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Optimized design of a novel filter brick in denitrification deep-bed filter

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Abstract

Denitrification deep-bed filter has been widely applied in the field of advanced wastewater treatment, yet its efficient operation is highly dependent on the filter bricks-controlled water and air distribution system. Considering the restrictions of existing bricks such as poor hydraulic properties and large non-working area during backwashing, a cuboid novel filter brick with two internal distribution chambers was designed and its hydraulic behaviors under three conditions (air washing, water and air joint backwashing, water washing) were simulated using computational fluid dynamic (CFD) analysis. Results showed that the uniformity of fluid velocity distribution was better than that of the conventional brick under two hydraulic conditions, especially in water and air joint backwashing process with a 10% promotion of water and air distribution uniformity. Furthermore, a 30-day engineering validation test was also carried out to testify the actual performance of the novel filter brick. Better performance was testified in the filters with novel bricks. The present study showed that the novel filter brick had a better uniformity of water and air distribution and smaller dead zone area than those of the conventional brick, implying a good feasibility of application in denitrification deep-bed filter.

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Acknowledgements

This research was supported by National Science and Technology Major Project (2017ZX07204001) and Jiangsu Science and Technology Projects of China (BE2018632, BE2017632 and BA2016012).

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Authors and Affiliations

  1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, N.O.163, Xianlin Avenue, Qixia District, Nanjing, 210023, Jiangsu, People’s Republic of China

    Hui Huang, Chong Peng & Hongqiang Ren

  2. Jiangsu Zhongyijinda Institute of Environmental Industry Technology CO., LTD., Yixing, 214200, Jiangsu, People’s Republic of China

    Hui Huang, Kai Li & Hongqiang Ren

  3. Yixing Environmental Research Institute of Nanjing University, Yixing, 214200, Jiangsu, People’s Republic of China

    Hui Huang, Qing Wang & Hongqiang Ren

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  1. Hui Huang
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  2. Chong Peng
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  3. Kai Li
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  4. Qing Wang
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  5. Hongqiang Ren
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Correspondence to Hui Huang.

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Huang, H., Peng, C., Li, K. et al. Optimized design of a novel filter brick in denitrification deep-bed filter. Bioprocess Biosyst Eng 42, 1701–1710 (2019). https://doi.org/10.1007/s00449-019-02166-x

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  • DOI: https://doi.org/10.1007/s00449-019-02166-x

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