Análisis de la eficiencia de remoción de turbiedad de agua cruda con el uso únicamente de polímeros

Abstract

It is proposed to analyze the turbidity removal efficiency of raw water with polymers as coagulant-flocculants, and not only as coadjuvants in the traditional water purification system, through jar test trials. Bentonite synthetic water samples were prepared with three levels of turbidity: 70 NTU, 20 NTU and 10 NTU, the tests were carried out in stages: Stage I: Applying aluminum sulphate, Stage II: Tests with the optimal doses determined in the Stage I, plus dose of cationic, anionic and non-ionic polymer, and Stage III: Applying only polymers of cationic, anionic and non-ionic type. The traditional system was compared with the use of polymers, taking into account its efficiency in removal of turbidity and color, and the cost that would represent making 1 m3 of water drinkable. One physical-chemical parameters evaluated was the determination of the residual aluminum concentration. The residual aluminum concentration in the clarified water from the stages I and II trials contains aluminum traces of 0.098 mg Al/L for the 10 NTU tests, which exceed the LMP established by the United States, corresponding to 0.05 mg Al/L.