| Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition简 |
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| 作者姓名： | Xin-lei ZHAO Liang ZHU Shi-jie BAI Ming ZHOU Jing QIAN Wei WU |
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| 基金项目： | This work was supported by the Major Science and Technology Program for Water Pollution Control and Treatment of China （Grant No. 2009ZX07317）. |
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| 摘 要： | An experiment was carried out to investigate the anti-ammonium shock load capacity of a biological aerated filter （BAF） composed of a double-layer bed. This bed was made up of a top layer of ceramic and a bottom layer of zeolite. The experiment shows that the anti-ammonium shock load process can be divided into two processes： adsorption and release. In the adsorption process, the total removal efficiency of ammonia nitrogen by zeolite and ceramic was 94%. In the release process, the ammonia nitrogen concentration increased significantly and then gradually returned to the normal level four hours after the shock load. The results indicated that the double-layer BAF had a high level of adaptability to the short-term ammonium shock load and long-term operation. The main factors influencing the dynamic process of ammonia nitrogen adsorption were the filter bed height, ammonia nitrogen concentration of influent, and flow rate. The bed depth service time （BDST） model was used to predict the relationship between the filter bed height and breakthrough time at different flow rates, and the results are reliable.
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| 关 键 词： | BAF 载荷条件 陶瓷 沸石 氨氮浓度 铵 性能 介质 |
| 收稿时间： | 11 November 2012 |
Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition |
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| Xin-lei ZHAO Liang ZHU Shi-jie BAI Ming ZHOU Jing QIAN Wei WU.Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition[J].Water Science and Engineering,2014,7(1):81-89. |
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| Authors: | Xin-lei ZHAO Liang ZHU Shi-jie BAI Ming ZHOU Jing QIAN Wei WU |
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| Affiliation: | [1]College of Environment, Hohai University, Nanjing 210098, P. R. China [2]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China [3]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, Hohai University, Nanjing 210098, P. R, China [4]Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003, P. R. China [5]Wujin Water Resources Bureau, Changzhou 213172, P. R. China |
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| Abstract: | An experiment was carried out to investigate the anti-ammonium shock load capacity of a biological aerated filter (BAF) composed of a double-layer bed. This bed was made up of a top layer of ceramic and a bottom layer of zeolite. The experiment shows that the anti-ammonium shock load process can be divided into two processes: adsorption and release. In the adsorption process, the total removal efficiency of ammonia nitrogen by zeolite and ceramic was 94%. In the release process, the ammonia nitrogen concentration increased significantly and then gradually returned to the normal level four hours after the shock load. The results indicated that the double-layer BAF had a high level of adaptability to the short-term ammonium shock load and long-term operation. The main factors influencing the dynamic process of ammonia nitrogen adsorption were the filter bed height, ammonia nitrogen concentration of influent, and flow rate. The bed depth service time (BDST) model was used to predict the relationship between the filter bed height and breakthrough time at different flow rates, and the results are reliable. |
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| Keywords: | biological aerated filter （BAF） zeolite ceramic ammonia nitrogen shock load dynamic adsorption |
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