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WO1998016261A1 - Procede et appareil de desodorisation et de detoxification - Google Patents

Procede et appareil de desodorisation et de detoxification Download PDF

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Publication number
WO1998016261A1
WO1998016261A1 PCT/AU1997/000699 AU9700699W WO9816261A1 WO 1998016261 A1 WO1998016261 A1 WO 1998016261A1 AU 9700699 W AU9700699 W AU 9700699W WO 9816261 A1 WO9816261 A1 WO 9816261A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
deodourising
detoxifying
housing
deodorising
Prior art date
Application number
PCT/AU1997/000699
Other languages
English (en)
Inventor
John Steiner
Original Assignee
Enviro-Mate Pty. Ltd.
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
Priority claimed from AUPO3024A external-priority patent/AUPO302496A0/en
Priority claimed from AUPO3213A external-priority patent/AUPO321396A0/en
Application filed by Enviro-Mate Pty. Ltd. filed Critical Enviro-Mate Pty. Ltd.
Priority to AU45449/97A priority Critical patent/AU4544997A/en
Publication of WO1998016261A1 publication Critical patent/WO1998016261A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/82—Solid phase processes with stationary reactants
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/08—Ventilation of sewers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/11—Clays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708

Definitions

  • This invention relates to method and apparatus for deodourisation and detoxification.
  • This invention has particular but not exclusive application to deodourising and detoxifying vent pipes from organic waste treatment systems and more particularly to the exhausts of pumping stations, and for illustrative purposes reference will be made to such application.
  • this invention could be used in other applications, such as deodourising, detoxifying and/or recovery of materials in other systems including chemical and food processing systems, disposal systems or in decontamination of vapour streams and such like, any of which may be on marine vessels or land installations.
  • odours and toxic gases are usually generated.
  • Such odours may be unpleasant or irritating and may attract flies and other vermin and may contribute to the spread of diseases, and toxic gases pose a health and safety problem.
  • Products based on enzymes, co-enzymes, specifically formulated micro-organisms or a combination of the above, yeast cultures, natural organic products and specific chemical compositions have been used without long term success in combating such odours.
  • the main disadvantages of these products are that the application is labour intensive, the product is expensive and the degree of effectiveness and reliability is moderate.
  • Another procedure to control odours is the use of chemical agents which are spread over the surface of the waste material or mixed with the effluent.
  • the use of lime is a well known very short term solution, but more recently, oxidising compounds such as paraformaldehyde, hydrogen peroxide, potassium permanganate and ozone have been used. Again, the main disadvantages are the expense of the chemicals and their method of application.
  • a further known process in the management of odours in the domestic environment is in the manufacture and design of more efficient small scale human waste disposal systems.
  • Design features such as improved oxygen supply, higher air exchange, heat exchange capacity, size of collection tank, dilution ratio, loading rate and removal rate have been taken into account.
  • the main problems with such an approach are that the complexity of the management system is high and the cost effectiveness and the degree of reliability is low.
  • Another problem associated with waste disposal systems is the breaking of water seals caused by gusty wind conditions which can generate a pulse of air pressure which enters an elevated vent pipe. This initiates pressure differentials within the waste disposal system and occasionally breaks water seals. As a consequence, odours and/or toxic gases from the waste disposal system may escape unabated into the environment. In domestic settings, this may lead to the escape of unpleasant odours into a dwelling.
  • the current system provides one seal which is a water seal in the pan with the purpose of preventing biogas and toxic gases escaping into the dwelling. Recent findings have revealed that the reliability and stability of the water seal in the pan is low, and the water seal is vulnerable to changes in pressure differentials in the piping system.
  • this invention in one aspect resides broadly in deodourising apparatus including: housing means adapted for interposition between an odour source and an environment external to the odour source; a porous deodourising composition operably placed in the housing for contact with the odour penetrating therethrough, and retaining means for retaining the porous deodorising composition in the housing means, said permeable separation means permitting odours to penetrate therethrough.
  • the housing means may be adapted for attachment to the distal end of a vent pipe, the vent pipe being operably connected to an odour source, such as a sewerage or septic waste disposal system, pumping station or such like.
  • an odour source such as a sewerage or septic waste disposal system, pumping station or such like.
  • the housing means is suitable for insertion in line with the vent pipe, or operably associated with the exits of vent pipes of pumping stations.
  • the deodorising composition may be an adsorbent such as activated carbon or such like.
  • the deodorising and/or detoxifying composition is a porous mineral composition and the odours and/or toxic gases passing into the housing are rendered non-odourous and/or non-toxic by contact therewith.
  • the retaining means may be in the form of an abutment adapted to retain an integrally formed porous deodourising composition, the abutment being formed in, or operably associated with, the housing.
  • the porous mineral composition includes one or more granulated minerals, and the granulated minerals may be in the form of a mobile solid, and the retaining means includes permeable separation means permitting odours to penetrate therethrough.
  • At least some of the porous mineral composition may include material which is microporous.
  • This invention also embraces the provision of a "two stage seal system" which is an extension to the one stage seal currently in use on disposal systems.
  • Experimental evidence has demonstrated that the deodourisation and detoxification apparatus described herein when installed for experimental purposes on the exits of vent pipes also acts as a damper to reduce pressure differentials in the piping system, resulting in an increase, possibly 85% in the reliability and stability of the water seal in the pan. This improvement is believed primarily to be due to establishing a semi-enclosed section in the piping system between the exit of the vent pipe and the exit of the waste disposal pipe after the water seal.
  • Provision of such a semi-enclosed section facilitates significant reductions of pressure differential in the piping system and thus assists in minimising dynamic equilibrium changes among the aerodynamic and fluid mechanics mechanisms active in the piping system.
  • the main benefits of the two stage seal system are improvements in public health and safety and an increase in the reliability of the human waste system.
  • this invention resides broadly in a deodourising and/or detoxifying composition
  • a deodourising and/or detoxifying composition including: a zeolite and a clay in a proportion one to another, and wherein said proportions of said zeolite and said clay are provided in proportions in a range of from 99%:1% to 1%:99% by weight of said deodorising and/or detoxifying composition.
  • the zeolite and the clay are crushed or comminuted and classified to a desired granular size. It will be appreciated that zeolites are naturally highly porous, such that it is preferred that the zeolite and the clay exhibit a high surface area per unit volume.
  • the composition may additionally comprise one or more additive compounds selected from oxidising agents, drying agents, fly repellents, insecticides, germicides, antifeedants, fragrances and antimicrobial agents.
  • additive compounds selected from oxidising agents, drying agents, fly repellents, insecticides, germicides, antifeedants, fragrances and antimicrobial agents.
  • the additive compounds are selected to be compatible with one another.
  • the oxidising agent may be any oxidising agent, such as for example, dichloroisocyanuric acid, potassium permanganate, sodium hypochlorite, trichloroisocyanuric acid, and/or calcium hypochlorite.
  • the preferred oxidising agents are selected from trichloroisocyanuric acid, and calcium hypochlorite .
  • the drying agent may be any drying agent compatible with the other additive compounds, such as for example, zinc chloride and/or magnesium perchlorate.
  • the fly repellent may be citronella
  • the insecticide may be pyrethrum.
  • the antifeedant may be neem (or nim) oil
  • the fragrance may be peppermint, eucalyptus or pine oil
  • the antimicrobial agent may be phenylphenol amphotericin B, ferrous sulfate or the formulation known by the trade name Fungizone.
  • the sterilization agent may be preferably orthodichlorobenzene, paradichlorobenzene, benzalkonium chloride, ethanolamine, glyoxal or succinaldehyde.
  • the additive compounds may be added in any suitable proportion to achieve the desired result and can be from 0% to 50% by weight of the mixture.
  • the effectiveness of the treatment apparatus is believed to be based on the composition and mixing ratios of the porous deodourising composition and the unique properties of highly specific minerals therein, being a natural zeolite and a clay.
  • An integral part of the zeolite is believed to be the silicate framework which may consist of separate tetrahedra, separate multiple tetrahedral groups, double chains, sheets or three dimensional box work, depending on the degree of polymerization and the extent of oxygen sharing between the tetrahedra.
  • the highly porous nature of the minerals and the high surface area and physical configuration of the structure of the minerals provide an adsorption capacity of over 36% weight per volume.
  • These interconnecting channels are believed to have an imbalance of molecular forces which permit volatile organic molecules to be adsorbed on the internal surfaces of these channels. It is believed that the adsorption capacity is significantly improved and/or prolonged by impregnating the internal surfaces with the additive compounds. Due to an excess of additive compounds being present, the mineral is continuously chemically treated and thus the effectiveness of the impregnation is sustained so long as the reservoir of additive compounds does not get depleted.
  • the additive compounds are highly reactive, the minerals carry different electrical charges and due to the oxygen in the air and tiny moisture droplets and/or high psychrometric moisture content of the air delivering the biogases and toxic gases into the treatment apparatus, organic compounds such as skatole, indole, methylamine, thiols, alcohols and toxic compounds such as hydrogen sulfide are decomposed by catalytic oxidation.
  • hydrogen sulfide is oxidised in the presence of moisture, chemicals and minerals to form elemental sulfur and sulfide and/or sulfate.
  • Organic compounds may be oxidised to carbon dioxide, water and mineral acids.
  • composition of this invention comprises a mixture of 30% by weight clinoptilolite, 15% by weight montmorillonite clay and 15% by weight mica deodite, 30% by weight orthodichlorobenzene and 10% by weight trichloroisocyanuric acid.
  • Figure 1 is a cross-section diagrammatic view of a treatment apparatus adapted for use near the upstanding proximal end of a vent pipe;
  • Figure 2 is a cross-sectional diagrammatic view of the an alternative form of the treatment apparatus of Figure l;
  • Figure 3 is a cross-section diagrammatic view of a treatment apparatus adapted for use in line with a vent pipe;
  • Figure 4 is a cross-section diagrammatic view of an alternative form of treatment apparatus;
  • Figure 5 is a cross-section diagrammatic view of the structure of the alternative form of treatment apparatus of Figure 4, and
  • FIG 6 shows a further alternative configuration of the treatment apparatus of Figures 4 and 5.
  • a treatment apparatus 10 includes a housing 19 for housing a deodorising/detoxifying medium 11 therein.
  • the housing 19 includes a bottom support mesh 12 and a top support mesh 13.
  • the housing 19 is joined to the distal end of a vent pipe 25 by a joiner 18.
  • a top vent 16 which is also provided with a cowling 17.
  • the purpose of the cowling 17 is to prevent rainwater or such like from entering in the top vent
  • an alternative treatment apparatus 20 is similar to the treatment apparatus 10 except that its connection to the distal end of the vent pipe 25 is by means of a bell connection 28 provided at the proximal end of an alternative housing 29.
  • the deodorising/detoxifying medium 11, the top and bottom support mesh 13 and 12 respectively and the upper and lower porous separators 14 and 15 respectively are provided with the necessary changes in configuration to accommodate the bell connection 28.
  • an in-line treatment apparatus 30 is provided with an in-line housing 31.
  • the filter/detoxifying medium 11 and the upper porous separator 14 and lower porous separator 15 are provided as in the description hereinbefore in relation to Figures 1 and 2.
  • a slidable sleeve 33 is provided which may slide axially in relation to the vent pipe 25 and permit the in-line housing 31 to be removed from the vent pipe 25 laterally with respect to a vent pipe axis 34.
  • a locking ring 32 is provided on one end of the vent pipe 25 so that the in-line housing 31 may be aligned axially with the vent pipe 25.
  • An abutment 31 is provided on the housing 31 both to permit the accurate location of the inline housing 31 with respect to the locking ring 32 and to permit the slidable sleeve 33 to be wedged against a ramp portion 35 on the abutment 38 so that the slidable sleeve 33 is not accidentally moved, thereby preventing accidental dislodgement of the in-line treatment apparatus 30 from the vent pipe 25.
  • a further alternative treatment apparatus 40 is provided with the deodorising/detoxifying medium 11 inside a bag 41.
  • the bag 41 is of a size which permits a close fit inside the internal diameter of a bag housing 49. The close fit is provided in order to prevent short circuiting of odourous fluid past the bag 41.
  • the bag housing 49 includes a belled end 48 similar to the bell connection 28 described in relation to the alternative housing 29 of Figure 2.
  • the bag 41 is provided with a string 42 to permit removal of the bag 41 from the bag housing 49, the string 42 being operatively connected to the bag 41 by a string connector 43.
  • a mesh support 45 is interposed between the vent pipe 25 and the bag housing 49 to prevent the bag 41 from penetrating the vent pipe 25.
  • the bag 41 is constructed from a double layer comprising a hollow cylinder 47 and externally thereto a vacuum seal 46.
  • a further alternative form of treatment apparatus is specifically designed for use on pumping stations.
  • the further alternative form of treatment apparatus includes three main parts; a roof 50, a reducer 51 and a housing 47 for retaining a deodourising/detoxifying medium 52.
  • the method for construction if the housing 47 is similar as described above in respect of Figures 1 and 2.
  • the roof 50 is constituted by a standard uPVC SWV 180° bend of 100 mm nominal diameter.
  • the reducer is a standard uPVC
  • the housing 47 is a moulded uPVC fitting female to female and is meant to fit over the top of a uPVC SWV vent pip of 150 mm nominal diameter.
  • THe elements used for the internal housing of the deodourising/detoxifying medium 52 are identical to that described above in respect of Figures 1 and 2 except for dimensions and quantity of medium.
  • the housing of the treatment apparatus preferably consists of a uPVC pipe of 65 mm length with an inside diameter of 50 mm.
  • a section of this pipe 35 mm long is enlarged or belled out to fit snugly over a 50 mm diameter toilet vent pipe.
  • the joint is not glued, but an interference fit provided to prevent the treatment apparatus being accidentally dislodged from the end of the vent pipe.
  • the 50 mm internal diameter end of the housing is heat sealed with a fibre glass fabric over which a mesh is also heat sealed onto the end of the housing.
  • a disc with an outside diameter of 57 mm is constructed from a 7 mm length of pipe and heat sealed with mesh and fibreglass fabric over the mesh. This disc is then press fitted into the enlarged section of the housing to hold the deodourising material therein firmly.
  • a 50 mm diameter cowl is placed over the treatment apparatus and a 100 mm diameter end cap is then put on the cowl and these two commercially available items are secured together with a self sealing roof screw.
  • the presence of the treatment apparatus in the vent pipe serves to dampen sudden changes in air pressure such as may prevail in gusty wind conditions.
  • the treatment apparatus may be used in conjunction with water seals to prevent breakage of the water seal and ameliorate any escape of odour. It will be appreciated that the treatment apparatus need not be installed at the top of the vent pipe and can be fitted at any point along the vent pipe. However, it is believed that at the end of the vent pipe will be a convenient location and will substantially permit conformity with current regulations.
  • the preferred location is in line with the vent pipe, but where access is convenient without the necessity to climb ladders and/or onto the roof of a building. It is also believed that the efficacy of the treatment apparatus of this invention obviates the necessity for the vent pipe to have an elevated opening to the environment since the main reason for the elevated opening is to disperse odours above those likely to be affected by such odours, and such an arrangement would be more convenient to maintenance purposes because access to an elevated position would not be required.
  • the deodourisation and detoxification apparatus of the present invention may be provided in a number of different sizes suitable for different applications.
  • filters may be provided in cartridges having capacities ( in litres) and the associated sizes as follows: 275,400 litre capacity with a diameter of 60 mm and a length of 65 mm; 1,036,800 litre capacity with a diameter of 110 mm and a length of 160 mm; 2,203,200 litre capacity with a diameter of 170 mm and a length of 160 mm; 10,368,000 litre capacity with a diameter of 315 mm and a length of 460 mm.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Animal Behavior & Ethology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Treating Waste Gases (AREA)

Abstract

Cet appareil de désodorisation comprend un boîtier conçu pour être placé entre une source d'odeurs et un milieu externe à la source d'odeurs, une composition désodorisante poreuse placée au moment de l'utilisation dans le boîtier de façon à venir en contact avec l'odeur qui la traverse, et un moyen de séparation perméable servant à retenir la composition de désodorisation poreuse dans le boîtier, ce moyen de séparation perméable permettant aux odeurs de traverser la composition. Le boîtier peut être conçu pour être fixé à l'extrémité distale d'un tuyau d'évent ou pour être inséré en ligne avec le tuyau d'évent ou pour être associé de toute autre manière au moment de l'utilisation avec la sortie d'un tuyau d'évent. Cet appareil peut également servir d'amortisseur pour réduire les différentiels de pression dans le tuyau d'évent. La composition de désodorisation et/ou de détoxication est constituée par une composition minérale poreuse granulée et les odeurs et/ou les gaz toxiques pénétrant dans le boîtier sont rendus inodores et/ou non toxiques par contact avec cette composition. Cette composition de désodorisation et/ou de détoxication contient de façon générale une zéolite granulée ou une argile granulée dans une proportion comprise entre 99 %/1 % et 1 %/99 % en poids de la composition de désodorisation et/ou détoxication. Cette composition peut contenir en outre un ou plusieurs composés additifs choisis parmi les agents oxydants, tels que l'acide dichloro-isocyanurique, le permanganate de potassium, l'hypochlorite de sodium, l'acide trichloro-isocyanurique et/ou l'hypochlorite de calcium; des agents déshydratants, tels que du chlorure de zinc et/ou du perchlorate de magnésium; des répulsifs anti-mouches, tels que la citronelle; des insecticides, tels que le pyrèthre; des anti-appétants, tels que de l'huile de mangousier; des parfums, selon les besoins; et des agents antimicrobiens, tels que l'amphotéricine B de phénylphénol, du sulfate ferreux ou Fungizone; ces additifs étant choisis pour être compatibles les uns avec les autres.
PCT/AU1997/000699 1996-10-16 1997-10-16 Procede et appareil de desodorisation et de detoxification WO1998016261A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45449/97A AU4544997A (en) 1996-10-16 1997-10-16 Method and apparatus for deodorisation and detoxification

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPO3024 1996-10-16
AUPO3024A AUPO302496A0 (en) 1996-10-16 1996-10-16 Method and apparatus for deodourisation
AUPO3213A AUPO321396A0 (en) 1996-10-25 1996-10-25 Method and apparatus for deodourisation
AUPO3213 1996-10-25

Publications (1)

Publication Number Publication Date
WO1998016261A1 true WO1998016261A1 (fr) 1998-04-23

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1325197A1 (fr) * 2000-09-13 2003-07-09 SL Parkhurst Corporation Dispositif d'elimination d'air vicie
WO2004023998A1 (fr) * 2002-09-16 2004-03-25 Aerocrine Ab Epurateur
FR2898514A1 (fr) * 2006-03-15 2007-09-21 Jacky Jumel Procede de filtration, support de filtre auto-aspirant et filtre auto-aspirant pour la mise en oeuvre de ce procede
US20070292884A1 (en) * 2006-06-19 2007-12-20 Becton, Dickinson And Company Methods and compositions for obtaining amplifiable nucleic acids from tissues, cells, or viruses exposed to transport media
EP2518023A1 (fr) 2011-04-29 2012-10-31 Cornelsen Solutions GmbH Dispositif et procédé destinés à éviter ou à diminuer la formation de H2S, d'acide sulfurique biogène et/ou de mercaptans dans des systèmes de conduites de fluide
DE102015222486A1 (de) * 2015-11-13 2017-05-18 Raumedic Ag Neutralisations-Additiv
US10190152B2 (en) 2009-09-03 2019-01-29 Becton, Dickinson And Company Methods and compositions for direct chemical lysis
PL444151A1 (pl) * 2023-03-21 2024-09-23 Zeocomplex Spółka Z Ograniczoną Odpowiedzialnością Sposób redukcji związków złowonnych z gastronomii i hodowli z wykorzystaniem zeolitu naturalnego

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CA2032336C (fr) * 1989-12-15 1995-04-11 Kouichi Nakade Circulateur d'air
AU2020495A (en) * 1994-05-24 1995-11-30 American Colloid Company Extruded smectite clay clumping animal litter having improved clump strength

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CA2032336C (fr) * 1989-12-15 1995-04-11 Kouichi Nakade Circulateur d'air
AU2020495A (en) * 1994-05-24 1995-11-30 American Colloid Company Extruded smectite clay clumping animal litter having improved clump strength

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1325197A4 (fr) * 2000-09-13 2005-05-25 Sl Parkhurst Corp Dispositif d'elimination d'air vicie
EP1325197A1 (fr) * 2000-09-13 2003-07-09 SL Parkhurst Corporation Dispositif d'elimination d'air vicie
WO2004023998A1 (fr) * 2002-09-16 2004-03-25 Aerocrine Ab Epurateur
AU2003253542B2 (en) * 2002-09-16 2007-07-26 Aerocrine Ab Scrubber
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