Recycling and cleaning of building materials

Soil cleaning

Biological

The basic principle of biological soil remediation is to convert mineral oil present in contaminated soil into harmless substances, such as water and CO2. Usually, these contaminated soils come from gas stations, oil depots, leaking fuel oil tanks, disasters, ...

Physical/chemical

In physicochemical soil cleaning, we split a soil by special sequential techniques, known from mining, into different fractions to remove highly contaminated sludge and organic material from the soil batch and dump it. We can reuse the other fractions obtained as secondary building materials.

This technique is suitable for sandy to loamy soils contaminated with heavy oils (e.g. waste oil, motor oil, hydraulic oil), heavy metals (galvanic industry), PAHs (road works, gas plants) and chlorinated products (e.g. dry cleaning products, PCBs). Various mineral waste streams such as sweeping sand, sewage sludge, gully sludge and car wash sludge are also recycled into reusable materials through this technique.

Thermal

Highly contaminated soils that we cannot clean by biological or physico/chemical means are processed using thermal cleaning techniques. Provided that the contamination can be converted to the gas phase by heating. Typical contaminants: heavy motor oil, PAHs, and heavy metal such as mercury.