鸟粪石结晶成粒技术回收污泥液中磷的中试研究  

A pilot-scale study on struvite pellet crystallization for phosphorus recovery from sludge liquor

作　　者：吴健[1] 平倩[1] 李咏梅[1] 

机构地区：[1]同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国环境科学》2017年第3期941-947,共7页China Environmental Science

基　　金：国家“863”计划项目(2011AA060902);水体污染控制与治理科技重大专项(2015ZX07306001-03)

摘　　要：为了探究鸟粪石(MAP)结晶成粒技术在实际工程中的应用条件及价值,利用鸟粪石中试反应器处理无锡某污水处理厂污泥脱水液,确定了鸟粪石结晶成粒技术回收磷的最佳工况:pH=9.0,摩尔比N:P:Mg=4:1:1.3,反应周期为4d.最佳条件下脱水液磷回收率达85%,收获的鸟粪石平均粒径为0.74mm,纯度可达98.23%.收获的MAP颗粒为规则斜方晶结构,品质较好,颗粒纯度高杂质少.经济分析表明,鸟粪石结晶成粒技术回收每吨污泥液中磷的药剂成本为0.38元.In order to investigate the application conditions and product quality of struvite（MAP） pellet crystallization technology in actual engineering, a pilot-scale MAP reactor was used to recover phosphorus from sludge liquor derived from a sewage treatment plant in Wuxi. The optimal conditions for the struvite pellet formation were confirmed as follows： pH = 9.0, N：P：Mg molar ratio =4：1： 1.3, reaction time=4d. Under the above optimal conditions, the recovery efficiency of PO_4^（3-）-P reached 85%, the average size of the harvested struvite particles was 0.74 mm, and the struvite purity reached 98.23%. The harvested struvite particles have rhombic structure and with high purity. Economic analysis indicates that the total pharmaceutical cost of struvite pellet crystallization for phosphorus recovery is 0.38yuan/t sludge liquor.

关 键 词：鸟粪石结晶成粒 中试 最佳工况 颗粒表征 经济分析 

分 类 号：X703[环境科学与工程—环境工程]