| Fe(0)-活性炭强化短程反硝化脱氮及影响因素 |
| 摘要点击 1402 全文点击 600 投稿时间：2016-11-07 修订日期：2016-12-06 |
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| 中文关键词 零价铁 活性炭 短程反硝化 铁碳比 pH |
| 英文关键词 zero valence iron activated carbon short-cut denitrification Fe/C mass ratio pH |
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| 中文摘要 |
| 为减少生物短程反硝化对外碳源的依赖，研究了无机环境下Fe(0)-活性炭强化短程反硝化的脱氮效果，并探究了不同铁碳比及初始pH值对系统脱氮效果及N2O释放的影响.结果表明Fe(0)-活性炭可强化生物短程反硝化，将亚硝氮去除率由7.4%提高到31.1%.当m（铁）：m（碳）由2：1降至1：1和1：2时，反硝化速率与亚硝氮去除率均呈现先升后降的趋势，m（铁）：m（碳）为1：1时达到最大，分别为5.58 mg·（g·h）-1与41.1%，且此时N2O的释放量较小，为0.10 mg.当pH值由6.0升至9.0的过程中，反硝化速率由7.39 mg·（g·h）-1下降至5.96 mg·（g·h）-1，N2O的释放量由0.19 mg下降至0.12 mg.以上结果表明，在m（铁）：m（碳）为1：1和pH为弱酸性的条件下，Fe(0)-活性炭能强化短程反硝化获得较好的脱氮效果，但低pH值会增加N2O的释放量. |
| 英文摘要 |
| In order to reduce the carbon source for biological short-cut denitrification, Fe(0)-activated carbon was used to enhance nitrogen removal in the absence of organic carbon, and the influences of the Fe/C mass ratio and initial pH value on the nitrogen removal efficiency were explored. The results showed that the nitrite removal efficiency increased from 7.4% to 31.1% when the Fe(0)-activated carbon was used to enhance short-cut denitrification. When the Fe/C mass ratio was reduced from 2:1 to 1:1 and 1:2, both the denitrification rate and nitrite removal efficiency first increased and then decreased. At a Fe/C mass ratio of 1:1, a maximum denitrification rate of 5.58 mg·(g·h)-1 and a maximum nitrite removal efficiency of 41.1% were achieved, respectively, and 0.1 mg of nitrous oxide was emitted. When the pH value was increased from 6.0 to 9.0, the denitrification rate decreased from 7.39 to 5.96 mg·(g·h)-1, and the nitrous oxide emission decreased from 0.19 to 0.12 mg. Therefore, a higher nitrogen removal efficiency could be achieved by Fe(0)-activated at a Fe/C mass ratio of 1:1 and pH value of 6.0. However, more nitrous oxide would be emitted at a low pH value. |
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