TY - CONF A1 - Krüger, Oliver A1 - Adam, Christian T1 - Sewage sludge ashes - waste or valuable resource T2 - 4th International conference industrial and hazardous waste management (Crete 2014) N2 - There is a growing concern of the direct use of contaminated sewage sludge in agriculture due possible environmental and health hazards. Thus, incineration of the sludge and thus increasing amounts of sewage sludge ashes (SSA) are to be expected in the future. SSA contains considerable amounts of phosphorus (P) and technology metals that might be recovered as secondary raw materials. Since the EU for instance depends completely on the import of rock phosphate needed for fertilizer production, alternative sources for P are in order. Furthermore, rock phosphate is often contaminated with heavy metals like Cd and U, leading to health and environmental hazards. P recovered from SSA might diminish these problems. To determine the possible recovery potential of P and technology metals from SSA, we conducted a survey of German mono incineration facilities and analyzed the respective SSA for their elemental composition. More than 95% of the emerging SSA was monitored. Results indicate a P recovery potential of 18,000 t/a (up to 13% of the annual P demands for fertilizer production). The concentrations of Cd and U in SSA are one to two Orders of magnitude lower than in rock phosphate and could help to reduce possible hazards. T2 - 4th International conference industrial and hazardous waste management (Crete 2014) CY - Chania, Crete, Greece DA - 02.09.2014 KW - Sewage sludge ash KW - Resource recovery KW - Phosphorus KW - Technology metals PY - 2014 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/31396 AN - OPUS4-31396 SN - 978-960-8475-20-5 SN - 2241-3138 SP - 1 EP - 8 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany