实验室模拟条件下鸟粪石形式回收磷的反应条件优化  

Optimization of Reaction Conditions for Phosphorus Recovery from Struvite under Laboratory Simulation

作　　者：王宇珊[1] 曾军 曾庆满 廖振奕 施晨逸 韦献革 孙连鹏[1] 

机构地区：[1]中山大学环境科学与工程学院,广东广州510275 [2]瀚蓝环境股份有限公司,广东佛山528200 [3]广东省城市水循环与水质安全保障技术企业重点实验室(产学研)培育基地,广东佛山528200

出　　处：《净水技术》2016年第5期58-62,共5页Water Purification Technology

基　　金：广东省城市水循环与水质安全保障技术企业重点实验室开放基金项目;中山大学先进技术研究院项目(900353283324)

摘　　要：该试验采用模拟配水,在无其他干扰条件下研究氮磷比、镁磷比和pH三个关键影响因素对鸟粪石结晶的影响。试验结果表明,pH越高,磷去除率越高,但生成沉淀中鸟粪石纯度不一定越高。综合磷去除效果以及鸟粪石纯度,当pH为8.8、n(N)∶n(P)∶n(Mg)为1.3∶1∶1.5时,磷去除率可达82.09%,沉淀物中鸟粪石含量高达99%,该条件下的沉淀结晶在扫描电镜观察下大部分呈现斜方形,与鸟粪石典型形貌一致,故该条件为鸟粪石结晶回收磷的较优化的条件。The study focused on the effects of different N∶ P rate,Mg∶ P rate and pH towards struvite crystallization without any disturbance,which could give reference for further research. The results show that higher removal rates of phosphorus is associated with higher pH which is not good for higher struvite purity. When the molar ratio of NH^＋4 ,PO4^3- and Mg^2＋ is 1. 3∶ 1∶ 1. 5 and pH is 8. 8, phosphorus removal of 82. 09% is obtained and struvite purity reach up to 99% . By this condition,most precipitate observed by SEM is cube which is morphologically smilar to struvite. So the conditions can be the optimum conditions to phosphorous recovery from struvite.

关 键 词：鸟粪石 磷回收 PH值 最优条件 实验室模拟 

分 类 号：TQ115[化学工程—无机化工]