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| Titel: |
Determination of diffusion layer thickness on a biofilm |
| Auteur: |
Chen, Guang Hao Huang, Ju-Chang |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 31 (1996) nr. 2 pagina's 367-386 |
| Jaar: |
1996-02 |
| Inhoud: |
This paper has proposed two models to determine the thickness (Lo) of the diffusion layer on the biofilm surface. The first is based on the steady-state organic removal flux in a biofilm reactor, and on the bulk organic concentration when oxygen is not limiting. The model has been verified by the experimental data from a submerged RBC. This mode indicates that organic removal flux increases sharply with a decreasing Lo, especially when it is greater than 50 μm. The second model is developed by establishing a relationship between the average flow shear velocity (U) along the biofilm surface and the Lo value. This model provides a simple way for Lo determination since it only requires the measurement of the U value. A comparison of this model is made with other reported formulas in the literature. Whenever the U value is above 3 cm/s it has the same trend as reported ones. However, at a lower U, it gives a much gradual increase of Lo as compared to others. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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