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Estimation of the Intrinsic Maximum Substrate Utilization Rate Using Batch Reactors with Denitrifying Biofilm: A Proposed Methodology

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A method for estimation of the maximum substrate utilization rate ( q max ) using batch reactors with denitrification biofilm was introduced and compared with the traditional method of using batch reactors with suspended growth for q max estimation. The values of q max obtained from the suspended-growth reactors (0.69 to 0.71 g N/g volatile suspended solids [VSS] · d) and from the attached-biomass reactors (0.74 to 0.85 g N/g VSS · d) are similar and within the range of the values reported in the literature (0.23 to 2.88 g N/g VSS · d). Therefore, the intrinsic kinetic parameter, q max , can be obtained using attached-growth batch reactors, if the effectiveness factor, η, is approximately equal to 1 and the bulk concentration of the rate-limiting substrate, C, is much higher than the half-velocity constant, K s . The attached-growth batch reactor method is unique, because the biomass used in the batch tests is the same as that present in the parent reactor under investigation.

Keywords: biofilm; biological treatment; denitrification; intrinsic parameters; kinetics

Document Type: Research Article


Publication date: August 1, 2007

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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