Abstract Membrane crystallization (MCr) have been applied on real wastewater to study the potential of recovering phosphorus as struvite (MgNH4PO4·H2O). The performance of MCr shows a stable flux at recovery factor of 70%. To facilitate struvite precipitation, magnesium has been added in the molar ratio of 1:1.3 of P:Mg. A recovery of 60% phosphorus have been obtained at pH of 8.3 and at recovery factor of 70%. Furthermore, the MCr process allows to produce an ammonia-rich stream on the permeate side, due to the hydrophobic nature of the membrane and the transport of volatile compounds through the membrane. This liquid stream can be considered to be used directly as a fertilizer product.

中文翻译：

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用于从污泥脱水过程中的废水中回收磷和汽提的膜结晶

摘要 膜结晶法（MCr）已应用于实际废水，研究了以鸟粪石（MgNH4PO4·H2O）形式回收磷的潜力。MCr 的性能在 70% 的回收率下显示出稳定的通量。为促进鸟粪石沉淀，以 P:Mg 的 1:1.3 摩尔比添加镁。在 pH 值为 8.3 和回收系数为 70% 时，磷的回收率为 60%。此外，由于膜的疏水性和挥发性化合物通过膜的传输，MCr 工艺允许在渗透侧产生富含氨的流。这种液体流可以被认为直接用作肥料产品。