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Effect of initial substrate concentration on the rate of nitrification in a batch experiment

✍ Scribed by Wen K. Shieh; Enrique J. La Motta

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 380 KB
Volume: 21
Category: Article
ISSN: 0006-3592
DOI: 10.1002/bit.260210207

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The intrinsic rate of nitrification was observed in a batch reactor by eliminating external and internal diffusional resistances. The former were minimized by means of intense agitation, and the latter by mechanical rupture of the activated sludge flocs using high mixer rotational speeds. The optimum temperature and pH for the intrinsic nitrification rate were found to be 30–35°C and 8.0, respectively. Initial ammonium concentration was found to have a strong effect on the value of the kinetic parameters of the Michaelis–Menten rate expression at low ammonium levels. However, at high initial concentrations both parameters attained a constant maximum value that is independent of the initial substrate level.

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