Award as “Low Carbon Model Company of the Year”
Sewage sludge contains a high proportion of phosphorous and is frequently used as a fertiliser. Many countries aim to prohibit this in future, due to the high level of heavy metal pollution. In general, three methods of disposal remain:
From a purely energetic perspective, the incineration of sewage sludge is an interesting alternative and at the same time a logical solution. Prior treatment by drying increases the calorific value of the sewage sludge, which can then be used as a standard substitute fuel in waste-to-energy plants. The calorific value of dried raw sludge is similar to that of dried brown coal (up to 19 MJ/kg).
One possibility to dispose of untreated sewage sludge is by incineration in a rotary kiln. Here, paste-like waste can be fed into the furnace by lance. Disposal by gasification, using a DMS Direct Melting System, is also possible.
Prior to drafting a concept for sewage sludge disposal, defining the objective is key. Is it more important to just dispose off the sewage sludge, without any great effort? What other disposal challenges need to be overcome? We will deliver the most suitable concept – and the right plant.