JP2004290866A - Treatment method and apparatus for organic waste - Google Patents

Treatment method and apparatus for organic waste Download PDF

Info

Publication number
JP2004290866A
JP2004290866A JP2003088186A JP2003088186A JP2004290866A JP 2004290866 A JP2004290866 A JP 2004290866A JP 2003088186 A JP2003088186 A JP 2003088186A JP 2003088186 A JP2003088186 A JP 2003088186A JP 2004290866 A JP2004290866 A JP 2004290866A
Authority
JP
Japan
Prior art keywords
sludge
digestion tank
organic waste
heat exchanger
circulating
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
Application number
JP2003088186A
Other languages
Japanese (ja)
Other versions
JP4250994B2 (en
Inventor
Koji Fuchigami
浩司 渕上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
JFE Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JFE Engineering Corp filed Critical JFE Engineering Corp
Priority to JP2003088186A priority Critical patent/JP4250994B2/en
Publication of JP2004290866A publication Critical patent/JP2004290866A/en
Application granted granted Critical
Publication of JP4250994B2 publication Critical patent/JP4250994B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Landscapes

  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment method and apparatus for organic wastes which are fast in a decomposition rate of sludge, but are little in the generation amount of debris and further are large in the recovering amount of digestive gas. <P>SOLUTION: The treatment method for the organic wastes comprises agitating the untreated sludge in an anaerobic state within a digestion tank 1 to ferment and decompose organic materials, heating a part of the sludge drawn out of the digestion tank 1 by the digestive gas produced by the decomposition through a heat exchanger 2 and returning the heated circulating sludge into the digestion tank 1. A solubilization apparatus 3 is disposed behind the heat exchanger 2 and the circulating sludge heated by the heat exchanger 2 is subjected to solubilization treatment. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、有機性廃棄物の処理方法および装置、特に、汚泥の分解速度が速く、しかも、残渣発生量が少なく、さらに、消化ガス回収量が多い、有機性廃棄物の処理方法および装置に関するものである。
【０００２】
【従来の技術】
し尿、浄化槽汚泥、食品工場排水等の高濃度有機性汚水、生物処理工程からの有機性汚泥、食品廃棄物、家畜糞尿、生ゴミ等の有機性廃棄物の処理方法として、有機性廃棄物を安定化し、減容化し、消化ガスとしてエネルギー回収する嫌気性消化を利用した有機性廃棄物の処理方法がある。
【０００３】
この有機性廃棄物の処理方法を、図面を参照しながら説明する。
【０００４】
図８は、有機性廃棄物の従来処理方法を示すフロー図である。
【０００５】
図８において、１は、消化タンク、２は、熱交換器、３は、可溶化装置であり、上述した有機性廃棄物としての未処理汚泥は、以下のようにして処理される。
【０００６】
未処理汚泥は、３〜５％の固形物濃度に濃縮される。この濃縮汚泥は、３５℃程度に加熱された後、消化タンク１内に投入され、ここで嫌気性状態で攪拌され、酸発酵菌やメタン発酵菌の力によって有機物が分解される。このようにして分解処理された汚泥は、消化タンク１内から引き抜かれ、脱水処理後、例えば、焼却処理される。
【０００７】
消化タンク１内から引き抜かれた汚泥の一部は、熱交換器２を介して４０から４５℃に加温された後、再度、消化タンク１内に投入されて、消化タンクの加温に利用される。この汚泥の加温の熱源としては、消化タンク１内において嫌気性消化の副産物として生成するメタンガスを主成分とする消化ガスが有効利用される。
【０００８】
【発明が解決しようとする課題】
しかしながら、上述した従来技術は、以下のような問題を有していた。
（１）消化タンク１内において有機物は、２０〜３０日間かけて平均して１／２程度分解されるが、分解時間がかかりすぎる。
（２）（１）で述べたように有機物の分解速度が遅いので、残渣発生量が多く、その後の汚泥の処理に手間と時間がかかる。
（３）（１）で述べたように有機物の分解速度が遅いので、回収できる消化ガス量が少ない。
【０００９】
従って、この発明の目的は、消化タンク内での有機物の分解速度が速く、汚泥発生量が少なく、しかも、消化ガス量の回収量を増やすことができる有機性廃棄物の処理方法を提供することにある。
【００１０】
【課題を解決するための手段】
請求項１に記載された発明は、消化タンク内において嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解し、分解により消化ガスを得ると共に、前記消化タンクから引き抜かれた汚泥の一部を熱交換器を介して加温し、この加温した循環汚泥を前記消化タンク内に戻す、有機性廃棄物の処理方法において、前記熱交換器の後段に可溶化装置を設けて、前記熱交換器により加温された前記循環汚泥を可溶化処理することに特徴を有するものである。
【００１１】
請求項２に記載された発明は、消化タンク内において嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解し、分解により消化ガスを得ると共に、前記消化タンクから引き抜かれた汚泥の一部を熱交換器を介して加温し、この加温した循環汚泥を前記消化タンク内に戻す、有機性廃棄物の処理方法において、前記循環汚泥の一部を可溶化装置により可溶化処理した後、前記消化タンク内に戻すことに特徴を有するものである。
【００１２】
請求項３に記載された発明は、請求項１または２に記載された、有機性廃棄物の処理方法において、可溶化装置の前段に汚泥前処理手段を設けて、循環汚泥を前処理することに特徴を有するものである。
【００１３】
請求項４に記載された発明は、請求項３に記載された、有機性廃棄物の処理方法において、汚泥前処理手段は、未処理汚泥のｐＨを調整することに特徴を有するものである。
【００１４】
請求項５に記載された発明は、請求項３に記載された、有機性廃棄物の処理方法において、汚泥前処理手段は、熱交換器により加温された循環汚泥を予め可溶化処理することに特徴を有するものである。
【００１５】
請求項６に記載の発明は、請求項３から５の何れか１つに記載された、有機性廃棄物の処理方法において、未処理汚泥を汚泥前処理手段により前処理した後、消化タンクに投入し、その間は、消化タンクからの循環汚泥の引き抜きを停止することに特徴を有するものである。
【００１６】
請求項７に記載された発明は、請求項１から６の何れか１つに記載された、有機性廃棄物の処理方法において、未処理汚泥に生ゴミを混ぜて消化タンクに投入することに特徴を有するものである。
【００１７】
請求項８に記載された発明は、請求項７に記載された、有機性廃棄物の処理方法において、生ゴミの可溶化手段を設けることに特徴を有するものである。
【００１８】
請求項９に記載された発明は、嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解する消化タンクと、前記消化タンクから引き抜かれた汚泥の一部を加温する熱交換器とを備え、前記熱交換器により加温された循環汚泥は、前記消化タンク内に戻される、有機性廃棄物の処理装置において、前記熱交換器の後段に、前記熱交換器により加温された前記循環汚泥を可溶化処理する可溶化装置が設けられていることに特徴を有するものである。
【００１９】
請求項１０に記載された発明は、嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解する消化タンクと、前記消化タンクから引き抜かれた汚泥の一部を加温する熱交換器とを備え、前記熱交換器により加温された循環汚泥は、前記消化タンク内に戻される、有機性廃棄物の処理装置において、前記循環汚泥の一部を直接、可溶化処理する可溶化装置が設けられ、可溶化処理された循環汚泥は、前記消化タンク内に戻されることに特徴を有するものである。
【００２０】
請求項１１に記載された発明は、請求項９または１０に記載された、有機性廃棄物の処理装置において、可溶化装置の前段に汚泥前処理手段が設けられ、汚泥前処理手段により循環汚泥が前処理された後、可溶化装置に送られることに特徴を有するものである。
【００２１】
請求項１２に記載された発明は、請求項１１に記載された、有機性廃棄物の処理装置において、汚泥前処理手段は、未処理汚泥のｐＨを調整することに特徴を有するものである。
【００２２】
請求項１３に記載された発明は、請求項１１に記載された、有機性廃棄物の処理装置において、汚泥前処理手段は、熱交換器により加温された循環汚泥を予め可溶化処理することに特徴を有するものである。
【００２３】
請求項１４に記載された発明は、請求項１１から１３の何れか１つに記載された、有機性廃棄物の処理装置において、未処理汚泥は、汚泥前処理手段により前処理された後、消化タンクに投入され、その間は、消化タンクからの循環汚泥の引き抜きは停止されることに特徴を有するものである。
【００２４】
【発明の実施の形態】
次に、この発明の、有機性廃棄物の処理方法の一実施態様を、図面を参照しながら説明する。
【００２５】
図１は、この発明の、有機性廃棄物の処理方法の一実施態様を示すフロー図である。
【００２６】
図１において、１は、消化タンク、２は、熱交換器、３は、可溶化装置であり、上述した有機性廃棄物としての未処理汚泥は、以下のようにして処理される。
【００２７】
未処理汚泥は、３〜５％の固形物濃度に濃縮される。この濃縮汚泥は、３５℃程度に加熱された後、消化タンク１内に投入され、ここで２０〜３０日間、嫌気性状態で攪拌され、酸発酵菌やメタン発酵菌の力によって有機物が分解される。このようにして分解処理された汚泥は、消化タンク１内から引き抜かれ、脱水処理後、例えば、焼却処理される。
【００２８】
消化タンク１内から引き抜かれた汚泥の一部、すなわち、循環汚泥は、熱交換器２を介して４０から４５℃に加温された後、可溶化処置３に送られ、ここで、可溶化処理された後、再度、消化タンク１内に投入される。この循環汚泥の加温の熱源としては、消化タンク１内において嫌気性消化の副産物として生成するメタンガスを主成分とする消化ガスが有効利用される。
【００２９】
加温された循環汚泥は、消化タンクの加温に利用されると共に、可溶化処理後、消化タンク１内に投入されることによって、汚泥の消化時間が短縮される。
【００３０】
可溶化装置３としては、ノズル型キャビテーション処理や超音波照射等のキャビテーション処理によるもの以外に、摩砕処理、湿式ミル、衝撃波照射処理、加熱処理、界面活性剤、酸、アルカリ等による薬品処理、凍結融解処理、電気分解処理、加圧処理、減圧処理、可溶性能力を有する微生物による処理、亜臨界処理、あるいは、これらの組み合わせたもの等が使用可能である。
【００３１】
図２に示すように、消化タンク１からの循環汚泥を昇圧ポンプ５によって、例えば、約２００ｋＰａに加圧して可溶化装置３に送り込めば、循環汚泥の可溶化効果がさらに向上する。
【００３２】
上述した例は、熱交換器２と可溶化装置３とを直列に配置したものであるが、図３に示すように、熱交換器２と可溶化装置３と並列に配置して、循環汚泥の一部を熱交換器２により加温し、残りの循環汚泥を可溶化装置３により可溶化処理し、それぞれを消化タンク１に戻しても良い。
【００３３】
図４に示すように、可溶化装置３の前段にｐＨ調整用の汚泥前処理手段４を設けても良い。すなわち、可溶化装置３による可溶化処理として、酸を使用する場合、あるいは、酸と超音波照射、機械的破砕、キャビテーション処理、衝撃波照射処理等との組み合わせを使用する場合、消化タンク１内の汚泥のｐＨが高すぎると、ＭＡＰ（リン酸マグネシウムアンモニウム）が生成され、これがスケールとなって配管に付着して操業に支障を来たす恐れがある。
【００３４】
そこで、ＭＡＰの生成を抑制するために、消化タンク１内の汚泥のｐＨを６．７から７．３程度に維持する必要がある。このために、ＭＡＰの生成を抑制するためのｐＨ調整作用を有する汚泥前処理手段４を可溶化装置３の前段に設ける。これによって、可溶性の向上効果とＭＡＰの生成の抑制効果の両方を満足することができる。ｐＨ調整用の汚泥前処理手段４は、熱交換器２の前段に設けても良い。
【００３５】
汚泥前処理手段４を別の可溶化装置としても良い。すなわち、上記可溶化装置３は、有機物の細胞膜を破壊して、有機物の発酵による分解を促進させる作用を有するが、有機物の細胞が大きなフロックを形成していると、細胞膜が破壊されにくい。そこで、メインの可溶化装置３により可溶化処理する以前に、別の可溶化装置により、予め、フロック破壊（微細化）を行っても良い。
【００３６】
別の可溶化装置としては、ノズル型キャビテーション処理や超音波照射等のキャビテーション処理によるもの以外に、摩砕処理、湿式ミル、衝撃波照射処理、加熱処理、界面活性剤、酸、アルカリ等による薬品処理、凍結融解処理、電気分解処理、加圧処理、減圧処理、可溶性能力を有する微生物による処理、亜臨界処理、あるいは、これらの組み合わせたもの等が使用可能である。
【００３７】
図５に示すように、熱交換器２と可溶化装置３と並列に配置した場合であっても、汚泥前処理手段４を可溶化装置３の前段に設ければ、上述と同様な効果が得られる。
【００３８】
図６に示すように、未処理汚泥を消化タンク１に直接投入する前に、汚泥前処理手段４により上述した前処理を行って有機物の細胞のフロックを破壊し、この後、消化タンク１に投入すれば、消化タンク１内での有機物の発酵速度が増大する。この結果、消化ガスの発生量が増大すると共に、引き抜き汚泥量も減少する。未処理汚泥を汚泥前処理手段４を介して消化タンク１に投入している間は、消化タンク１からの循環汚泥の引き抜きは停止する。
【００３９】
消化タンク１に投入する未処理汚泥に、生ゴミ（食品残渣も含む）を混ぜれば、生ゴミは、汚泥に比べて多くの有機物を含んでいるので、分解率が高くなり、その分、ガス発生量が増大する。生ゴミを混ぜる場合、図７に示すように、生ゴミを破砕機６により破砕した後、未処理汚泥と混ぜても良い。また、生ゴミを何れの場合も生ゴミを破砕すればより可溶化効果および分解効率が向上する。
【００４０】
消化タンク１内で生成されるメタンガスを主成分とする消化ガスを利用して、マイクロガスタービンあるいはガスエンジンを作動させて発電し、これにより得られる電力を上述した各可溶化処理のエネルギー源とすることも可能である。
【００４１】
【実施例】
次に、この発明を実施例によりさらに説明する。
【００４２】
下記条件および表１に示す条件下で、前述した従来技術およびこの発明の実施例１から６の処理方法に従って汚泥を処理し、ＴＳ（残渣量）、ＶＴＳ（水分蒸発後の残渣量）、メタンガス発生量および懸濁態を調べた。
【００４３】
なお、従来処理方法は、図８に示す処理方法であり、実施例１は、図１に示す処理方法において、可溶化処理に超音波照射を使用した処理方法であり、実施例２は、図２に示す処理方法において、可溶化処理に超音波照射を使用し、循環汚泥を２００ｋＰａで加圧した処理方法であり、実施例３は、図５に示す処理方法において、前処理にＮａＯＨを添加し、可溶化処理に超音波照射を使用した処理方法であり、実施例４は、図５に示す処理方法において、前処理にＮａＯＨを添加し且つノズル型キャビテーション処理を使用し、可溶化処理に超音波照射を使用した方法であり、実施例５は、図５に示す処理方法において、前処理にＨ２ＳＯ４を添加し、可溶化処理に超音波照射を使用した処理方法であり、実施例６は、図７に示す処理方法において、未処理汚泥に摩砕処理した生ゴミを混ぜて消化タンクに投入した処理方法である。
【００４４】
処理条件
汚泥投入量：０．２５（Ｌ／日）
発酵温度：３５℃
ＳＲＴ（消化タンク容量／１日当たり投入量）：２０日
運転方法：１回／日入れ替えの半連続方式
消化タンク容積：５Ｌ
【００４５】
【表１】

Figure 2004290866
【００４６】
表１から明らかなように、この発明の実施例１から６は、何れも、従来技術に比べて、残渣発生量が減少し、しかも、メタンガスの発生量が増大したことが分かった。さらに、同じ運転時間でメタンガスの発生量が多いことから有機物の分解速度が速いことが分かった。また、実施例３と実施例５とから、前処理により汚泥のｐＨを下げれば、ＭＡＰの生成量を低減できることが分かった。
【００４７】
【発明の効果】
以上説明したように、この発明によれば、循環汚泥の一部を直接、可溶化装置により可溶化処理した後、消化タンク内に戻すことによって、汚泥の分解速度を速くすることができ、しかも、残渣発生量を少なくすることができ、さらに、消化ガス回収量を多くすることができる等、種々の有用な効果がもたらされる。
【図面の簡単な説明】
【図１】この発明の、有機性廃棄物の処理方法の一実施態様を示すフロー図である。
【図２】熱交換器と可溶化装置とを直列配置した、この発明の、有機性廃棄物の処理方法を示すフロー図である。
【図３】熱交換器と可溶化装置とを並列配置した、この発明の、有機性廃棄物の処理方法を示すフロー図である。
【図４】熱交換器と直列配置した可溶化装置の前段に汚泥前処理手段を設けた、この発明の、有機性廃棄物の処理方法を示すフロー図である。
【図５】熱交換器と並列配置した可溶化装置の前段に汚泥前処理手段を設けた、この発明の、有機性廃棄物の処理方法を示すフロー図である。
【図６】未処理汚泥を汚泥前処理手段を介して消化タンクに投入する、この発明の、有機性廃棄物の処理方法を示すフロー図である。
【図７】生ゴミを未処理汚泥に混ぜて消化タンクに投入する、この発明の、有機性廃棄物の処理方法を示すフロー図である。
【図８】従来処理方法を示すフロー図である。
【符号の説明】
１：消化タンク
２：熱交換器
３：可溶化装置
４：汚泥前処理手段
５：昇圧ポンプ
６：破砕機[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for treating organic waste, and more particularly, to a method and an apparatus for treating organic waste, which have a high sludge decomposition rate, a small amount of residue generated, and a large amount of digested gas recovered. Things.
[0002]
[Prior art]
Highly concentrated organic wastewater such as night soil, septic tank sludge, food factory wastewater, organic sludge from biological treatment process, food waste, livestock manure, garbage, etc. There is a method for treating organic waste using anaerobic digestion, which stabilizes, reduces the volume, and recovers energy as digestive gas.
[0003]
This method of treating organic waste will be described with reference to the drawings.
[0004]
FIG. 8 is a flowchart showing a conventional method for treating organic waste.
[0005]
In FIG. 8, 1 is a digestion tank, 2 is a heat exchanger, 3 is a solubilizer, and the above-mentioned untreated sludge as organic waste is treated as follows.
[0006]
The untreated sludge is concentrated to a solids concentration of 3-5%. This concentrated sludge is heated to about 35 ° C. and then charged into the digestion tank 1, where it is stirred in an anaerobic state, and organic matter is decomposed by the power of acid fermentation bacteria and methane fermentation bacteria. The sludge decomposed in this way is pulled out of the digestion tank 1 and, after dehydration, is subjected to, for example, incineration.
[0007]
Part of the sludge withdrawn from the digestion tank 1 is heated to 40 to 45 ° C. via the heat exchanger 2 and then re-entered into the digestion tank 1 to be used for heating the digestion tank. Is done. As a heat source for heating the sludge, a digestion gas mainly composed of methane gas generated as a by-product of anaerobic digestion in the digestion tank 1 is effectively used.
[0008]
[Problems to be solved by the invention]
However, the above-described prior art has the following problems.
(1) In the digestion tank 1, organic substances are decomposed on average by about 1/2 in 20 to 30 days, but the decomposition time is too long.
(2) As described in (1), since the decomposition rate of the organic matter is low, the amount of generated residue is large, and it takes time and effort to treat the sludge thereafter.
(3) As described in (1), since the decomposition rate of organic matter is low, the amount of digestible gas that can be recovered is small.
[0009]
Accordingly, an object of the present invention is to provide an organic waste treatment method capable of increasing the rate of decomposition of organic matter in a digestion tank, reducing the amount of generated sludge, and increasing the amount of digested gas recovered. It is in.
[0010]
[Means for Solving the Problems]
The invention described in claim 1 stirs untreated sludge in an anaerobic state in a digestion tank, decomposes organic matter by fermentation, obtains digestion gas by decomposition, and removes sludge extracted from the digestion tank. A part is heated via a heat exchanger, and the heated circulated sludge is returned to the digestion tank.In the method for treating organic waste, a solubilizing device is provided at a subsequent stage of the heat exchanger, The circulating sludge heated by the heat exchanger is solubilized.
[0011]
The invention described in claim 2 is that an untreated sludge is stirred in an anaerobic state in a digestion tank, fermented to decompose organic matter, and a digestion gas is obtained by decomposition, and sludge extracted from the digestion tank. In a method for treating organic waste, a part of which is heated through a heat exchanger and the heated circulating sludge is returned into the digestion tank, a part of the circulating sludge is solubilized by a solubilizing device. After that, it is characterized in that it is returned to the digestion tank.
[0012]
According to a third aspect of the present invention, in the method for treating organic waste according to the first or second aspect, sludge pretreatment means is provided in a preceding stage of the solubilizer to pretreat circulated sludge. It is characterized by the following.
[0013]
According to a fourth aspect of the present invention, there is provided the method for treating organic waste according to the third aspect, wherein the sludge pretreatment means adjusts the pH of the untreated sludge.
[0014]
According to a fifth aspect of the present invention, in the method for treating an organic waste according to the third aspect, the sludge pretreatment means preliminarily solubilizes the circulated sludge heated by the heat exchanger. It is characterized by the following.
[0015]
According to a sixth aspect of the present invention, in the method for treating organic waste according to any one of the third to fifth aspects, after the untreated sludge is pretreated by the sludge pretreatment means, the sludge is supplied to the digestion tank. It is characterized by stopping the withdrawal of circulating sludge from the digestion tank during the charging.
[0016]
According to a seventh aspect of the present invention, in the method for treating organic waste according to any one of the first to sixth aspects, raw garbage is mixed with untreated sludge and charged into a digestion tank. It has features.
[0017]
The invention described in claim 8 is characterized in that, in the method for treating organic waste described in claim 7, a means for solubilizing garbage is provided.
[0018]
The invention described in claim 9 is a digestion tank that stirs untreated sludge in an anaerobic state and ferments to decompose organic matter, and a heat exchanger that heats a part of the sludge extracted from the digestion tank. The circulating sludge heated by the heat exchanger is returned to the digestion tank, and in an organic waste treatment apparatus, the heat treatment is performed by the heat exchanger at a subsequent stage of the heat exchanger. Further, a solubilizing device for solubilizing the circulating sludge is provided.
[0019]
The invention described in claim 10 is a digestion tank for stirring and fermenting untreated sludge in an anaerobic state to decompose organic matter, and a heat exchanger for heating a part of the sludge extracted from the digestion tank. Wherein the circulating sludge heated by the heat exchanger is returned into the digestion tank, and in the organic waste treatment device, a part of the circulating sludge is directly solubilized. Is provided, and the circulated sludge that has been solubilized is returned to the digestion tank.
[0020]
According to an eleventh aspect of the present invention, in the organic waste treatment apparatus according to the ninth or tenth aspect, sludge pretreatment means is provided at a stage preceding the solubilization apparatus, and the circulated sludge is provided by the sludge pretreatment means. Is pretreated and sent to a solubilizer.
[0021]
According to a twelfth aspect of the present invention, there is provided the organic waste treatment apparatus according to the eleventh aspect, wherein the sludge pretreatment means adjusts the pH of the untreated sludge.
[0022]
According to a thirteenth aspect of the present invention, in the organic waste treatment apparatus according to the eleventh aspect, the sludge pretreatment means preliminarily solubilizes the circulated sludge heated by the heat exchanger. It is characterized by the following.
[0023]
According to a fourteenth aspect of the present invention, in the organic waste treatment device according to any one of the eleventh to thirteenth aspects, the untreated sludge is pretreated by a sludge pretreatment means, It is characterized by the fact that it is put into the digestion tank, during which the withdrawal of the circulating sludge from the digestion tank is stopped.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the method for treating organic waste according to the present invention will be described with reference to the drawings.
[0025]
FIG. 1 is a flowchart showing one embodiment of the method for treating organic waste according to the present invention.
[0026]
In FIG. 1, 1 is a digestion tank, 2 is a heat exchanger, 3 is a solubilizer, and the above-mentioned untreated sludge as organic waste is treated as follows.
[0027]
The untreated sludge is concentrated to a solids concentration of 3-5%. This concentrated sludge is heated to about 35 ° C. and then put into the digestion tank 1 where it is stirred for 20 to 30 days in an anaerobic state, and organic matter is decomposed by the power of acid fermentation bacteria and methane fermentation bacteria. You. The sludge decomposed in this way is pulled out of the digestion tank 1 and, after dehydration, is subjected to, for example, incineration.
[0028]
A part of the sludge withdrawn from the digestion tank 1, that is, the circulating sludge, is heated to 40 to 45 ° C. via the heat exchanger 2 and sent to the solubilization treatment 3 where the solubilization is performed. After the treatment, it is put into the digestion tank 1 again. As a heat source for heating the circulating sludge, a digestion gas mainly composed of methane gas generated as a by-product of anaerobic digestion in the digestion tank 1 is effectively used.
[0029]
The heated circulating sludge is used for heating the digestion tank, and is put into the digestion tank 1 after the solubilization treatment, whereby the digestion time of the sludge is reduced.
[0030]
Examples of the solubilizing device 3 include, in addition to those by nozzle-type cavitation treatment or cavitation treatment such as ultrasonic irradiation, grinding treatment, wet mill, shock wave irradiation treatment, heat treatment, chemical treatment with a surfactant, acid, alkali, or the like, Freezing and thawing treatment, electrolysis treatment, pressure treatment, decompression treatment, treatment with a microorganism having a soluble ability, subcritical treatment, or a combination thereof can be used.
[0031]
As shown in FIG. 2, if the circulating sludge from the digestion tank 1 is pressurized to, for example, about 200 kPa by the pressurizing pump 5 and sent to the solubilizer 3, the solubilizing effect of the circulating sludge is further improved.
[0032]
In the above-described example, the heat exchanger 2 and the solubilizing device 3 are arranged in series, but as shown in FIG. May be heated by the heat exchanger 2, the remaining circulating sludge is solubilized by the solubilizer 3, and each may be returned to the digestion tank 1.
[0033]
As shown in FIG. 4, a sludge pretreatment means 4 for pH adjustment may be provided in a stage preceding the solubilization device 3. That is, when an acid is used as the solubilization treatment by the solubilizer 3 or when a combination of an acid and ultrasonic irradiation, mechanical crushing, cavitation treatment, or shock wave irradiation treatment is used, the digestion tank 1 If the pH of the sludge is too high, MAP (magnesium ammonium phosphate) is generated, which may act as a scale and adhere to the piping, which may hinder the operation.
[0034]
Therefore, in order to suppress the generation of MAP, it is necessary to maintain the pH of the sludge in the digestion tank 1 at about 6.7 to 7.3. For this purpose, a sludge pretreatment means 4 having a pH adjusting action for suppressing the generation of MAP is provided in a stage preceding the solubilization device 3. Thereby, both the effect of improving the solubility and the effect of suppressing the generation of MAP can be satisfied. The sludge pretreatment means 4 for pH adjustment may be provided at a stage before the heat exchanger 2.
[0035]
The sludge pretreatment means 4 may be another solubilizing device. In other words, the solubilizing device 3 has an action of destroying the cell membrane of the organic substance and promoting the decomposition of the organic substance by fermentation. However, when the organic substance cells form large flocs, the cell membrane is hardly destroyed. Therefore, before the solubilization process is performed by the main solubilizer 3, floc destruction (miniaturization) may be performed in advance by another solubilizer.
[0036]
Other solubilizers include cavitation treatment such as nozzle-type cavitation treatment and ultrasonic irradiation, as well as grinding treatment, wet mill, shock wave irradiation treatment, heat treatment, chemical treatment with surfactant, acid, alkali, etc. Freeze-thaw treatment, electrolysis treatment, pressure treatment, decompression treatment, treatment with a microorganism having a soluble ability, subcritical treatment, or a combination thereof can be used.
[0037]
As shown in FIG. 5, even when the heat exchanger 2 and the solubilizing device 3 are arranged in parallel, if the sludge pretreatment means 4 is provided in front of the solubilizing device 3, the same effect as described above can be obtained. can get.
[0038]
As shown in FIG. 6, before directly charging the untreated sludge into the digestion tank 1, the pretreatment described above is performed by the sludge pretreatment means 4 to destroy the flocs of the organic matter cells. If it is added, the fermentation rate of organic matter in the digestion tank 1 increases. As a result, the amount of digested gas generated increases and the amount of drawn sludge decreases. While the untreated sludge is being fed into the digestion tank 1 via the sludge pretreatment means 4, the withdrawal of the circulating sludge from the digestion tank 1 is stopped.
[0039]
If raw garbage (including food residues) is mixed with the untreated sludge to be put into the digestion tank 1, the raw garbage contains more organic substances than the sludge, so the decomposition rate increases, and the gas is accordingly increased. The amount of generation increases. When mixing the garbage, as shown in FIG. 7, the garbage may be crushed by the crusher 6 and then mixed with the untreated sludge. Further, in any case, if the garbage is crushed, the solubilizing effect and the decomposition efficiency are further improved.
[0040]
Utilizing the digestion gas mainly composed of methane gas generated in the digestion tank 1, a micro gas turbine or a gas engine is operated to generate electric power, and the obtained electric power is used as an energy source for each of the solubilization processes described above. It is also possible.
[0041]
【Example】
Next, the present invention will be further described with reference to examples.
[0042]
Under the following conditions and the conditions shown in Table 1, sludge is treated in accordance with the above-described prior art and the treatment methods of Examples 1 to 6 of the present invention, and TS (residual amount), VTS (residual amount after water evaporation), methane gas The generation and suspension were examined.
[0043]
Note that the conventional processing method is the processing method shown in FIG. 8, Example 1 is a processing method using ultrasonic irradiation for the solubilization in the processing method shown in FIG. 1, and Example 2 is a processing method shown in FIG. In the treatment method shown in FIG. 2, ultrasonic irradiation was used for the solubilization treatment, and the circulating sludge was pressurized at 200 kPa. In Example 3, NaOH was added to the pretreatment in the treatment method shown in FIG. Example 4 is a processing method using ultrasonic irradiation for the solubilization treatment. In Example 4, in the processing method shown in FIG. 5, NaOH was added to the pretreatment and the nozzle type cavitation treatment was used. Example 5 is a method using ultrasonic irradiation, and Example 5 is a processing method in which H 2 SO 4 is added to the pretreatment and ultrasonic irradiation is used for solubilization in the processing method shown in FIG. Example 6 is a processing method shown in FIG. In a processing method which supplied the digesting tank mix garbage trituration process to untreated sludge.
[0044]
Treatment conditions Sludge input: 0.25 (L / day)
Fermentation temperature: 35 ° C
SRT (digestion tank capacity / amount input per day): 20 days Operating method: semi-continuous method with once / day replacement Digestion tank volume: 5 L
[0045]
[Table 1]
Figure 2004290866
[0046]
As is clear from Table 1, it was found that all of Examples 1 to 6 of the present invention reduced the amount of generated residues and increased the amount of generated methane gas as compared with the conventional technology. Furthermore, it was found that the decomposition rate of organic matter was high because the amount of methane gas generated was large during the same operation time. Further, from Examples 3 and 5, it was found that if the pH of the sludge was lowered by the pretreatment, the amount of generated MAP could be reduced.
[0047]
【The invention's effect】
As described above, according to the present invention, a part of the circulating sludge is directly solubilized by the solubilizer, and then returned to the digestion tank, whereby the sludge decomposition rate can be increased, and In addition, various useful effects can be obtained, such as a reduction in the amount of generated residues and an increase in the amount of digested gas recovered.
[Brief description of the drawings]
FIG. 1 is a flowchart showing one embodiment of a method for treating organic waste according to the present invention.
FIG. 2 is a flow chart showing a method for treating organic waste according to the present invention in which a heat exchanger and a solubilizer are arranged in series.
FIG. 3 is a flowchart showing a method for treating organic waste according to the present invention in which a heat exchanger and a solubilizer are arranged in parallel.
FIG. 4 is a flow chart showing a method for treating organic waste according to the present invention, in which a sludge pretreatment means is provided in a preceding stage of a solubilizer arranged in series with a heat exchanger.
FIG. 5 is a flow chart showing a method for treating organic waste according to the present invention, in which a sludge pretreatment means is provided in a preceding stage of a solubilizer arranged in parallel with a heat exchanger.
FIG. 6 is a flowchart showing an organic waste treatment method of the present invention in which untreated sludge is put into a digestion tank via sludge pretreatment means.
FIG. 7 is a flow chart showing a method for treating organic waste according to the present invention, in which raw garbage is mixed with untreated sludge and put into a digestion tank.
FIG. 8 is a flowchart showing a conventional processing method.
[Explanation of symbols]
1: digestion tank 2: heat exchanger 3: solubilizer 4: sludge pretreatment means 5: pressurizing pump 6: crusher

Claims (14)

消化タンク内において嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解し、分解により消化ガスを得ると共に、前記消化タンクから引き抜かれた汚泥の一部を熱交換器を介して加温し、この加温した循環汚泥を前記消化タンク内に戻す、有機性廃棄物の処理方法において、
前記熱交換器の後段に可溶化装置を設けて、前記熱交換器により加温された前記循環汚泥を可溶化処理することを特徴とする、有機性廃棄物の処理方法。In the digestion tank, the untreated sludge is stirred in an anaerobic state, fermented to decompose organic matter, and digestion gas is obtained by decomposition, and a part of the sludge extracted from the digestion tank is added through a heat exchanger. Warming and returning the heated circulating sludge to the digestion tank, the method for treating organic waste,
A method for treating organic waste, comprising: providing a solubilization device at a stage subsequent to the heat exchanger, and solubilizing the circulated sludge heated by the heat exchanger. 消化タンク内において嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解し、分解により消化ガスを得ると共に、前記消化タンクから引き抜かれた汚泥の一部を熱交換器を介して加温し、この加温した循環汚泥を前記消化タンク内に戻す、有機性廃棄物の処理方法において、
前記循環汚泥の一部を直接、可溶化装置により可溶化処理した後、前記消化タンク内に戻すことを特徴とする、有機性廃棄物の処理方法。In the digestion tank, the untreated sludge is stirred in an anaerobic state, fermented to decompose organic matter, and digestion gas is obtained by decomposition, and a part of the sludge extracted from the digestion tank is added through a heat exchanger. Warming and returning the heated circulating sludge to the digestion tank, the method for treating organic waste,
A method for treating organic waste, wherein a part of the circulating sludge is directly solubilized by a solubilizer and then returned to the digestion tank. 前記可溶化装置の前段に汚泥前処理手段を設けて、前記循環汚泥を前処理した後、前記可溶化装置に送ることを特徴とする、請求項１または２に記載された、有機性廃棄物の処理方法。The organic waste according to claim 1 or 2, wherein a sludge pretreatment means is provided in a preceding stage of the solubilizer, and the pretreated sludge is sent to the solubilizer. Processing method. 前記汚泥前処理手段は、前記未処理汚泥のｐＨを調整することを特徴とする、請求項３に記載された、有機性廃棄物の処理方法。The method for treating organic waste according to claim 3, wherein the sludge pretreatment means adjusts the pH of the untreated sludge. 前記汚泥前処理手段は、前記熱交換器により加温された循環汚泥を予め可溶化処理することを特徴とする、請求項３に記載された、有機性廃棄物の処理方法。The method for treating organic waste according to claim 3, wherein the sludge pretreatment means solubilizes the circulated sludge heated by the heat exchanger in advance. 前記未処理汚泥を前記汚泥前処理手段により前処理した後、前記消化タンクに投入し、その間は、前記消化タンクからの前記循環汚泥の引き抜きを停止することを特徴とする、請求項３から５の何れか１つに記載された、有機性廃棄物の処理方法。The pretreatment of the untreated sludge by the sludge pretreatment means, and then, the sludge is put into the digestion tank, during which the removal of the circulating sludge from the digestion tank is stopped. The method for treating organic waste described in any one of the above. 前記未処理汚泥に生ゴミを混ぜて前記消化タンクに投入することを特徴とする、請求項１から６の何れか１つに記載された、有機性廃棄物の処理方法。The method for treating organic waste according to any one of claims 1 to 6, wherein garbage is mixed with the untreated sludge and the mixture is charged into the digestion tank. 前記生ゴミの可溶化装置を設けることを特徴とする、請求項７に記載された、有機性廃棄物の処理方法。The method for treating organic waste according to claim 7, wherein the garbage solubilization device is provided. 嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解する消化タンクと、前記消化タンクから引き抜かれた汚泥の一部を加温する熱交換器とを備え、前記熱交換器により加温された循環汚泥は、前記消化タンク内に戻される、有機性廃棄物の処理装置において、
前記熱交換器の後段に、前記熱交換器により加温された前記循環汚泥を可溶化処理する可溶化装置が設けられていることを特徴とする、有機性廃棄物の処理装置。An unanalyzed sludge is stirred and fermented to decompose organic matter by fermentation, and a heat exchanger for heating a part of the sludge extracted from the digestion tank is provided. The warmed circulating sludge is returned to the digestion tank, in an organic waste treatment device,
An organic waste treatment apparatus, wherein a solubilizer for solubilizing the circulated sludge heated by the heat exchanger is provided at a stage subsequent to the heat exchanger. 嫌気性状態で未処理汚泥を攪拌し、発酵させて有機物を分解する消化タンクと、前記消化タンクから引き抜かれた汚泥の一部を加温する熱交換器とを備え、前記熱交換器により加温された循環汚泥は、前記消化タンク内に戻される、有機性廃棄物の処理装置において、
前記循環汚泥の一部を直接、可溶化処理する可溶化装置が設けられ、可溶化処理された循環汚泥は、前記消化タンク内に戻されることを特徴とする、有機性廃棄物の処理装置。An unanalyzed sludge is stirred and fermented to decompose organic matter by fermentation, and a heat exchanger for heating a part of the sludge extracted from the digestion tank is provided. The heated circulating sludge is returned to the digestion tank, and in an organic waste treatment device,
An apparatus for treating organic waste, comprising: a solubilizing device for directly solubilizing a part of the circulating sludge, and the circulating sludge subjected to the solubilizing treatment is returned to the digestion tank. 前記可溶化装置の前段に汚泥前処理手段が設けられ、前記汚泥前処理手段により前記循環汚泥が前処理された後、前記可溶化装置に送られることを特徴とする、請求項９または１０に記載された、有機性廃棄物の処理装置。The sludge pretreatment means is provided in a preceding stage of the solubilization device, and after the circulated sludge is pretreated by the sludge pretreatment device, the sludge is sent to the solubilization device. Organic waste treatment device as described. 前記汚泥前処理手段は、前記未処理汚泥のｐＨを調整することを特徴とする、請求項１１に記載された、有機性廃棄物の処理装置。12. The organic waste treatment apparatus according to claim 11, wherein the sludge pretreatment unit adjusts the pH of the untreated sludge. 前記汚泥前処理手段は、前記熱交換器により加温された循環汚泥を予め可溶化処理することを特徴とする、請求項１１に記載された、有機性廃棄物の処理装置。12. The organic waste treatment apparatus according to claim 11, wherein the sludge pre-treatment unit preliminarily solubilizes the circulated sludge heated by the heat exchanger. 前記未処理汚泥は、前記汚泥前処理手段により前処理された後、前記消化タンクに投入され、その間は、前記消化タンクからの前記循環汚泥の引き抜きは停止されることを特徴とする、請求項１１から１３の何れか１つに記載された、有機性廃棄物の処理装置。The untreated sludge, after being pre-treated by the sludge pre-processing means, is charged into the digestion tank, during which the withdrawal of the circulating sludge from the digestion tank is stopped. 14. The organic waste treatment apparatus according to any one of 11 to 13.
JP2003088186A 2003-03-27 2003-03-27 Organic waste treatment method and apparatus Expired - Lifetime JP4250994B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003088186A JP4250994B2 (en) 2003-03-27 2003-03-27 Organic waste treatment method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003088186A JP4250994B2 (en) 2003-03-27 2003-03-27 Organic waste treatment method and apparatus

Publications (2)

Publication Number Publication Date
JP2004290866A true JP2004290866A (en) 2004-10-21
JP4250994B2 JP4250994B2 (en) 2009-04-08

Family

ID=33402384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003088186A Expired - Lifetime JP4250994B2 (en) 2003-03-27 2003-03-27 Organic waste treatment method and apparatus

Country Status (1)

Country Link
JP (1) JP4250994B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122799A (en) * 2004-10-28 2006-05-18 Ebara Corp Method and apparatus for treating organic waste
JP2006167522A (en) * 2004-12-14 2006-06-29 Japan Sewage Works Agency Anaerobic digestion control method for organic waste
JP2006212581A (en) * 2005-02-04 2006-08-17 Mitsubishi Heavy Ind Ltd Method for treating organic waste material
JP2007117996A (en) * 2005-09-28 2007-05-17 Ebara Corp Method and device of treating waste containing organic solid contaminated substance
JP2008229590A (en) * 2007-03-23 2008-10-02 Fuji Electric Holdings Co Ltd Methane fermentation treatment apparatus and methane fermentation treatment method
JP5870343B1 (en) * 2015-07-21 2016-02-24 幸治 井戸 Methane fermentation method and methane fermentation system
JP5870342B1 (en) * 2015-07-21 2016-02-24 幸治 井戸 Methane fermentation method and methane fermentation system
KR20200040379A (en) * 2018-10-10 2020-04-20 조승윤 Bacteria freiendly homogenizing device and method for maximizing production of biogas

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101049069B1 (en) 2010-09-20 2011-07-15 우경건설 주식회사 Anaerobic digestion apparatus capable of minimizing outside shock load and the method thereof
JP6941988B2 (en) * 2017-07-04 2021-09-29 月島機械株式会社 Sewage sludge treatment equipment and sewage sludge treatment method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122799A (en) * 2004-10-28 2006-05-18 Ebara Corp Method and apparatus for treating organic waste
JP2006167522A (en) * 2004-12-14 2006-06-29 Japan Sewage Works Agency Anaerobic digestion control method for organic waste
JP2006212581A (en) * 2005-02-04 2006-08-17 Mitsubishi Heavy Ind Ltd Method for treating organic waste material
JP4667890B2 (en) * 2005-02-04 2011-04-13 三菱重工環境・化学エンジニアリング株式会社 Organic waste treatment methods
JP2007117996A (en) * 2005-09-28 2007-05-17 Ebara Corp Method and device of treating waste containing organic solid contaminated substance
JP2008229590A (en) * 2007-03-23 2008-10-02 Fuji Electric Holdings Co Ltd Methane fermentation treatment apparatus and methane fermentation treatment method
JP5870343B1 (en) * 2015-07-21 2016-02-24 幸治 井戸 Methane fermentation method and methane fermentation system
JP5870342B1 (en) * 2015-07-21 2016-02-24 幸治 井戸 Methane fermentation method and methane fermentation system
KR20200040379A (en) * 2018-10-10 2020-04-20 조승윤 Bacteria freiendly homogenizing device and method for maximizing production of biogas
KR102195592B1 (en) * 2018-10-10 2020-12-30 주식회사 에코플래닛 Bacteria freiendly homogenizing device and method for maximizing production of biogas

Also Published As

Publication number Publication date
JP4250994B2 (en) 2009-04-08

Similar Documents

Publication Publication Date Title
JP5230242B2 (en) Method and system for methane fermentation treatment of food waste
JP5687929B2 (en) Organic waste processing method and organic waste processing apparatus
JP2000005797A (en) Method for recovering metahne from organic solid
JP2004290866A (en) Treatment method and apparatus for organic waste
JP2003200198A (en) Method and apparatus for treating sludge
JP3662528B2 (en) Organic waste treatment method and apparatus
JP2001300486A (en) Apparatus and method for methane fermentation treatment of organic waste
JP2004050143A (en) Treating method of organic waste
JP3767736B2 (en) Organic waste treatment method and equipment
JP3738699B2 (en) Sludge treatment method and treatment apparatus, and sewage treatment method and treatment equipment using the same
JP4409928B2 (en) Organic waste treatment methods
JP5230243B2 (en) Method and system for methane fermentation treatment of organic waste
KR20160057242A (en) Apparatus for dry anaerobic digestion and method for dry anaerobic digestion
JP3977174B2 (en) Sludge treatment method and apparatus for reducing generation amount of excess sludge
JP2000246280A (en) Treatment apparatus of organic waste water
JP2017148777A (en) Method and device for methane fermentation
JP3775670B2 (en) Method and apparatus for treating cellulose-containing organic waste
JPH11290827A (en) Method for heating organic waste in fermentation tank
JP2018130656A (en) Waste treatment method and waste treatment system
JP4018952B2 (en) Jellyfish processing method
JP3871531B2 (en) Organic waste treatment method and apparatus
JP3813846B2 (en) Organic waste treatment method and apparatus
JP3853971B2 (en) Aerobic digestion method of excess sludge
JP2005095811A (en) Method and apparatus for treating organic waste
WO2023171006A1 (en) Organic matter treatment system and organic matter treatment method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050802

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070824

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080701

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080827

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20081224

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090106

R150 Certificate of patent or registration of utility model

Ref document number: 4250994

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120130

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120130

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130130

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130130

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140130

Year of fee payment: 5

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

EXPY Cancellation because of completion of term