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Scientists at the Vienna University of Technology (TU Wien) developed a method for the reliable determination of the share of electricity from renewable energy sources in waste incineration. With regard to CO2 emissions and trading, this data is becoming increasingly important for the operators of waste incineration plants.

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Vienna (TU) - "From routine measurements at waste incineration plants we obtain data material and can thus calculate the composition of the waste". Johann Fellner from the Institute for Water Quality, Resource Management and Waste Management developed together with Oliver Cencic and Prof. Helmut Rechberger a system of equations based on several balance equations. "It is measured how much waste enters the plant, how much ash and slag remains, how the exhaust air is composed and how much steam is generated", Fellner continues to explain. "This is what we feed into our equations and thus calculate the composition of the waste.

The waste incineration plant Wels commissioned the project in cooperation with Energie AG Oberösterreich at the end of 2004 and has been able to evaluate the data independently since then after developing a special software tool. The waste that is incinerated there consists of about 60% biogenic materials (e.g. paper, kitchen waste, wood) and 23% plastics. This results in an electricity share from renewable sources of about 45%.