TY - CONF A1 - Adam, Christian A1 - Suhendra, Suhendra A1 - Vogel, Christian A1 - Krüger, Oliver A1 - Tetzlaff, K. T1 - Production of marketable multi-nutrient fertilisers from different biomass ashes and industrial by-products T2 - ASH Utilisation 2012 N2 - Sewage sludge ashes (SSA) contain considerable mass fractions of phosphorus (5-10 w-% P) suitable for fertiliser production. Unfortunately, also most of the heavy metals remain in the ashes. A thermochemical process was developed for the treatment of SSA to i) remove heavy metals and ii) transform phosphates into bio-available mineral phases. The technology was already demonstrated in technical scale (capacity of 300 kg/h) and the company OUTOTEC is currently planning the first industrial plant. In order to manufacture a marketable multi-nutrient fertiliser from the thermochemically treated SSA further wastes and industrial by-products were taken into account. Ammonium sulphate occurs as a by-product of the caprolactam production and was chosen as N-carrier (21 w-% N). Straw ash was tested as potassium carrier (11-15 w-% K). Granulation campaigns were carried out with intensive mixers in lab-, medium-and technical scale. NPS-and NPKS-fertilisers were produced that were characterised by suitable particle size distributions and strength. T2 - ASH Utilisation 2012 CY - Stockholm, Sweden DA - 25.01.2012 KW - Sewage sludge ash KW - Recycling fertiliser KW - Heavy metals KW - Thermochemical treatment KW - Bioavailability PY - 2012 SP - 1 EP - 7 CY - Stockholm, Sweden AN - OPUS4-25496 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -