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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
SOKCHO, August 29th
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.
SOKCHO, August 29th
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
SOKCHO, August 29th
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
SOKCHO, August 29th
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
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