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- W2550492885 abstract "In the present study, conventional and composite, laboratory prepared coagulation agents were added in a fully automatic pilot-scale Membrane Bioreactor unit, both in batch-mode addition (‘Process I’) and in continuous-flow addition (‘Process II’) experiments, aiming to improve the overall process operability, i.e. as a fouling control method. A systematic effort was made to: i) correlate the recorded trans-Membrane Pressure with two novel, easily generated fouling indices (Ratio a and Ratio b) and ii) elucidate the relationship between the coagulant equilibrium concentration in the activated sludge and the optimal amount of coagulant added/L of incoming wastewater, by applying the corresponding mass balance equation. In both processes, the ranking trend among the optimal coagulants can be classified as: FO 4350 SSH < PSiCAFPAC-18-10-15 < PAC A9-M, in increasing order of Soluble Microbial Products (SMP) removal, and as: PAC A9-M < PSiCAFPAC-18-10-15 < FO 4350 SSH, in increasing order of sludge filterability enhancement. Among the three coagulation agents, the cationic polyelectrolyte FO 4350 SSH was identified as the optimal one, since its continuous-flow addition was found to cause the largest TMP decrease (almost 40%), at the optimal dosage of 0.16 mg/L of incoming wastewater, which was 63 times lower than its equilibrium concentration in the bioreactor (10 mg/L). The respective low values of Ratio b and the short-term nature of continuous-flow experiments (6 days) indicate that the mitigation of reversible fouling was mainly responsible for this." @default.
- W2550492885 created "2016-11-30" @default.
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- W2550492885 date "2017-03-01" @default.
- W2550492885 modified "2023-09-25" @default.
- W2550492885 title "Batch and continuous dosing of conventional and composite coagulation agents for fouling control in a pilot-scale MBR" @default.
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- W2550492885 doi "https://doi.org/10.1016/j.cej.2016.11.099" @default.
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