Process and system for recovering phosphorus from wastewater

A method for producing inorganic phosphorus from wastewater, comprising:

• (a) thickening a phosphorus- and magnesium-containing mixture derived from microorganisms induced to release phosphorus and magnesium to provide a phosphorus- and magnesium-rich liquid and a phosphorus- and magnesium-reduced mixture;
• (b) conducting the phosphorus- and magnesium-rich liquid to a first inorganic phosphorus reactor;
• (c) anaerobically treating the phosphorus- and magnesium-reduced mixture to provide an ammonia-rich, phosphorus- and magnesium-reduced mixture;
• (d) separating a first ammonia-rich, phosphorus- and magnesium-reduced liquid from the ammonia-rich, phosphorus- and magnesium-reduced mixture;
• (e) conducting the first ammonia-rich, phosphorus- and magnesium-reduced liquid to a second inorganic phosphorus reactor to provide inorganic phosphorus and a second ammonia-rich, phosphorus- and magnesium-reduced liquid;
• and
• (f) adding ammonia to the phosphorus- and magnesium-rich liquid in the first inorganic phosphorus reactor to provide inorganic phosphorus.