The use of biomass or waste wood as a substitute fuel in coal-fired power plants is becoming hugely important as the energy transition progresses. Nonetheless, coal-fired power plants apply strict requirements to conversions for alternative fuels. Tietjen has set itself the task of grinding waste wood in order to make it available as a source of energy. Production waste from the wood-processing industry can only be integrated economically and cost-efficiently to create fuel for current power plant processes if it possesses similar properties to coal. Fine grinding of the waste wood is crucial in this context.