Predicting Accumulation of Intermediate Compounds in Nitrification and Autotrophic Denitrification Processes: A Chemical Approach

Figure 3

Regression lines between the specific production of nitrous oxide (a) and elemental sulphur (b) and nitrite (c) for each operational stage and the oxidative capacity of the bulk liquid. Dashed grey lines represent the 95% confidence interval, and solid grey lines represent the 95% prediction interval (in the case of elemental sulphur, negative production values indicate an overall consumption of the accumulated in the system).

(a)

(b)

(c)