Struvite formation as phosphate recovery has been demonstrated to be a proven full scale technology. An essential aspect for successful implementation is the production of a pure high grade granular struvite. Granulation is essential to obtain a product with free flow properties resulting
in efficient handling and processing using existing equipment. Pure mineral struvite, not contaminated with organic residues, can be obtained by strict process control. The results of three full scale units are discussed and most important issues related to struvite quality and pellet growth
are elaborated in detail.
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