In this article Dirk Lechtenberg from MVW Lechtenberg & Partner gives an overview of dried sewage sludge as an alternative fuel source. This is the second excerpt from MVW Lechtenberg & Partner's Alternative Fuels & Raw Materials Handbook. Due to be published in the summer of 2011, the handbook will give an insight into over 80 different types of alternative fuels and raw materials with detailed descriptions of the availability, common use and practice in the cement industry.This includes processing considerations, the influence on the environment, clinker production and the economics of the various alternative fuels. Waste-water treatment plants for industrial or municipal water all over the world produce residues, so-called sludges, which are becoming more and more popular as alternative fuels in the cement industry. Especially common is the use of waste heat from the production of clinker for drying of dewatered sludge. This has several environmentally-friendly features, namely the use of waste heat, the use of dried sludge, the offering of an environmentally-friendly service to the public, reduced fossil fuels use, reduced CO_2 emissions and saving costs.
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