The Swiss Wrestling and Alpine Festival ( ESAF ), which is held every three years, will take place in Pratteln from August 26th to 28th this year. Subsequently, Industrielle Werke Basel ( IWB ) will process the 245 cubic meters of sawdust used for the sawdust rings and the wood chips from other areas of the festival site into around 8 tons of biochar, IWB informed in a statement . Around 20 tons of CO2 are stored long-term in this biochar. The project is part of the federal government's sustainability strategy.
Sawdust is in itself a climate-friendly material because it is CO2-neutral, explains IWB. However, the conversion into biochar further improves the CO2 balance. Because the biochar obtained in the pyrolysis process in the absence of oxygen and at temperatures of 600 degrees Celsius removes the CO2 from the atmosphere over the long term. As a "welcome by-product", the pyrolysis also produces waste heat, which IWB feeds into the district heating network.