| Task |
In-situ remediation of soils and shallow aquifer |
| Location | Poole, UK |
| Period of Operation | May 2000 - April 2002 |
| Technical Process | Stage 1: Air Sparging with soil vapour extrac tion and activated car bon treatment
Stage 2: Groundwater abstraction and treat ment with twin stripping column and activated car bon treatment |
| Contaminants | Chlorinated Hydrocarbons |
| Flow Rate | Vapour: 1000m³/h
Liquid: 20m³/h |
|
Project Description
Stage 1: The system is a PLC controlled plant equipped with telemetry. Rotary Lobe blowers were used to abstract vapour contaminated with chlorinated hydrocarbons and a similar high pressure blower was used to inject air via solenoid valves individually controlled by the PLC. Extracted vapour was treated in large BRE UK 2 tonne vapour-phase activated carbon vessels.
Stage 2: The system comprised circa 15 groundwater abstraction pumps, settling tanks, sand filtration, air stripping plus vapour and aqeous phase activated carbon treatment. Off-gas treatment for the stage 1 works was integrated into the stage 2 works for treatment of off-gas from the air stripper system.
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