From the year 2005 onwards German waste disposal regulations prevent the disposal of residual wastes from sewage treatment plants in landfills if the waste contains more than 5% volatile solids by dry mass. As a result of this requirement the Ruhrverband, one of Germany's largest sewage treatment plant operators, needs to change its disposal methods to a certain extent. This paper describes the present ways to dispose of sludge as well as of screenings and grit. After that it outlines the concept for future disposal. Besides the legal framework the technical solutions for the different disposal problems are described and their costs are given.

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