Fig. 3: Process optimization to reduce the residual turbidity. | npj Clean Water

Fig. 3: Process optimization to reduce the residual turbidity.

From: Fibrous super-bridging agents simultaneously improve contaminants removal and sludge dewatering via a very compact three-in-one process

Fig. 3

Impact of fibers concentration on settled turbidity (a, 3 min of settling) and pressed turbidity (b, 500 µm screen mesh). c Impact of the screen mesh size (100, 300, 500, 1000, and 2000 µm) on pressed turbidity. Settled turbidites (no screen was used, grey bars) are shown as a reference. d Impact of smaller screen mesh size (20, 50, and 100 µm) on pressed turbidity. Aggregation conditions (a–d): 1.2 mg c-PAM3/L, 4 min of mixing, pH 7 ± 0.5, temperature of 21 °C. Turbidity of synthetic water (a–d): 6.0 ± 0.5 NTU. Dashed lines are included as eye guides connecting average values obtained from duplicate experiments (a, b). Grey areas show the industry standard after treatment: <1.5 NTU after settling and <0.3 UTN after press-filtering. Error bars represent the standard deviation (c, d).

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