An Fang-Jiao, Peng Yong-Zhen, Dong Zhi-Long, Shao Zhao-Wei, Zhao Zhi-Chao, Huang Jian-Ming, Chen Yong-Zhi
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, Beijing University of Technology, Beijing 100124, China.
Huan Jing Ke Xue. 2018 Jun 8;39(6):2770-2777. doi: 10.13227/j.hjkx.201711120.
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 NH-N and NO-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 NO-N of (30±0.2)mg·L. The substrate ratio (NO-N/NH-N) increased from 0.9 to 1.4.However, the removal efficiency of NH-N was affected negligibly, and the average removal efficiency of NO-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 NH-N and NO-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 NH-N and NO-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 NH-N and NO-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 NO-N/NH-N equal to 1.4.
在实验室规模的厌氧氨氧化反应器（ASBR）中处理模拟生活污水时，研究了低底物比、冷却方式和pH对脱氮性能的影响。结果表明，在温度为30℃、进水NO-N浓度为（30±0.2）mg·L时，NH-N和NO-N的平均去除效率分别从54.4%和65.3%提高到95.8%和92.5%。底物比（NO-N/NH-N）从0.9增加到1.4。然而，NH-N的去除效率受影响可忽略不计，当底物比增加到1.6时，NO-N的平均去除效率降至54.6%，这表明当底物比接近理论值1.32时，厌氧氨氧化的脱氮性能最佳。当反应器温度从30℃一次性降至15℃时，NH-N和NO-N的平均去除效率分别从97.5%和98.5%降至35.2%和40.1%。当采用阶梯冷却法（30℃→25℃→20℃→15℃）时，NH-N和NO-N的平均去除效率分别从97.7%和98.6%降至52.7%和62.4%。当pH从7.7逐渐增加到8.5时，NH-N和NO-N的平均去除效率先升高后降低。当pH控制在8.3、底物比NO-N/NH-N等于1.4时，脱氮效率最高。
