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Solution Provider bij bodemsanering
Leading in soil and groundwater remediationSolution Provider bij bodemsanering
Leading in soil and groundwater remediation
Bodemsanerenzonder Equipment
> 20 jaar ervaring: Groundwater Technology
Sonja Vliegenthart
SOLUTION PROVIDER
Leading in soil and groundwater remediation
VISIE
Missie
Toonaangevende, onafhankelijke in‐situ bodemsaneerder
Kwaliteit, creativiteit, innovativiteit
Profiel Mensen bij GT Solution Provider Techniek GT Academy Kwaliteit & Veiligheid Factsheets
Solution Provider bij bodemsanering
• Toonaangevende, onafhankelijke in‐situ bodemsaneerder
• Kwalitatief goede, creatieve en innovatieve oplossingen.
• Doorlopend innoveren, vroeg in de marktcyclus van de bodemsaneringstechnologie
• Toegevoegde waarde voor de probleembezitter door kennis
MISSIE
Solution Provider bij bodemsanering
Visie werkomgeving
• IndustrieOntzorgen
• Olie & chemische industrie Bodemonderhoud, business as usual
• Incidentmanagement 24 op 7 experts beschikbaar voor onmiddelijke inzet, BRL SIKB 6002 gecertificeerd. Onderzoek en sanering gecombineerd bij eerste inzet
• Stedelijk gebied Extensieve in‐situ technieken, weinig ruimtebeslag
Solution Provider bij bodemsanering
• Groundwater Technology bedenkt, ontwerpt en voert in situ saneringen uit
• benzine, olie, oplosmiddelen, ontvetters, zware metalen, bestrijdingsmiddelen of andere chemische producten
• specialist in het beheersen van processen in de bodem
• slim gekozen combinaties van technieken versterken elkaar
IN SITU BODEMSANERING
Solution Provider bij bodemsanering
• Groundwater Technology ’ontzorgt’.
• Saneren tegen forfaitaire vergoeding
• Als ’solution provider’ meedenken met klanten
• Strategisch advies over hoe om te gaan met bodemverontreinigingen.
IN SITU BODEMSANERING
OORSPRONG
1975: Oil Recovery Systems1979: Groundwater Technology, Inc.
1997: De Straat Milieu-adviseurs2000: Syncera
1989: Groundwater Technology BV
2007: Groundwater Technology BV zelfstandig; nieuwe start
1989: Veldanalyses1991: eerste Biopile in Nederland1995: eerste grote volledig in-situ
sanering in Nederland (olieterminal)1995: GIS-systeem voor sturing sanering2005: Stoomsaneren2009: In Situ chloorsanering zonder
apparatuur2009: In Situ chloor en zware metalen
UNIEKE VOORBEELDEN
Solution Provider bij bodemsanering
EHC® Injectable controlled release carbon plus ZVI
Solution Provider bij bodemsanering
In Situ Saneren zonder Equipment:Principes
In Situ saneren = processen in de bodem sturen
Processen => omzetting van verontreiniging
Omzetting: Biologisch of ChemischHulpstoffen nodig
Biologisch aeroob: zuurstof en nutrientenBiologisch anaeroob: substraat & nutrientenChemisch: agressieve stoffen / katalisatoren
Solution Provider bij bodemsanering
In Situ Saneren zonder Equipment:Voorbeeld
Concreet voorbeeld: In Situ afbraak Per & Tri (ontvetters)Biologisch: anaeroob afbreekbaar, maar
eist speciale bacterienChemisch: snel afbreekbaar door reactie
met ijzer (in diep anoxisch milieu)Combinatie:
Biologie voor anoxisch milieuIJzer (0-waardig) voor afbraak
EHC is a solid or liquid material that provides:
Controlled-release, hydrophilic carbon source
Micro-scale (5- 50 um) zero valent iron (ZVI) or other reduced metals (Zn, Al), at 5 to >40% weight
Major, minor and micronutrients
EHCEHCTMTM GranularGranularEHCEHCTMTM PelletPellet EHCEHCTMTM SlurrySlurryEHCEHCTM TM PowderPowder
Actief Mengsel: EHC
EHC Installation Methods
Direct Placement:TrenchingExcavationsDeep soil mixing
Injection Methods:Direct injectionWell injections (EHC‐A)Hydraulic fracturingPneumatic fracturingJetting
Zone of Direct ContactSolid controlled‐release carbon provides surface for bacterial growth
Heterotrophic decomposition of organic plus chemical oxygen scavenging of ZVI create strong redox potentials
EHC releases VFAs plus major, minor and micro‐nutrients for downstream consumption
Bacterial Cluster
Powdered ZVI
Controlled-Release Carbon
Direct Soil Mixing – PRB Applications
Roughly horizontal planes of EHC injected via hydro‐fracturing or pneumatic fracturing.
Biochemical zone of dechlorination created through dispersal of dissolved organic carbon and low redox.
EHC Subsurface Direct Injection Methods
Pressure Activated / Horizontal Injection Tips
Allows for either top‐down or bottom‐up injection and directs the slurry laterally into the subsurface. A key feature of this probe is that it acts as a backflow preventer, keeping injection material IN the ground and not ON the ground!
EHC Direct Injection – Georgia, USA
Verification of EHC Placement
Soil cores obtained at the beginning of the installation to verify radius of influence and determine injection spacing
After exposure to air
Soil core directly after sampling
Oxidation of dissolved iron
that permeated soil ~0.5 ft above and
below fracture
Zone of Influence around EHC Seam (1 year)
Direct ZVI effects
Indirect iron effects
Enhanced thermodynamic conditions
Biostimulation
Simulation of contaminant plume moving through EHC treatment zones
EHC Mechanisms of Action
EHC Influenced Reductive Treatment Zone
21 3 4
Direct ZVI corrosion effects
Indirect ZVI effects (H2 gas and iron corrosion product generation)
Carbon substrate fermentation produces volatile fatty acids (VFAs), sulfate released from EHC‐M
Biostimulation of the aquifer zone by the dissolved components
1
2
3
4
Source Area/Hotspot Treatment
Injection PRB for Plume Control
Plume Treatment
Dosing: 0.15 to 1% wt/wtSpacing: 5 to 15 ft (DPT)
Dosing: 0.4 to 1% wt/wtSpacing: 5 to 10 ft (DPT)
Dosing: 0.05 to 0.2% wt/wtLine Spacing: based on 1 year g.w. travel distance
EHC Conceptual Remedial Design Strategies
X
EHC PRB Design
Field Injection
MW-105 located 30 ft downgradient from PRB at center of plume.
MW-106 located 40 ft downgradient of PRB at edge of plume.
Approximately 14 to 19 days in terms of groundwater travel time.
(CT concentrations Aug 2006 in ppb)
Performance Monitoring Well Locations
30 ft
40 ft
85ft
CT CF DCM CM
Influence of EHC PRB on CVOCs
Effect of EHC PRB on CT Plume
http://www.adventusgroup.com/newsletter/spring08/story2.shtml
82<1
<1
1400300
57<1 <1
13
1946
380
650 <1
25280
<1
EHC Treatment ZoneMonitoring well andCT concentration (ug/L)
N
Property Line
0 300 600
SCALE IN FEET
April 2008
98<1
<1
1600170
27<1 <1
14
94140
610
540 <1
82190
<1
EHC Treatment ZoneMonitoring well andCT concentration (ug/L)
N
Property Line
0 300 600
SCALE IN FEET
August 2007
36<1
<1
2700620
33<1 <1
17
150380
610
410 <1
2.485
<1
EHC Treatment ZoneMonitoring well andCT concentration (ug/L)
N
Property Line
0 300 600
SCALE IN FEET
February 2007
47<1
<1
770140
100011 <1
140
49067
280
460 6.4
3798
<1
EHC Treatment ZoneMonitoring well andCT concentration (ug/L)
N
Property Line
0 300 600
SCALE IN FEET
March 2005
EHC Treatment ZoneMonitoring well andCT concentration (ug/L)Property Line
0 300 600
SCALE IN FEET
March 2010August 2007February 2007March 2005
Model Predicted Effect of EHC PRB on CT Plume
http://umbbd.ahc.umn.edu
Reductive Degradation Pathways
• Biological pathway
• Redox down to ‐200 / ‐250 eV
• Risk of stagnation at dichloroethene & Vinyl Chloride
• Reductive Chemical Pathway: β‐elimination
• Two‐step proces:Anaerobic biodegradation to scavenge oxygen and produceenzymesplusZerovalent metals (Iron) reduce eH down to ‐500 eV
• At extreme low eH, chlorinated HC thermodynamicallyunstable in presence of water
Solution Provider bij bodemsanering
Leading in soil and groundwater remediationSolution Provider bij bodemsanering
Leading in soil and groundwater remediation
SOLUTION PROVIDED
In Situ Bioremediation of Heavy Metals:
In Situ Metal Precipitaion(ISMP)
Solution Provider bij bodemsanering
ISSUE
Tool & Dye factory, soil and groundwater contaminated by heavy metals and Chlorinated Hydrocarbons
Site in urban redevelopment area
• Development requires source & Plume zone Remediation
• GT requested to address deep & off-site plume
Solution Provider bij bodemsanering
Site Overview
Site
Solution Provider bij bodemsanering
SOLUTION
• Direct injection of a mixture of methanol, lactate and protamylasse leads to biodegradation of the Chlorinateds
• Low redox levels lead to sulphate reduction
• Sulphate reduces to Sulphite
• Sulphite & nickel bond to form NiS
• NiS has very low solubility => NiSprecipitates
Solution Provider bij bodemsanering
TIME & COSTS
Option Duration Cost estimate (euro)
Lab testing 3 months € 25.000
CaSO4 and Na2SO4application
1 week; € 5.000
Injection (substrate) firstround
3 weeks € 80.000
Injection (substrate) second round
3 weeks € 40.000
Monitoring 5 years € 30.000
Lump sum risk ‐ € 100.000
Solution Provider bij bodemsanering
Leading in soil and groundwater remediationSolution Provider bij bodemsanering
Leading in soil and groundwater remediation
GT Academy
Knowhow and
> 20 years of experience:
Groundwater Technologyshares
Solution Provider bij bodemsanering
GT Academy: Purpose
Sharing our knowhow withprofessionals:•Workshops•Masterclasses•Presentations on ‘hot & new’•Support in developing remedial action plansTailored to individual needs
Solution Provider bij bodemsanering
GT Academy: intended for
Profesionals in soil management & remediation:•Site Owners / Environmental Managers•Professional experts•Consultants•Project Managers•Regulators
Solution Provider bij bodemsanering
Leading in soil and groundwater remediationSolution Provider bij bodemsanering
Leading in soil and groundwater remediation
Groundwater Technology BV
Sheffieldstraat 13 Postbus 121153047 AN Rotterdam 3004 CG Rotterdam
Tel: +31 (0)10 238 2850Calamiteiten: +31 (0)10 238 2868
Fax: +31 (0)10 238 2869
E-mail: [email protected]: www.gtbv.nl
Dank voor uw Aandacht