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| Krichen, Emna; Rapaport, A.; Fouilland, Eric. |
| We address the problem of determining functional framing from experimental data points in view of robust time-varying predictions, which is of crucial importance in bioprocess monitoring. We propose a method that provides guaranteed functional bounds, instead of sets of parameters values for growth functions such as the classical Monod or Haldane functions commonly used in bioprocess modeling. We illustrate the applicability of the method with bioreactor simulations in batch and continuous mode, as well as on real data. We also present two extensions of the method adding flexibility in its application, and discuss its efficiency in providing guaranteed state estimations. |
| Tipo: Text |
Palavras-chave: Functional estimation; Interval observers; Growth functions; Least square. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00609/72149/73205.pdf |
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| Krichen, Emna; Rapaport, Alain; Le Floc'H, Emilie; Fouilland, Eric. |
| Positive interactions such as facilitation play an important role during the biological colonization and species succession in harsh or changing environments. However, the direct evidence of such ecological interaction in microbial communities remains rare. Using common freshwater microalgae isolated from a High Rate Algal Pond HRAP treating wastewaters, we investigated with both experimental and modeling approaches the direct facilitation between two algal strains during the colonization phase. Our results demonstrate that the first colonization by microalgae under a severe chemical condition arose from the rapid growth of pioneer species such as Chlorella sorokiniana, which facilitated the subsequent colonization of low growth specialists such as... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00592/70434/68528.pdf |
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