Thermal desorption of 450,000 tons of tar contaminated soil by means of thermal desorption. The clean-up site is known as ‘Karolina’ and is located downtown Ostrava. It was a former gaswork site, part of a major steel factory. The clean-up project was funded by the Czech National Property Fund. Excavation and pre-treatment took place on the ‘Karolina’ location, and contaminated soil to be treated thermally was transported to a specific location, approx. 2km from Karolina, where the thermal unit was set up.

Contaminated soils were processed by a counter flow, direct fired LTDU (Low Temperature Desorption Unit) with nominal capacity of 40 tons (US) per hour. The equipment train included a prescreened, belt scale conveyor, rotary dryer, fabric filter bag house, thermal oxidizer, soil moisturizer, and radial stacker. LPG (Propane) was used as process fuel from a portable tank. Electricity was supplied by a portable diesel generator. Two (2), three (3) cubic yard ubber tire front end loaders were used for screening, feeding, and removal of soils.

The project is done by means of a specially designed thermal desorption unit, with a nominal capacity of 35 t/h, equipped with a full scale ceramic filter, as well as a wet scrubber. Stack tests were successfully performed on the unit. The unit is equipped with continuous emissions monitoring.

This project was designed and executed by the current Haemers Technologies team, when they worked within the legal entity L&C SA (formerly Deep Green SA), which belongs to the Haemers Technologies group.