A state-of-the-art Maerz PFR kiln (parallel flow regenerative shaft kiln) went into operation in Peggau in 2009. Several types of quicklime are calcined here at temperatures ranging from 950°C to 1,220°C, depending on the type. Starting in late 2019, wood dust will also be used as an alternative fuel in addition to the primary energy sources gas and lignite dust. Residual materials from the wood and sawmill industries are used as energy sources in the calcination process, in keeping with the principles of a circular economy. Using wood as a biogenic alternative fuel leads to an overall reduction in CO2 emissions, as wood consumes atmospheric CO2, which it needs to grow.