摘要
采用磷酸铵镁(MAP)沉淀法,向模拟氮磷废水中添加低品位轻烧镁粉,研究pH值、c(N)∶c(P)、用量和反应时间等工艺条件对去除废水中氮磷元素去除效果的影响。结果表明:MgO质量分数为89%的轻烧镁粉在c(N)∶c(P)=90∶300、用量=7 g/L、pH=8、搅拌25 min的试验条件下,磷酸盐和氨氮的去除率能分别达到98.59%和89.30%。利用低品位轻烧镁粉进行MAP结晶沉淀法可有效回收废水中的氮磷元素,在资源回收利用和环境保护方面具有广阔的应用前景。
Magnesium Ammonium Phosphate Process include nitrogen and phosphorus by low - grade light removal efficiency of nitrogen and phosphorus were was used to treat simulated wastewater that calcined powder. Some factors affecting the discussed, including pH, N/P ratio, low- grade light calcined powder dosage, reaction time. Results indicated that for Magnesium oxide con- tent of 89% in light calcined powder ,when the N/P ratio was 90 ： 300, the opimal dosage was 7 g/L,the pH value was 8, and the reaction time was 25 min, the removal efficiency of nitrogen 98.59% and phosphorus 89.30% can be got. MAP precipitation method by low - grade light cal- cined powder can effectively recover nitrogen and phosphorus elements in wastewater and there are wide application prospect in resource recycling and environmental protection.
作者
唐蕊
王俊凯
刘桂萍
段爽
王晶
TANG Rui1, WANG Junkai1, LIU Guiping2, DUAN Shuang2, WANG Jing2(1. School of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China; 2. School of Pharmacy and Bioengineering, Shenyang University of Chemica Technology, Shenyang 110142, Chin)
出处
《矿产保护与利用》
2018年第2期101-106,共6页
Conservation and Utilization of Mineral Resources
基金
辽宁省海城市政府与沈阳化工大学合作项目"高效综合利用菱镁矿生产水处理剂的研究"
关键词
脱氮除磷
轻烧粉
磷酸铵镁
废水处理
the removal of nitrogen and phosphorus
light calcined powder
magnesium ammonium phosphate
wastewater treatment
