| Autor: |
Hong-jie Wang, Ting Li, Qian Zhang, Wenyi Dong, Jin-nan Lin |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
2011 5th International Conference on Bioinformatics and Biomedical Engineering. |
| DOI: |
10.1109/icbbe.2011.5781013 |
| Popis: |
Air-upflow velocity is a critical factor in the design and operation of the Biological Aerated Filter (BAFs)., in order to achieve optimal performance. The performance of a pilot-scale upflow biofilters filled with ceramsite in the municipal wastewater treatment was investigated over a wide range of air-upflow rates from 5.4 to 27 m/hr. Results from long-term operation of the BAF system indicate that the air-upflow velocity can affect the removal of pollutants, as well as the backwashing period. The growth of the air-upflow velocity improved the efficiency of the COD and NH4+-N removal. But its growth is not always good for the TN removal when the air-upflow velocity was above 16.2 m/hr. SS removal rate deteriorated with the rising of the air upflow velocity, due to the air-scouring. The backwashing period enlarged from 24 to 48 hours as the air-upflow velocity increased from 5.4 to 27 m/hr. It was suggested the effective BAF controlled air-upflow velocity for pollutant removel and applicable back washing period is approximate 16.2 m/hr. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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