Presentation of Dong Project - Haemers Technologies · 2017-03-15 · 9 mars 2017 1...

Aurélien VANDEKERCKHOVEINGÉNIEUR R&D, HAEMERS© TECHNOLOGIES

Case study

Le traitement thermique in situ - le chantier DONG (Danemark)

haemers-technologies.com19 mars 2017

Presentation of Dong Project

06-03-17

Ing. Aurélien VANDEKERCKHOVEWe restore the value of your Property

9 mars 2017

Chlorinated Solvent

Chlorinated Solvent

Chemical Intermediaries

Extraction Liquids

Degreasers

Dry cleaning/ treatment

surface

PollutionRepeated use

Spills/leaks

Chlorinated Solvent

Chemical Intermediaries

Extraction Liquids

Degreasers

Dry cleaning/ treatment

surface

Spills/leaks


Localisation of Dong Project

Hammersholt Byvej 51, 3450 Alleröd, Denmark

Dong site

Ref : http://google.be/maps/denmark Ref : https://www.google.be/maps/@55.8849891,12.33 85279,161m/data=!3m1!1e3


Determination of the Target Zone

Sampling Mapping of the contamination

TZ


Contaminant of Concern

Contaminant Cl

ClCl

Cl

Cl

ClCl

H

Trichloroethylene - TCE

Perchloroethylene - PCE

Hydrocarbons


Target Zone

Dong Energy site-before treatment

High Voltage Transformer

High tension cables

Treatment Zone


Decontamination of Dong Site

Geo Company : Consultant of Dong

Pump & Treat System

Weak Solubility of TCE & PCE

Source of pollutantinto the soil

In-Situ Thermal DesorptionARKIL & HT


ISTD treatment

Characteristics of the Target Zone

Polluted Soil Surface (area) - m² 36

Upper Treatment Depth - m 1

Lower Treatment Depth - m 9

Volume - m³ 288

Mass - tons 524

Groundwater Depth - m 9.2

Contaminant of Concern Chlorinated solvents

Maximal Concentration of chlorinated solvent – mg/kg

0,38

Minimal concentration of chlorinated solvent into the soil –mg/kg

0,17


Design of ISTD treatment

Heating tubes - 15

Perforated tubes - 24


Mounting of ISTD treatment


Mounting of ISTD - Drilling

haemers-technologies.com12

Mounting of ISTD treatment


Mounting of ISTD - Excavation

Excavation of the first meter of non pollutated soil

To protect high voltage cablescrossing the target zone

No pollution before 1 m bgl


Mounting of ISTD – Concrete Slab

Pouring of a concrete slab of 100 mm To avoid fugitive emissions


Mounting of ISTD - Burners


Mounting of ISTD - Exhausted and gas lines


Mounting of ISTD – Insulation

Rockwool 75 mm of thickness


Mounting of ISTD - Recovering of Product

Knock-out box

HeatingExchanger

Condensable gases

Non-condensable gases

Reinjected intothe burner

Treated by Geo

Heating of soilEvaporating of all contaminant

of concern

Aspiration by vapour tubes


Mounting of ISTD – Recovering of products

Knock-out boxHeating Exchanger +

pump extraction


Treatment Follow-up

Follow-up

Pressure intothe soil

Temperature

RecoveredProduct

concentrations

Target temperature at 70°C

𝐶𝑃𝐶𝐸 = 7μ𝑔

𝑙

𝐶𝑇𝐶𝐸 = 7μ𝑔

𝑙

Under below pressure

𝐶𝑃𝐶𝐸 = 4700μ𝑔

𝑚³

𝐶𝑇𝐶𝐸 = 2600μ𝑔

𝑚³


Treatment Follow-up

Monitoring of temperature into the soil


Treatment Follow-up

Collected

vapour from

perforated

tubes

Before starting,

Air concentration

into the soil

After 2

weeks

After 4

weeks

After 6

weeks

Stop criteria of

concentration

into the soil

TCE [µg/m³] 356.500 1,200 390 9,5 2.600

PCE [µg/m³] 262.700 110 45 7,3 4.700

Collected

water

Before start

GW in source

After 2 weeks After 4 weeks After 6 weeks Stop criteria

GW in plume

and source

TCE [µg/l] 340 1.5 0.95 0.57 7

PCE [µg/l] 11 0.092 0.057 0.077 7

Almost no contaminant left into the soil after 34 days of treatment


Thank you for your time


Presentation of Dong Project - Haemers Technologies · 2017-03-15 · 9 mars 2017 1...

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