Comparison of inorganic coagulants and floculant using Jar-Test for the physical and chemical treatment of dairy effluent
DOI:
https://doi.org/10.6008/CBPC2179-6858.2022.003.0009%20Keywords:
Jug test, Aluminum sulfate, Aluminium polychloride, Anionic flocculantAbstract
Industrial effluents, if not treated, generate impacts on soil and surface and groundwater. In this sense, the objective was to verify the optimal dosage and pH of the chemical coagulants aluminum sulfate and Aluminum Polychloride (PAC), the best coagulant, the best concentration of flocculant for turbidity values of small dairy effluent by means of jar tests. Two coagulation experiments were carried out with different dosages of two chemical products (PAC - Aluminum Polychloride and Aluminum Sulfate) at different settling times, to obtain the best coagulant, optimal concentration and action time, carried out in the Jar-Test equipment. . After determining the best coagulant, concentration and action time, a new experiment was carried out, fixing the best concentration of the coagulant plus the Anionic Polymer Flocculant IFloc 101 at different concentrations, aiming to obtain the best concentration of the flocculant and action time for removal. of Turbidity. The Jart-Test assays were carried out in a completely randomized design (DIC) in a factorial arrangement (concentration x action time) with split plots. Analysis of Variance (ANAVA) was performed and the averages of Turbidity removal efficiencies were compared using the Scott-Knott test at 5% probability. The PAC coagulant followed by IFloc 101 Anionic Polymer Flocculant proved to be more satisfactory for pollutant removal in the Jar-Test, at the dosages of 0.8 mL.L-1 of PAC and 1 mL.L-1 of Anionic Polymer Flocculant IFloc 101, although, statistically, the lowest concentrations of PAC and flocculant would serve the treatment of the effluent.
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