PB2
Automatic pilot-test unit
Designing an in situ remediation system for complex soil conditions with heterogeneous
contaminant distribution is complex while many system components interact on
each other.
Specially when the remedial system needs to operate as extensively as possible, utilising
the soil's natural biological ability to breakdown contamination detailed
analysis of the underground system is required.
Shown is a fully automatic recording unit capable of recording simultaneously:
Air movements (3D) in the unsaturated zone ( down to 1 mm/hr);
Concentration of gasses (O2, CO2, N2O, CH4, H2S and HC vapours);
In the data processing unit these two were combined as flux of the individual
gasses in three dimensions;
The sensor data is compared to results of analysis of gasses and water (both
taken automatically every 15 minutes) using on-line analytical instruments
(GC-TCD, UV-Vis)
The system also records depth to groundwater at several positions, the groundwater
flow direction (2D) using the G&H groundwater vector-sensor and variations
in depth, NO3 concentration in capillary fringe to measure diffusive upwards
movement.
Meteorological conditions: wind speed and direction, sunshine intensity, air
temperature and humidity, rainfall and evapotranspiration are recorded and
correlated with the gaseous movements in the unsaturated zone.
