WO1995007773A1 - Procede et dispositif destines respectivement a la detection de la pollution du sol et au nettoyage du sol pollue in situ - Google Patents

Procede et dispositif destines respectivement a la detection de la pollution du sol et au nettoyage du sol pollue in situ Download PDF

Info

Publication number
WO1995007773A1
WO1995007773A1 PCT/NL1994/000225 NL9400225W WO9507773A1 WO 1995007773 A1 WO1995007773 A1 WO 1995007773A1 NL 9400225 W NL9400225 W NL 9400225W WO 9507773 A1 WO9507773 A1 WO 9507773A1
Authority
WO
WIPO (PCT)
Prior art keywords
soil
drainage lines
air
liquid
lines
Prior art date
Application number
PCT/NL1994/000225
Other languages
English (en)
Inventor
Leonardus Gerardus Catharina Mathia Urlings
Henricus Bernardus Reinerus Jozef Van Vree
Original Assignee
Tauw Milieu 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 Tauw Milieu B.V. filed Critical Tauw Milieu B.V.
Priority to EP95900320A priority Critical patent/EP0804299A1/fr
Publication of WO1995007773A1 publication Critical patent/WO1995007773A1/fr

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/005—Extraction of vapours or gases using vacuum or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C2101/00—In situ

Definitions

  • the present invention relates to a method for detecting soil pollution or cleaning up polluted soil in situ, respectively.
  • the detection of soil pollution by taking samples of soil material and analyzing these samples elsewhere is generally known. Taking such a sample is very time-consuming, since, for this purpose, a tube is driven into the ground vertically or at an angle and then pulled out of the ground again together with the soil material to be analyzed. Such taking of samples is considerably impeded by buildings, cables, sewer systems and the like. If, subsequently, soil pollution is observed upon chemical analysis, the polluted soil often has to be excavated and taken to a purifying installation for purification. The purified soil material can then be put back or new, clean soil material is put back. Cleaning up polluted soil in this way is very costly.
  • the aim of the present invention is to provide a method for detecting soil pollution or cleaning up polluted soil in situ, respectively, which, inter alia, does not have these drawbacks.
  • a further object of the invention is to provide a method to prevent environmental pollution at a chemical installation.
  • polluted (soil) air is extracted via one or more air drainage lines, which are located in the soil above the groundwater level
  • polluted liquid is extracted via one or more further liquid drainage lines, which are located in the soil below the ground- water level, from the polluted soil, and the air and/or liquid thus extracted is analyzed or decontaminated, respectively.
  • air and/or liquid can be extracted from the soil and subsequently analyzed.
  • the air and/or liquid extracted can also be decontaminated so that the polluted soil can be cleaned up in situ without being excavated and purified elsewhere.
  • the method according to the invention may be used at locations where environmentally damaging substances (such as, for example, solvents, mineral oils, volatile hydrocarbons or mixtures thereof) can penetrate into the soil, and contamination of the soil and/or the groundwater and/or the soil air may occur.
  • environmentally damaging substances such as, for example, solvents, mineral oils, volatile hydrocarbons or mixtures thereof
  • the method according to the invention lends itself particularly to fuel sales outlets (filling stations), transfer stations, storage depots and other locations where there is an increased risk of soil pollution as a result of aboveground and underground activities, such as, inter alia, at chemical production sites, bus garages, car repair premises, etc.
  • the method according to the invention it is possible, for example in the case of such fuel sales outlets, to extract air and/or liquid from the soil at regular intervals, to analyze this air and/or liquid for pollution, and, if pollution is observed, to clean up the polluted soil directly, if appropriate, by removing polluted air and/or liquid from the soil and decontaminating it.
  • the spread of soil pollution can in this way be prevented at an early stage.
  • To purify the air and/or liquid extracted from the soil use may be made, for example, of a device as described in EP-Bl-0,385,555-
  • the method according to the invention may also be used to continuously extract air and/or liquid from the soil and to purify it without pollution having first being observed. The detection and cleaning-up can thus take place simultaneously or interdependently and also independently of each other.
  • the air and/or liquid drainage lines extend principally horizontally. In this manner, a large area can be covered with one drainage line.
  • a number of air and/or liquid drainage lines are arranged in a principally horizontal plane parallel to one another and with a mutual spacing of preferably at least 2 to 3 m. In this manner a large area of soil can be covered efficiently with a number of drainage lines.
  • a reduced pressure is advantageously applied in the air and/or liquid drainage lines, for example a reduced pressure of 1 to 10 kPa and, preferably, from 3 to 6 kPa.
  • the extraction of air and/or liquid from the soil is such that the concentrations of any pollutants are not too small (this is not, for example, conducive to analysis), whilst, moreover, not too little air and/or liquid is extracted from the soil.
  • sucking up air via the air drainage lines air is also sucked into the soil from the environment. This environmental air is beneficial to any bioactivity in the soil. Such bioactivity may have a favourable influence in combating soil pollution.
  • the bioactivity of the soil is further stimulated by introducing biomass and/or nutrients for biomass into the soil, which can be effected, for example, via the air and/or liquid drainage lines.
  • biomass and/or nutrients for biomass into the soil, which can be effected, for example, via the air and/or liquid drainage lines.
  • the extraction of air and/or liquid from the soil will be halted temporarily, if required.
  • waste fluids includes fluids other than air and/or liquid extracted from the soil, such as domestic waste water, vapours collected above ground, fluids originating from production processes, etc.
  • volatile vapours originating at fuel pumps, filling outlets, venting points, etc. are preferably collected and conveyed to the same decontamination installation in order to be purified.
  • a method offers a complete concept to prevent environmental pollution. It may be sufficient to have one decontamination device to purify both polluted air and/or liquid extracted from the soil and to purify volatile vapours collected elsewhere.
  • the pjjj-ifi-ertion devices described in EP-Bl-385.555 and EP- ⁇ 2,1 7 are very suitable for purifying both gases and liquids and may be used particularly advantageously according to the invention.
  • the waste water such as domestic waste water is, furthermore, collected and supplied to the decontamination device in order to be decontaminated.
  • This waste water may be released directly into the environment which, in the case of remote chemical installations which are often not connected to the sewers, is very favourable in preventing environmental pollution.
  • the rinse water flowing away from the chemical installation such as, for example, that used for clearing out and removing the spill
  • rain water which has taken up volatile pollutants
  • the invention further relates to a method for the construction, conversion or renovation of a chemical installation, such as a filling station, in which a number of drainage lines preferably extending principally horizontally are provided in the soil under the chemical installation, said drainage lines are provided above and/or under the groundwater level, - the drainage lines are connected to suction means for the application of a reduced pressure in the drainage lines, and the drainage lines are connected to a treatment device.
  • the treatment device can, in this case, be a .device for sampling, and/or analyzing, and/or purifying fluid extracted from the soil.
  • a portion of the soil is firstly excavated and replaced with a sandy soil material, and drainage lines are provided in said sandy soil material.
  • a number of trenches are firstly dug in the soil and replaced by moderately fine to coarse sand, and drainage lines are provided in said moderately fine to coarse sand.
  • a soil with moderately fine to coarse sand is, however, very suitable for extracting air and/or liquid from the soil by means of drainage lines.
  • collector means for collecting vapours originating from fuel pumps, filling outlets, venting points, etc. and to connect said collector means to the decontamination installation.
  • collection means for waste water such as domestic waste water, are also provided and connected to the decontamination installation.
  • the collection means are provided in such a manner that they also collect rinse water and/or rain water.
  • the invention further relates to the application of an underground drainage system having: air drainage lines located in the soil above the groundwater level, and/or liquid drainage lines located in the soil under the groundwater level, for analyzing (soil) air and/or groundwater and optionally cleaning up polluted (soil) air and/or polluted groundwater.
  • the invention also relates to a device'for applying the methods according to the invention.
  • the invention will be further described on the basis of an illustrative embodiment illustrated in the attached figure.
  • the figure shows a service station for filling up cars 6 with fuel.
  • a number of fuel pumps 5 are placed on liquid-tight surfacing k .
  • Under the liquid-tight surfacing •, and above the groundwater level 3. a number of parallel air drainage lines 1 are provided in the unsaturated zone of the soil.
  • a number of parallel liquid drainage lines 2 are provided in the soil under the groundwater level 3-
  • the fuel pumps 5 are connected to supply tanks 7 via lines 9. It is advantageous according to the invention if, along the lines 9. yet further drainage lines (not shown) are provided. These may, depending on the depth at which the lines 9 lie, be air or liquid drainage lines. At the fuel tanks 7, further air and fluid drainage lines 1 and 2 are also advantageously provided.
  • the drainage lines 1 and 2 are connected to a treatment device 8 via suction means which can create a reduced pressure in the drainage lines.
  • This treatment device may comprise sampling means and/or analyzing means and/or detection means and/or purification means for purifying air and/or liquid extracted from the soil.
  • sampling means and/or analyzing means and/or detection means and/or purification means for purifying air and/or liquid extracted from the soil.
  • a forced evaporation of volatile components present in the soil takes place as a result of the reduced pressure provided in the air drainage lines.
  • the soil air with the evaporated components is collected in the air drainage lines and conveyed to the treatment device 8.
  • the soil air is treated, in the sense that pollutants are detected or analyzed, or that soil air is sampled for, for example, laboratory analysis, and/or that the soil air is purified.
  • PID meter Photo Ionization Detector
  • FID meter Flame Ionization Detector
  • purification means use may be made advantageously of a device such as described in EP-Bl-0,385,555- However, it will be obvious that other detection/ analyzing means and purification means are also perfectly usable. The air and/or liquid drains are provided particularly at those points where the risk of soil pollution is great.
  • these points are located particularly: under and around the liquid-tight surfacing; around the storage tanks 7; around the fuel lines 9; and close to the filling points for the storage tanks 7- In particular, the portion of soil above the groundwater level
  • the unsaturated zone is outstandingly suitable for handling any pollution since, by extracting soil air from this portion of soil, micro ⁇ organisms present in said portion of soil are stimulated. As a result of the reduced pressure in the air drainage lines, there will also be a transfer of oxygen from the ambient air to the portion of soil lying above the groundwater level. This oxygen is an outstanding source of oxygen for microorganisms living in this portion of soil. These microorganisms may then biologically degrade any pollutants to form non- harmful compounds or less harmful compounds. Such biostimulation can be enhanced by adding biomass and nutrients therefor to said portion of soil lying above the groundwater level. This biomass and these nutrients may optionally be introduced into the soil via the air drainage lines.
  • the availability for biodegradation of the pollutant may be enhanced by introducing surface-active substances, such as detergents. These substances may also enhance the effectiveness of flushing or leaching of the soil as a result of enhanced absorption. During this introduction via the drainage lines, the extraction of fluids from the soil may be halted for a shorter or longer period, if required.
  • the air drainage lines and the liquid-tight surfacing are preferably provided near the fuel pumps in a service station, as illustrated in the figure.
  • the air drainage lines lie at least approximately 1 metre above the groundwater level, since, in that case, little or no groundwater is sucked up.
  • the air drainage lines also have to lie sufficiently deep in the soil so that they are not damaged during laying of, interalia, the liquid-tight surfacing and other installations on the ground.
  • the air drainage lines along the underground lines 9 and/or at the storage tanks 7 preferably lie in the vicinity of these lines 9 and storage tanks 7, respectively.
  • the liquid drainage lines are preferably laid principally perpendicularly under the air drainage lines, but at a greater depth than the air drainage lines. Preferably, these liquid drainage lines lie at least 1 metre under the groundwater level, in a sandy environment.
  • the drainage lines can also be provided vertically, optionally combined with horizontal drainage lines, in which case they are suitable for so-called deep-well and/or controlled drainage.
  • sampling frequency preferably twice per year is desirable.
  • the sampling frequency must be such that any pollution of the groundwater can still be controlled with the aid of the drainage lines so that drainage lines present in the ground are sufficient for cleaning-up and no additional measures have to be taken.
  • the extraction means for groundwater and soil air may be provided at very limited cost.
  • the installation costs will be higher, since aboveground and underground infrastructure has to be removed and replaced. Removal and replacement of aboveground and underground infrastructure can be avoided, if desired, by providing the drainage pipes in the ground under the existing installation in another manner known per se in the prior art.
  • the drainage pipes may, in this case, be provided both horizontally and vertically.
  • a further advantage of the methods and devices according to the invention is that the time between observation of soil pollution and the commencement of the clean-up can be kept extremely short (for example, a few days), and that, during the clean-up, the operation of the chemical installation can be continued.
  • purification installation The various air and water flows are brought to a purification device (purification installation) .
  • This purification installation has to be able to treat gases (air and soil air) and liquids (such as soil water, waste water and rain water) simultaneously.
  • purification installations may be used such as those described in European Patent EP-0,385,555 and EP-0,442,157- The content of said
  • European Patents must be regarded as a component of the present patent application as regards the purification device.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Mycology (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Microbiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Biotechnology (AREA)
  • Biomedical Technology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention se rapporte à un procédé et à un dispositif destinés respectivement à la détection de la pollution du sol et au nettoyage du sol pollué in situ. Selon ce procédé, de l'air pollué est extrait du sol pollué par une ou plusieurs conduites d'extraction d'air qui sont situées dans le sol au-dessus du niveau de la nappe phréatique, et/ou un liquide pollué est extrait du sol pollué par une ou plusieurs conduites d'extraction de liquide qui sont situées dans le sol, au-dessous de la nappe phréatique, et l'air et/ou le liquide ainsi extraits sont respectivement analysés ou décontaminés. Les conduites d'évacuation d'air s'étendent principalement à l'horizontale, de préférence à au moins un mètre au-dessus de la nappe phréatique. Les conduites d'extraction de liquide s'étendent principalement à l'horizontale, de préférence à au moins un mètre au-dessous de la nappe phréatique. Une pression réduite, de préférence comprise entre 3 et 6 kPa, est appliqué aux conduites d'extraction d'air. Afin de prévenir toute pollution environnementale supplémentaire, des vapeurs et des fluides résiduaires libérés sont également recueillis et de préférence introduits dans le même dispositif de décontamination.
PCT/NL1994/000225 1993-09-15 1994-09-15 Procede et dispositif destines respectivement a la detection de la pollution du sol et au nettoyage du sol pollue in situ WO1995007773A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95900320A EP0804299A1 (fr) 1993-09-15 1994-09-15 Procede et dispositif destines respectivement a la detection de la pollution du sol et au nettoyage du sol pollue in situ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9301596A NL9301596A (nl) 1993-09-15 1993-09-15 Werkwijze en inrichting voor het signaleren van bodemverontreiniging respectievelijk het in situ saneren van verontreinigde bodem.
NL9301596 1993-09-15

Publications (1)

Publication Number Publication Date
WO1995007773A1 true WO1995007773A1 (fr) 1995-03-23

Family

ID=19862883

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1994/000225 WO1995007773A1 (fr) 1993-09-15 1994-09-15 Procede et dispositif destines respectivement a la detection de la pollution du sol et au nettoyage du sol pollue in situ

Country Status (4)

Country Link
EP (1) EP0804299A1 (fr)
CA (1) CA2171833A1 (fr)
NL (1) NL9301596A (fr)
WO (1) WO1995007773A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0846502A2 (fr) * 1996-12-09 1998-06-10 Domenico Pizzorni Dispositif pour le traitement du sol au voisinage de structures enterrées
GB2389360A (en) * 2002-06-06 2003-12-10 Keller Ltd Removing non aqueous liquids from the ground
FR3100142A1 (fr) 2019-08-28 2021-03-05 Rmv Equipement Dispositif d’extraction et de décontamination de substances organiques et/ou inorganiques à partir de matières solides ou semi-solides sous le contrôle de plusieurs paramètres

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003280A1 (fr) * 1989-08-31 1991-03-21 Dames & Moore Pty. Ltd. Appareil d'elimination des agents contaminants volatiles d'un sol
US5116515A (en) * 1991-04-24 1992-05-26 Soil Guardian Inc. Process and apparatus for removing volatile organic compounds from contaminated vadose soil areas
WO1993011307A1 (fr) * 1991-12-02 1993-06-10 Födtani Kutató És Fúró Kft. Procede pour un traitement de sol localise, en particulier pour l'analyse et le nettoyage d'un sol pollue
EP0551978A2 (fr) * 1992-01-14 1993-07-21 AT&T Corp. Procédé et dispositif d'assainissement de sols contaminés

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003280A1 (fr) * 1989-08-31 1991-03-21 Dames & Moore Pty. Ltd. Appareil d'elimination des agents contaminants volatiles d'un sol
US5116515A (en) * 1991-04-24 1992-05-26 Soil Guardian Inc. Process and apparatus for removing volatile organic compounds from contaminated vadose soil areas
WO1993011307A1 (fr) * 1991-12-02 1993-06-10 Födtani Kutató És Fúró Kft. Procede pour un traitement de sol localise, en particulier pour l'analyse et le nettoyage d'un sol pollue
EP0551978A2 (fr) * 1992-01-14 1993-07-21 AT&T Corp. Procédé et dispositif d'assainissement de sols contaminés

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
COFFA ET AL.: "In-situ bodemsanering ondergraaft bestaande techniek", PT PROCESTECHNIEK, vol. 47, no. 2, February 1992 (1992-02-01), RIJSWIJK NL, pages 48-50 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0846502A2 (fr) * 1996-12-09 1998-06-10 Domenico Pizzorni Dispositif pour le traitement du sol au voisinage de structures enterrées
EP0846502A3 (fr) * 1996-12-09 1999-04-21 Domenico Pizzorni Dispositif pour le traitement du sol au voisinage de structures enterrées
GB2389360A (en) * 2002-06-06 2003-12-10 Keller Ltd Removing non aqueous liquids from the ground
FR3100142A1 (fr) 2019-08-28 2021-03-05 Rmv Equipement Dispositif d’extraction et de décontamination de substances organiques et/ou inorganiques à partir de matières solides ou semi-solides sous le contrôle de plusieurs paramètres

Also Published As

Publication number Publication date
EP0804299A1 (fr) 1997-11-05
CA2171833A1 (fr) 1995-03-23
NL9301596A (nl) 1995-04-03

Similar Documents

Publication Publication Date Title
AU674319B2 (en) Linear contaminant remediation system
US4582611A (en) Soil decontamination with wick drains
US5120160A (en) Method and apparatus for confining and reclaiming hydrocarbon contaminated land sites
US5037240A (en) In-situ soil treatment process
CN105234164A (zh) 一种有机污染土壤的异位生物堆气相抽提/生物通风修复装置和方法
US5054961A (en) Onsite soil treatment process
WO1993023134A9 (fr) Systeme lineaire de traitement de contaminants
CN103170497B (zh) 轻质油污染非饱和带土壤的原位修复装置和方法
US5106232A (en) Method of in situ decontamination
CN104874592A (zh) 一种污染土壤原位多相抽提***
CN112620325A (zh) 一种针对含水层napl污染的热强化多相抽提的***和方法
CN204620625U (zh) 一种污染土壤原位多相抽提***
CN214289987U (zh) 一种针对含水层napl污染的热强化多相抽提的***
CN212976282U (zh) 组合式土壤及地下水修复一体化设备
CN111097785A (zh) 用于修复污染土壤及地下水的方法
WO1995007773A1 (fr) Procede et dispositif destines respectivement a la detection de la pollution du sol et au nettoyage du sol pollue in situ
JP2006130419A (ja) 汚染地層浄化システムおよびそれを用いた汚染地層浄化工法
CN112429864B (zh) 修复有机污染地下水的***和方法
US6746605B2 (en) Multi-arrayed vacuum recovery method and system for groundwater wells
CN206810852U (zh) 一种有机物污染场地土壤的异位气相抽提修复装置
Reid et al. A new angle on ground-water remediation
CN210736265U (zh) 一种用于地下水轻质非水相污染修复的一体化设备
CN212792389U (zh) 一种用于清除土壤及地下水污染的修复井
Reis Considerations in designing a free product recovery system at NAF Adak, Alaska
Strang et al. Removal and Treatment of Dissolved and Floating Organic Compounds in a Contaminated Groundwater

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2171833

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 1995900320

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 1996 617816

Country of ref document: US

Date of ref document: 19960516

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 1995900320

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1995900320

Country of ref document: EP