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| 苦土和氧化镁处理氮磷废水的对比研究 | |
| 引用本文： | 陈晓流,曹敏,刘云,郝火凡,董元华.苦土和氧化镁处理氮磷废水的对比研究[J].环境工程学报,2012,6(4):1176-1182. |
| 作者姓名： | 陈晓流 曹敏 刘云 郝火凡 董元华 |
| 作者单位： | 1. 兰州交通大学环境与市政工程学院,兰州730070／中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京210008 2. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京,210008 3. 兰州交通大学环境与市政工程学院,兰州,730070 |
| 基金项目： | 江苏省自然科学基金资助项目（BK2008499）；国家自然科学基金资助项目（20907058） |
| 摘 要： | 分别采用苦土、纯氧化镁为沉淀剂对模拟高浓度氮磷废水(N/P=0.8)进行了脱氮除磷研究,比较了沉淀剂投加量、pH对2种沉淀剂处理氮磷废水的影响,对沉淀产物进行XRD分析,并进行了经济效益比较。结果表明,pH是影响2种沉淀剂处理氮磷废水的主要因素,随着pH的增加,脱氮除磷效果提高,在平衡pH为9～10之间时氮磷处理效果最佳,pH继续增加,由于磷酸镁沉淀的形成使得氨氮去除率降低。此外,处理相同的废水,苦土的最佳投加量要大于纯氧化镁,但是经济效益比较结果表明,以苦土为沉淀剂处理氮磷废水可大大降低处理成本。 |
| 关 键 词： | 苦土 氧化镁 氮 磷 废水 |
Comparison of magnesia and pure magnesium oxide to remove nitrogen and phosphorus from wastewater |
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| Chen Xiaoliu,Cao Min,Liu Yun,Hao Huofan and Dong Yuanhua.Comparison of magnesia and pure magnesium oxide to remove nitrogen and phosphorus from wastewater[J].Techniques and Equipment for Environmental Pollution Control,2012,6(4):1176-1182. | |
| Authors: | Chen Xiaoliu Cao Min Liu Yun Hao Huofan and Dong Yuanhua |
| Institution: | 1.School of Environmental & Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China; 2.State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China) |
| Abstract: | Industrial calcined magnesite powder was compared with pure magnesium oxide for phosphate and ammonium nitrogen removal to struvite at a molar N∶ P ratio of 0.8 from wastewater.The optimal pH and solid dosage were studied.The precipitates obtained were analyzed by X-ray diffraction.The results showed that pH plays an important role in the removal of phosphate and ammonium nitrogen from wastewater,with removal being more efficient in the pH region from 9 to 10.Although the dosage of industrial calcined magnesite powder needed is greater than that of pure magnesium oxide,it has considerable economic advantages. |
| Keywords: | magnesia pure magnesium oxide nitrogen phosphorus wastewater |
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