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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


VISIE

Missie

Toonaangevende, onafhankelijke in‐situ bodemsaneerder

Kwaliteit, creativiteit, innovativiteit

Profiel Mensen bij GT Solution Provider Techniek GT Academy Kwaliteit & Veiligheid Factsheets


• 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


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


• 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


• 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


EHC® Injectable controlled release carbon plus ZVI


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


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


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


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


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 PROVIDED

In Situ Bioremediation of Heavy Metals:

In Situ Metal Precipitaion(ISMP)


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


Site Overview

Site


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


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




GT Academy

Knowhow and

> 20 years of experience:

Groundwater Technologyshares


GT Academy: Purpose

Sharing our knowhow withprofessionals:•Workshops•Masterclasses•Presentations on ‘hot & new’•Support in developing remedial action plansTailored to individual needs


GT Academy: intended for

Profesionals in soil management & remediation:•Site Owners / Environmental Managers•Professional experts•Consultants•Project Managers•Regulators




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

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