| 游离氨(FA)对氨氧化过程氨逃逸影响试验 |
| 摘要点击 4182 全文点击 1064 投稿时间：2017-05-12 修订日期：2017-06-08 |
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| 中文关键词 游离氨 氨氧化过程 短程硝化 氨逃逸 氨逃逸速率 |
| 英文关键词 free ammonia ammonia oxidation process short-range nitrification ammonia escape free ammonia escape rate |
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| 中文摘要 |
| 为探究高游离氨（FA）对氨氧化过程氨逃逸的影响.本试验采用序批式活性污泥反应器（SBR），以短程硝化污泥为研究对象，基于批次试验，考察不同FA浓度梯度下，氨氧化过程氨逃逸的变化规律.结果表明，当0.62 mg·L-1-1时，水中游离态氨（NH3）和水分子（H2O）结合，生成较稳定的NH3·H2O，几乎未发生氨逃逸.当FA浓度较高时（FA>687.1 mg·L-1），氨氮未被氧化成氧化态氮[曝气结束时氧化态氮（NOx--N）浓度<0.1 mg·L-1]，但总氮（TN）损失量却达到了269.7 mg·L-1，因此，NH3·H2O通过挥发作用使得NH3从水中逸出.在较高FA浓度条件下，氨根离子（NH4+）会以NH3形式被吹脱，从而发生氨逃逸.在226.6 mg·L-1 ≤ FA ≤ 711.8 mg·L-1范围内，氨逃逸速率（FEV）随着FA浓度的增加而增加. |
| 英文摘要 |
| This study used short process nitrification sludge to investigate the effect of high free ammonia (FA) on ammonia escape during ammonia oxidation. A sequencing batch reactor (SBR) was used to study the ammonia escape process under different FA concentrations. The results indicate that FA in water is usually combined with water molecules at lower FA concentrations to produce stable NH3·H2O with almost no ammonia escape. With high FA concentration (FA>687.1 mg·L-1), ammonia nitrogen is not oxidized to oxidized nitrogen (NO2--N concentration is <0.1 mg·L-1 at the end of aeration), but the total nitrogen (TN) reached 269.7 mg·L-1. Therefore, when there is a high FA concentration, NH4+-N will evaporate in the form of FA, resulting in ammonia escape. In addition, when 226.6 ≤ FA ≤ 711.8 mg·L-1, the free ammonia escape rate (FEV) grows rapidly with the increase in FA concentration. |
