环境工程学报2013，Vol.7Issue(1)：19-25,7.
赤泥晶种法诱导磷酸铵镁结晶回收模拟废水中磷的可行性研究
Feasibility study on phosphate recovery as struvite from synthetic wastewater by red mud-seeded crystallization
摘要
Abstract
The physical and chemical properties of red mud were analyzed, and the effects of process conditions on the crystallization of magnesium ammonium phosphate (MAP) for phosphorus recovery from synthetic wastewater with red mud as a seed crystal, were investigated. The results showed that the red mud used is non-porous or macroporous material. The red mud could give out alkaline liquor and ions in solution. The main compositions of red mud were Ca, Al, Si, Mg, etc. The red mud as seed crystal benefited the process of MAP crystallization. Under the conditions of initial phosphate concentration of 90 mg/L, N: Ma: P molar ratio of 1: 1: 1, without pH value controlling, stirring time of 30 min, stirring speed of 180 rpm, and precipitation time of 30 min, the 60～80 mesh of red mud and 8 g/L seed dosage were preferable conditions for phosphorus recovery. The reuse of red mud seed crystal had little effect on phosphorus recovery. The product could be an efficient slow release fertilizer.关键词
赤泥/结晶法/晶种/磷回收/磷酸铵镁(MAP)Key words
red mud/ crystallization/ seed crystal/ phosphorus recovery/ magnesium ammonium phosphate (MAP)分类
资源环境引用本文复制引用
胡怡,宋永会,钱锋..赤泥晶种法诱导磷酸铵镁结晶回收模拟废水中磷的可行性研究[J].环境工程学报,2013,7(1):19-25,7.基金项目
国家自然科学基金资助项目(51078339,50678162) （51078339,50678162）
