Wet-Chemical Phosphate Precipitation

In addition to electrochemical phosphate precipitation for nutrient-rich wastewater, Fraunhofer IGB has also developed processes for wet-chemical phosphate precipitation.

These were investigated for liquid manure and fermentation residues from biogas plants and encompass all necessary process steps, from acidification of the digestate or the solid fraction of the liquid manure through solid-liquid separation to phosphate precipitation.

Fermentation residues usually contain all the reactants required for P-salt precipitation. Precipitation occurs solely through the addition of lye.