Denitrification with Carbon Addition—Kinetic Considerations

Authors:
  • ITI. Takács
    I. Takács
  • YMY. Mokhayeri
    Y. Mokhayeri
  • ANA. Nichols
    A. Nichols
  • JHJ. Hinojosa
    J. Hinojosa
  • RRR. Riffat
    R. Riffat
  • CBC. Bott
    C. Bott
  • WBW. Bailey
    W. Bailey
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Abstract
The Blue Plains Advanced Wastewater Treatment Plant (Washington, D.C.) uses methanol as an external carbon source in a postdenitrification process, to achieve low effluent total nitrogen concentrations. This becomes more difficult in winter, at lower mixed liquor temperatures and higher flows, as a consequence of the kinetic behavior of the methanol‐utilizing heterotrophs. The paper reports on an experimental batch test study conducted on Blue Plains postdenitrification sludge to investigate (1) the maximum specific growth rate of methanol‐utilizing heterotrophs (μ METH); (2) the temperature dependency of the growth rate; and (3) the efficacy of alternate substrates (ethanol, acetate, and sugar). A limited number of tests were conducted on sludge from two other treatment plants with methanol addition.

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