The PHOS4LIFETM technology provides a way to recover phosphorus in the form of phosphoric acid from incinerated sewage sludge ashes.
The mineral resources of phosphorus, phosphates, although relatively abundant are a finite and non-renewable resource. Europe lacks these resources and is completely dependent on their import, which has led to the classification of phosphates as a critical raw material for the European economy.
The main way to remedy this situation is to make a sustainable management of phosphorus by reducing losses during its use cycle.
With its recovery and reincorporation into the cycle, the need for mineral resources is reduced and the harmful effects that the accumulation of phosphorus causes in aquatic ecosystems are avoided.
Technology developed at the Centro Tecnológico Jose Lladó de Técnicas Reunidas with the collaboration of the Swiss Foundation ZAR (Stifung Zentrum für Naccaltige Abfal-Und Ressourcennutzung)
The core of the Phos4lifeTM technology consists of
A first stage of lixiviation, being the objective of this stage to put the phosphorus in solution and to obtain a usable residue for industrial applications.
Iron recovery stage in the form of a marketable product.
Solvent extraction stage to recover impurity-free phosphoric acid
A stage of elimination of the heavy metals present in the final product.
Evaporation stage until a technical grade phosphoric acid with a concentration of 75% is obtained.