Volume 7 Issue 1
Jan.  2014
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Article Navigation >  Water Science and Engineering  > 2014  >  7(1): 81-89
Xin-lei ZHAO, Liang ZHU, Shi-jie BAI, Ming ZHOU, Jing QIAN, Wei WU. 2014: Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition. Water Science and Engineering, 7(1): 81-89. doi: 10.3882/j.issn.1674-2370.2014.01.009
Citation: Xin-lei ZHAO, Liang ZHU, Shi-jie BAI, Ming ZHOU, Jing QIAN, Wei WU. 2014: Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition. Water Science and Engineering, 7(1): 81-89. doi: 10.3882/j.issn.1674-2370.2014.01.009
shu

Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition

doi: 10.3882/j.issn.1674-2370.2014.01.009
  • 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.

Funds:  This work was supported by the Major Science and Technology Program for Water Pollution Control and Treatment of China (Grant No. 2009ZX07317).
More Information
  • Corresponding author: Liang ZHU
  • Received Date: 2012-11-11
  • Rev Recd Date: 2013-03-09
    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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