Areal Loading lb BOD51000 ft2 day

Figure 19.6 Effect of total organic loading on the nitrification efficiency in a trickling filter accomplishing combined carbon oxidation and nitrification. (From G. T. Daigger, L. E Norton, R. S. Watson, D. Crawford, and R. U. Sieger, Process and kinetic analysis of nitrification in coupled trickling filter/activated sludge processes. Water Environment Research 65 750758, I993. Copyright ® Water Environment Federation; reprinted with permission.)

Total Organic Loading, lb BOD5/( 1000 ft3 ■ day)

Figure 19.6 Effect of total organic loading on the nitrification efficiency in a trickling filter accomplishing combined carbon oxidation and nitrification. (From G. T. Daigger, L. E Norton, R. S. Watson, D. Crawford, and R. U. Sieger, Process and kinetic analysis of nitrification in coupled trickling filter/activated sludge processes. Water Environment Research 65 750758, I993. Copyright ® Water Environment Federation; reprinted with permission.)

in oxygen units, it should be possible to correlate the rate at which oxygen demand is being satisfied with the trickling filter process loading. This has been done, and the rate per unit of media volume is called the oxidation rate, A(m." It is calculated using the following equation:

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