Abstract Phosphorus removal and recovery from domestic wastewater is urgent nowadays. A novel process of nutrients removal coupled with phosphorus recovery from domestic sewage was proposed and optimization of induced crystallization reaction was performed in this study. The results showed that 92.3% of phosphorus recovery via induced Hydroxyapatite crystallization was achieved at the optimum process parameters: reaction time of 80 min, seed crystal loads of 60 g/L, pH of 8.5, Ca/P mole ratio of 2.0 and 4.0 L/min aeration rate when the PO43--P concentration was 10 mg/L in the influent, displaying an excellent phosphorus recovery performance. Importantly, it was found that the effect of reaction temperature on induced Hydroxyapatite crystallization was slight, thus favoring practical application of phosphorus recovery method described in this study. From these results, the proposed method of induced HAP crystallization to recover phosphorus combined with nutrients removal can be an economical and effective technology, probably favoring the water pollution control and phosphate rock recycle.

中文翻译：

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生活污水除磷结合磷回收新工艺中诱导结晶反应的优化

摘要 当前，生活污水中磷的去除和回收迫在眉睫。提出了一种生活污水中除磷结合磷回收的新工艺，并对诱导结晶反应进行了优化。结果表明，在最佳工艺参数下，诱导羟基磷灰石结晶的磷回收率达到 92.3%：反应时间为 80 min，晶种量为 60 g/L，pH 为 8.5，Ca/P 摩尔比为 2.0 和 4.0 L当进水中PO43--P浓度为10mg/L时，曝气速率为/min，显示出优异的磷回收性能。重要的是，发现反应温度对诱导羟基磷灰石结晶的影响很小，因此有利于本研究中描述的磷回收方法的实际应用。