus such as a centrifugal dewatering machine, a belt press, a screw press, and a filter is used. With a dehydrator such as a press, the water content is desirably 80% or less, preferably around 70%. If the properties of the digested sludge are good, the injection amount of the polymer can be reduced or not added. Next, FIG. 2 shows another process chart for carrying out the methane fermentation method of the present invention. The difference from FIG. 1 is that in FIG. 2, a screw press dehydrator having a high dehydration capacity is used as the impurity separation device 6, and the impurities can be discharged as a low moisture content dewatered product. The dehydrator 15 can be omitted, and the device configuration can be simplified.
In this case, since the water load increases, the screw press dewatering machine 6 becomes larger than the screw press dewatering machine 15 of FIG.
【０００８】図３に、本発明のメタン発酵法を実施する
ためのもう一つの工程図を示す。図３は、固液分離装置
６を、例えば酸発酵槽流出液５の分離脱水用のスクリュ
ープレス６とメタン発酵脱離液１１の脱水工程用スクリ
ュープレス６を兼用させた方法のフローである。この場
合、固液分離の時間帯を調整してスクリュープレスを利
用するが、スクリュープレスは流入する被脱水物に対応
して、回転速度、脱水物出口のクリアランス（開口）の
開度等を調整すればよい。また、メタン発酵脱離液１１
の脱水に際しては、脱水用のポリマーが必要になること
が多いので、適宜ポリマー注入量を確認するためのテー
ブルテストを行っておくとよい。FIG. 3 shows another process chart for carrying out the methane fermentation method of the present invention. FIG. 3 is a flowchart of a method in which the solid-liquid separation device 6 is used, for example, as a screw press 6 for separating and dewatering the effluent 5 of the acid fermentation tank and a screw press 6 for dehydrating the methane fermentation desorbed solution 11. In this case, the time zone of solid-liquid separation is adjusted and a screw press is used. The screw press adjusts the rotation speed, the degree of opening of the clearance (opening) of the dehydrated substance outlet, etc., in accordance with the inflowing dehydrated substance. do it. Also, the methane fermentation desorbed liquid 11
Since a polymer for dehydration is often required at the time of dehydration, a table test for appropriately confirming the amount of injected polymer may be performed.
【０００９】[0009]
【実施例】以下に、本発明を実施例により具体的に説明
する。 実施例１ 図１の工程図に従って生ごみをメタン発酵させた処理例
について述べる。 生ごみ（１）： ５ｔ／日、 破袋機（２）： 簡易破砕機、 酸発酵槽（スクリュー攪拌設備付帯、沈澱物排出管付
帯）３、 有効容積 ： １０ｍ3 、 水温 ： ５５℃、 脱水分離水注入量（１４）： ４ｍ3 ／日、 滞留日数 ： ２日 夾雑物分離装置（６）：スクリーン（回転ドラム式、目
開き１．０ｍｍ）、 処理量 ： １４．０ｍ3 ／日、 分離夾雑物量： ０．５ｍ3 ／日、The present invention will be described below in more detail with reference to examples. Example 1 A processing example in which garbage is subjected to methane fermentation according to the process diagram of FIG. 1 will be described. Garbage (1): 5t / day, breakage machine (2): Simplified crusher, acid fermentation tank (screw stirrer equipment accessory, precipitate discharge pipe attached) 3, effective volume: 10 m 3, water temperature: 55 ° C., dried Separation water injection amount (14): 4 m 3 / day, staying days: 2 days Contaminant separation device (6): screen (rotary drum type, opening 1.0 mm), treatment amount: 14.0 m 3 / day, separation Contaminant amount: 0.5 m 3 / day,
【００１０】 嫌気性消化槽（スクリュー攪拌設備付帯）（９）、 有効容積 ： ５０ｍ3 、 水温 ： ５５℃、 滞留日数 ： １０日 メタン発生量： １１０ｍ3 ／日、 脱離液脱水機（１２）：スクリュープレス脱水機、 カチオンポリマー注入量（汚泥用）：対ＳＳ ０．３〜１．０％、 処理量 ： １３．５ｍ3 ／日、 処理水量 ： ｐＨ ７〜７．５、 ＳＳ ３１０〜７５０ｍｇ／リットル、 ＢＯＤ ６００〜９００ｍｇ／リットル 夾雑物脱水機（１５）：スクリュープレス脱水機、 処理量 ： ０．５ｍ3 ／日、Anaerobic digestion tank (with screw stirring equipment) (9), effective volume: 50 m 3 , water temperature: 55 ° C., staying days: 10 days Methane generation amount: 110 m 3 / day, desorbing liquid dehydrator (12) : Screw press dehydrator, Injection amount of cationic polymer (for sludge): 0.3 to 1.0% based on SS, Treatment amount: 13.5 m 3 / day, Treatment water amount: pH 7 to 7.5, SS 310 to 750 mg / Liter, BOD 600-900 mg / l impurity dehydrator (15): screw press dehydrator, throughput: 0.5 m 3 / day,
【００１１】実施例２ 次に本発明を、図２の工程図で行った処理例について述
べる。 生ごみ（１）： ５ｔ／日、 破袋機（２）： 簡易破砕機、 酸発酵槽（酸発酵槽、スクリュー攪拌設備付帯、沈澱物
排出管付帯）（３）、 有効容積 ： １０ｍ3 、 水温 ： ５５℃、 脱水分離水注入量（１４）： ４ｍ3 ／日、 滞留日数 ： ２日 夾雑物分離装置（６）：スクリュープレス脱水機、 処理量 ： １４．０ｍ3 ／日、 分離夾雑物量： ０．１ｍ3 ／日、Embodiment 2 Next, a description will be given of an example of processing performed by the present invention with reference to the process chart of FIG. Garbage (1): 5t / day, Bag breaker (2): Simple crusher, acid fermenter (with acid fermenter, screw stirring equipment, sediment discharge pipe) (3), effective volume: 10m 3 , Water temperature: 55 ° C., dewatered and separated water injection amount (14): 4 m 3 / day, staying days: 2 days Impurity separation device (6): screw press dehydrator, throughput: 14.0 m 3 / day, amount of contaminants separated : 0.1 m 3 / day,
【００１２】 嫌気性消化槽（スクリュー攪拌設備付帯）（９）、 有効容積 ： ５０ｍ3 、 水温 ： ５５℃、 滞留日数 ： １０日 メタン発生量： １１５ｍ3 ／日、 脱離液脱水機（１２）：スクリュープレス脱水機、 カチオンポリマー注入量（汚泥用）：対ＳＳ ０．３〜１．０％、 処理量 ： １３．９ｍ3 ／日、 処理水量 ： ｐＨ ７．０〜７．５、 ＳＳ ３３０〜７２０ｍｇ／リットル、 ＢＯＤ ７００〜９００ｍｇ／リットルAnaerobic digestion tank (with screw stirring equipment) (9), effective volume: 50 m 3 , water temperature: 55 ° C., number of staying days: 10 days Methane generation: 115 m 3 / day, dehydrating liquid dehydrator (12) : Screw press dehydrator, cationic polymer injection amount (for sludge): 0.3 to 1.0% of SS, treatment amount: 13.9 m 3 / day, treatment water amount: pH 7.0 to 7.5, SS 330 ~ 720mg / L, BOD 700 ~ 900mg / L
【００１３】（処理結果）実施例１、２のいずれの方法
によっても、夾雑物のトラブルを発生することなく、円
滑なメタン発酵を行うことができた。また、従来の前処
理工程で使用していた乾式の回転式夾雑物除去装置の夾
雑物除去率は、７０％程度であったが、本発明では、図
１の方式では約８５％、図２の方式では約９０％の夾雑
物除去率を達成することができた。(Treatment results) In any of the methods of Examples 1 and 2, smooth methane fermentation could be carried out without causing any trouble of impurities. Further, the foreign matter removal rate of the dry rotary foreign matter removal apparatus used in the conventional pretreatment step was about 70%, but in the present invention, about 85% in the method of FIG. With this method, a contaminant removal rate of about 90% could be achieved.
【００１４】[0014]
【発明の効果】本発明によれば、有機性廃棄物中の夾雑
物の除去にあたり、次のような効果を奏することができ
る。 （ａ）簡単な方法で、自動機械分離機よりも高率の夾雑
物の除去を行うことができる。 （ｂ）夾雑物を除去するための、前処理工程の構成（分
離機械、搬送装置等）を大幅に簡略化することができ
る。そのため、比較的用地面積に制限のある敷地でも、
メタン発酵施設の建設が可能となり、建設費用も低額に
なる。 （ｃ）前記前処理工程が簡略化したために、点検箇所が
少なくなり、機械的な故障箇所の減少も期待できる。 （ｄ）煩雑で不衛生な夾雑物除去操作を著しく省力化で
き、作業環境も大幅に改善することができる。 （ｅ）機械数を減少することにより、前処理工程におけ
る機械駆動電力量を削減できるので、経済的な処理を行
うことができる。According to the present invention, the following effects can be obtained in removing impurities from organic waste. (A) It is possible to remove contaminants at a higher rate than an automatic mechanical separator by a simple method. (B) The configuration of the pretreatment step (separation machine, transfer device, etc.) for removing contaminants can be greatly simplified. Therefore, even on sites with relatively limited land area,
Construction of a methane fermentation facility is possible, and construction costs are low. (C) Since the pre-processing step is simplified, the number of inspection locations is reduced, and the number of mechanical failure locations can be expected. (D) The operation of removing complicated and unsanitary contaminants can be saved significantly, and the working environment can be greatly improved. (E) By reducing the number of machines, the amount of mechanical drive power in the pre-processing step can be reduced, so that economic processing can be performed.
【図１】本発明のメタン発酵法を実施するための一例を
示す工程図。FIG. 1 is a process chart showing an example for carrying out the methane fermentation method of the present invention.
【図２】本発明のメタン発酵法を実施するための他の例
を示す工程図。FIG. 2 is a process chart showing another example for carrying out the methane fermentation method of the present invention.
【図３】本発明のメタン発酵法を実施するためのもう一
つの例を示す工程図。FIG. 3 is a process chart showing another example for carrying out the methane fermentation method of the present invention.
１：生ごみ、２：破袋装置、３：酸発酵槽、４：夾雑物
（比重の高い）、５：酸発酵槽流出液、６：夾雑物分離
装置、７：夾雑物、８：分離水、９：嫌気性消化槽、１
０：バイオガス、１１：メタン発酵脱離液、１２：脱離
液脱水機、１３：脱水汚泥、１４：脱水分離水、１５：
脱水機、１６：分離水1: garbage, 2: bag breaking device, 3: acid fermenter, 4: contaminants (high specific gravity), 5: acid fermenter effluent, 6: contaminant separator, 7: contaminants, 8: separation Water, 9: Anaerobic digester, 1
0: biogas, 11: methane fermentation desorbed liquid, 12: desorbed liquid dehydrator, 13: dehydrated sludge, 14: dehydrated separated water, 15:
Dehydrator, 16: Separated water
Claims (3)
のちに、嫌気性消化工程でメタン発酵を行うメタン発酵
法において、前記酸発酵工程では、嫌気性消化工程から
の脱離液を注入して混合攪拌し、易生物分解性有機物を
可溶化したのちに、該有機性廃棄物中の難生物分解性夾
雑物を分離して、該可溶化液を嫌気性消化工程に導入
し、メタン発酵を行うことを特徴とする有機性廃棄物の
メタン発酵法。In a methane fermentation method in which an organic waste is solubilized in an acid fermentation step and then methane fermentation is performed in an anaerobic digestion step, in the acid fermentation step, a liquid desorbed from the anaerobic digestion step is used. After injecting and mixing and solubilizing the easily biodegradable organic matter, the hardly biodegradable impurities in the organic waste are separated, and the lysate is introduced into the anaerobic digestion step, A methane fermentation method for organic waste, comprising performing methane fermentation.
抜いたままの脱離液であるか、又は該脱離液を脱水分離
した分離水であることを特徴とする請求項１記載の有機
性廃棄物のメタン発酵法。2. The elimination liquid according to claim 1, wherein the elimination liquid is a elimination liquid extracted from the anaerobic digestion step or a separation water obtained by dehydrating and separating the elimination liquid. Methane fermentation of organic waste.
を底部から引き抜くことを特徴とする請求項１記載の有
機性廃棄物のメタン発酵法。3. The methane fermentation method for organic waste according to claim 1, wherein in the acid fermentation step, impurities having a high specific gravity are withdrawn from the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25149597A JP3303907B2 (en) | 1997-09-02 | 1997-09-02 | Methane fermentation of organic waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25149597A JP3303907B2 (en) | 1997-09-02 | 1997-09-02 | Methane fermentation of organic waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1177005A JPH1177005A (en) | 1999-03-23 |
| JP3303907B2 true JP3303907B2 (en) | 2002-07-22 |
Family
ID=17223659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25149597A Expired - Lifetime JP3303907B2 (en) | 1997-09-02 | 1997-09-02 | Methane fermentation of organic waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3303907B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006281106A (en) * | 2005-03-31 | 2006-10-19 | Kubota Corp | Pretreatment method and apparatus of organic waste |
| KR100809607B1 (en) | 2006-09-13 | 2008-03-06 | 주식회사 부강테크 | Processing mothod and processing equipment for excretions of animals |
| JP2008246461A (en) * | 2007-03-30 | 2008-10-16 | Mhi Environment Engineering Co Ltd | Apparatus for pretreatment or post-treatment of methane fermentation, post-treatment system for methane fermentation, and method thereof |
| JP2012011265A (en) * | 2010-06-29 | 2012-01-19 | Takuma Co Ltd | Methane fermentation residue dehydration system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4945035B2 (en) * | 2001-07-24 | 2012-06-06 | 三機工業株式会社 | Methane gas generation system |
| JP2004174317A (en) * | 2002-11-25 | 2004-06-24 | Mitsubishi Heavy Ind Ltd | Methane fermentation treatment apparatus and method for garbage |
| JP2005329396A (en) * | 2004-04-19 | 2005-12-02 | Sumitomo Heavy Ind Ltd | Methane fermentation system |
-
1997
- 1997-09-02 JP JP25149597A patent/JP3303907B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006281106A (en) * | 2005-03-31 | 2006-10-19 | Kubota Corp | Pretreatment method and apparatus of organic waste |
| KR100809607B1 (en) | 2006-09-13 | 2008-03-06 | 주식회사 부강테크 | Processing mothod and processing equipment for excretions of animals |
| JP2008246461A (en) * | 2007-03-30 | 2008-10-16 | Mhi Environment Engineering Co Ltd | Apparatus for pretreatment or post-treatment of methane fermentation, post-treatment system for methane fermentation, and method thereof |
| JP2012011265A (en) * | 2010-06-29 | 2012-01-19 | Takuma Co Ltd | Methane fermentation residue dehydration system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1177005A (en) | 1999-03-23 |
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