The Influence of Temperature on the Nitrification Rate

Nitrification And Temperature

The optimum temperature for the growth of nitrifying bacteria, according to the literature, is between 28 C and 36 C, although an optimum temperature of up to 42 C has been reported for Nitrobacter by Painter (1970). Growth constants of nitrifying bacteria are greatly affected by temperature (Table 3.9). Figure 3.2 shows that the nitrification rate is a function of temperatures between 5 and 35 C. The maximum growth rate occurs at approximately 30 C. Curve A, which was produced by Borchardt...

The Influence of pH on the Nitrification Rate

Nitrification Free Ammonia Inhibition

In the literature, the optimum pH value forthe nitrification process varies between 8 and 9. Figure 3.7 summarizes investigations of pH effects on the nitrification rate. Usually the nitrification rate decreases, as the pH decreases. By measuring the nitrification rates Meyerhof (1916) found the pH optimum for Nitrosomonas to be between 8,5 and 8,8, and for Nitrobacter to be 8,3 to 9,3. Hofman et al. (1973) made similar investigations, and found for both organisms an optimum pH of 8.3, and that...