DE4329005A1 - Stabilisation of organic pollutant deposits in soil - by controlled addn. of nutrients or microorganisms to surrounding soil - Google Patents
Stabilisation of organic pollutant deposits in soil - by controlled addn. of nutrients or microorganisms to surrounding soilInfo
- Publication number
- DE4329005A1 DE4329005A1 DE4329005A DE4329005A DE4329005A1 DE 4329005 A1 DE4329005 A1 DE 4329005A1 DE 4329005 A DE4329005 A DE 4329005A DE 4329005 A DE4329005 A DE 4329005A DE 4329005 A1 DE4329005 A1 DE 4329005A1
- Authority
- DE
- Germany
- Prior art keywords
- soil
- microorganisms
- deposits
- substances
- nutrients
- 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- Withdrawn
Links
- 244000005700 microbiome Species 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 title claims abstract description 23
- 235000015097 nutrients Nutrition 0.000 title claims abstract description 10
- 230000006641 stabilisation Effects 0.000 title abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 title abstract 2
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 8
- 231100000719 pollutant Toxicity 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 3
- 239000011573 trace mineral Substances 0.000 claims description 3
- 235000013619 trace mineral Nutrition 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims 2
- 230000011664 signaling Effects 0.000 claims 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 abstract description 5
- 239000002480 mineral oil Substances 0.000 abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 3
- 235000010446 mineral oil Nutrition 0.000 abstract description 3
- 229930195733 hydrocarbon Natural products 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract 2
- 230000000593 degrading effect Effects 0.000 abstract 1
- 238000009629 microbiological culture Methods 0.000 abstract 1
- 230000005012 migration Effects 0.000 abstract 1
- 238000013508 migration Methods 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 description 9
- 238000011109 contamination Methods 0.000 description 7
- 230000000975 bioactive effect Effects 0.000 description 5
- 238000009418 renovation Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001888 Peptone Substances 0.000 description 1
- 108010080698 Peptones Proteins 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000589516 Pseudomonas Species 0.000 description 1
- 241000589776 Pseudomonas putida Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229940041514 candida albicans extract Drugs 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 235000019319 peptone Nutrition 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000004476 plant protection product Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Biotechnology (AREA)
- Zoology (AREA)
- General Health & Medical Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Genetics & Genomics (AREA)
- Microbiology (AREA)
- Mycology (AREA)
- Biomedical Technology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- Virology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Stabilisierung von kompakten Ablagerungen von Schadstoffen organischer Natur im Boden. Sie betrifft insbesondere die gefahrlose Konservierung nicht oder nicht sofort aus dem Boden entfernbarer Altlasten sowie die Deponierung nicht oder nicht wirtschaftlich abbaubarer Stoffe. Anwendungsgebiet der Erfindung ist der Umweltschutz.The invention relates to a method for stabilizing compact deposits of pollutants of organic nature in the Ground. It concerns in particular the safe preservation Contaminated sites that cannot be removed from the ground, or cannot be removed immediately as well as landfill that is not or not economically degradable Fabrics. The field of application of the invention is environmental protection.
Mit zunehmender Industrialisierung wird die Gefahr der Verschmutzung der Böden durch verschiedenste Stoffe, die sog. Altlasten, immer größer. Besonders häufig sind Verschmutzungen durch Steinkohlen- oder Braunkohlenteere oder -peche, durch Mineralöle oder Rückstände aus der Mineralölverarbeitung, durch Kunstharze, Plast- oder Elastmaterialien sowie durch stick stoff-,phosphor- oder schwefelhaltige organische Stoffe wie Pflanzenschutzmittel oder Sprengstoffe. Die so kontaminierten Böden werden durch Regenwasser allmählich ausgespült, die Schadstoffe gelangen durch Versickerung oder auch direkt ins Grundwasser und werden dann weiter verbreitet.With increasing industrialization the danger of Soiling of soils by various substances, the so-called. Contaminated sites, always bigger. Soiling is particularly common through coal or lignite tars or pitches, through Mineral oils or residues from mineral oil processing Synthetic resins, plastic or elastic materials and stick organic substances containing substances, phosphorus or sulfur such as Plant protection products or explosives. The so contaminated Soils are gradually flushed out by rainwater Pollutants get into the soil through infiltration or directly Groundwater and are then further spread.
Man hat versucht, die Verbreitung der Verunreinigungen durch vorbeugende Baumaßnahmen zu verhindern. Die Austragung mit dem Grundwasser kann entweder durch dessen Reinigung in teuren und bedienungsaufwendigen oberirdischen Anlagen oder durch eine Einkapselung der Ablagerung mit einer dichten Wand erreicht werden. Diese Maßnahmen sind sehr kostspielig und mit einem hohen technischen Aufwand verbunden.Attempts have been made to spread the contaminants through preventive building measures. The event with the Groundwater can either be cleaned in expensive and operator-intensive above-ground systems or by a Encapsulation of the deposit achieved with a dense wall become. These measures are very expensive and with one high technical effort.
Die Erfindung hat das Ziel, die genannten Nachteile der bekannten Umweltschutzverfahren zu beseitigen.The invention aims to overcome the disadvantages mentioned eliminate known environmental protection processes.
Das Wesen der Erfindung besteht darin, die kompakt vorliegenden bzw. deponierten Stoffe mit einer mikroorganismenhaltigen Bodenschicht zu umgeben, in der die Eindiffusion von Bestandteilen der Ablagerungen durch die mikrobielle Aktivität abgefangen wird, so daß keine weitere Verbreitung dieser Stoffe erfolgen kann.The essence of the invention is the compact present or deposited substances with a microorganism-containing To surround soil layer, in which the diffusion of Components of the deposits due to the microbial activity is intercepted, so that no further spread of these substances can be done.
In einer einfachen Variante der Erfindung werden natürlicherweise in dieser Bodenschicht vorhandene Mikroorganismen durch Nährstoffzugabe aktiviert. Das erfolgt vorzugsweise durch Zusatz von Wasser-, Nährstoff- und/oder Sauerstoff. Im allgemeinen werden jedoch extern gezüchtete Mikroorganismen eingebracht, die mittels Selektion, aus natürlichen oder anthropogenen Umgebungen isoliert und unter Zugabe der aus den Ablagerungen abzubauenden Stoffe gezüchtet wurden. Die Einarbeitung erfolgt vorzugsweise in Suspensionsform oder aufgezogen auf feste Träger. Ein Beispiel für erfindungsgemäß eingesetzte Mikroorganismen ist das Gemisch von Pseudomonas putida und Pseudomonas spec., das zum Abbau von polycyclischen aromatischen Kohlenwasserstoffen verwendet wird.In a simple variant of the invention naturally present in this soil layer Microorganisms activated by the addition of nutrients. That happens preferably by adding water, nutrients and / or Oxygen. In general, however, are bred externally Microorganisms introduced by means of selection isolated or under natural or anthropogenic environments Addition of the substances to be mined from the deposits were. Incorporation is preferably carried out in suspension form or mounted on solid supports. An example for Microorganisms used according to the invention is the mixture of Pseudomonas putida and Pseudomonas spec., Which are used to break down polycyclic aromatic hydrocarbons is used.
Die Aktivität der vorhandenen oder eingebrachten Mikroorganismen wird laufend kontrolliert, ebenso die Konzentration der diffundierenden Schadstoffe in und außerhalb der Sperrschicht. Diese Kontrolle wird durch Sensorsets erreicht, die mittels mathematischer Programme plaziert werden, z. B. auf der Grundlage der fuzzy-Steuerungstechnik, wobei die Auswertung der erhaltenen Daten rechnergestützt erfolgt. Sobald ein eventuelles Fortschreiten der diffundierenden Stoffe über die Sperrschicht hinaus festgestellt wird, werden der Sperrschicht weitere oder andere extern gezüchtete Mikroorganismen, Nährstoffe, akzessorische Substanzen und/oder Spurenelemente und/oder Sauerstoff zugeführt. Als akzessorische Substanzen und Spurenelemente dient beispielsweise ein Gemisch von Ammoniumchlorid, Kaliumdihydrogenphosphat, Magnesiumsulfat, Kupfersulfat, Hefeextrakt und Pepton.The activity of the existing or introduced microorganisms is continuously monitored, as is the concentration of the diffusing pollutants in and outside the barrier layer. This control is achieved by means of sensor sets, which use mathematical programs are placed, e.g. B. based the fuzzy control technology, the evaluation of the obtained Data is computer-based. As soon as a possible Progress of the diffusing substances over the barrier layer Beyond that, the junction will be further or other externally grown microorganisms, nutrients, accessory substances and / or trace elements and / or Oxygen supplied. As accessory substances and For example, a mixture of trace elements is used Ammonium chloride, potassium dihydrogen phosphate, magnesium sulfate, Copper sulfate, yeast extract and peptone.
Die durch die Erfindung erzielbaren Vorteile bestehen insbesondere darin, daßThe advantages that can be achieved by the invention exist especially in that
- - bautechnische Maßnahmen drastisch reduziert werden, damit- Construction measures are drastically reduced so
- - der Verbrauch von Baustoffen minimiert wird, - the consumption of building materials is minimized,
- - nur natürliche Stoffe eingesetzt werden (ausselektierte Mi kroorganismen, Nährmedien und evtl. Mikrooganismenträger),- only natural substances are used (selected Mi microorganisms, nutrient media and possibly microorganism carriers),
- - minimaler Wartungsbedarf erforderlich ist, weil das Ver fahren vollautomatisch durchgeführt wird.- Minimal maintenance is required because the Ver driving is carried out fully automatically.
Die Erfindung soll nachstehend durch Ausführungsbeispiele näher erläutert werden.The invention will be explained in more detail below by means of exemplary embodiments are explained.
Fig. 1 zeigt das Schema eines mit polycyclischen aromatischen Kohlenwasserstoffen kontaminierten Grundstückes, das mit einer bioaktiven Sperrschicht konserviert ist. Fig. 1 shows the scheme of a contaminated with polycyclic aromatic hydrocarbons plot, which is conserved with a bioactive barrier layer.
Entsprechend diesen Schemas lag in einem Grundstück der Kontaminationsherd 1 mit polycyclischen aromatischen Kohlen wasserstoffen (PAK). Es wurde eine erhöhte PAK-Konzentration von 25 mg pro Liter im Grundwasser außerhalb des Kontaminationsherdes in Grundwasserflußrichtung 2 gemessen. Für die Reinigung des ausfließenden Wassers wurde die bioaktive Sperrschicht 3 in Form eines eingefrästen Schachtes eingebaut, der bis an die unterste Grenze der kontaminierten Grundwasserschicht reichte und mit einem bioaktiven PAK- abbauenden Feststoffpräparat gefüllt war. Die Dicke der Schicht 3 wurde zu 0,6 m gewählt, um eine Verweilzeit von etwa 20 Stunden im Raum des mit 0,6 m/d fließenden Grundwassers zu sichern. Der innere Raum der Sperrschicht wurde über die Druckluftleitung 4 belüftet. Die Abbauaktivität von Mikroorganismen in der Sperrschicht wurde indirekt durch die Messungen der Sauerstoffkonzentration im Wasser und durch die CO2-Konzentration in der Abluft mit Hilfe von eingebauten Sensoren verfolgt. Eine direkte Messung der PAK-Konzentration in Wasserproben wurde mittels Fließ-Injektions-Analyse vorgenom men. Eine wartungsfreie sichere Arbeit der Sperrschicht, in der ein Abbau von PAK im Grundwasser bis zu 3 mg pro Liter über mehrere Monate erreicht werden konnte, wurde festgestellt. According to these schemes, contamination site 1 with polycyclic aromatic hydrocarbons (PAHs) was located on a plot of land. An increased PAH concentration of 25 mg per liter in the groundwater outside the contamination source in the direction of the groundwater flow 2 was measured. For the purification of the outflowing water, the bioactive barrier layer 3 was installed in the form of a milled shaft which reached to the lowest limit of the contaminated groundwater layer and was filled with a bioactive PAH-reducing solid preparation. The thickness of layer 3 was chosen to be 0.6 m in order to ensure a dwell time of about 20 hours in the space of the ground water flowing at 0.6 m / d. The inner space of the barrier layer was ventilated via the compressed air line 4 . The degradation activity of microorganisms in the barrier layer was indirectly monitored by measuring the oxygen concentration in the water and by the CO 2 concentration in the exhaust air with the help of built-in sensors. A direct measurement of the PAH concentration in water samples was carried out using flow injection analysis. A maintenance-free, safe work of the barrier layer, in which a breakdown of PAH in the groundwater up to 3 mg per liter over several months was found.
Fig. 2 zeigt die Ausbildung von bioaktiven Sperrschichten um eine Kontamination im ungesättigten Bodenbereich. Fig. 2 shows the formation of bioactive barrier layers to a contamination in the unsaturated soil region.
Ein mit Mineralölkohlenwasserstoffen (MKW) kontaminierter Bodenbereich 1 (Fig. 2) lag 6 m unter der Erdoberfläche. Gleichzeitig befand sich sein unteres Niveau etwa 10 m über dem Grundwasserspiegel 3. Der Kontaminationsherd erweiterte sich allmählich nach unten, so daß einer Grundwasserkontaminierung vorgebeugt werden mußte. In diesem Fall wurden Sanierungs- und Stabilisierungsmaßnahmen gleichzeitig durchgeführt. Im unteren und im oberen Kontaminationsbereich wurde die Luft-Wasser- Dispersion durch die Bohrungen 2 eingeführt. Durch eine dosierbare Zugabe von feuchter Luft, die mit der gemessenen Bodenfeuchtigkeit gekoppelt war, wurde gesichert, daß einerseits kein Wasser aus dem zu sanierenden Bereich nach unten auslief, andererseits eine fürs Unterhalten der Mikroorganismenaktivität ausreichende Bodenfeuchtigkeit erhalten blieb. Die im Boden vorhandenen und durch die Befeuchtung und Belüftung aktivierten Mikroorganismen bildeten im oberen und im unteren Kontaminationsbereich bioaktive Sperrschichten. Die MKW- Konzentration sank innerhalb der Sperrschichten etwas unter den zulässigen Grenzwert und blieb über die gesamte Sanierungszeit in diesem Bereich. Während der Sanierung wurde die obere Sperrschicht mit der vom Wasser übersättigten und die untere Sperrschicht mit der trockenen Luft belüftet. Die MKW aus der aufsteigenden Luft wurden in der oberen Sperrschicht vom Wasser absorbiert und durch die Mikroorganismen abgebaut. Die aus der Erde ausgetretene Luft wies kaum meßbare MKW-Konzentrationen aus.A soil area 1 ( FIG. 2) contaminated with mineral oil hydrocarbons (MKW) was 6 m below the surface of the earth. At the same time, its lower level was about 10 m above groundwater level 3 . The source of contamination gradually widened downwards, so that groundwater contamination had to be prevented. In this case, renovation and stabilization measures were carried out simultaneously. The air-water dispersion was introduced through the holes 2 in the lower and in the upper contamination area. A metered addition of moist air, which was coupled with the measured soil moisture, ensured that, on the one hand, no water ran downward from the area to be rehabilitated, and on the other hand that sufficient soil moisture was maintained to maintain the microorganism activity. The microorganisms present in the soil and activated by the humidification and ventilation formed bioactive barrier layers in the upper and lower contamination areas. The MKW concentration dropped slightly below the permissible limit value within the barrier layers and remained in this area for the entire renovation period. During the renovation, the upper barrier layer was aerated with the water-saturated and the lower barrier layer with the dry air. The MKW from the rising air was absorbed by the water in the upper barrier layer and broken down by the microorganisms. The air escaping from the earth showed hardly measurable MKW concentrations.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4329005A DE4329005A1 (en) | 1992-11-12 | 1993-08-28 | Stabilisation of organic pollutant deposits in soil - by controlled addn. of nutrients or microorganisms to surrounding soil |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4238106 | 1992-11-12 | ||
| DE4329005A DE4329005A1 (en) | 1992-11-12 | 1993-08-28 | Stabilisation of organic pollutant deposits in soil - by controlled addn. of nutrients or microorganisms to surrounding soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4329005A1 true DE4329005A1 (en) | 1994-05-19 |
Family
ID=6472646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4329005A Withdrawn DE4329005A1 (en) | 1992-11-12 | 1993-08-28 | Stabilisation of organic pollutant deposits in soil - by controlled addn. of nutrients or microorganisms to surrounding soil |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4329005A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9401165A (en) * | 1994-07-14 | 1996-02-01 | Vermeer Grond En Wegen Bv | Method for cleaning polluted soil |
| DE19505514A1 (en) * | 1995-02-10 | 1996-08-14 | Lausch Gmbh & Co Kg Umwelt Und | Combined decontamination of soil polluted with difficult degradable organic pollutants and heavy metals |
| DE102023002749B3 (en) * | 2023-07-04 | 2024-10-17 | Plantcare Ag | Method and device for determining the microbiological activity of soils |
-
1993
- 1993-08-28 DE DE4329005A patent/DE4329005A1/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9401165A (en) * | 1994-07-14 | 1996-02-01 | Vermeer Grond En Wegen Bv | Method for cleaning polluted soil |
| DE19505514A1 (en) * | 1995-02-10 | 1996-08-14 | Lausch Gmbh & Co Kg Umwelt Und | Combined decontamination of soil polluted with difficult degradable organic pollutants and heavy metals |
| DE102023002749B3 (en) * | 2023-07-04 | 2024-10-17 | Plantcare Ag | Method and device for determining the microbiological activity of soils |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8141 | Disposal/no request for examination |