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Fraction of Maximum Growth Rate

Fraction of Maximum Growth Rate

What is new in ASMN?

  • Only 4 step denitrification model—GHG emissions

  • 2 step nitrification model with true substrates

  • pH – Known effect on nitrification rate

  • Nitrification Inhibition—multiple mechanisms

  • Temperature—Ratkowsky vs. Arrhenius

  • Mixotrophic NOB growth—

  • Fully Dynamic—

  • DOE—automated multivariable process and parameter

studies

  • Salt effects, SOC removal, microbial growth on nitrates

  • Fully compatible with ASM family of process models

AOB Activity vs. pH

1.2

1

ASMN

0.8

Siegrist & Gujer 1987

0.6

0.4

USEPA 1975

0.2

0

5

6

7 pH

8

9

0.4

Boon &

0.2

Laudelout, 1962

ASMN

10

NOB Activity vs. pH

0

1.2

1

0.8

0.6

6

9

7

8 pH

10

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