Chemistry / Energy

Within the flue gas cleaning of a waste incineration plant, multi-stage pollutant separation takes place using dry, quasi-dry and wet processes. The reduction of HCl, SO2, HF and heavy metals including Hg takes place in multi-stage scrubbers, whereby the recycling of acid or gypsum can close industrial material cycles.

While acid and alkaline scrubbing can be considered standard processes, substances such as mercury require special technologies. In order to minimise the residual material flows resulting from waste incineration, processes such as the 3R process for filter dust leaching are coming to the fore.

Our range of services extends from the targeted separation of mercury to the treatment of heavy metal eluates and the multi-stage treatment of scrubber effluents. Process engineering sub-processes such as CO2 stripping, heavy metal precipitation/neutralisation, post-precipitation using TMT, sedimentation, ammonium reduction, polishing (filtration, activated carbon and ion exchangers) and sludge dewatering are used.

Due to the upstream thermal process, the temperature control of the waste water always plays a key role in complying with the required limit values and minimising gypsum/calcite scaling in the system.

We offer the planning, procurement, delivery and installation as well as supervision and commissioning/documentation of the complete wet section including sludge treatment.