| 温度对污水脱氮系统污染物去除效果及氧化亚氮释放的影响 |
| 摘要点击 4491 全文点击 2391 投稿时间：2011-06-13 修订日期：2011-08-01 |
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| 中文关键词 温度 氧化亚氮 污水生物脱氮 硝化反硝化 anoxic-oxic sequencing batch reactors (A/O SBRs) |
| 英文关键词 temperature nitrous oxide biological nitrogen removal nitrification and denitrification anoxic-oxic sequencing batch reactors (A/O SBRs) |
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| 中文摘要 |
| 污水生物脱氮过程是大气中的氧化亚氮(N2O)的一个重要来源.以anoxic-oxic sequencing batch reactors(A/O SBRs)工艺为研究对象,考察了5组不同温度(10、20、25、30、35℃)条件下系统的污染物去除效果和氧化亚氮释放情况.结果表明,温度对COD的去除无显著影响,但对氮素的去除有明显影响:在一定范围内,随温度的升高氮的去除率升高,但温度超过25℃后,随着温度的上升氮的去除效果下降; 温度对氧化亚氮的释放量有重要影响,随温度的升高氧化亚氮的释放量逐渐降低 [释放量(以MLSS计)依次为:530.1、260.8、218.3、104.7、57.7 μg·g-1].对于A/O SBRs工艺,氧化亚氮的释放主要集中的好氧段,缺氧段几乎无氧化亚氮释放. |
| 英文摘要 |
| Biological nitrogen removal system is a significant source of nitrous oxide (N2O). The effect of temperature (10,20,25,30,35℃) on the pollutant removal efficiencies and N2O emission characteristics of lab-scale A/O SBRs wastewater treatment process was evaluated. Results showed that temperature have no significant effect on the removal of COD while have a significant effect on the removal of nitrogen. During a certain range, as the temperature increasing the nitrogen removal rate increased. The nitrogen removal increased with the increase of temperature when it was below 25℃ and decreased with the increase of temperature when it was above 25℃. Significant impact of temperature on the N2O emission was also observed. N2O emission decreased with the increase of temperature (N2O emission: 530.1、260.8、218.3、104.7、57.7 μg·g-1). For a lab-scale A/O SBRs treating wastewater, most of the N2O was produced during the aerobic phase, while no significant N2O emission can be detected during the oxide phase. |
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