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WO1999066989A1 - Procede de traitement de dechets - Google Patents

Procede de traitement de dechets Download PDF

Info

Publication number
WO1999066989A1
WO1999066989A1 PCT/NL1999/000390 NL9900390W WO9966989A1 WO 1999066989 A1 WO1999066989 A1 WO 1999066989A1 NL 9900390 W NL9900390 W NL 9900390W WO 9966989 A1 WO9966989 A1 WO 9966989A1
Authority
WO
WIPO (PCT)
Prior art keywords
mono
waste
paste
phosphate
calcium hydroxide
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.)
Ceased
Application number
PCT/NL1999/000390
Other languages
English (en)
Inventor
Aldo Bennini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KIROR BV
Original Assignee
KIROR BV
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 KIROR BV filed Critical KIROR BV
Priority to AU46586/99A priority Critical patent/AU736283B2/en
Priority to PL99345201A priority patent/PL345201A1/xx
Publication of WO1999066989A1 publication Critical patent/WO1999066989A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • A62D3/36—Detoxification by using acid or alkaline reagents
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/20—Organic substances
    • A62D2101/24—Organic substances containing heavy metals
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/40—Inorganic substances
    • A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2203/00—Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
    • A62D2203/02—Combined processes involving two or more distinct steps covered by groups A62D3/10 - A62D3/40

Definitions

  • the present invention relates to a method for the treatment of waste contaminated with heavy metals and for rendering the latter inert. It is known that specific harmful and/or toxic materials which originate from various sources and which contain heavy metals, such as arsenic, cadmium, chromium, mercury, lead, selenium or tellurium, and which in a transfer test have the tendency to yield an eluate that does not comply with the acceptance limits that have been laid down, are stored in protected dumps for hazardous toxic waste.
  • heavy metals such as arsenic, cadmium, chromium, mercury, lead, selenium or tellurium
  • the interfering ions chlorides
  • the present invention is characterised in that the following steps are carried out: - determination of the acidity of the contaminated material, partial neutralisation of the material if the latter is acidic (pH between 0.5 and 3), the addition of a solution of orthophosphoric acid and an alkali metal salt thereof in water, forming a homogeneous paste from the mixture formed, - the addition of calcium oxide (CaO) and/or calcium hydroxide (Ca(OH) 2 ) to the paste, and allowing the paste to dry in the air.
  • steps are carried out: - determination of the acidity of the contaminated material, partial neutralisation of the material if the latter is acidic (pH between 0.5 and 3), the addition of a solution of orthophosphoric acid and an alkali metal salt thereof in water, forming a homogeneous paste from the mixture formed, - the addition of calcium oxide (CaO) and/or calcium hydroxide (Ca(OH) 2 ) to the paste, and allowing the paste to dry in the air.
  • CaO
  • the calcium hydroxide or the calcium oxide can be added in powder form in an amount of between 50 and 350 kg per tonne of waste to be rendered inert. Good results have been obtained with pulverulent calcium oxide or calcium hydroxide of the type that is suitable for building applications.
  • the concentrated aqueous solution of orthophosphoric acid and of the alkali metal salt thereof can be the commercially available "Fissa Met" solution for rendering inert, which contains orthophosphoric acid and mono-, di- and trisodium phosphate (NaH 2 PO 4 , Na 2 HPO 4 , Na 3 PO 4 ), mono-, di- and tripotassium phosphate (KH 2 PO 4 , K 2 HPO 4 , K 3 PO 4 ), or mono-, di- and tricalcium phosphate (CaHPO , Ca(H 2 PO 4 ) 2 , Ca 3 (PO 4 ) 2 ), in the anhydrous form or in the form of the hydrate and which is used in an amount of between 5 and 150 litres per tonne of waste to be rendered inert.
  • “Fissa Met” solution for rendering inert which contains orthophosphoric acid and mono-, di- and trisodium phosphate (NaH 2 PO 4 , Na 2 HPO 4 , Na 3
  • the method according to the present invention is highly versatile and can be used on waste from various sources, such as metal slags, demolition debris or scrap, ash from incinerators or solid industrial and inorganic chemical waste material from towns, special installations, hospitals, industry and the like.
  • the method according to the invention for rendering waste inert was used on fly ash originating from the incineration of waste from a hospital. This material was placed in a mixer. Calcium hydroxide (slaked lime) in an amount of 90 kg per tonne waste was added by pneumatic means from suitable silos simultaneously with 50 litres of the "Fissa Met" solution for rendering inert, which is a concentrated aqueous solution of orthophosphoric acid and of the disodium hydrogen salt thereof (disodium monohydrogen phosphate (Na 2 F£PO )), which was added from another container, together with just enough water to guarantee intimate contact of the mixture. The mixture had to remain in a stirrable composition and was stirred for several minutes.
  • the wet mixture was placed on a suitable surface so that said mixture was able to dry completely, or said mixture was dried immediately in a stream of hot air (where heat recovery was possible).

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

L'invention se rapporte à un procédé de traitement de déchets contaminés par des métaux lourds. Afin de rendre ces contaminants inertes, on procède aux étapes suivantes: détermination de l'acidité de la matière contaminée, neutralisation partielle de la matière si celle-ci est acide, adjonction d'une solution aqueuse contenant de l'acide orthophosphorique et un sel de métal alcalin de cet acide, formation d'une pâte homogène à partir du mélange résultant, adjonction à la pâte d'oxyde de calcium (CaO) et/ou d'hydroxyde de calcium (Ca(OH)2) et séchage à l'air de la pâte. La matière ainsi obtenue peut être stockée conformément à la législation locale sur l'environnement.
PCT/NL1999/000390 1998-06-25 1999-06-24 Procede de traitement de dechets Ceased WO1999066989A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU46586/99A AU736283B2 (en) 1998-06-25 1999-06-24 Method for the treatment of waste
PL99345201A PL345201A1 (en) 1998-06-25 1999-06-24 Method for the treatment of waste

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1009490A NL1009490C8 (nl) 1998-06-25 1998-06-25 Werkwijze voor het behandelen van afvalstoffen.
NL1009490 1998-06-25

Publications (1)

Publication Number Publication Date
WO1999066989A1 true WO1999066989A1 (fr) 1999-12-29

Family

ID=19767373

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1999/000390 Ceased WO1999066989A1 (fr) 1998-06-25 1999-06-24 Procede de traitement de dechets

Country Status (5)

Country Link
AU (1) AU736283B2 (fr)
NL (1) NL1009490C8 (fr)
PL (1) PL345201A1 (fr)
RU (1) RU2203709C2 (fr)
WO (1) WO1999066989A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044326A1 (de) * 2000-09-07 2002-04-04 Grillo Werke Ag Verfahren zur Reduzierung der Restlöslichkeit von bleihaltigen Schlämmen und sonstigen Rückständen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737356A (en) * 1985-11-18 1988-04-12 Wheelabrator Environmental Systems Inc. Immobilization of lead and cadmium in solid residues from the combustion of refuse using lime and phosphate
EP0568903A1 (fr) * 1992-04-27 1993-11-10 SAMAG MASCHINENFABRIK SANGERSHAUSEN GmbH i.K. Procédé pour le traitement des matériaux contenant des métaux lourds
DE4217133A1 (de) * 1992-05-23 1993-11-25 Asea Brown Boveri Verfahren zum Entfernen von Chloriden, Schwermetallen und deren Salzen aus Stäuben und Schlacken
GB2277515A (en) * 1993-03-15 1994-11-02 Sevenson Environmental Service Treating metal-bearing waste
WO1997031874A1 (fr) * 1996-02-28 1997-09-04 Solvay (Societe Anonyme) Procede d'inertage de cendres

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3851832T2 (de) * 1988-03-31 1995-02-09 Wheelabrator Environment Syst Immobilisierung von Blei und Kadmium in den Rückständen der Abfallverbrennung durch Gebrauch von Kalk und Phosphat.
US5037479A (en) * 1990-04-20 1991-08-06 Rmt, Inc. Method for reduction of heavy metal leaching from hazardous waste under acidic and nonacidic conditions
GB9124353D0 (en) * 1991-11-15 1992-01-08 Albright & Wilson Immobilisation of metal contaminants from a liquid to a solid metal
DE4230223A1 (de) * 1992-09-10 1994-03-17 Hoechst Ag Verfahren und Anlage zum Entfernen von Blei, Cadmium und Zink aus Stäuben
EP0800871A4 (fr) * 1994-12-28 1998-05-06 Kanegafuchi Chemical Ind Materiau pour mise au rebut de dechets et procede d'utilisation dudit materiau

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737356A (en) * 1985-11-18 1988-04-12 Wheelabrator Environmental Systems Inc. Immobilization of lead and cadmium in solid residues from the combustion of refuse using lime and phosphate
EP0568903A1 (fr) * 1992-04-27 1993-11-10 SAMAG MASCHINENFABRIK SANGERSHAUSEN GmbH i.K. Procédé pour le traitement des matériaux contenant des métaux lourds
DE4217133A1 (de) * 1992-05-23 1993-11-25 Asea Brown Boveri Verfahren zum Entfernen von Chloriden, Schwermetallen und deren Salzen aus Stäuben und Schlacken
GB2277515A (en) * 1993-03-15 1994-11-02 Sevenson Environmental Service Treating metal-bearing waste
WO1997031874A1 (fr) * 1996-02-28 1997-09-04 Solvay (Societe Anonyme) Procede d'inertage de cendres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044326A1 (de) * 2000-09-07 2002-04-04 Grillo Werke Ag Verfahren zur Reduzierung der Restlöslichkeit von bleihaltigen Schlämmen und sonstigen Rückständen
DE10044326B4 (de) * 2000-09-07 2004-04-22 Grillo-Werke Ag Verfahren zur Reduzierung der Restlöslichkeit von bleihaltigen Schlämmen und sonstigen Rückständen

Also Published As

Publication number Publication date
AU736283B2 (en) 2001-07-26
PL345201A1 (en) 2001-12-03
NL1009490C2 (nl) 2000-01-04
RU2203709C2 (ru) 2003-05-10
NL1009490C8 (nl) 2002-12-05
AU4658699A (en) 2000-01-10

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