SOKCHO, August 29th

WORKSHOP ENVIRONMENTWORKSHOP ENVIRONMENT

ACTIVE WALL PROCESSACTIVE WALL PROCESS

SOKCHO, August 29th

PERMEABLE AND REACTIVEBARRIERS

J.J. KACHRILLOEnvironmental department

director

SOKCHO, August 29th

PRINCIPLE

ACTIVE BARRIER

Polluted water Treated

water

ACTIVE BARRIER

WATER TABLE FLOW

SOKCHO, August 29th

PRINCIPLE SCHEME OF AN ACTIVE BARRIER WITH FILTERING GATES

SOKCHO, August 29th

SOME REFERENCES

• RETENTION – AUBY 1998. THC, PAH– CLIPPER OIL 2000. THC, PAH– BREST LAGUNE 2001. THC– FRANIERE 2002. Arsenic

• DESTRUCTION– SOLVA CHEMIE 1999. Chlorinated solvents– ZWEVEGEM 2002. Chlorinated solvents

SOKCHO, August 29th AUBY-CdF : Plan view of barrier

SOKCHO, August 29th

AN APPLICATION OF KEOPS PROCESS

SOLVA CHEMIE : Plan view

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SOLVA CHEMIEResults after 15 days operation

Dissolved Elements (content in µg/l) Upstream Downstream

Vinyl chloride 3 0,23

Trichloethylene 94 0,46

Cis 1-2 dichlorethylene 199 2

perchlorethylene 25 0,16

1.1.1. trichlorethane 9 0,22

Methylene chloride 0,08

1.1 dichlorethylene 0,67 0,5

trans 1.2 dichlorethylene 0,21

Chloroform 0,39

1.2 dichloropropane 0,12

SOKCHO, August 29th

CLIPPER OIL (Barcelona-Spain) General plan of the barrier

SOKCHO, August 29th

BREST LAGUNE : Example of an original conception associating

stabilisation and active containment.

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ZWEVEGEM(Belgium)

KEOPS PROCESSGeneral plan of the

barrier

C a is s o n d r a in a n t ( L = 2 . 8 m , l = 1 .2 m , H = 5 m )

P o r te

D ra in ( L = v o ir d é ta il, l = 0 ,3 m , H = 4 ,5 m )

B a r r iè re

0 5 0

E c h e lle G ra p h iq u e

P u its d 'a lim e n ta t io n d e s p o r te s ( L = 2 . 8 m , l = 1 .2 m , H = s u b s tra tu m )

4 C a is s o n sL o n g u e u r = 1 1 ,2 m

L o n g u e u r = 2 2 m

1 c a is s o nL o n g u e u r = 2 .8 m

L o n g u e u r = 2 1 m

P O R T E N ° 1

1 0 m

6 c a is s o n sL o n g u e u r = 1 6 .8 0 m

1 c a is s o nL o n g u e u r = 2 .8 m

L o n g u e u r = 1 5 m L o n g u e u r = 1 7 m

1 c a is s o nL o n g u e u r = 2 .8 m

1 c a is s o nL o n g u e u r = 2 .8 m

L o n g u e u r = 3 5 m ?

L o n g u e u r = 1 7 .3 m ?

1 0 m

P O R T E N ° 2

1 0 m

P O R T E N ° 3

Underground water table flow

Geological featuresclayey sands from ground level down to 12 mimpervious clay (K<10-9 m/s) at 12 m

Contaminationset of chlorinated solvents up to 1,9 g/l (hot spots)60 mg/l at the gates inlet (gate 3)

Goals of the treatmentTCE < 70 µg/lDCE < 50 µg/lPCE < 40 µg/lCV < 5 µg/l

SOKCHO, August 29th

ZVEWEGEM Scheme of a filtering gate

BEKAERT PLANT AT ZWEVEGEM

PRINCIPLE OF THE FILTERING GATE

Gate NorthSCHEMA.SB.JJK.01 date : 27.07.01

2.70 m

1.20 m

0.60 m

1.20 m

0.30 m

Post treatment

Treatment

FILTRE CHARBON ACTIF

Pretreatment

SHEET PILES

CONTROL PIPES

FILTRE A SABLEDRAINAGE NETWORKDRAINANTS

4.00 m

SLURRY PANEL

DOWNSTREAM

UPSTREAM

SOKCHO, August 29th ZVEWEGEM Installing a gate (1). The slurry panel is perpendicular to the sheet piles wall

SOKCHO, August 29th FRANIERE TAILINGS (Belgium)

works in preparation (pollution by As)

3000 µg/l50 µg/l

400 µg/l

200 µg/l

SOKCHO, August 29th

Soletanche-Bachy/ETI

• Soletanche-Bachy– Wider range of applications

(chlorinated solvents, cyanides, arsenic, TPH, PAH)

– Deal with clogging due to possibility of easy filter change

– Able to give long-term guaranty if maintenance

– Simple installation possible down to 40 m

– Works without energy

• ETI– Only chlorinated solvents

– Clogging not solved

– Guaranty only 6 months due to problems of clogging

– Difficulties to install if more than 10 m depth

– Cheap reagent but weaker efficiency

– Works without energy

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Conclusion : An innovative, efficient and cost-effective method

• An alternative to complete containment and pump and treat

• A curative and preventative solution to guarantee good groundwater protection

• A cost-effective : 2 to 3 times cheaper than complete containment and works without energy

• Well-suited to major pollution problems where water resources are in danger

• A real site maintenance contract

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ACTIVE WALL PROCESS***

ADVANTAGES AND APPLICATION OF PROCESS FOR KOREA

***• Rehabilitation of former industrial sites.• Increase in value of polluted lands: real estate

development• Guarantee of decontamination in progress in case of

property’s transfer.• Can be easily adapted to Korean law:

SOKCHO, August 29th

PATENTS

Title Patent dateFrance and n°

Internat Patentdate and n°

Ecosol rechargeable, barrièresouterraine anti-pollution

21/08/91FR 9110486

21/08/925-504156

PolyEcosol. Composition pour laréalisation d’une barrière anti-pollutionpolyvalente et procédé pour réaliser labarrière

27/03/92FR 920373

24/03/935-65375

Nouvelle paroi drainante. Procédé poursa réalisation et élément mis en œuvre.

26/06/96FR 960794

25/02/983-192661

Perfectionnement à la réalisation de laparoi drainante

02/02/00FR 000130

31/01/012001-23711