WO1995004153A1 - Procede et systeme de traitement biologique de dechets - Google Patents

Procede et systeme de traitement biologique de dechets Download PDF

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Publication number
WO1995004153A1
WO1995004153A1 PCT/NL1994/000166 NL9400166W WO9504153A1 WO 1995004153 A1 WO1995004153 A1 WO 1995004153A1 NL 9400166 W NL9400166 W NL 9400166W WO 9504153 A1 WO9504153 A1 WO 9504153A1
Authority
WO
WIPO (PCT)
Prior art keywords
stream
slurry
waste
high concentration
fraction
Prior art date
Application number
PCT/NL1994/000166
Other languages
English (en)
Inventor
Sjoerd Hubertus Jozef Vellinga
Jan Brinkman
Original Assignee
Paques B.V.
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 Paques B.V. filed Critical Paques B.V.
Priority to AU75092/94A priority Critical patent/AU7509294A/en
Priority to DE4495582T priority patent/DE4495582T1/de
Publication of WO1995004153A1 publication Critical patent/WO1995004153A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F9/00—Fertilisers from household or town refuse
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/40—Treatment of liquids or slurries
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y02P20/145—Feedstock the feedstock being materials of biological origin
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Definitions

  • the invention relates to a method for the biological treatment of waste, comprising the processes of hydrolysing the waste, separating the hydrolysed material stream, by screening, into a relatively coarse organic fraction to be discharged and having particles larger than x, where x has a value between 1 and 5 mm. and a slurry stream having particles smaller than x, and converting dissolved organic components, by means of anaerobic fermentation, into biogas.
  • a method for the biological treatment of waste comprising the processes of hydrolysing the waste, separating the hydrolysed material stream, by screening, into a relatively coarse organic fraction to be discharged and having particles larger than x, where x has a value between 1 and 5 mm. and a slurry stream having particles smaller than x, and converting dissolved organic components, by means of anaerobic fermentation, into biogas.
  • the object of the invention is to overcome these drawbacks, to which end it is proposed, in the first instance, that the said slurry stream has the sand fraction between 2 and 1000 ⁇ separated therefrom and then, that the slurry stream which remains after removal of the sand fraction is separated into a stream having a high concentration of solid fine organic material and clay-like constituents and a water stream containing mainly dissolved organic components which are purified anaerobically in a bioreactor.
  • the removal of sand preferably takes place in a hydrocyclone.
  • the removed sand can be reprocessed to give a reusable quality.
  • the waste remaining after removal of sand has been considerably reduced in weight. This leads to cost savings in the remaining processes.
  • the wear on the equipment will likewise be considerably reduced.
  • the step of separating into a stream having a high concentration of solid fine organic material and clay-like constituents and a stream, to be passed to the bioreactor end containing dissolved organic components is preferably carried out in a decanter centrifuge, providing the option of avoiding the use of chemicals, which is of great advantage for further processing.
  • the stream obtained having a high concentration of solid fine organic material and clay-like constituents is subjected to dewatering and secondary composting. Another possibility is that of subjecting this stream to further treatment in a RUDAD reactor.
  • the invention also relates to a system for the biological treatment of waste, comprising: a reactor for hydrolysing the waste, a screen installation for separating the hydrolysed material into a fraction larger than x, where x has a value between 1 and 5 mm, and a slurry containing a fraction smaller than x, and an anaerobic purification reactor for converting organic constituents dissolved in the slurry into biogas.
  • the system is provided with a hydrocyclone for removing from the slurry the sand fraction between 2 and 1000 ⁇ and also with a decanter centrifuge for separating the slurry into a stream having a high concentration of solid fine organic material and a stream containing mainly dissolved organic components.
  • the material having a high concentration of solid fine organic material which is produced by the decanter centrifuge, can be subjected to further treatment.
  • Another possibility is the use of a RUDAD reactor for breaking down substances not readily degradable (especially cellulose fibres) .
  • the invention will now be explained in more detail with reference to the flow sheet. A number of recirculation streams and bypass streams are not shown.
  • admixture of air will suppress the formation of methane in the PRETHANE reactor, so that said formation of methane can take place subsequently in the UASB reactor under safe and controlled conditions.
  • the temperature is maintained at 37 * 3°C, by means of a warm-water system.
  • the pH is maintained between 5 and 6.5.
  • the solids content between and 10%.
  • the hydraulic retention time will be between 1 and 2 days.
  • the retention time of the solids may vary between 2 and 5 days.
  • the hydrolysed material is conveyed to the rotary screen 3 where it undergoes dewatering.
  • the rotating rotary drum has a pore size between 1 and 5 mm, preferably between 2.5 and 3-5 mm.
  • the fermenting mass from the PRETHANE reactor is separated, in the rotary drum, into a coarse organic fraction (coarse fibrous material) which may either be fermented further in the PRETHANE or RUDAD reactor or is dewatered mechanically and may then be subjected to secondary composting, and a slurry stream containing only small particles.
  • This lastmentioned slurry stream containing small particles still contains fine sand, clay and organic material.
  • dewatering takes place from 5-10% solids content in the incoming stream to ⁇ 13% in the stream of solid particles.
  • This stream of solid particles can be further dewatered in the screw press 4, prior to the aerobic composting.
  • the stream of solid particles can be dewatered to give ⁇ 55 of dry matter.
  • Downstream of the screw press there may be, for example, a belt conveyor which passes the material to the aerobic composting installation.
  • the liquid stream which still contains fine sand, clay and organic material is passed to the hydrocyclone 5 where the sand is separated. This separated sand is reprocessed in the installation 6. This reprocessed sand can be separated in a clean, reusable form.
  • the slurry stream which flows from the hydrocyclone and from which the sand fraction has been removed, is pumped to the decanter centrifuge 7• This stream is separated therein into a water stream containing virtually only dissolved components which are conveyed to the anaerobic water purification installation 9. and a stream with a high concentration of fine organic material and clay ⁇ like substances which may be further processed in a system 8. This may consist of a PRETHANE or RUDAD fermentation reactor, a mechanical dewatering installation and/or a drying-composting installation.
  • the stream containing dissolved components is processed to give pure water and biogas.
  • the fermented residue contains such large amounts of contaminants (metals, organic microcontaminants, plastics) that it cannot and must not be used as a compost. It will therefore have to be dumped, or after incineration the residue has to be dumped.
  • the sand can be separated in a clean form and thus need not be dumped.
  • VFG Vegetable, Fruit and Garden waste 25,000 tonnes of VFG

Abstract

Procédé de traitement biologique de déchets consistant à hydrolyser les déchets (1), à séparer par tamisage (3) le flux de matières hydrolysées, en une fraction organique à particules relativement grosses devant être déchargée, et en une suspension épaisse à particules fines en écoulement, et à transformer en biogaz les constituants organiques dissous, par fermentation anaérobie (9). Selon le procédé, on sépare (7) de ladite suspension épaisse en écoulement une fraction de sable (5) comprise entre 2 et 1000 ν, puis on partage ladite suspension en un flux renfermant une forte concentration de matières organiques fines et solides et de constituants argileux (8), et en un flux aqueux renfermant principalement des constituants organiques dissous que l'on purifie par voie anaérobie dans un bioréacteur (9).
PCT/NL1994/000166 1993-07-30 1994-07-15 Procede et systeme de traitement biologique de dechets WO1995004153A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU75092/94A AU7509294A (en) 1993-07-30 1994-07-15 Method and system for the biological treatment of waste
DE4495582T DE4495582T1 (de) 1993-07-30 1994-07-15 Verfahren und Anlage zur biologischen Abfallaufbereitung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9301341A NL9301341A (nl) 1993-07-30 1993-07-30 Werkwijze en inrichting voor de biologische behandeling van afvalstoffen.
NL9301341 1993-07-30

Publications (1)

Publication Number Publication Date
WO1995004153A1 true WO1995004153A1 (fr) 1995-02-09

Family

ID=19862719

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1994/000166 WO1995004153A1 (fr) 1993-07-30 1994-07-15 Procede et systeme de traitement biologique de dechets

Country Status (5)

Country Link
AU (1) AU7509294A (fr)
DE (1) DE4495582T1 (fr)
MX (1) MX9405799A (fr)
NL (1) NL9301341A (fr)
WO (1) WO1995004153A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0753495A2 (fr) * 1995-07-11 1997-01-15 Valorga Process Procédé de production d'un amendement organique stabilisé, et installation pour la mise en oeuvre de ce procédé
WO1997034851A1 (fr) * 1996-03-15 1997-09-25 Biophil Gmbh Gesellschaft Für Biotechnologie, Energie- Und Umwelttechnik Gmbh Procede et installation de valorisation de dechets organiques et nouvelle installation de biogaz appropriee
EP0866042A2 (fr) * 1997-03-19 1998-09-23 Lurgi Entsorgungstechnik GmbH Procédé de traitement des déchets biologiques
GB2329894A (en) * 1997-10-01 1999-04-07 Sobegina Trading Limited Treatment of city's common waste to produce organic fertilisers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19745896A1 (de) * 1997-10-17 1999-04-22 Babcock Anlagen Gmbh Verfahren und Vorrichtung zur Aufbereitung von Abfall

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142873A1 (fr) * 1983-09-09 1985-05-29 Gist-Brocades N.V. Procédé et appareil pour la fermentation anaérobique de déchets solides en milieu aqueux en deux étapes
DE3614865A1 (de) * 1986-05-02 1987-11-05 Kraemer Paul Vorrichtung zur schlammaufbereitung
EP0567184A1 (fr) * 1992-04-24 1993-10-27 N.V. Vuilafvoer Maatschappij Vam Méthode de traitement des déchets de légumes, de fruits et d'autres produits de jardin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142873A1 (fr) * 1983-09-09 1985-05-29 Gist-Brocades N.V. Procédé et appareil pour la fermentation anaérobique de déchets solides en milieu aqueux en deux étapes
DE3614865A1 (de) * 1986-05-02 1987-11-05 Kraemer Paul Vorrichtung zur schlammaufbereitung
EP0567184A1 (fr) * 1992-04-24 1993-10-27 N.V. Vuilafvoer Maatschappij Vam Méthode de traitement des déchets de légumes, de fruits et d'autres produits de jardin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DIETER SCHLAG ET AL.: "BETRIEBSANLAGEN ZUR VERGÄRUNG VON ABFÄLLEN", MÜLL UND ABFALL, vol. 25, no. 8, August 1993 (1993-08-01), BERLIN DE, pages 599 - 609 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0753495A2 (fr) * 1995-07-11 1997-01-15 Valorga Process Procédé de production d'un amendement organique stabilisé, et installation pour la mise en oeuvre de ce procédé
FR2736633A1 (fr) * 1995-07-11 1997-01-17 Valorga Process Sa Procede de production d'un amendement organique stabilise de haute qualite, et installation pour la mise en oeuvre de ce procede
EP0753495A3 (fr) * 1995-07-11 1997-02-12 Valorga Process Sa
WO1997034851A1 (fr) * 1996-03-15 1997-09-25 Biophil Gmbh Gesellschaft Für Biotechnologie, Energie- Und Umwelttechnik Gmbh Procede et installation de valorisation de dechets organiques et nouvelle installation de biogaz appropriee
EP0866042A2 (fr) * 1997-03-19 1998-09-23 Lurgi Entsorgungstechnik GmbH Procédé de traitement des déchets biologiques
EP0866042A3 (fr) * 1997-03-19 1999-05-06 Lurgi Entsorgungstechnik GmbH Procédé de traitement des déchets biologiques
GB2329894A (en) * 1997-10-01 1999-04-07 Sobegina Trading Limited Treatment of city's common waste to produce organic fertilisers
GB2329894B (en) * 1997-10-01 2000-09-06 Sobegina Trading Limited A method for the treatment of city's common waste to produce organic fertilisers

Also Published As

Publication number Publication date
NL9301341A (nl) 1995-02-16
DE4495582T1 (de) 1996-08-22
AU7509294A (en) 1995-02-28
MX9405799A (es) 1995-01-31

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