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)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7767877

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Citations (5)

• 1996
  • 1996-07-29 CZ CZ98225A patent/CZ22598A3/cs unknown
  • 1996-07-29 EP EP96927524A patent/EP0842123A1/de not_active Withdrawn
  • 1996-07-29 PL PL32461996A patent/PL324619A1/xx unknown
  • 1996-07-29 HU HU9802370A patent/HUP9802370A2/hu unknown
  • 1996-07-29 DE DE1996130370 patent/DE19630370A1/de not_active Withdrawn
  • 1996-07-29 WO PCT/DE1996/001406 patent/WO1997005071A1/de not_active Ceased

Patent Citations (5)

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