Determination of Growth Rate and Yield of Nitrifying Bacteria by Measuring Carbon Dioxide Uptake Rate

From: Water Environment Research | Date: November 1, 2007| Author: | Copyright information

ABSTRACT: Nitrifier growth parameters-the maximum growth rate (μ^sub Amax^) and yield (Y^sub A^)-were estimated by measuring the rate of carbon dioxide uptake and additional rates of oxygen uptake and ammonia (or nitrite) use. Batch tests in a combined titrimetric and offgas analyzer with enriched Nitrobacter and Nitrosomonas cultures and an activated sludge sample were performed. The measured μ^sub Amax^ values for the Nitrobacter and Nitrosomonas cultures were 0.67 ± 0.03 day^sup -1^ and 0.54 ± 0.09 day^sup -1^, while the Y^sub A^ values were 0.072 ± 0.01 g volatile suspended ...

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