CSME ERH Various Applications

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Electrical Resistance Heating (ERH)

For Various Applications

Jerry Wolf

(817) 379-0536

[email protected]

www.thermalrs.com

[email protected]

www.hmvtrs.eu

October 2013

CSME - Amsterdam

http://www.thermalrs.com/

mailto:[email protected]

http://www.hmvtrs.eu/


mailto:[email protected]




TRS ERH Global Network

TRS Group, Inc.

TRS International B.V.(‘s Hertogenbosch, The Netherlands)

TRSDoxor, Limitada

(Sao Paulo, Brazil)

HMVTRS B.V.

(Ede, The Netherlands)



Electric ity is directed into the subsur face area.

TRS ERH PROCESS

TRS Power Control Unit

What is ERH?

PCU

Electrode/Vapor

Recovery Wells

CondenserGACVR Blower

Site Building



• In Situ Soil and Groundwater – simultaneously

• VOCs and Semi-VOCs

• Heterogeneous Lithology

• Under Buildings, Roadways, Railroads

• Rapid Remediation – Brownfields/Property Transfer

• Mass Removal (Source) – Reduce Downgradient Migration

When Does ERH Apply?



TCE in Soil and Fractured BedrockEastern PA

•TCE in soil

• Treatment Area: 260 m2; 1 to 34 m bgs; 8,487 m3

• Sand and clay between 3.3-6.6 m bgs; bedrock -fractured

sandstone with occasional siltstone; coal seams at depths of 23

and 34 m bgs. Groundwater: 5 m bgs• Baseline levels in soil (maximum): 560 mg/kg

• Remedial goal(s):

• remove estimated mass - 219 kg TCE

• Negligible/asymptotic concentrations observed in the vapor stream

• total design energy



Project Site Plan



ERH Design

• 17 Electrodes (6 intervals each)

• VGAC for vapor treatment



Vapor Concentrations vs. Energy

V a p o r C o n c e n t r a t i

o n s ( p p m )

E n e r g y ( k W

h )



Results

• Asymptotic vapor concentrations in vapor stream reached after

79 days of operations (estimate of 69-90)• 181 kg of CVOC mass recovered



Seattle Site History • Active chemical warehouse and distribution facility

•

Contaminated soil first found at the site in 1990• Previously applied technologies

• 1995-1997: Soil Vapor Extraction with Pump & Treat

• 1998: DVE/Hydrogen peroxide injection Pilot

• 2003~2004: Potassium Permanganate and Sodium Permanganate Injection

• 2003~2004: SVE

• 2005~2007: Expanded SVE and Potassium Permanganate Pilot

• 2008~2011: Enhanced Reductive Dechlorination – downgradient

• 2010: Expanded ERD and Expanded SVE Pilot Testing



Guaranteed ERH Remediation of PCE

and Mineral Spirits - Seattle 2013

• Silt, sand; 7.1 x 10-3 cm/sec

• GW at 2 m bgs; flow 0.6 m/day

• 2,484 m2; variable depths; 32,188 m3

• 163 electrodes

• Elevated TOC from mineral spirits

• Active work areas & RR spurs

• Beginning maximum TCE+PCE: 4,210 mg/kg

• Remedial goal: <10 mg/kg PCE + TCE

• Contaminant mass estimate – 10,200 kg



ERH Modeling – 5 Areas

The site was divided into 5 Areas for purposes of modeling



Energy & Power Design Targets

AREA Design Energy(kWh)

Design Energy

Density(kWh/m3)

1 804,000 328

2 356,000 358

3 1,064,000 383

4 5,962,000484 shallow

209 deep

5 1,235,000 209

Total Estimated Energy Required: 9,421,000 kWh













Results

• Cumulative Energy – 7,377,000 kWh– 78% of total

• Average Power Input Rate – 2,557 kW (max weekly 3,438kW)

• Average subsurface temperature – 95.2⁰C

• All treatment areas met clean up goals set by Washington

Department of Ecology

• Total cumulative mass removed – 9,404 kg

• 56% Mineral Spirits, 44% TCE, PCE

• Total project cost - €96/m3

“I am impressed to say the least, I expected things to

clean up but not be this clean!” - Seattle Client



Results

“I have reviewed the compliance soil sample results. I agree that

the soil remediation level of 10 ppm specified in the CAP

(Corrective Action Plan) has been met, and that the thermal

treatment system can be shut down.” – Washington Department

of Ecology



Seattle Potassium Permanganate



ERH Summary• GFPR (Guaranteed) or SFPR (Standard)

pricing – nearly 100 remediation projects

• Perfect safety record

• In situ remediation of VOCs, semi-VOCs

• Unaffected by heterogeneity – easy to control

• Does not cause desiccation – Self-regulating

• Achieve >99% reduction

• Low cost compared to life cycle costs



QUESTIONS?

www.thermalrs.com

1-817-379-0536

www.hmvtrs.eu 31.318.624.624





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CSME ERH Various Applications