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Figure 3: Nitrate-N readings in the sump (S) and after passing the trickling filter (TF) of the Experiments A (above) and B (below). The experiments were carried out during 3 consecutive days at 3 hours, 6:45, 11:45 and 16:45, and with a week difference. Average values are the result of 4 replicates, ± one standard deviation.
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