| C/N比对反硝化过程中亚硝酸盐积累的影响分析 |
| 摘要点击 2445 全文点击 1313 投稿时间：2012-07-05 修订日期：2012-10-16 |
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| 中文关键词 半反硝化 亚硝酸盐积累 SBR反应器 |
| 英文关键词 partial denitrification nitrite accumulation sequencing batch reactor(SBR) |
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| 中文摘要 |
| 在SBR反应器中利用乙酸钠为底物,研究C/N(COD/NO3--N)比对反硝化过程中亚硝酸盐积累的影响. 在SBR连续运行过程中(HRT为6 h),C/N比为3时,亚硝酸盐积累率可达45%. 批式处理研究表明,C/N比为2.5和3.0时 亚硝酸盐的积累率较高,分别为47.50%±1.005%和45.28%±5.469%. C/N比为2.5时获得的亚硝酸盐比积累速率为(30.17±1.70)mg·(g·h)-1,C/N比为3时获得的亚硝酸盐比积累速率为(29.92±1.90)mg·(g·h)-1. C/N比在2.5~4范围内时,C/N比对硝酸盐的还原速率基本无影响,但对亚硝酸盐的积累速率影响显著,C/N比为2.5和3.0时有利于亚硝酸盐的积累,C/N比≥3.5时,亚硝酸盐积累率下降显著. |
| 英文摘要 |
| Effect of C/N (COD/NO3--N) ratio on nitrite accumulation during denitrification process was investigated in a sequencing batch reactor (SBR) with acetic sodium as the electron donor. The nitrite accumulation ratio was 45% at a C/N ratio of 3 during operation in SBR with HRT at 6 h. According to the results of batch experiments, Nitrite accumulation ratios were higher at C/N ratios of 2.5 and 3.0, and the values were 47.50%±1.005% and 45.28%±5.469%,respectively. The nitrite specific accumulation rate was (30.17±1.70) mg·(g·h)-1 at a C/N ratio of 2.5, and was (29.92±1.90) mg·(g·h)-1 at a C/N ratio of 3.0. C/N ratios of 2.5-4.0 did not affect the nitrate reduction rate but obviously affected the nitrite accumulation rate. C/N ratios of 2.5 and 3.0 were favorable for nitrite accumulation, and a C/N ratio≥3.5 would lead to decrease in nitrite accumulation(SBR). |
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