超声强化鸟粪石结晶过程及磷的回收研究  

Effect of Ultrasound Enhancement on the Recovery of Phosphorus via Struvite Crystallization Process

作　　者：关乾 郑文婕 孙彩霞 陈阳芷 周磊 刘家印 GUAN Qian;ZHENG Wenjie;SUN Caixia;CHEN Yangzhi;ZHOU Lei;LIU Jiayin(School of Environmental and Chemical Engineering,Nanchang Hangkong University;School of International Educational,Nanchang Hangkong University;School of Civil Engineering and Architecture,Nanchang Hangkong University:Nanchang 330063,China)

机构地区：[1]南昌航空大学环境与化学工程学院 [2]南昌航空大学国际教育学院 [3]南昌航空大学土木工程学院,江西南昌330063

出　　处：《水处理技术》2022年第3期84-87,共4页Technology of Water Treatment

基　　金：国家自然科学基金(51768046);南昌航空大学研究生创新专项资金资助(YC2020013)。

摘　　要：使用超声辅助磷酸铵镁结晶过程以提升废水中磷的回收效率。本文在研究了搅拌转速对空化效果影响的基础上,又深入研究了声能密度和施加时间对磷去除的影响,确定了最佳的反应参数,当n(Mg):n(P)为1.4:1,pH为9.5,搅拌转数为300 r/min,声能密度为0.8 W/cm^(3)且施加15 min超声时,磷的去除率可以达到94.1%。通过分析了超声对磷酸铵镁结晶过程的机理,发现超声产生的空化气泡会使磷酸铵镁结晶过程从均相成核变成异相成核,这有利于促进反应结晶过程。The application of ultrasound to improve the recovery efficiency of phosphorus via the magnesium ammonium phosphate crystallization process in wastewater.In this paper,the effect of stirring speed on the ultrasonic cavitation was studied,the influence of ultrasound energy density and application time on phosphorus removal was further studied,then the optimal operating parameters were determined.When n(Mg):n(P) molar ratio of1.4:1:1,pH=9.5,stirring speed of 300 r/min,ultrasound energy density of 0.8 W/cm^(3),and ultrasonic time of 15 mins,the removal efficiency of phosphorus can reach 94.1%.By analyzing the mechanism of the ultrasound magnesium ammonium phosphate crystallization process,the results revealed that the cavitation bubbles generated by ultrasonic will change the magnesium ammonium phosphate crystallization process from homogeneous nucleation to heterogeneous nucleation,which is beneficial to improve the reaction crystallization process.

关 键 词：磷酸铵镁结晶 厌氧生化废水 超声 空化气泡 

分 类 号：X703[环境科学与工程—环境工程]