| Location of performance / Site: | Schwandorf, Bavaria, Germany, Europe |
|---|---|
| Period: | Since Apr 2014 |
| Responsible company location: | Schrobenhausen (Headquarters) |
| Project Partners: |
|---|
In the so-called inner area of the Schwandorf sleeper plant, the entry zone for tar oil extends over a total length of approx. 900 m contaminated groundwater flows in a radial direction from the site in a south-westerly direction
to the north. Due to the presence of creosote as a separate phase potentially endangered is the Burgsandsteinaquifer under the groundwater accumulation horizon of the first groundwater storey.
The task is to mobilize the tar oil in sections by pumping out groundwater at a high pumping rate (up to approx. 5 l/s per well) from a total of 36 rehabilitation wells and removing it from the first aquifer as far as possible.
- Phase conveying with special phase pump systems
- Precipitation, flocculation and sedimentation with pH control, oxidation and flocculant dosing
- Fixed-bed bioreactor for the biological degradation of naphthalene with subsequent multi-stage activated carbon filter system
- Automatic filter backwash with sludge storage
- Extensive measurement and control technology, programmable logic controller with data storage and remote access
- Throughput: approx. 35 m³/h
Pollutants: creosote in phase, iron, PAH
| In-situ process GWS: | Phase recovery, Pump and Treat, Phase delivery via pumping systems |
|---|---|
| Treatment methods: | Activated carbon filtration, Precipitation / Flocculation, Solids sedimentation, Neutralization, Stripping |
| Pollutants: | Iron, PAH, Tar oil in phase (DNAPL) |
| Volume flow: | 35 m³/h |
