Procedure produces product for fertilization rich in estruvita from residual waters, both from liquid fractions and from liquids digested from drying area of stations of waters with a large content of phosophorus and nitro-hydride (Machine-translation by Google Translate, not legally binding)

The procedure consists of the following operations: a) filtration and/or sifting b) aeration of the liquids c) precipitation of the phosphorus and nitrogen, introducing the magnesium necessary by means of an aqueous suspension and/or dissolution of a sub-product derived from the manufacture of magnesium oxide by means of calcination of magnesite d) growth and crystallization of the nuclei formed in the previous operation, and e) separation and drying of the granules thus formed.