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Fraction of M axim um G rowth Rate

0.6

Boon & Laudelout, 1962

0.4

ASMN

NOB Inhibition by FNA

0.2

0.8

0

  • 0

    500 1000

Total Nitrite-N, mg/L

1.2

1

Denitrification Modeling

  • Four distinct processes, individually regulated by--

  • μ max = f(T, salt, inhibition)

  • ng fraction of competent biomass

  • Electron donor (Substrate)

  • Electron acceptor (NOx)

  • Inhibition by oxygen

  • Reduced anoxic yield

  • Mass transfer to describe NO and N2O releases

Arrhenius vs. Ratkowsky Eqns.

250

Relative Rate

200

150

100

NO2 Production Knowles Jones Arrhenius Eqn. Ratkowsky Eqn.

50

0

0

10

20 Temperature, °C

30

kT = k20 ⋅Θ(T 20)

( ) ( { m i n ˆ * 1 b T T e μ =

(c*(T Tmax

1500

40

)) )}2

11

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