Soil Vapour Extraction (soil vapour extraction)

Volatile organic contaminants usually occur in the soil as residual phases. The extraction of air creates a flow of fresh air which triggers the absorption of contaminants into the soil vapour. The contaminant-laden soil vapour is subsequently extracted from the soil by appropriate vacuum generators and purified. For the purification of soil vapour, we use activated carbon >>or our MINICAT >>.

Our soil vapour extraction plants are also employed for the cleanup of contaminated waste soil landfills / heaps or the suction involved in
air sparging >>.

Soil Vapour Extraction Container

Our soil vapour extraction container is a ready-to-operate, compact and weather-proof system for outdoor as well as indoor use. It is equipped with a water separator, a discharge pump and a vacuum pump or a side channel blower. The whole system is mounted in a robust frame with an optically appealing encasement. The interior walls of the container are fitted with sound and heat insulation.

Automatic Well Management

To optimise the rate of contaminant extraction, we make use of the method of intermittent air extraction. All soil vapour wells are summarised on a busbar with automatic shut-off valves. An automatic measurement system periodically gauges the contamination concentration at every well. The process control collects the relevant information and ensures the highest possible rate of contaminant extraction with the lowest possible energy consumption.

Bioventing

In addition to the removal of contaminants through desorption, soil vapour extraction stimulates the microbiological degradation of hydrocarbons in the soil. Through the inflow of fresh air during the process of soil vapour extraction, oxygen is transported into the soil, where it improves the living conditions of indigenous bacteria that will cause the microbiological degradation of contaminants. This process can be optimised by the employment of additional vent wells. To prevent the drying-up of the soil, the soil vapour should be extracted by a circulatory system.