| K+强化高盐环境下厌氧氨氧化脱氮效能 |
| 摘要点击 2832 全文点击 798 投稿时间：2016-12-30 修订日期：2017-01-15 |
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| 中文关键词 高盐废水 厌氧氨氧化 钾盐 脱氮效能 促进作用 抑制作用 |
| 英文关键词 saline wastewater ANAMMOX potassium nitrogen removal performance promoting effect inhibiting effect |
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| 中文摘要 |
| 针对含盐废水生物脱氮效能较低的问题，采用厌氧序批式反应器研究了K+浓度变化对厌氧氨氧化污泥脱氮效能的影响.结果表明，适量的K+可有效的提升反应器脱氮效能，K+对厌氧氨氧化污泥脱氮效能的影响主要分为4个阶段：适应阶段，K+浓度为（0~2 mmol·L-1），K+的突然添加破坏了原有反应平衡，但最终厌氧氨氧化菌适应了K+的存在，由于K+还未对厌氧氨氧化菌产生明显效果，NH4+-N和NO2--N去除率略有上升；活性提升阶段（2~8 mmol·L-1），K+对厌氧氨氧化生物系统有促进作用，随着K+浓度的提升，NH4+-N和NO2--N去除率显著提升；活性稳定阶段（8~20 mmol·L-1），厌氧氨氧化菌脱氮效能处于稳定状态，NH4+-N和NO2--N去除率虽有下降，但还是高于未添加K+时；抑制阶段（大于20 mmol·L-1），此时厌氧氨氧化菌活性降低，K+对厌氧氨氧化产生较大抑制，脱氮效能已低于0 mmol·L-1.在整个周期内K+浓度8 mmol·L-1时达到最佳去除效果，NH4+-N与NO2--N的平均去除率为89.24%和84.87%，NRR为1.113 kg·（m3·d）-1. |
| 英文摘要 |
| In view of the poor performance of biological nitrogen removal in saline wastewater treatment, nitrogen removal of anaerobic ammonium oxidation(ANAMMOX) with K+ addition was studied. The results showed that K+ addition could strengthen nitrogen removal performance. The effect of K+ on ANAMMOX process was mainly divided into four stages. In the adaptive phase(0-2 mmol·L-1), sudden addition of K+ destroyed the original equilibrium reaction, but ultimately ANAMMOX bacteria could adapt to the presence of K+. Because K+ had no obvious effects on anaerobic ammonia oxidation bacteria, the removal rates of NH4+-N and NO2--N slightly increased. In the ascension phase(2-8 mmol·L-1), K+ played a role in promoting anaerobic ammonia oxidation biological systems, with increasing concentration of K+, the removal rates of NH4+-N and NO2--N significantly increased. In the stabilization phase(8-20 mmol·L-1), the nitrogen removal rate decreased, but was still higher than the control without K+ addition. In the inhibition phase(more than 20 mmol·L-1), K+ largely inhibited anaerobic ammonia oxidation, and its denitrification efficiency was lower than 0 mmol·L-1. In the whole cycle, when the concentration of K+ was 8 mmol·L-1, it achieved the best effect, the average removal rates of NH4+-N and NO2--N were 89.24% and 84.87%, and NRR was 1.113 kg·(m3·d)-1. |
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