Parameter identification of thermophilic anaerobic degradation of valerate

X. Flotats, Birgitte Kiær Ahring, Irini Angelidaki

    Research output: Contribution to journalConference articleResearchpeer-review


    The considered mathematical model of the decomposition of valerate presents three unknown kinetic parameters, two unknown stoichiometric coefficients, and three unknown initial concentrations for biomass. Applying a structural identifiability study, we concluded that it is necessary to perform simultaneous batch experiments with different initial conditions for estimating these parameters. Four simultaneous batch experiments were conducted at 55degreesC, characterized by four different initial acetate concentrations. Product inhibition of valerate degradation by acetate was considered. Practical identification was done optimizing the sum of the multiple determination coefficients for all measured state variables and for all experiments simultaneously. The estimated values of kinetic parameters and stoichiometric coefficients were characterized by the parameter correlation matrix, the confidence interval, and the student's t-test at 5% significance level with positive results except for the saturation constant, for which more experiments for improving its identifiability should be conducted. In this article, we discuss kinetic parameter estimation methods
    Original languageEnglish
    JournalApplied Biochemistry and Biotechnology
    Issue number1-3
    Pages (from-to)47-62
    Publication statusPublished - 2003
    Event7th FAO/SREN-Workshop - Moscow, Russian Federation
    Duration: 19 May 200222 May 2002
    Conference number: 7


    Workshop7th FAO/SREN-Workshop
    CountryRussian Federation


    • Anaerobic
    • Mathematical modeling
    • Identifiability
    • Parameter estimation
    • Optimization
    • Valerate

    Fingerprint Dive into the research topics of 'Parameter identification of thermophilic anaerobic degradation of valerate'. Together they form a unique fingerprint.

    Cite this