A systematic comparison of commercially produced struvite: Quantities, qualities and soil-maize phosphorus availability.

Production of struvite (MgNHPO·6HO) from waste streams is increasingly implemented to recover phosphorus (P), which is listed as a critical raw material in the European Union (EU). To facilitate EU-wide trade of P-containing secondary raw materials such as struvite, the EU issued a revised fertilizer regulation in 2019. A comprehensive overview of the supply of struvite and its quality is presently missing.