A transient mathematical model for maximum respiration activity and oxygen diffusion coefficient estimation in non-steady-state biofilms
✍ Scribed by Artem Khlebnikov; Falilou Samb; Paul Péringer
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1998
- Tongue
- English
- Weight
- 270 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0268-2575
No coin nor oath required. For personal study only.
✦ Synopsis
A transient mathematical model was established in order to evaluate oxygen di †usivity in non-steady-state bioÐlms. A submerged Ðxed bed bioÐlm system with efficient medium recirculation was investigated for ptoluenesulphonic acid degradation by Comamonas testosteroni T-2 in a multispecies bioÐlm. Static mixer elements (Sulzer Chemtech Ltd, Switzerland) were used as a support matrix for bioÐlm formation. BioÐlm respiration was estimated using the dynamic gassing-out oxygen uptake method. Based on the dissolved oxygen concentration proÐles, the oxygen di †usion coefficient and the maximum respiration activity were calculated. The values of the dissolved oxygen di †usion coefficient varied with biolÐlm development and values reported here (2 ] 10~10È1.2 ] 10~9 m2 s~1) are in good agreement with literature data. Calculated oxygen consumption rates Ðt well with values obtained in respirometry tests with washed out bioÐlms. The knowledge of di †usivity changes in bioÐlms is particularly important for removal capacity estimation and appropriate reactor design.