Avaliação da eficiência de diferentes agentes coagulantes na remoção de cor e turbidez em efluente de galvanoplastia

Abstract

In this work it was evaluated the efficiency of different coagulants agents in the process of coagulation/flocculation in the treatment of effluent from an electroplating industry. The following coagulants were evaluated: inorganic (ferric chloride and aluminum sulfate) and organic (chitosan and seeds of moringa, Tanfloc SG and Acquapol CI). The parameters evaluated were color and turbidity. The experiments were carried out in Jar-Test using a speed of 120 rpm and a time of 1.5 min for fast mixture and 20 rpm and 15 min for the slow mixture. The chitosan coagulant agent presented as more promising for the removal of color and turbidity in effluents from electroplating, removing 97.76% to 98.06% of color and turbidity, respectively for the concentration of 7 ppm and the sedimentation time of 20 min.