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Figure 7.32 Effect of the mixed liquor recirculation ratio on the total steady-state oxygen requirement and nitrate utilization rate in the MLE system described in Figure 7.29. SRT = 10 days.

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0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 Volume of the Aerobic Reactoras a Fraction of Total System Volume

Figure 7.33 Effect of the relative volumes of the two reactors on the steady-state concentrations of various constituents in each reactor of the MLE system described in Figure 7.29. The total system volume was constant at 250 m\ SRT = 10 days. The solid curves represent the anoxic (first) reactor and the dashed curves the aerobic (second) reactor.

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