Phosphate recovery from wastewaters is one of the major engineering challenges to securing the worldwide food production. Fluidized-bed heterogeneous crystallization of struvite has been one of the most considered technologies. Nevertheless, the recovery of other phosphate products could be of the major interest at industrial level. Thus, in this work we present the recovery of calcium phosphate salts as brushite by a novel fluidized-bed homogeneous crystallization (FBHC) process. The no requirement of seeds in FBHC reactor allows obtaining high-purity crystals. The operational parameters of the FBHC process have been optimized in order to achieve the higher degree of granulation and to obtain the most homogeneous distribution of granules sizes. Thus, the treatment of 1500 mg/L of phosphate at pH 9.0 with a ratio of 1.2:1.0 of [Ca²⁺]:[PO₄³⁻]_T leads to the obtaining of ca. 90% of granulation with crystals of 0.5 mm of diameter. The influence of electrolytes typically found in TFT-LCD industry has been further considered. The characterization of the spheroidal crystals obtained allowed identifying brushite (calcium hydrogenphosphate salt) as unique crystal phase.

从废水中回收磷酸盐是确保全球食品生产的主要工程挑战之一。鸟粪石的流化床非均相结晶一直是最受关注的技术之一。然而，其他磷酸盐产品的回收在工业水平上可能是最重要的。因此，在这项工作中，我们介绍了通过新型流化床均质结晶（FBHC）工艺回收的钙镁矿盐形式的透钙磷石。FBHC反应器中无需种子即可获得高纯度晶体。FBHC工艺的操作参数已经过优化，以实现更高的制粒度并获得最均匀的颗粒尺寸分布。因此，在pH 9.0下以[Ca] = 1.2：1.0的比例处理1500 mg / L的磷酸盐²⁺ ]：[PO ₄ ^3- ] _T导致获得ca。90％的颗粒直径为0.5毫米的晶体。TFT-LCD工业中通常发现的电解质的影响已得到进一步考虑。所获得的球形晶体的表征允许将透钙磷石（磷酸氢钙盐）鉴定为独特的晶体相。