EP0842123A1 - Process for the biological decontamination of contaminated material - Google Patents

Process for the biological decontamination of contaminated material

Info

Publication number
EP0842123A1
EP0842123A1 EP96927524A EP96927524A EP0842123A1 EP 0842123 A1 EP0842123 A1 EP 0842123A1 EP 96927524 A EP96927524 A EP 96927524A EP 96927524 A EP96927524 A EP 96927524A EP 0842123 A1 EP0842123 A1 EP 0842123A1
Authority
EP
European Patent Office
Prior art keywords
contaminated
contaminated material
decontamination
activated sludge
sludge
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.)
Withdrawn
Application number
EP96927524A
Other languages
German (de)
French (fr)
Inventor
Helmut Prof. Dipl.-Ing. Hohnecker
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0842123A1 publication Critical patent/EP0842123A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C02F11/004—Sludge detoxification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • 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
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention is based on a method for biological decontamination according to the preamble of the main claim and the preamble of claim 3.
  • the contaminated material is cleaned and processed by means of microorganisms, the microorganisms originating from activated sludge of anaerobic and aerobic type and made available by mixing the contaminated material with this activated sludge and, if necessary is treated further.
  • the microorganisms break down the impurities and, if necessary, are increased by added nutrients, supported by stirring, water supply and last but not least aeration.
  • This known method is used primarily in soils contaminated with petroleum products. In such soils there can be some toxic metal compounds which can be in a form accessible to microorganisms and can be bound by the known method.
  • the metals remain in the landfill area of the goods, they are suitable for entering into new toxic compounds.
  • the consistency of the mixture of contaminated material and sewage sludge is chosen so that it maintains the shape.
  • the very broad spectrum of waste or residual materials resulting from sewage sludge or the like activated sludge contains a microorganism flora which can process almost all biodegradable contaminants.
  • the contaminated goods are usually soils contaminated with petroleum products. Others, for example soils contaminated with heavy metals, have to be brought to special landfills, similar to mixed-contaminated soils of industrial or settlement areas, which is not only expensive, but also represents a postponement of the problem of treating such soils.
  • the method according to the invention or the device according to the invention with the characterizing features of the main claim or claim 3 has the advantage that whenever there are biodegradable substances in the soils or residues from settlement areas and industrial areas, for example petroleum-containing substances, these can be broken down via the microorganisms in the sewage sludge, whereby it has been found that other organic pollutants are also processed by the microorganisms. It was surprisingly found that in many apparently non-decontaminable substances by removing the Petroleum product compositions the residual material is no longer regarded as contaminated despite the presence of metals, for example metal chips and the like. Existing metal is also removed from such a residual material before it enters into compounds with other substances, which in turn is considered to be toxic and would then have to be stored in special landfills. The inventive method saves high costs for hazardous waste landfills.
  • industrial grinding sludge serves as the contaminated material.
  • Such grinding sludges are usually highly oil-containing, so that after the oil has been removed via the microorganisms, substances remain which in the case are easy to dispose of or can be recycled. These primarily include the metals separated from oil compounds.
  • the treatment can take place in a closed system which contains an agitator, pump and air supply devices and which are preceded by separating, sorting and classifying devices (for example flotation, Me separator, belts, etc.) .
  • separating, sorting and classifying devices for example flotation, Me separator, belts, etc.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A process is disclosed for the decontamination of wastes or residues from residential and industrial areas, e.g. industrial sludges. The metal-containing materials are mixed with activated sludge, e.g. sewage sludge, and the reaction product undergoes further processing, the metal component being recyclable.

Description

Verfahren zur biologischen Dekontaminierung v o n verunreinigtem GutProcess for the biological decontamination of contaminated goods
Die Erfindung geht aus von einem Verfahren zur biologischen Dekontaminierung nach der Gattung des Hauptanspruchsund des Oberbegriffs von Anspruch 3.The invention is based on a method for biological decontamination according to the preamble of the main claim and the preamble of claim 3.
Bei einem bekannten gattungsgemäßen Verfahren dieser Art (EP 0 486 578) erfolgt die Reinigung und Aufbereitung des verunreinigten Guts mittels Mikroorganismen, wobei die Mikroorganismen aus Belebtschlämmen anaerober und aerober Art entstammen und zur Verfügung gestellt werden, indem das verunreinigte Gut mit diesem Belebtschlamm vermischt und erforderlichenfalls weiter behandelt wird. Die Mikroorganismen bauen die Verunreinigungen ab und werden erforderlichenfalls durch zugeführte Nährstoffe vermehrt, unterstützt durch Rührverfahren, Wasserzuführung und nicht zuletzt Belüftungsverfahren. Dieses bekannte Verfahren wird vor allem bei durch Erdölprodukte verseuchte Böden eingesetzt. In solchen Böden können manche giftigen Metallverbindungen vorhanden sein, die in für Mikroorganismen zugänglicher Form vorliegen können und über das bekannte Verfahren gebunden werden können. Da die Metalle aber im Deponieraum des Gutes verbleiben, sind sie geeignet neue giftige Verbindungen einzugehen. In einer diesbezüglichen Weiterentwicklung des Verfahrens (DE-OS 4339875) wird vor allem die Konsistenz des Gemisches aus verunreinigtem Gut und Klärschlämmen so gewählt, daß diese formerhaltend ist. In jedem Fall enthält das sehr breite Spektrum der bei Klärschlämmen oder dergleichen Belebtschlämmen anfallenden Abfall- bzw. Reststoffe eine Mikroorganismenflora, die nahezu alle biologisch abbaubaren Verunreinigungen verarbeiten kann. Bei dem verunreinigten Gut handelt es sich üblicherweise um von Erdölprodukten verseuchte Böden. Andere, beispielsweise mit Schwermetallen kontaminierte Böden, müssen auf Sonderdeponien gebracht werden, ähnlich wie mischkontaminierte Böden von Industrieflächen oder Siedlungsflächen, was nicht nur teuer ist, sondern auch eine Vertagung des Problems der Behandlung solcher Böden darstellt.In a known generic method of this type (EP 0 486 578), the contaminated material is cleaned and processed by means of microorganisms, the microorganisms originating from activated sludge of anaerobic and aerobic type and made available by mixing the contaminated material with this activated sludge and, if necessary is treated further. The microorganisms break down the impurities and, if necessary, are increased by added nutrients, supported by stirring, water supply and last but not least aeration. This known method is used primarily in soils contaminated with petroleum products. In such soils there can be some toxic metal compounds which can be in a form accessible to microorganisms and can be bound by the known method. However, since the metals remain in the landfill area of the goods, they are suitable for entering into new toxic compounds. In a related further development of the method (DE-OS 4339875), the consistency of the mixture of contaminated material and sewage sludge is chosen so that it maintains the shape. In any case, the very broad spectrum of waste or residual materials resulting from sewage sludge or the like activated sludge contains a microorganism flora which can process almost all biodegradable contaminants. The contaminated goods are usually soils contaminated with petroleum products. Others, for example soils contaminated with heavy metals, have to be brought to special landfills, similar to mixed-contaminated soils of industrial or settlement areas, which is not only expensive, but also represents a postponement of the problem of treating such soils.
Bei einem anderen bekannten Verfahren (DE-OS 41 17 515) werden die mit Schwermetallen und organischen Schadstoffen belasteten Feinstkornböden in sehr aufwendiger Weise mit biologisch umsetzbaren Säuren und Säuregemischen gelangt, sowie beispielsweise Salpetersäure.In another known method (DE-OS 41 17 515), the fine grain soils contaminated with heavy metals and organic pollutants are obtained in a very complex manner with biologically convertible acids and acid mixtures, and for example nitric acid.
Das erfindungsgemäße Verfahren bzw. die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs bzw. des Anspruchs 3 hat demgegenüber den Vorteil, daß immer dann, wenn auch biologisch abbaubare Substanzen in den Böden oder Reststoffen aus Siedlungsflächen und Industrieflächen vorhanden sind, beispielsweise erdölhaltige Substanzen, diese über die im Klärschlamm befindlichen Mikroorganismen abgebaut werden können, wobei sich herausgestellt hat, daß auch andere organische Schadstoffe von den Mikroorganismen verarbeitet werden. Hierbei stellte sich überraschenderweise heraus, daß in vielen scheinbar nicht dekontaminierbaren Substanzen durch die Entfernung der Erdölproduktkompositionen das Restgut trotz Aufweisens von Metallen beispielsweise Metallspänen und dergleichen nicht mehr als kontaminiert angesehen wird. Aus einem solchen Restgut wird auch vorhandenes Metall entfernt, bevor es mit anderen Stoffen Verbindungen eingeht, und dadurch wiederum als giftig gilt, also dann auf Sonderdeponien gelagert werden müßte. Durch das erfinderische Verfahren werden hohe Kosten für Sondermülldeponien gespart.The method according to the invention or the device according to the invention with the characterizing features of the main claim or claim 3 has the advantage that whenever there are biodegradable substances in the soils or residues from settlement areas and industrial areas, for example petroleum-containing substances, these can be broken down via the microorganisms in the sewage sludge, whereby it has been found that other organic pollutants are also processed by the microorganisms. It was surprisingly found that in many apparently non-decontaminable substances by removing the Petroleum product compositions the residual material is no longer regarded as contaminated despite the presence of metals, for example metal chips and the like. Existing metal is also removed from such a residual material before it enters into compounds with other substances, which in turn is considered to be toxic and would then have to be stored in special landfills. The inventive method saves high costs for hazardous waste landfills.
Nach einer vorteilhaften Ausgestaltung der Erfindung dient als verunreinigtes Gut industrieller Schleifschlamm. Derartige Schleifschlämme sind meist stark ölhaltig, so daß nach Entfernung des Öls über die Mikroorganismen Substanzen übrig bleiben, die in dem Falle einfach zu entsorgen oder aber einer Wiederverwertung zuführbar sind. Hierzu gehören vor allem die aus Ölverbindungen getrennten Metalle.According to an advantageous embodiment of the invention, industrial grinding sludge serves as the contaminated material. Such grinding sludges are usually highly oil-containing, so that after the oil has been removed via the microorganisms, substances remain which in the case are easy to dispose of or can be recycled. These primarily include the metals separated from oil compounds.
Nach der eine Vorrichtung betreffenden vorteilhaften Ausgestaltung der Erfindung kann die Behandlung in einem geschlossenen System erfolgen, das ein Rührwerk, Pumpen- und Luftzuführungseinrichtungen enthält und dem Abscheide-, Sortier- und Klassierungseinrichtungen vorgeschaltet sind ( z.B. Flotation, Me-Abscheider, Bänder etc. ).According to the advantageous embodiment of the invention relating to a device, the treatment can take place in a closed system which contains an agitator, pump and air supply devices and which are preceded by separating, sorting and classifying devices (for example flotation, Me separator, belts, etc.) .
Alle der Beschreibung, den Ansprüchen und der Zeichnung entnehmbaren Merkmale können sowohl einzeln als auch in beliebiger Kombination miteinander erfindungswesentlich sein. All the features that can be gathered from the description, the claims and the drawing can be essential to the invention both individually and in any combination with one another.

Claims

Ansprüche Expectations
1. Verfahren zur biologischen Dekontaminierung von mit abbaubaren organischen Substanzen verunreinigtem Gut mittels dem verunreinigten Gut zugegebenen aerobe oder anaerobe Eigenschaften aufweisenden Belebtschlämmen aus Kläranlagen oder dergleichen, dadurch gekennzeichnet,1. A method for the biological decontamination of material contaminated with degradable organic substances by means of activated sludges from sewage treatment plants or the like which have aerobic or anaerobic properties added to the contaminated material, characterized in that
- daß das verunreinigte Gut Metallverbindungen enthält,- that the contaminated material contains metal compounds,
- daß das verunreinigte Gut eine Vorbehandlung erfährt, wie Zerkleinern, Sieben, Klassieren,- that the contaminated material undergoes pretreatment, such as crushing, sieving, classifying,
- daß das verunreinigte Gut mit dem Belebtschlamm vermischt und mit Flüssigkeit und/oder Temperatur und/oder Luft behandelt wird und daß nach der Dekontaminierung die Metallverbindungen separiert und recycelt werden.- That the contaminated material is mixed with the activated sludge and treated with liquid and / or temperature and / or air and that after decontamination, the metal compounds are separated and recycled.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als verunreinigtes Gut industrieller Schleifschlamm dient.2. The method according to claim 1, characterized in that industrial grinding sludge serves as contaminated material.
3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Reaktionsgut, nämlich Belebtschlamm und verunreinigtes Gut, in einen ein geschlossenes System bildenden Behälter füllbar ist, der ein Rührwerk, und/oder eine Heizanlage und/oder eine Belüftungsanlage zur Unterlüftung des Reaktionsgutes aufweist. 3. Device for performing the method according to claim 1 or 2, characterized in that the reaction material, namely activated sludge and contaminated material, can be filled in a container forming a closed system, which has an agitator, and / or a heating system and / or a ventilation system to ventilate the reaction material.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß dem Behälter Abscheide-, Sortier- und/oder Klassierungseinrichtungen vorgeschaltet sind. 4. The device according to claim 3, characterized in that the container separating, sorting and / or classifying devices are connected upstream.
EP96927524A 1995-07-27 1996-07-29 Process for the biological decontamination of contaminated material Withdrawn EP0842123A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19527385 1995-07-27
DE19527385 1995-07-27
PCT/DE1996/001406 WO1997005071A1 (en) 1995-07-27 1996-07-29 Process for the biological decontamination of contaminated material

Publications (1)

Publication Number Publication Date
EP0842123A1 true EP0842123A1 (en) 1998-05-20

Family

ID=7767877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96927524A Withdrawn EP0842123A1 (en) 1995-07-27 1996-07-29 Process for the biological decontamination of contaminated material

Country Status (6)

Country Link
EP (1) EP0842123A1 (en)
CZ (1) CZ22598A3 (en)
DE (1) DE19630370A1 (en)
HU (1) HUP9802370A2 (en)
PL (1) PL324619A1 (en)
WO (1) WO1997005071A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398069B (en) * 2003-02-05 2005-08-31 Hanson Support Services Ltd Treatment of ferrous waste
CN111423095B (en) * 2020-03-05 2022-04-08 厦门大学 Method for treating residual activated sludge

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277342A (en) * 1979-10-01 1981-07-07 Cornell Research Foundation, Inc. Combined biological-chemical detoxification of organics
DE3821242A1 (en) * 1988-06-23 1989-12-28 Antonio M Dipl Ing Celi METHOD AND DEVICE FOR PROCESSING METAL-LOADED WASTE SLUDGE
US5204001A (en) * 1991-10-09 1993-04-20 Zenon Environmental Inc. Membrane bioreactor system for treating synthetic metal-working fluids and oil-based products
DE4339875A1 (en) * 1993-11-23 1995-05-24 Hohnecker Helmut Process for cleaning and processing contaminated goods
EP0792196B1 (en) * 1994-08-09 1998-11-04 Hege Terdesan GmbH & Co. KG. Method of decontaminating contaminated material and devices therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9705071A1 *

Also Published As

Publication number Publication date
CZ22598A3 (en) 1998-10-14
WO1997005071A1 (en) 1997-02-13
DE19630370A1 (en) 1997-03-06
PL324619A1 (en) 1998-06-08
HUP9802370A2 (en) 1999-01-28

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