title: RecoPhos: full-scale fertilizer production from sewage sludge ash.
abstract: The substitution potential of sewage sludge for German primary phosphate imports has been estimated as 40%. Yet, a marketable option for the full scale recovery has been lacking. This study focuses on a full-scale process for the manufacture of a P-fertilizer from sewage sludge ash (SSA) adapted from the production of Triple Superphosphate. Given (i) conformity of the input with phosphate ores mined from sedimentary deposits, (ii) comparability of the product with a commercially available P-fertilizer regarding contaminant levels, P-fractionation and yield effects, and (iii) compliance of the output with the German Fertilizer Ordinance the RecoPhos P 38 fertilizer was discharged from the waste legislation regime. The fertilizer is currently being produced at a rate of 1000 tonnes per month and sold at a competitive price.
authors.affiliation: Technische Hochschule Mittelhessen - University of Applied Sciences, ZEuUS, 35390 Giessen, Germany. harald.weigand@kmub.thm.de
authors.forename: Harald
authors.initials: H
authors.lastname: Weigand
authors.forename: Martin
authors.initials: M
authors.lastname: Bertau
authors.forename: Wilfried
authors.initials: W
authors.lastname: Hübner
authors.forename: Fred
authors.initials: F
authors.lastname: Bohndick
authors.forename: Axel
authors.initials: A
authors.lastname: Bruckert
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis; D005308:Fertilizers; D008670:Metals / Q000032:analysis; D010710:Phosphates; D010758:Phosphorus; D012722:Sewage; D012987:Soil; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D004785:Environmental Pollutants; D005308:Fertilizers; D008670:Metals; D010710:Phosphates; D012722:Sewage; D012987:Soil; D010758:Phosphorus