Simplified modeling of simultaneous reaction kinetics of carbon oxidation and nitrification in biofilm processes

Satoshi Tsuneda, J. Auresenia, K. Hibiya, A. Hirata

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Batch experiments with varying initial substrate concentrations and biomass volumes were performed in a three-phase fluidized bed biofilm reactor treating simulated domestic wastewater to study the simultaneous carbon oxidation and nitrification in the biofilm process. A simplified mass balance equation for the biofilm was proposed and five different kinetic rate equations were used to match the actual data. The kinetic parameters were obtained by nonlinear regression analysis on a set of two differential equations representing the simultaneous carbon oxidation and nitrification. The competitive inhibition model incorporating the effects of total organic carbon (TOC) concentrations on nitrification rates was the best-suited model based on the average r2. In this model, oxygen concentration and its affinity constants were not included. Instead, it was assumed that the rate of carbon oxidation is independent of the NH4 +-N, while nitrification is affected by TOC. The number of parameters was successfully minimized without reducing its ability to accurately predict the bulk concentration time course, which would reduce computational complexity and possibly enhance the availability for an actual wastewater treatment process.

    Original languageEnglish
    Pages (from-to)239-246
    Number of pages8
    JournalEngineering in Life Sciences
    Volume4
    Issue number3
    DOIs
    Publication statusPublished - 2004 Jun

    Fingerprint

    Nitrification
    Biofilms
    Reaction kinetics
    Carbon
    Oxidation
    Organic carbon
    Waste Water
    Kinetic parameters
    Regression analysis
    Wastewater treatment
    Fluidized beds
    Computational complexity
    Biomass
    Wastewater
    Differential equations
    Availability
    Oxygen
    Kinetics
    Regression Analysis
    Substrates

    ASJC Scopus subject areas

    • Fluid Flow and Transfer Processes

    Cite this

    Simplified modeling of simultaneous reaction kinetics of carbon oxidation and nitrification in biofilm processes. / Tsuneda, Satoshi; Auresenia, J.; Hibiya, K.; Hirata, A.

    In: Engineering in Life Sciences, Vol. 4, No. 3, 06.2004, p. 239-246.

    Research output: Contribution to journalArticle

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