| 储存尿液电化学法脱氮的影响因素 |
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| 作者姓名： | 臧海兴 胡正义 刘小宁 温国期 |
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| 作者单位： | 中国科学院大学, 北京 100049 |
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| 基金项目： | 国家科技支撑计划项目(2012BAJ24B06-2B)资助 |
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| 摘 要： | 生活污水中约80%的氨氮来自尿液,收集尿液并脱氮处理可极大减轻生活污水处理负荷.本实验用Ti/Ru O2-Ti O2电极作为阳极,不锈钢板作为阴极,在有机玻璃电解槽中研究考察电流密度(20~100 m A/cm2)、储存尿液初始p H(9~12)以及Na Cl投加量(4~16 g/L)对储存尿液(250 m L)的脱氮效果.结果表明,最佳脱氮工艺参数为:电流密度80 m A/cm2,初始p H在11左右,Na Cl投加量为8 g/L,电解时间达到270 min.在此最优化条件下,氨氮和总氮的去除率分别是91.83%和88.34%;处理1 L尿液消耗0.311 k W·h电能.可见,该方法具有快速、低能耗、高效优点,在源分离尿液氮处理方面具有应用前景.
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| 收稿时间： | 2014-09-22 |
| 修稿时间： | 2015-03-23 |
Influence factors of electrochemical removal of nitrogen from stored urine |
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| Authors: | ZANG Haixing HU Zhengyi LIU Xiaoning WEN Guoqi |
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| Institution: | University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | About 80% of ammonia in municipal wastewater comes from urine. In the present study, Ti/RuO2-TiO2 anode and stainless steel cathode were used in the nitrogen removal process of stored urine. The operating variables in the electrochemical nitrogen removal including the current density (20-100 mA/cm2), initial pH (9-12), and sodium chloride dosage (4-16 g/L) were considered to be the influence factors on the nitrogen removal. The the most effective electrochemical process was observed when utilizing a current density at about 80 mA/cm2, initial pH at about 11, and sodium chloride dosage at about 8 g/L. Under the optimum conditions the removal rates of ammonia and total nitrogen were 91.83% and 88.34%,erspectively, and the reaction time was 270 min. A total of 0.311 kW·h energy was consumed for treating 1 L of stored urine. This process was rapid and efficient with low cost, and it would have promising applications in removal of nitrogen in stored urine. |
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