TY - CONF A1 - Adam, Christian A1 - Krüger, Oliver T1 - Complete survey of German sewage sludge ashes - phosphorous and technology metal recovery potential T2 - SUM2014 - 2nd Symposium on urban mining (Proceedings) N2 - Sewage sludge ashes (SSA) are a possible source for recovery of phosphorous (P) and technology metals. Phosphorous is essential for all animate beings. So far, its sole external source is rock phosphate, which is a finite resource. The EU import dependency on P from regions with high domestic demands or political instabilities is almost complete. Furthermore, rock phosphate often contains high amounts of heavy metals like Cd and U that might lead to health and environmetal hazards. P recovered from SSA might diminish these problems. We analyzed SSA from German mono incineration facilities in terms of their elemental composition and respective recovery potential. More than 97% of the emerging SSA is monitored, enabling the determination of complete mass flows of the ashes and their components. Results indicate a P recovery potential of 19,000 t/a (more than 12% of the annual P demands for fertilizer production). The concentrations of Cd and U in SSA are significantly lower than in rock phosphate and thus might help to reduce possible envrionmental and health hazards. T2 - SUM2014 - 2nd Symposium on urban mining CY - Bergamo, Italy DA - 19.05.2014 KW - Sewage sludge KW - Ashes KW - Phosphorous KW - Metal KW - Recovery PY - 2014 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/30824 AN - OPUS4-30824 SN - 978-8-86265-031-1 SP - Session B 4, 1 EP - 7 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany