UBA Research Study on Fertiliser Production by P-recovery from Wastewater as an Alternative to Conventional Fertiliser Production

On behalf of the Federal Environment Agency, KWB has compared various methods of recovering phosphorus from wastewater or sewage sludge with conventional phosphate fertiliser production in an eco-friendly manner, taking into account ecological, economic and legal aspects. The aim of the project was the comparison of conventional phosphate fertiliser production with the production of recycled fertilizers from sewage, sewage sludge or sewage sludge ash in order to be able to estimate and classify environmental impacts. All aspects of mining, production, recovery and application of fertilisers were to be considered.

The study shows that the technical recovery of phosphorus makes ecological and economic sense under specific conditions.