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| 磷酸铵镁法去除回收小苏打水生产废水氨氮的研究 |
| Research on the removal and recovery of ammonia from the production wastewater of sodium bicarbonate using the magnesium ammonium phosphate method. |
| 投稿时间：2024-12-24 修订日期：2025-01-17 |
| DOI： |
| 中文关键词: 高浓度氨氮废水 磷酸铵镁 去除率 影响因素 氨氮去除动力学 |
| 英文关键词:High-concentration ammonia nitrogen wastewater Magnesium ammonium phosphate Removal rate Influencing factors Ammonia nitrogen removal kinetics |
| 基金项目:国家自然科学基金面上项目 |
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| 摘要点击次数: 3 |
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| 中文摘要: |
| 小苏打生产企业产生的高浓度氨氮废水不仅对水体造成严重污染并且浪费大量氨氮资源。磷酸铵镁沉淀法可高效将废水中的氨氮去除并转化为有经济价值的复合肥料。为探究该方法处理不同氨氮浓度废水的适用性,本研究系统性地分析了初始氨氮浓度(500~20000 mg/L)、pH值(7~11)、n(N):n(Mg):n(P)、反应时间(5~50 min)、静置时间(5~50 min)、转速(0~300 rpm/min)对氨氮去除效率及固相产物结构的影响。研究结果表明,当n(N):n(Mg):n(P)为1:1.2:1时,磷酸铵镁沉淀法可在20 min内将弱碱性(pH 9)水质中92.17%的氨氮(20000 mg/L)转化为磷酸铵镁沉淀,且氨氮去除的过程均具有较高的一级动力学速率常数(0.1124~0.1179 min-1)。针对小苏打工艺废水,磷酸铵镁沉淀法同样可在20 min将弱碱性(pH 9)水质水中91.74%的氨氮(2300 mg/L)转化为磷酸铵镁,且具有较高的经济效益(7.77元/吨废水)。 |
| 英文摘要: |
| The high-concentration ammonia nitrogen wastewater produced by sodium bicarbonate manufacturers not only causes serious pollution to the water bodies but also wastes a large amount of ammonia nitrogen resources. The magnesium ammonium phosphate precipitation method can efficiently remove ammonia nitrogen from the wastewater and convert it into valuable compound fertilizers. To explore the applicability of this method for treating wastewater with different concentrations of ammonia nitrogen, this study systematically analyzed the effects of initial ammonia nitrogen concentration (500~20000 mg/L), pH value (7~11), n(N):n(Mg):n(P) ratio, reaction time (5~50 min), settling time (5~50 min), and rotation speed (0~300 rpm/min) on the efficiency of ammonia nitrogen removal and the structure of the solid phase products. The research results indicate that when the n(N):n(Mg):n(P) ratio is 1:1.2:1, the magnesium ammonium phosphate precipitation method can convert 92.17% of the ammonia nitrogen (20000 mg/L) i |
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