EP0808671B1 - Procédé de nettoyage de surfaces poreuses avec un liquide de lavage contenant des bactéries ayant une activité enzymatique - Google Patents
Procédé de nettoyage de surfaces poreuses avec un liquide de lavage contenant des bactéries ayant une activité enzymatique Download PDFInfo
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- EP0808671B1 EP0808671B1 EP97401094A EP97401094A EP0808671B1 EP 0808671 B1 EP0808671 B1 EP 0808671B1 EP 97401094 A EP97401094 A EP 97401094A EP 97401094 A EP97401094 A EP 97401094A EP 0808671 B1 EP0808671 B1 EP 0808671B1
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- EP
- European Patent Office
- Prior art keywords
- cleaning
- liquid
- cleaned
- rinsing
- bacteria
- 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
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- 241000894006 Bacteria Species 0.000 title claims abstract description 41
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005406 washing Methods 0.000 title claims description 22
- 230000002255 enzymatic effect Effects 0.000 title claims description 8
- 102000004190 Enzymes Human genes 0.000 claims abstract description 21
- 108090000790 Enzymes Proteins 0.000 claims abstract description 21
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 14
- 239000003876 biosurfactant Substances 0.000 claims abstract description 13
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/001—Treatment of dispersed oil or similar pollution on roads, for instance devices for applying treating agents
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/10—Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
- E01H1/101—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers
- E01H1/103—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers in which the soiled loosening or washing liquid is removed, e.g. by suction
Definitions
- the present invention relates to a method for cleaning surfaces porous surface coatings such as "draining mixes”.
- draining asphalt surface coatings that are used more particularly as road surfaces or other road surfaces, are for the rapid evacuation of rainwater to keep on the surface its characteristics, in particular with regard to the grip of vehicles, because they avoid the risk of slipping and water surfaces stagnant.
- layers of 4 to 5 cm thick composed of bitumen coating gravel with typically 0/10 or 0/14 for grain size.
- These porous, non-waterproof layers are arranged on a substrate. waterproof, usually made of concrete. Similar porous coatings have been used for tennis courts, for example.
- Draining asphalts have cavities when they are placed empty, communicating with each other, preferably representing 10 to 20% of their total volume, which allow the flow of water.
- This type of coating has the disadvantage that the cavities fill more or less quickly of various wastes, leading to an increasingly significant decrease of the initial porosity.
- the filling of the cavities is mainly carried out by up to 95% earth and sand and by compounds various, mainly petroleum residues, rubber powder, metals, carbon, organic matter, ... often around 5%. These 5% of various compounds agglomerate the sands by transforming them into a compact block and waterproof.
- an impermeable surface layer is formed on the surface draining mix. If the total volume of the cavities exceeds 30%, there is a risk of foul pollution by accumulation of standing water laden with materials organic. It is therefore not possible to significantly increase the importance of cavities in order to delay their clogging.
- a cross section of a draining asphalt often leads to observation of two layers of pollution: predominantly organic pollution is observed at the surface while petroleum products agglomerating sands and gravel are dominant in depth.
- the subject of the present invention is a method for cleaning the porous surfaces, such as drainage mixes used as coatings roads or other public or private roads, which avoids disadvantages of known methods and to restore the original porosity without damaging the surface and no packing effect of clogging materials and waste, and which allows waste to be extracted while respecting the requirements of Environmental Protection.
- Patent application DE-4014854 A1 discloses a cleaning process using an enzymatic washing liquid for the elimination of grease on concrete, cement or stone surfaces.
- the liquid is spread over the surface to be cleaned by brushing and the simultaneous application of pressurized air arriving through the brushes. It is necessary to work on higher temperature than room temperature and repeat the process wash and brush several times before rinsing the surface with the water.
- the method proposed by the invention which relates to deep cleaning not on the surface, does not use an application with pressurized air, nor brushing the surface to be cleaned.
- the washing liquid must enter the draining asphalt cavities where it can exert its cleaning action.
- the present invention provides that the rinse water is applied under pressure by nozzles having a slight inclination on horizontally before being vacuumed together with the unclogged residue.
- Patent FR 2640528 proposes the use of microorganisms for the direct degradation of dyestuffs and patent WO 9603754A1 that of microorganisms to decontaminate metals and cements in installations nuclear. These processes certainly use microorganisms but have no relation to the unclogging of particles in asphalt draining.
- the actual washing can be preceded a pretreatment of the surface area of the porous surface, having as an object to dissolve the hydrocarbon particles which will then be biodegraded during washing consisting of a bacterial treatment.
- Pre-wash liquid is obtained by dilution in water, at a rate of 0.2 to 1% for example, of a complex biosurfactant derived from bacteria, combined with a biodegradable surfactant.
- the washing operation is followed by a rinsing / aspiration operation after a sufficient time of action of the washing liquid on the deep area.
- a rinse aid is spread and then collected by suction together with the unclogged residues.
- the rinsing liquid is preferably pressurized water, of the order of 200 to 350 bars from feed pumps, distributed inside a rinsing bell, by a rotary arm carrying ejection nozzles which have a small angle, of the order 30 ° from the surface to be cleaned, and which are arranged at a distance advantageously between 40 and 60 mm from the surface to be cleaned.
- the flow rinse aid is preferably about 1.5 liters per minute per decimeter square surface area of the bell.
- the rinsing bell, enclosing the nozzle support arm is kept at a fixed distance from the ground, and is sealed by a flexible seal, for example rubber, rubbing slightly on the porous surface to be cleaned.
- the method according to the invention allows the destruction of the layer surface that could have formed on the surface of the porous coating of surfaces, then from the deep layer of the products sintering the sands which find porous surface coatings in the cavities.
- the clogging sands the cavities regain their mobility and can then be removed from the coating by suction.
- the invention proposes the use of a washing liquid containing enzymes and bacteria which, essentially, destroy the agglomerating products.
- the washing liquid is composed of water in which the enzymatic and bacterial solutions are diluted without the addition of solvents. These solutions are preferably produced in situ .
- the bacteria used in the context of the invention are advantageously of the pseudomonas , moraxella , bacillus type, alone or in consortium (associated) with other bacteria which have a strong appetite for hydrocarbons.
- the exact type of bacteria or mixture of bacteria may vary and will be determined according to the type of sealants, in particular the predominant type of organic waste and hydrocarbons identified on the site to be treated.
- enzymes take off substances nutrients that bacteria need thanks to their “bio-surfactant” power or “Natural surfactant”, which brings food within reach of bacteria.
- bio-surfactant power or "Natural surfactant”
- Enzymes hydrolyze chains hydrocarbon chemicals to allow bacteria to digest hydrocarbon compounds with shorter chains. Bacteria renew themselves in about twenty minutes and produce new enzymes. In end of cycle, bacteria release carbon dioxide, water, non-digestible matter.
- Enzymes and bacteria that remain in the draining asphalt after its cleaning according to the invention remain as long as the bacteria find food from new projections of organic matter and only minimal humidity is maintained. They prevent the accumulation of agglomerating products sands and gravels.
- the bacteria selected for the washing liquid are harmless to the environment and die when they no longer have a sufficient food. Organic and hydrocarbon waste falling on the road on the occasion of its frequentation and the cycle of the seasons contribute to a regular food intake.
- the enzymes and bacteria used are not only biodegradable but biodegradable.
- the invention has the advantage of allowing the extraction of sands particularly clean, which can be landfilled without causing pollution.
- Liquids recovered after being used for entraining agglomerating products are loaded with petroleum residues, miscellaneous organic residues, dust, sand and gravel, carbon powder, and low concentration enzymes and bacteria that are processed, if necessary, to arrive at standardized concentrations, less than 1 ppm or 10 ppm depending on the enzymes and bacteria used, before discharge into existing sanitation networks. No pollution is to be feared because of these discharges because they are cleaned by bacteria like in a wastewater treatment plant.
- the method according to the invention is implemented by means of a machine cleaning with powerful mechanical-hydraulic means.
- the prewash liquid of the surface area of the porous surface is advantageously obtained by dilution in water, for example, at a rate of 0.2 to 1% of a complex of biosurfactant enzymes, derived from microorganisms, playing the role of neutral detergents and surfactants compatible with the bacterial cultures found on site.
- the basic preparation usefully has the following characteristics: apparent density 1 pH between 10 and 12 pH in 1% solution between 8.5 and 11.5 viscosity ⁇ 400 cts fully soluble in water
- the rinsing liquid is preferably water under pressure, of the order from 200 to 350 bar from the feed pumps, distributed inside rinsing bells, by a rotating arm carrying ejection nozzles.
- the flow rinse aid is preferably 1.5 liters per minute per decimeter square surface area of the bell. These nozzles have a small angle, around 30 ° relative to the surface to be cleaned, resulting in almost tangent jets on the surface to be cleaned, which avoids any risk of compaction.
- the bell flush enclosing the nozzle support arm is kept at a distance fixed relative to the porous surface to be cleaned. It is made waterproof by a flexible seal, for example rubber, rubbing lightly on the surface porous to clean.
- the distance between the ground and the ejection nozzles is preferably between 40 and 60 mm.
- the rotation of the nozzle-carrying arm creates a cyclone hydraulic which generates a natural depression large enough to by suction, by its sole force, the rinsing liquid which is loaded with waste and sand.
- the quantity of sands to be vacuumed can become very large, for example in the case of roads leaving a site. More than 10 kg of sand per m 2 of rolling surface could be found in certain areas of the Paris ring road. It is then advisable to carry out a powerful suction of the washing water loaded with sand.
- a cleaning test of an urban site implementing the process according to the invention has been carried out.
- a draining mix with porosity average of 1.26 was put in place in July 1991. No cleaning of the coating porous to restore its original characteristics has not been carried out for 38 months.
- the porosity measured is then zero.
- Cleaning with prewash, washing, rinsing and suction, according to the invention is then carried out.
- an average porosity could be observed of the order of 0.6.
- Rinsing leaves bacteria on the site. Five days after cleaning performed according to the invention, a storm occurs.
- a new measure of porosity gives an average of 1 with points at 1.18, i.e. a porosity practically returned to its original value, and shows that bacteria left on site during rinsing continued to feed on clogging.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Detergent Compositions (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Description
- Pulvérisation d'eau à haute pression (entre 40 et 250 bars) pour détruire la cohésion entre les sables et les composés agglomérants.
- Aspiration par une turbine à dépression capable d'aspirer entre 20 000 et 35 000 m3/H.
- la pression de pulvérisation qui est d'autant plus élevée que l'enrobé drainant est colmaté,
- le débit d'eau,
- l'orientation des jets,
- la vitesse d'avancement qui est d'autant plus lente que l'enrobé drainant est colmaté,
- le nombre de passages.
| < 2 µm | 0,3 |
| 2-20 µm | 2,6 |
| 20-50 µm | 1,5 |
| 50-200 µm | 6,1 |
| 200-2000 µm | 32,9 |
| > 2000 µm | 56,6 |
- Epandage d'un liquide de lavage de la zone profonde de la surface poreuse constitué d'une préparation aqueuse contenant des bactéries ayant une activité enzymatique, les enzymes produites pratiquant une hydrolyse des hydrocarbures du fait de biosurfactants ou des tensio-actifs naturels.
- Après un temps suffisant pour que le liquide de lavage de la zone profonde ait pu agir, épandage d'un liquide de rinçage, et sa récupération par aspiration, ainsi que des résidus colmatés.
- La production in situ des solutions enzymatiques et biosurfactantes à partir de réacteurs adaptés aux contraintes des sites à traiter. Il peut s'agir de réacteurs fixes situés près des zones à nettoyer, avec remplissage des citernes de transport et d'épandage, ou de réacteurs mobiles amenés sur les chantiers.
- Le nettoyage mécanique par brossage de la zone à traiter si elle présente des accumulations superficielles de matériaux.
- L'épandage à une pression inférieure à 90 bars et à une température inférieure à 60°C d'un liquide de prélavage de la zone superficielle de la surface poreuse et sa récupération en tant que de besoin après un temps suffisant, de l'ordre d'au moins 5 à 20 minutes, pour qu'il ait pu agir.
- L'épandage d'un liquide de lavage de la zone profonde de la surface poreuse.
- Après un temps suffisant pour que le liquide de lavage de la zone profonde ait pu agir, épandage d'un liquide de rinçage, et sa récupération par aspiration.
| densité apparente | 1 |
| pH | entre 10 et 12 |
| pH en solution à 1% | entre 8,5 et 11,5 |
| viscosité | < 400 cts |
| entièrement soluble dans l'eau |
- Prélèvement de souches bactériennes sur le site à nettoyer avant les opérations de nettoyage. Les bactéries présentes sur le site à nettoyer sont les mieux adaptées à la pollution à combattre car elles ont par sélection naturelle éliminé la plupart des autres bactéries.
- Sélection des bactéries à partir des prélèvements pour constituer une souche bactérienne par exemple d'environ 100 g.
- Pré-développement pendant une huitaine de jours de la souche bactérienne dans un réacteur biologique d'environ 1 m3 dans de l'eau tiède avec une alimentation propice, c'est-à-dire sous apport de graisses et de nutriments, agitation et oxygénation pour avoir un bon développement bactérien et une sécrétion des enzymes exogènes correspondantes.
- Développement pendant deux jours dans un réacteur de 7 à 8 m3 dans l'eau tiède avec une alimentation propice, c'est-à-dire sous apport de graisses et de nutriments, agitation et oxygénation pour avoir un bon développement bactérien et une sécrétion des enzymes exogènes correspondantes.
- malaxage des enzymes et du sable,
- décollage des grains de sable,
- aspiration des grains de sable.
Claims (10)
- Procédé de nettoyage de surfaces poreuses de revêtements appelés « enrobés drainants », qui comprend pour l'essentiel une phase de lavage à l'aide d'une préparation aqueuse contenant des bactéries à activité enzymatique, suivie d'une phase de rinçage et d'aspiration des liquides et des résidus comprenantun liquide de lavage de la zone profonde de la surface poreuse constitué d'une préparation aqueuse contenant des bactéries ayant une activité enzymatique dont les enzymes pratiquent une hydrolyse des hydrocarbures du fait de biosurfactants ou des tensio-actifs naturels, est appliqué sur la surface à nettoyer à température ambiante, par simple épandage sans pression, ni de brossage, et pénètre dans la zone profonde de la surface à nettoyer pour y décolmater les résidus,après un temps suffisant pour que le liquide de lavage de la zone profonde ait pu agir et décolmater les résidus, un liquide de rinçage, constitué de préférence d'eau sous pression, est distribué à l'intérieur d'une cloche de rinçage par un bras rotatif portant des buses d'éjection qui présentent un angle faible par rapport à la surface à nettoyer,le liquide de rinçage et les résidus décolmatés sont récupérés par aspiration grâce à la cloche de rinçage,le nettoyage proprement dit est précédé en cas qu'il y ait un besoin d'un prétraitement de la seule zone superficielle de la surface à nettoyer.
- Procédé de nettoyage de surfaces poreuses selon la revendication 1 caractérisé en ce que le prétraitement de la zone superficielle de la surface poreuse à nettoyer consiste en un épandage à une pression inférieure à 90 bars et à une température inférieure à 60°C d'un liquide de prélavage de la zone superficielle de la surface poreuse et sa récupération en tant que de besoin après un temps suffisant, de l'ordre d'au moins 5 à 20 minutes, pour qu'il ait pu agir.
- Procédé de nettoyage de surfaces poreuses selon les revendications 1 et 2 caractérisé par un liquide de prélavage de la surface poreuse, obtenu par dilution dans l'eau à raison de 0,2 à 1% d'un complexe biosurfactant, issu de bactéries, associé à un tensio-actif bio-dégradable.
- Procédé de nettoyage de surfaces poreuses selon les revendications 1 à 3 ca ractérisé par la production in situ des solutions enzymatiques et biosurfactantes.
- Procédé de nettoyage de surfaces poreuses selon l'une des revendications 1 à 4 caractérisé par la mise en oeuvre de réacteurs fixes situés près des zones à nettoyer, avec remplissage des citernes de transport et d'épandage.
- Procédé de nettoyage de surface poreuses selon l'une des revendications 1 et 5 caractérisé en ce que le prélavage etlou le lavage peuvent être précédés d'un nettoyage mécanique par brossage de la zone à traiter si elle présente des accumulations superficielles de matériaux.
- Procédé de nettoyage de surfaces poreuses selon l'une des revendications précédentes caractérisé en ce quela pression avec laquelle est appliquée le liquide de rinçage est de préférence de l'ordre de 200 à 350 bars au départ des pompes d'alimentation,les buses d'éjection portées par le bras rotatif à l'intérieur de la cloche de rinçage présentent de préférence un angle de l'ordre de 30° par rapport à la surface à nettoyer et sont disposées entre 40 et 60 mm de la surface à nettoyer,le débit du liquide de rinçage est de préférence d'environ 1,5 litre par minute et par décimètre carré de surface au sol de la cloche,la cloche de rinçage, enfermant le bras porteur des buses est maintenue à une distance fixe par rapport au sol, et est rendue étanche par un joint souple, par exemple en caoutchouc, frottant légèrement sur la surface poreuse à nettoyer.
- Procédé de nettoyage de surfaces poreuses selon la revendication 7 caractérisé par une aspiration annulaire complémentaire au cyclone intérieur de la cloche de rinçage.
- Procédé de nettoyage de surfaces poreuses selon l'une des revendications précédentes caractérisé en ce que au moins 1% des bactéries subsistent après rinçage dans les cavités de la couche d'enrobé drainant.
- Procédé de nettoyage de surfaces poreuses selon l'une des revendications précédentes caractérisé en ce que les bactéries utilisées sont déterminées en fonction des caractéristiques des colmatants identifiés sur le site à traiter et sont avantageusement du type pseudomonas, moraxella, bacillus seules ou en consortium (associées) à d'autres bactéries qui présentent un fort appétit pour les hydrocarbures.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9606203A FR2748676B1 (fr) | 1996-05-20 | 1996-05-20 | Procede de nettoyage de surfaces poreuses avec un liquide de lavage contenant des bacteries ayant une activite enzymatique |
| FR9606203 | 1996-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0808671A1 EP0808671A1 (fr) | 1997-11-26 |
| EP0808671B1 true EP0808671B1 (fr) | 2002-12-18 |
Family
ID=9492259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97401094A Expired - Lifetime EP0808671B1 (fr) | 1996-05-20 | 1997-05-16 | Procédé de nettoyage de surfaces poreuses avec un liquide de lavage contenant des bactéries ayant une activité enzymatique |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0808671B1 (fr) |
| AT (1) | ATE229846T1 (fr) |
| DE (1) | DE69717909T2 (fr) |
| DK (1) | DK0808671T3 (fr) |
| ES (1) | ES2186852T3 (fr) |
| FR (1) | FR2748676B1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817929B1 (ko) | 2006-08-21 | 2008-03-31 | 박경량 | 생물 계면활성제를 생산하는 신규한 슈도모나스 g314 균주 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2952373B1 (ja) * | 1998-09-09 | 1999-09-27 | 株式会社 羽野組 | 建造物の清掃方法 |
| GB9917147D0 (en) * | 1999-07-21 | 1999-09-22 | Swan Adam | Cleaning system |
| EP1255620A1 (fr) * | 2000-02-10 | 2002-11-13 | Brain Craft Product Management GmbH & Co KEG | Procede et produit de nettoyage pour le nettoyage de surfaces en beton, asphalte ou analogue |
| US7144725B2 (en) * | 2003-03-03 | 2006-12-05 | University Of North Dakota | Removal of toxic/hazardous chemicals absorbed in building materials |
| CN101332459B (zh) * | 2007-06-26 | 2011-11-30 | 上海裕隆生物科技有限公司 | 一种多孔板的清洗头 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2640528A1 (fr) * | 1988-12-21 | 1990-06-22 | Ass Tech Rech Indle | Procede de nettoyage d'inscriptions et graffitis sur des surfaces de batiments, monuments et autres ouvrages de genie civil, et produit pour la mise en oeuvre de ce procede |
| DE4014854A1 (de) * | 1990-05-09 | 1991-11-14 | Biek Volker Dr | Verfahren und zugehoerige vorrichtung zum entfernen von oel- und fettablagerungen auf beton-, zement- oder steinboeden |
| FR2702397B1 (fr) * | 1993-03-11 | 1995-04-14 | Uwer Assainissement Ets J | Dispositif de projection d'un fluide sous pression et machine de nettoyage de surfaces, notamment de chaussées. |
| GB9415213D0 (en) * | 1994-07-28 | 1994-09-21 | British Nuclear Fuels Plc | A method of decontaminating a cementitious or a metallic surface |
-
1996
- 1996-05-20 FR FR9606203A patent/FR2748676B1/fr not_active Expired - Fee Related
-
1997
- 1997-05-16 AT AT97401094T patent/ATE229846T1/de not_active IP Right Cessation
- 1997-05-16 EP EP97401094A patent/EP0808671B1/fr not_active Expired - Lifetime
- 1997-05-16 DK DK97401094T patent/DK0808671T3/da active
- 1997-05-16 DE DE69717909T patent/DE69717909T2/de not_active Expired - Lifetime
- 1997-05-16 ES ES97401094T patent/ES2186852T3/es not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817929B1 (ko) | 2006-08-21 | 2008-03-31 | 박경량 | 생물 계면활성제를 생산하는 신규한 슈도모나스 g314 균주 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0808671A1 (fr) | 1997-11-26 |
| DE69717909T2 (de) | 2003-11-13 |
| ATE229846T1 (de) | 2003-01-15 |
| ES2186852T3 (es) | 2003-05-16 |
| DK0808671T3 (da) | 2003-04-14 |
| FR2748676A1 (fr) | 1997-11-21 |
| DE69717909D1 (de) | 2003-01-30 |
| FR2748676B1 (fr) | 1998-07-31 |
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