| 不同运行策略下厌氧氨氧化的脱氮性能 |
| 摘要点击 1976 全文点击 1746 投稿时间：2017-11-14 修订日期：2017-11-30 |
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| 中文关键词 厌氧氨氧化 基质比 降温方式 pH 生物脱氮 |
| 英文关键词 anaerobic ammonia oxidation (ANAMMOX) substrate ratio cooling methods pH biological nitrogen removal |
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| 中文摘要 |
| 采用厌氧氨氧化反应器（ASBR）处理模拟生活污水，考察低基质比、降温方式及pH对系统脱氮性能的影响.结果表明，温度为30℃时，控制进水NO2--N浓度为（30±0.2）mg·L-1，基质比（NO2--N/NH4+-N）由0.9升至1.4，系统NH4+-N和NO2--N去除率均值分别从54.4%和65.3%升至95.8%和92.5%；当基质比继续升高至1.6时，NH4+-N去除率基本不变，而NO2--N去除率降至54.6%，即基质比接近理论值1.32时，其厌氧氨氧化脱氮性能较强.当反应温度一次性从30℃降低至15℃时，NH4+-N和NO2--N的去除率由97.5%和98.5%分别降至35.2%和40.1%，当采用阶梯式降温方式（30℃→25℃→20℃→15℃）时，NH4+-N和NO2--N的去除率分别由97.7%和98.6%逐渐降至52.7%和62.4%.控制NO2--N/NH4+-N为1.4，逐步升高pH由7.7至8.5时，NH4+-N和NO2--N的去除率先增大后减小，当pH为8.3时系统脱氮性能最佳. |
| 英文摘要 |
| The effects of low substrate ratio, cooling methods, and pH on nitrogen removal performance were studied in a laboratory-scale anaerobic ammonium oxidation reactor (ASBR) while treating simulated domestic waste water. The results illustrated that the average removal efficiencies of NH4+-N and NO2--N increased from 54.4% and 65.3% to 95.8% and 92.5%, respectively, at a temperature of 30℃ and an influent concentration of NO2--N of (30±0.2)mg·L-1. The substrate ratio (NO2--N/NH4+-N) increased from 0.9 to 1.4.However, the removal efficiency of NH4+-N was affected negligibly, and the average removal efficiency of NO2--N decreased to 54.6% when the substrate ratio was increased to 1.6, suggesting that the nitrogen removal performance of anaerobic ammonium oxidation was best when the substrate ratio was close to the theoretical value of 1.32.The average removal efficiencies of NH4+-N and NO2--N decreased from 97.5% and 98.5% to 35.2% and 40.1%, respectively, when the temperature of the reactor dropped from 30℃ to 15℃ at one time. The average removal efficiencies of NH4+-N and NO2--N dropped from 97.7% and 98.6% to 52.7% and 62.4%, respectively, when the ladder cooling method(30℃→25℃→20℃→15℃) was used. The average removal efficiencies of NH4+-N and NO2--N increased initially and then decreased when the pH was increased gradually from 7.7 to 8.5.The highest nitrogen removal efficiency was achieved when the pH was controlled at 8.3 with a substrate ratio of NO2--N/NH4+-N equal to 1.4. |
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