JP3919455B2 - Advanced denitrification method for waste water - Google Patents
Advanced denitrification method for waste water Download PDFInfo
- Publication number
- JP3919455B2 JP3919455B2 JP2001078137A JP2001078137A JP3919455B2 JP 3919455 B2 JP3919455 B2 JP 3919455B2 JP 2001078137 A JP2001078137 A JP 2001078137A JP 2001078137 A JP2001078137 A JP 2001078137A JP 3919455 B2 JP3919455 B2 JP 3919455B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- denitrification
- biofilm filtration
- filtration device
- wastewater
- 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 - Fee Related
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Description
【０００１】
【発明の属する技術分野】
本発明は、有機性排水中に含まれる窒素を経済的に除去することができる排水の高度脱窒方法に関するものである。
【０００２】
【従来の技術】
有機性排水中に含まれる窒素を除去する実用的な方法としては、生物処理による脱窒法が一般的である。この生物処理による脱窒は、好気床による硝化工程と嫌気床による脱窒工程とからなるものである。このような脱窒プロセスでは、硝化液循環法、Ａ２Ｏ法ともに槽が脱窒槽−硝化槽の順で配置されている。
【０００３】
周知のように脱窒のためには有機物源が必要であるが、これらの方法では排水中に含まれる有機物を有機物源として有効利用することができ、ランニングコストを低減できる利点がある。しかし、窒素除去率が硝化液循環率により決まるため、実用上は窒素除去率をあまり高くすることはできなかった。すなわち、脱窒槽−硝化槽の単段式では窒素除去率は６０％、脱窒槽−硝化槽−脱窒槽−硝化槽の複段式でも窒素除去率は８０％程度であった。
【０００４】
また、槽を硝化槽−脱窒槽の順で配置することにより硝化液循環をなくし、窒素除去率を高める方法も知られている。しかしこの方法では、硝化槽にはアルカリを供給しなければならず、脱窒槽では有機物を供給しなければならないため、薬品コストがかかるという問題がある。
【０００５】
【発明が解決しようとする課題】
本発明は上記した従来の問題点を解決し、薬品の添加を不要とするか削減してランニングコストを抑制しつつ、優れた窒素除去率を達成することができる排水の高度脱窒方法を提供するためになされたものである。
【０００６】
【課題を解決するための手段】
上記の課題を解決するためになされた請求項１の発明は、活性汚泥を用いることなく生物固定化担体により排水の少なくとも硝化を行うプロセスにおける硝化槽の後段に嫌気性の生物膜ろ過装置を設置し、硝化槽処理水中に残存するＮＯｘを硝化槽処理水中のＳＳを有機物源として嫌気条件下で脱窒させることを特徴とするものである。
【０００７】
本発明においては、生物膜ろ過装置を嫌気床のみ、または嫌気床に好気床を付加したものとすることが好ましい。
【０００８】
本発明においては、硝化槽または最終沈殿池の後段に配置された生物膜ろ過装置での保持時間を十分に取ることによりＳＳを微生物分解させるとともに、生物膜ろ過装置においてＳＳ中の有機物を有効利用して排水中に残存するＮＯｘを脱窒させる。このため脱窒用の有機物源を薬品として添加する必要がなくなり、ランニングコストを抑制できるとともに、窒素除去率を高めることができる。
以下に本発明の好ましい実施形態を説明する。
【０００９】
【発明の実施の形態】
（請求項１の発明）
図１は請求項１の発明の実施形態を示す図であり、活性汚泥を用いない生物固定化担体による排水処理プロセスを示している。この実施形態では２段式の硝化・脱窒が行われており、１は最初沈殿池、２は第１脱窒槽、３は第１硝化槽、４は第２脱窒槽、５は第２硝化槽である。これらの各槽中にはＰＶＡ担体等の流動担体や固定担体を投入できる。この第２硝化槽５の後段に、生物膜ろ過装置６を設置してある。
【００１０】
排水はまず最初沈殿池１に流入し、砂や木片などの異物を除去される。なお排水としては、下水、下水返流水、工場排水、ゴミ浸出水、屎尿、農業排水、畜産排水、養殖排水などの各種のものを挙げることができる。最初沈殿池１の越流水は、分配器７によって第１脱窒槽２と第２脱窒槽４とに分配される。このプロセスは槽を脱窒槽−硝化槽の順に配置したものであるから、排水中の有機物を脱窒に利用することができ薬品添加は不要であるが、第２硝化槽５から循環経路８によって硝化液循環を行わせるため、前記したように窒素除去率は８０％程度である。しかし本発明では次の生物膜ろ過装置６においてさらに窒素除去が進行する。
【００１１】
生物膜ろ過装置６には、担体に微生物を担持させた充填層９が形成されている。担体の材質は、スチレン系、エステル系、エチレン系などの高分子系材料や、活性炭、アンスラサイト、砂利、珪砂などの無機系材料であり、そのサイズは０．１〜２０ｍｍ程度が適当である。担体表面への微生物の付着を促進するために、表面に凹凸や孔を設けてもよく、スポンジ状としたり、吸着層を形成してもよい。その処理速度はＬＶ＝２０〜４００ｍ／ｄａｙとし、通水方向は上下いずれでもよい。生物膜ろ過装置６は嫌気床としておく。
【００１２】
第２硝化槽５の処理水は、この生物膜ろ過装置６に流入する。排水中のＳＳの一部は最初沈殿池１において除去されているが、最初沈殿池１の越流水に含まれるＳＳはその後の活性汚泥のない脱窒槽や硝化槽では生物分解をあまり受けることなく生物膜ろ過装置６に流入する。このため、比較的微生物分解のし易い有機物を多く含み、生物膜ろ過装置６ではこのＳＳを有機物源として硝化槽処理水中に残存するＮＯｘを嫌気条件下で脱窒することができる。その結果、生物膜ろ過装置６においては外部からの有機物を必要とせずに内生脱窒を行わせ、ＳＳ除去率とともに窒素除去率を高めることができる。
【００１３】
なお、脱窒を行わせるために生物膜ろ過装置６は嫌気床としておく必要があるが、好気床を付加することもできる。この好気床はＳＳの微生物分解によって生じたアンモニアを硝化させる効果がある。また生物膜ろ過装置６を嫌気床とした場合にはＤＯ（溶存酸素）が不足した処理水が放水されるおそれがあるが、好気床を付加することにより処理水中のＤＯを増加させることができる。更に熱源が得られる場合には生物膜ろ過装置６を加温することもできる。
【００１４】
【００１５】
【００１６】
【００１７】
【実施例】
以下に本発明の実施例を示す。
図１に示した装置を用いて、有機性排水の処理テストを行った。各槽の容量は第１脱窒槽が０．３ｍ３、第１硝化槽０．３５ｍ３、第２脱窒槽０．５ｍ３、第２硝化槽０．３５ｍ３であり、各槽に１０容量％の担体を投入した。処理水量は６ｍ３／ｄａｙ（処理時間：６時間）であり、原水分配率は前段５０％、後段５０％である。また硝化液循環率は原水の１５０％である。その結果、第２硝化槽出口で８０％の窒素除去率が達成された。
【００１８】
さらに第２硝化槽の後段に嫌気床のみの生物膜ろ過装置を設置して、外部から有機物源を供給することなく硝化槽処理水中に残存するＮＯｘ及びＳＳの除去を行わせた。生物膜ろ過装置の容量は０．１ｍ３であり、担体として３ｍｍ球の発泡スチロールを１ｍの高さに充填した。ＬＶは１００ｍ／ｄａｙ、水温は２０〜３０℃とした。この生物膜ろ過装置で処理された処理水と、原水（第２硝化槽出口水）との性状を、表１に示した。数値は全て平均値であり、単位はｍｇ／Ｌである。
【００１９】
【表１】
表１の実験データに示されるように、トータル窒素及びＳＳ性Ｎは明確に減少し、窒素除去率は８８％に達した。またＮＨ４−ＮとＮＯ２−Ｎとが増加したことは、生物膜ろ過装置においてＳＳ性Ｎが分解されたことを意味するものである。
【００２１】
【発明の効果】
以上に説明したように、本発明の排水の高度脱窒方法によれば、排水処理プロセス後段に生物膜ろ過装置を設置し、処理水中に残存するＮＯｘを処理水中のＳＳを有機物源として脱窒させるようにしたので、生物膜ろ過槽にて脱窒のための薬品の添加を不要または削減してランニングコストを抑制しつつ、薬品を添加していた場合と同様の優れた窒素除去率を達成することができる利点がある。
【図面の簡単な説明】
【図１】請求項１の発明の実施形態を示すブロック図である。
【符号の説明】
１ 最初沈殿池、２ 第１脱窒槽、３ 第１硝化槽、４ 第２脱窒槽、５ 第２硝化槽、６ 生物膜ろ過装置、７ 分配器、８ 循環経路、１０ 曝気槽、１１ 最終沈殿池[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for advanced denitrification of wastewater that can economically remove nitrogen contained in organic wastewater.
[0002]
[Prior art]
As a practical method for removing nitrogen contained in organic wastewater, a denitrification method by biological treatment is generally used. This denitrification by biological treatment consists of a nitrification process using an aerobic bed and a denitrification process using an anaerobic bed. In such a denitrification process, the tanks are arranged in the order of the denitrification tank and the nitrification tank in both the nitrification solution circulation method and the A 2 O method.
[0003]
As is well known, an organic material source is necessary for denitrification. However, these methods have the advantage that the organic material contained in the waste water can be effectively used as the organic material source and the running cost can be reduced. However, since the nitrogen removal rate is determined by the nitrification liquid circulation rate, the nitrogen removal rate could not be made very high in practical use. That is, the nitrogen removal rate was 60% in the single-stage type of the denitrification tank-nitrification tank, and the nitrogen removal rate was about 80% even in the multi-stage type of the denitrification tank-nitrification tank-denitrification tank-nitrification tank.
[0004]
A method is also known in which the tank is disposed in the order of nitrification tank-denitrification tank to eliminate nitrification liquid circulation and increase the nitrogen removal rate. However, in this method, there is a problem that chemical costs are required because an alkali must be supplied to the nitrification tank and an organic substance must be supplied to the denitrification tank.
[0005]
[Problems to be solved by the invention]
The present invention solves the above-mentioned conventional problems and provides an advanced denitrification method for wastewater that can achieve an excellent nitrogen removal rate while suppressing running costs by eliminating or reducing the addition of chemicals. It was made to do.
[0006]
[Means for Solving the Problems]
The invention of claim 1 made to solve the above problem is to install an anaerobic biofilm filtration device in the latter stage of the nitrification tank in the process of at least nitrifying the wastewater with the bioimmobilized carrier without using activated sludge. The NO x remaining in the nitrification tank treated water is denitrified under anaerobic conditions using SS in the nitrification tank treated water as an organic substance source.
[0007]
In the present invention, it is preferable that the biofilm filtration device has only an anaerobic bed or an anaerobic bed added to the anaerobic bed .
[0008]
In the present invention , SS is microbiologically decomposed by taking sufficient retention time in a biofilm filtration device disposed in the latter stage of the nitrification tank or final sedimentation basin, and organic matter in SS is effectively used in the biofilm filtration device. to denitrification of NO x remaining in the waste water to. For this reason, it is not necessary to add an organic substance source for denitrification as a chemical, the running cost can be suppressed, and the nitrogen removal rate can be increased.
Hereinafter, preferred embodiments of the present invention will be described.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
(Invention of Claim 1)
Figure 1 is a diagram showing an embodiment of the invention of claim 1, it shows a wastewater treatment process by the biological immobilization pellets without using activated sludge. In this embodiment, two-stage nitrification / denitrification is performed, where 1 is the first sedimentation tank, 2 is the first denitrification tank, 3 is the first nitrification tank, 4 is the second denitrification tank, and 5 is the second nitrification tank. It is a tank. In each of these tanks, a fluid carrier such as a PVA carrier or a fixed carrier can be charged. A biofilm filtration device 6 is installed downstream of the second nitrification tank 5.
[0010]
The wastewater first flows into the settling basin 1 to remove foreign matters such as sand and wood chips. Examples of the wastewater include various types of sewage, sewage return water, factory wastewater, waste leachate, human waste, agricultural wastewater, livestock wastewater, and aquaculture wastewater. The overflow water in the first settling tank 1 is distributed to the
[0011]
The biofilm filtration device 6 is formed with a packed bed 9 in which microorganisms are supported on a carrier. The material of the carrier is a polymer material such as styrene, ester, or ethylene, or an inorganic material such as activated carbon, anthracite, gravel, or quartz sand, and the size is suitably about 0.1 to 20 mm. . In order to promote the adhesion of microorganisms to the surface of the carrier, irregularities and holes may be provided on the surface, or a sponge or an adsorption layer may be formed. The treatment speed is LV = 20 to 400 m / day, and the water flow direction may be either up or down. The biofilm filtration device 6 is an anaerobic bed.
[0012]
The treated water in the second nitrification tank 5 flows into the biofilm filtration device 6. Part of the SS in the wastewater is removed in the first sedimentation basin 1, but the SS contained in the overflow water of the first sedimentation basin 1 is not subject to much biodegradation in the subsequent denitrification tank or nitrification tank without activated sludge. It flows into the biofilm filtration device 6. For this reason, it contains a lot of organic substances that are relatively easily decomposed by microorganisms, and the biofilm filtration device 6 can denitrify NO x remaining in the nitrification tank treated water using SS as an organic substance source under anaerobic conditions . As a result, the biofilm filtration device 6 can perform endogenous denitrification without the need for organic substances from the outside, and can increase the nitrogen removal rate as well as the SS removal rate.
[0013]
In order to perform denitrification, the biofilm filtration device 6 needs to be an anaerobic bed, but an aerobic bed can also be added. This aerobic bed has the effect of nitrifying ammonia produced by microbial degradation of SS. Further, when the biofilm filtration device 6 is an anaerobic bed, treated water lacking DO (dissolved oxygen) may be discharged, but adding an aerobic bed may increase DO in the treated water. it can. Furthermore, when a heat source is obtained, the biofilm filtration device 6 can be heated.
[0014]
[0015]
[0016]
[0017]
【Example】
Examples of the present invention are shown below.
Using the apparatus shown in FIG. 1, an organic wastewater treatment test was conducted. Capacity of each tank is first denitrification tank is 0.3 m 3, the first nitrification tank 0.35 m 3, the second denitrification tank 0.5 m 3, a second nitrification tank 0.35 m 3, 10% by volume each tank Of carrier was added. The amount of treated water is 6 m 3 / day (treatment time: 6 hours), and the raw water distribution ratio is 50% in the former stage and 50% in the latter stage. The nitrification liquid circulation rate is 150% of the raw water. As a result, a nitrogen removal rate of 80% was achieved at the outlet of the second nitrification tank.
[0018]
Further, a biofilm filtration device having only an anaerobic bed was installed at the subsequent stage of the second nitrification tank, and NO x and SS remaining in the nitrification tank treated water were removed without supplying an organic substance source from the outside. The capacity of the biofilm filtration device was 0.1 m 3 , and 3 mm spherical polystyrene was filled as a carrier at a height of 1 m. The LV was 100 m / day, and the water temperature was 20-30 ° C. Table 1 shows the properties of the treated water treated with this biofilm filtration device and the raw water (second nitrification tank outlet water). All numerical values are average values, and the unit is mg / L.
[0019]
[Table 1]
As shown in the experimental data of Table 1, total nitrogen and SS N clearly decreased, and the nitrogen removal rate reached 88%. Further, the increase in NH 4 —N and NO 2 —N means that SS N was decomposed in the biofilm filtration device.
[0021]
【The invention's effect】
As described above, according to the high denitrification process waste water of the present invention, de-install the biofilm filtration device to the waste water treatment process subsequent, the SS processing the NO x remaining in the treated water in water for the organic material source Nitrogen is used, so the addition of chemicals for denitrification is unnecessary or reduced in the biofilm filtration tank, reducing running costs, and the same excellent nitrogen removal rate as when chemicals were added. There are advantages that can be achieved.
[Brief description of the drawings]
1 is a block diagram showing an embodiment of the invention of claim 1;
[Explanation of symbols]
1
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001078137A JP3919455B2 (en) | 2001-03-19 | 2001-03-19 | Advanced denitrification method for waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001078137A JP3919455B2 (en) | 2001-03-19 | 2001-03-19 | Advanced denitrification method for waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002273474A JP2002273474A (en) | 2002-09-24 |
| JP3919455B2 true JP3919455B2 (en) | 2007-05-23 |
Family
ID=18934791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001078137A Expired - Fee Related JP3919455B2 (en) | 2001-03-19 | 2001-03-19 | Advanced denitrification method for waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3919455B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4302411B2 (en) * | 2003-02-28 | 2009-07-29 | 株式会社荏原製作所 | Seawater and brackish water purification method and apparatus |
| JP4859170B2 (en) * | 2005-03-04 | 2012-01-25 | 三菱重工環境・化学エンジニアリング株式会社 | Nitrogen-containing organic wastewater treatment system |
-
2001
- 2001-03-19 JP JP2001078137A patent/JP3919455B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002273474A (en) | 2002-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5651892A (en) | Biodegradeable effluent nutrient removal | |
| CN1309665C (en) | Nitrogen and phosphorus removing process | |
| KR20160147560A (en) | Nitrogen and phosphorus removal device for wastewater | |
| JP4915036B2 (en) | Denitrification method and denitrification apparatus | |
| KR100643775B1 (en) | Treatment hybrid process for remove nutrient using floating microorganism | |
| KR102171918B1 (en) | Recycling and water quality purification treatment system of livestock manure | |
| CN1277942A (en) | System for treatment of water or wastewater, and method using such system | |
| KR101872161B1 (en) | Nitrogen and phosphorus removal device for wastewater | |
| KR100632487B1 (en) | Gradually operated sequencing batch reactor and method thereof | |
| JPH0461993A (en) | Method and apparatus for biological nitration and denitrification of organic polluted water | |
| JP3919455B2 (en) | Advanced denitrification method for waste water | |
| JP2912905B1 (en) | Denitrification and dephosphorization of organic wastewater | |
| JP3607088B2 (en) | Method and system for continuous simultaneous removal of nitrogen and suspended solids from wastewater | |
| JP3449862B2 (en) | Advanced purification method for organic wastewater | |
| JPH09168796A (en) | Removal of nitrogen in waste water | |
| JPH03232590A (en) | Treatment of sewage | |
| KR100243729B1 (en) | Method for treating wastewater biologically by continuously cycling and regenerating powdered zeolite in the bioreactor | |
| JP3973069B2 (en) | Organic wastewater treatment method and apparatus | |
| KR100530555B1 (en) | Small-scale facility and method for treating wastewater biologically | |
| JP3270652B2 (en) | Wastewater nitrogen removal method | |
| JP4023715B2 (en) | Wastewater treatment system | |
| KR100783790B1 (en) | Apparatus for wastewater treatment with multi-stage denitification-filtration and method for wastewater treatment using the same | |
| KR20000013729A (en) | Method and apparatus for removing organic material, phosphor and nitrogen from organic wastewater | |
| RU2170710C1 (en) | Method for biological cleaning of domestic and compositionally analogous industrial waste waters from organic and suspended substances | |
| KR100244536B1 (en) | Device for removing high concentration of organism and nitrogen using biological membrane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040830 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060210 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060406 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060728 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20061201 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070123 |
|
| 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: 20070213 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070213 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 3919455 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100223 Year of fee payment: 3 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100223 Year of fee payment: 3 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100223 Year of fee payment: 3 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100223 Year of fee payment: 3 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100223 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110223 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120223 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120223 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130223 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140223 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |