A residual soil and groundwater contamination is present at (former) petrol station in Herentals. At the site soil and the smearing zone were remediated in the past by excavation.
However, significant residual product is still present down gradient of the excavated area especially in the smearing zone. In addition a 300m long BTEX and MTBE plume is migrating further off site.
The source is being treated by SVE combined with high yield groundwater extraction for lowering the groundwater table. The plume is being treated by a combination of biosparging and P&T. A large scale biological groundwater treatment system of 100m³/h is constructed and operated at the site.
Specifications
| Location | Herentals, Belgium |
| Client | Confidential |
| Duration | Q3 2017 - Q4 2017 |
| Contract | Time and expenses |
| Contamination | BTEX and MTBE |
| Techniques | Soil vapor extraction, P&T and biosparging |
| Installation |
Biological groundwater treatment system (100m³/h) (5 bioreactors) Conventional groundwater treatment system - polishing (stripping tower, sand filtration, WAC filtration) Soil vapour treatment system based on GAC filtration |
In numbers
| Project value | > 7.000 € | |||||||||
| Plume |
250m length 2m thickness |
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Concentration in soil (BTEX) in water (MTBE) |
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| Number of wells |
12 soil vapor extraction wells 20 biosparging wells 15 extraction wells |
Used techniques
In-situ: aerobic biodegradation, air-/biosparging, pump and treat & soil vapour extraction
Treatment system: conventional air abatement, biological groundwater treatment & conventional groundwater treatment
Contamination: BTEX and mineral oils & MTBE
Gallery
