Use of ion exchange processes as in the BioCon-process, make it possible to recover the phosphate as phosphoric acid, which is produced from apatite ore, thus preserving the limited apatite resources and the resources, mainly sulphur, needed for producing phosphoric acid from apatite.
LEVLIN, E. (n.y): Recovery of Phosphate from Sewage Sludge and Separation of Metals by Ion Exchange. Stockholm: Royal Institute of Technology URL [Accessed: 10.06.2019]