| 外源甜菜碱投加增强高盐废水厌氧氨氧化脱氮性能 |
| 摘要点击 1422 全文点击 1056 投稿时间：2017-06-04 修订日期：2017-09-19 |
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| 中文关键词 高盐废水 厌氧氨氧化 甜菜碱 盐胁迫 脱氮 |
| 英文关键词 high saline wasterwater anaerobic ammonium oxidation(ANAMMOX) betaine salt stress nitrogen removal |
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| 中文摘要 |
| 废水因含盐量高而导致其生物处理效率降低，对于如何提高高盐环境下的生物处理效率已成为目前的研究热点.采用厌氧氨氧化工艺处理高盐废水，以不同甜菜碱浓度对厌氧氨氧化脱氮效能为研究对象，探讨了甜菜碱对厌氧氨氧化脱氮效能的影响.结果表明：①投加甜菜碱对系统脱氮效能有明显的改善作用，甜菜碱浓度为0.1~0.4 mmol·L-1时，添加甜菜碱缓解了盐胁迫对厌氧氨氧化菌生长的抑制，也促进了反硝化菌的生长；甜菜碱浓度为0.4~0.5 mmol·L-1时，推测反硝化菌为优势菌群，但对总氮去除表现为促进作用.甜菜碱浓度大于0.5 mmol·L-1后，添加甜菜碱已无法缓解盐胁迫对反应器脱氮效能的抑制，最终在甜菜碱浓度0.8 mmol·L-1时对反应器产生完全抑制.②甜菜碱的添加浓度为0.3 mmol·L-1时，反应去除效能达到最佳，NH4+-N和NO2--N分别提升了16%和32%，NRR提升了26.8%.③在最后的恢复试验中，随着甜菜碱浓度的降低反应器脱氮效能得到快速恢复，NH4+-N恢复到50.6%，NO2--N平均去除率为63.7%，NRR恢复到0.65 kg·（m3·d）-1，这说明甜菜碱对反应器的影响是可逆的. |
| 英文摘要 |
| High salt content could result in the inhibition of microbes and affect biological treatment processes. At present, an important research topic is how to improve the efficiency of biological treatments. The anaerobic ammonia oxidation (ANAMMOX) process was used to treat high saline wastewater. Nitrogen removal performance with betaine was studied by analyzing the ANAMMOX activity, and ammonia nitrogen and nitrate nitrogen removal. The results showed that:① It has obvious improvement when betaine concentration was 0.1-0.4 mmol·L-1. It alleviated the salt stress on bacteria growth inhibition of ANAMMOX, and also promoted the growth of denitrifying bacteria. When betaine concentration was 0.4-0.5 mmol·L-1, denitrifying bacteria was found to have grown greatly. When betaine concentration was greater than 0.5 mmol·L-1, it was unable to alleviate the salt stress inhibiting denitrification efficiency. As a result, betaine concentration of 0.8 mmol·L-1 completely inhibited bacteria. ② When concentration of betaine was 0.3 mmol·L-1, the optimal nitrogen removal efficiency was achieved. NH4+-N and NO2--N increased by 16% and 32%, respectively. Nitrogen removal rate (NRR) increased by 26.8%. ③ At the end of the recovery experiment, with the decreasing concentrations of betaine, NH4+-N was 50.6%, NO2--N was 63.7%, and NRR was 0.65 kg·(m3·d)-1, so the nitrogen removal efficiency underwent fast recovery. |
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