WO2003047782A1 - Traitement des dechets devant etre elimines - Google Patents

Traitement des dechets devant etre elimines Download PDF

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Publication number
WO2003047782A1
WO2003047782A1 PCT/AU2002/001593 AU0201593W WO03047782A1 WO 2003047782 A1 WO2003047782 A1 WO 2003047782A1 AU 0201593 W AU0201593 W AU 0201593W WO 03047782 A1 WO03047782 A1 WO 03047782A1
Authority
WO
WIPO (PCT)
Prior art keywords
waste
mixer
hopper
hydroxide
shredding
Prior art date
Application number
PCT/AU2002/001593
Other languages
English (en)
Inventor
Michael Philip Summer-Pots
Richard John Curtis Lear
Original Assignee
Matrix Technology 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
Application filed by Matrix Technology Pty. Ltd filed Critical Matrix Technology Pty. Ltd
Priority to AU2002365612A priority Critical patent/AU2002365612A1/en
Publication of WO2003047782A1 publication Critical patent/WO2003047782A1/fr

Links

Classifications

    • 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
    • A61L11/00—Methods specially adapted for refuse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/0075—Disposal of medical waste
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

Definitions

  • This invention is concerned with the disposal of waste
  • hydrocarbons hydrocarbons, hydrogen chloride and dioxins.
  • Incinerators have very high maintenance requirements
  • waste product is generated which requires routine testing to determine
  • the end-product of steam treatment is not biologically or chemically inert
  • hydroxide and a cementitious binder comprising bentonite and sodium
  • the resultant disinfected mass contains greater than
  • a method for disposal of clinical waste materials comprising the steps of:- shredding a clinical waste material to obtain a finely divided
  • aqueous phase is returned to said waste material for
  • Clinical waste may include human tissue, such as hair, teeth,
  • plastic bags and scrap plastic generally, syringes, needles
  • said oxidising solution comprises a source of free
  • oxygen such as ozone, or a peroxide, a source of free halogens or oxy-
  • halogens such as chlorine, hypochlorites or other oxidants
  • the oxidising solution comprises hydrogen peroxide.
  • the particle size of the shredded waste is less than
  • the particle size of the shredded waste is less
  • said extracted alkaline aqueous phase is returned to said
  • said apparatus comprising:-
  • a mixer adapted to receive shredded waste material from said
  • invention further comprises a compression device for compressing the
  • said apparatus comprises a hopper feed
  • said hopper feed apparatus includes a meter to
  • the shredder may comprise any suitable device to reduce a
  • the shredder may comprise a two stage shredding
  • said shredder comprises, counter rotating knives
  • the shredder is in association with a filtration
  • the mixer suitably comprises a high shear mixer.
  • the mixer comprises a paddle type mixer.
  • the first meter and second meter are preferably coupled to
  • the discharge apparatus may comprise any suitable
  • the recirculator may comprise one or more holding tanks,
  • silicate act well to bind the cytotoxins and prevent them from being leached into landfill sites.
  • bentonite served partly to
  • silicate is added due to the variability of waste ingredients, as usual
  • waste and non-waste materials from the processing site to the landfill.
  • FIG 1 shows a schematic view of an apparatus for processing
  • FIG 2 shows schematically an electrical control circuit for the
  • FIG 3 shows schematically a materials flow chart.
  • the apparatus comprises a feed hopper 1
  • an elevation mechanism 4 Associated with feed hopper 1 is an elevation mechanism 4
  • the refuse bin(s) are between 80 to 1 1 00
  • Bin 5 for the purpose of elevation has a location
  • a weighing apparatus 6 such as a load cell platform or the like
  • bin 5 containing waste materials is elevated and the
  • bin(s) 5 is adapted to seal and engage the mouth of hopper 1 to ensure no spillage of contents from the bin(s) 5.
  • Hopper 1 provides a feed chute for a shredder 2. The outlet
  • port of the shredder 2 may be in communication with the inlet port or feed hopper of secondary shredder 2b.
  • Feed hopper 1 may comprise a hydraulically or pneumatically
  • the mouth of the hopper is
  • spray jets located within hopper 1 direct an oxidising solution
  • hopper 1 to disinfect and contain dust particles and/or aerosols from the
  • the hopper 1 is maintained at a
  • the filtration unit generally contains filters
  • HEPA Trade Mark
  • the oxidising solution is sprayed into the hopper 1 such that the droplet size is comparable to the particle size of the shredded waste.
  • Air atomising nozzles may also be present to assist in the droplet formation of the oxidising solution.
  • the extracted alkaline aqueous phase is
  • the shredder may be a two or four shaft rotary knife and hook shredder such as Untha RS50 (Trade Mark), or similar
  • the shredding apparatus may further comprise a primary
  • secondary shredders 2a and 2b comprise rotary knife and hook
  • oxidant spray may also be selectively directed into bin 5 to wash out the
  • the shredded wetted waste passes from the shredding apparatus 2
  • mixer is a conventional fine clearance twin rotating paddle unit or a unit with
  • the particulate treated waste material is particulate solid treated waste material.
  • FIG 2 shows schematically a control circuit from the
  • a microprocessor or programmable logic controller 17 is
  • Microprocessor 1 7 is
  • peroxide solution has a concentration of 0.1 -5% H2O2. Most preferably the
  • hydrogen peroxide solution has a concentration of 0.3-3% H 2 0 2 .
  • the shredder 2 in the form of small particles less than 40 mm in diameter
  • FIG 3 shows a schematic flow chart of the process in
  • the shredded waste is then introduced to a paddle mixer
  • a quantity of lime to be introduced to the mixer is
  • the treated waste then enters the dewatering press 12 and is dewatered prior to being
  • the discharged treated waste may be compressed in a
  • dewatering step is recycled to the hopper 1 and/or mixer 1 1 to start initial
  • the present invention is considered to be unique in that while
  • such material is not chemically inert and can discharge
  • i s shutdown procedures can be operated by one or two personnel and
  • droplet spray to disinfect the airborne particles and to prevent the
  • phase and HEPA filters remove additional dust and particles generated by
  • mixer feed conveyor 8 whereupon a quantity of calcium oxide is added.
  • Heating of the overall admixture is generally in the range of 60 to 85°C.
  • the treated mixture typically has a residence time of 5 to 10 minutes in the mixer 1 1 .
  • the waste is subsequently mechanically dewatered to
  • the aqueous discharge from the dewatering step may be
  • the filtrate may be discharged into the sewer or to an off site
  • CDHS guidelines are the most stringent in assessing the safety of a
  • yeasts spore forming bacteria and viruses, as well as bacteria which are
  • waste mixtures were tested for their microbiological content on exiting the process and 24 hours post treatment. The second occasion the waste mixtures were tested for their microbiological content on exiting the process and 1 hour post treatment.
  • waste mixtures used in the process included; routine medical waste with very low moisture; anatomical waste blended with routine medical waste with high moisture content; and quarantine waste with low moisture content.
  • the challenge microorganisms were prepared as freeze dried preparations into a 10% skim milk-base with organic yellow colourant added. On both test occasions, with the three waste types tested, the challenge inoculate were introduced to untreated waste, already with significant microbial population already present
  • Inocula were prepared by concentration and all testing was performed in duplicate with one replicate at a 'high' and the second at an 'extremely high' initial concentration
  • the 'high' inoculum comprised 1 0 kg of 10 8 /g inoculum per 100kg waste resulting in an initial inoculum level of 10 6 /g of waste material
  • the 'extremely high' inoculum comprised 1 0 kg of 10 /g inoculum per 100kg waste, resulting in an initial inoculum level of 10 9 /g of waste material
  • Table 1 Significant
  • Quarantine designated waste from AQIS. very low moisture
  • Waste material is treated according to the process of the
  • Samples B, F, M, U were measured at 10mm, 100mm and
  • Sample O was measured at 10 mm and 100mm
  • the pH was recorded using an EML pH meter EB1-5, a Schott Handilab 1 unit calibrated using certified pH buffers supplied by Amyl Australia. The pH was measured at sample locations B, K, M, U. The measurements are summarised below in Table 5.
  • the apparatus and method according to the invention provides an effective, economic means for treatment of wastes containing pathogenic organisms.
  • the chemical treatment processes are simple and easy to manage and the self contained apparatus are virtually fail safe in terms of operation.
  • the resultant disinfected product of the process of the invention disinfects the pathogenic microorganisms through the formation of an environment with a high pH.
  • the resultant pH is between 11 and 13.
  • the product of the process is non-pathogenic, odourless and spadable allowing for easy handling and disposal.
  • the process of the invention is safe to those people working in the area as it does not off gas vapour, the process is fully automated

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

La présente invention concerne un procédé et un appareil de traitement de déchets dans lesquels les déchets infectieux sont déchiquetés et broyés afin d'obtenir une matière particulaire finement divisée, les aérosols sont piégés à l'aide d'une solution oxydante, les déchets sont mouillés avec une solution alcaline aqueuse, les déchets sont traités avec un hydroxyde ou un oxyde alcalino-terreux, les déchets sont déshydratés pour récupérer les déchets déshydratés et le surplus de solution alcaline peut être réutilisé pour mouiller les déchets.
PCT/AU2002/001593 2001-12-05 2002-11-29 Traitement des dechets devant etre elimines WO2003047782A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002365612A AU2002365612A1 (en) 2001-12-05 2002-11-29 Treatment of waste materials for disposal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU97046/01A AU9704601A (en) 2001-12-05 2001-12-05 Treatment of waste materials for disposal
AU97046/01 2001-12-05

Publications (1)

Publication Number Publication Date
WO2003047782A1 true WO2003047782A1 (fr) 2003-06-12

Family

ID=3764369

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2002/001593 WO2003047782A1 (fr) 2001-12-05 2002-11-29 Traitement des dechets devant etre elimines

Country Status (2)

Country Link
AU (1) AU9704601A (fr)
WO (1) WO2003047782A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008053086A2 (fr) * 2006-10-27 2008-05-08 Michel Mazon Procede de traitement des ordures menageres
WO2012094454A3 (fr) * 2011-01-06 2013-10-24 Trinova Medical Waste Solutions, Llc Dispositif de collecte et d'élimination des déchets dangereux, procédés d'utilisation de ce dernier et applications associées
JP2013220131A (ja) * 2012-04-13 2013-10-28 Green:Kk 滅菌処理装置、及び、滅菌処理方法
WO2013160546A1 (fr) * 2012-04-24 2013-10-31 Pac-Solution Oy Procédé de désinfection d'une boue
EP3245016A4 (fr) * 2015-01-12 2018-12-05 Aemerge LLC Destruction de déchets infectieux

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108862791B (zh) * 2018-07-05 2021-05-07 深圳市东太盈科技有限公司 一种医疗废水处理装置
WO2023282850A2 (fr) 2021-07-08 2023-01-12 800 Super Waste Management Pte Ltd Procédé et appareil pour le traitement de déchets de déchets mélangés

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4578185A (en) * 1985-07-24 1986-03-25 Medical Safetec, Inc. Waste disposal system
US5568895A (en) * 1992-06-09 1996-10-29 Matrix Technology Pty. Ltd. Treatment of waste materials for disposal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4578185A (en) * 1985-07-24 1986-03-25 Medical Safetec, Inc. Waste disposal system
US5568895A (en) * 1992-06-09 1996-10-29 Matrix Technology Pty. Ltd. Treatment of waste materials for disposal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008053086A2 (fr) * 2006-10-27 2008-05-08 Michel Mazon Procede de traitement des ordures menageres
WO2008053086A3 (fr) * 2006-10-27 2008-07-03 Michel Mazon Procede de traitement des ordures menageres
US8858671B2 (en) 2006-10-27 2014-10-14 Michel Mazon Method for treating domestic waste
WO2012094454A3 (fr) * 2011-01-06 2013-10-24 Trinova Medical Waste Solutions, Llc Dispositif de collecte et d'élimination des déchets dangereux, procédés d'utilisation de ce dernier et applications associées
JP2013220131A (ja) * 2012-04-13 2013-10-28 Green:Kk 滅菌処理装置、及び、滅菌処理方法
WO2013160546A1 (fr) * 2012-04-24 2013-10-31 Pac-Solution Oy Procédé de désinfection d'une boue
EP3245016A4 (fr) * 2015-01-12 2018-12-05 Aemerge LLC Destruction de déchets infectieux

Also Published As

Publication number Publication date
AU9704601A (en) 2003-06-12

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