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Sewage sludge management in Hannover

Market and potential study sewage sludge for the North-East Region and the Hannover Metropolitan Region

Related to the changing legal requirements for sewage sludge recycling in Germany, thermal utilization in mono-incineration plants and the related requirement for the recovery of phosphorus in the sewage sludge is under consideration increasingly. In order to be able to prepare investment decisions for a potential power plant site and to understand the market in the north and east of Germany, a market analysis for this region was realized to evaluate the current sewage sludge volumes as well as their future development, their disposal routes and the resulting potential.

Besides this market evaluation of the municipal sewage sludge, a detailed analysis was carried out to investigate and evaluate the volume and disposal routes including transport distances of the municipal sewage sludge in a defined metropolitan region for the sewage treatment plants of GK 5 (> 100,000 inhabitants). The relevant sewage sludge data for the project were collected from the individual sewage plant operators by means of a questionnaire and evaluated centrally.  After a detailed presentation of the current and future legal situation, competitive paths for the future sewage sludge disposal and utilization were also pointed out in the context of a competitor analysis (lignite, hard coal, cement industry). On this basis an analysis of the climate-relevant influences through a changed sewage sludge utilization was made. Various scenarios were developed, for which FiW calculated the carbon footprint (CF) in comparison to the status quo. Furthermore, targeted savings of greenhouse gas emissions compared to the status quo were quantified and clearly presented.