| 利用低品位轻烧镁粉回收废水中氮磷元素的研究 |
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| 引用本文： | 唐蕊,王俊凯,刘桂萍,段爽,王晶.利用低品位轻烧镁粉回收废水中氮磷元素的研究[J].矿产保护与利用,2018,0(2):101-106. |
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| 作者姓名： | 唐蕊 王俊凯 刘桂萍 段爽 王晶 |
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| 作者单位： | 1.沈阳化工大学 环境与安全工程学院，辽宁 沈阳 110142 |
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| 基金项目： | 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" |
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| 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。
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| 关 键 词： | 脱氮除磷 轻烧粉 磷酸铵镁 废水处理 |
| 收稿时间： | 2017-12-14 |
Recovering Nitrogen and Phosphorus from Wastewater by Low-grade Light Calcined Powder |
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| Affiliation: | 1.School of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China2.School of Pharmacy and Bioengineering, Shenyang University of Chemical Technology, Shenyang 110142, China |
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| Abstract: | Magnesium Ammonium Phosphate Process was used to treat simulated wastewater that include nitrogen and phosphorus by low-grade light calcined powder. Some factors affecting the removal efficiency of nitrogen and phosphorus were discussed, including pH, N/P ratio, low-grade light calcined powder dosage, reaction time. Results indicated that for Magnesium oxide content 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 calcined powder can effectively recover nitrogen and phosphorus elements in wastewater and there are wide application prospect in resource recycling and environmental protection. |
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