废水中磷回收技术的研究进展

详细阐述4种从废水中回收磷的原理及方法的研究现状,包括化学沉淀法、吸附法、生物法、结晶法,分析并比较每种方法的优势与不足,为不同条件下污水中磷的回收提供依据,并展望了今后的研发方向。磷酸铵镁可作为一种环境友好型的缓释肥,磷酸铵镁结晶法的应用将成为从废水中回收磷的一种趋势,将得到更广泛的推广应用。

Research progress of techniques for phosphorus recovery from wastewater

The principle and research progress of techniques for phosphorus recovery from wastewater by four methods are illustrated in detail including chemical precipitation method,adsorption method,biological method,crystallization method;The predominance and the deficiency of each method are analyzed and compared to provide references and selections for phosphorus recovery from wastewaters under different conditions;The research and developing direction of some approaches are prospected.Because of that magnesium ammonium phosphate (MAP) can be used as a kind of environment-friendly slow-release fertilizer,it is proposed that the application of MAP crystallization method will become a trend of recovering phosphorus from wastewater and will get more extensive application.