以磷酸钙盐的形式从污水处理厂回收磷的研究

磷是一种不可再生、难以替代的有限自然资源.磷的可持续利用问题越来越受到世界各国学者与政府的高度重视.近年来,从污水厂回收磷在世界各国逐渐兴起,而我国在这方面的研究还处于起步阶段,尤其是以磷酸钙盐的形式回收磷的相关研究还未见报道.以磷酸钙盐形式回收废水中的磷,优化磷回收过程相关工艺控制条件.结果表明,pH值和Ca2 浓度是磷酸钙盐回收的关键因素,最优值分别为10和6.68,磷回收率达到90%.

Study on Phosphorus Recovery as Calcium Phosphate from Wastewater Treatment Plant

Phosphorus and its compounds are non-renewable and non-replaceable limited resources.The sustainable utilization of the phosphorus was paid close attention more and more by scholar and government all around the world.In recent years,many phosphorus recovery processes have developed in wastewater treatment plants.While in China,the study of this area is still in the beginning.Especially the studies on the phosphorus recovery as calcium phosphate have not been reported yet.Recovery phosphorus from domestic wastewater in the form of calcium phosphate,mean-while the optimal conditions for the process were investigated.Experiment results showed that pH and Ca2+ concentration were the key factors and were optimized as 10 and 6.68,respectively,under which a 90% phosphorus recovery could be realized..