Sewage sludge: pollutant and raw material source at the same time (German article)
The fact that phosphorus is filtered out during wastewater treatment because of its serious consequences for the aquatic ecosystem in turn makes sewage sludge an important source of raw materials. It is this ambivalence of pollutant and raw material source that has led to thinking about alternative disposal methods. One such is sewage sludge mono-incineration. (Article in German language)