Remoção de algas de efluentes de ETEs

Abstract

The system of stabilization has been touted as a promising front wastewater remediation due to your high-power degradation of organic matter and pathogenic micro-organisms decay, low cost and easy operation. For this method of treatment, the mutualistic relationship between algae and bacteria is essential for your good performance. The more algae, more oxygen, which ensures greater degradation of organic matter, through the aerobic bacteria. However, when you launch the final effluent treated with high number of algae can occur the eutrophication of water bodies that can compromise the aquatic life of the spring, in addition to making the water unfit for consumption. Thus, the present work aims at the removal of algae from the treated effluent by stabilization ponds systems by chemical coagulation. To this end, we used aluminum sulfate and ferric chloride as coagulants in trials conducted with the aid of a jar test equipment. With those tests intended to assess the concentration of coagulant required, as well as the ideal pH for effective remediation of domestic effluents. The parameters evaluated by determination of chlorophyll a resulted 99,42% in an efficiency in the removal of algae using aluminum sulfate, for pH 6 and dosage of 100 mg/L. With the experiments performed using ferric chloride as coagulant, a result of 99,10% in the removal of chlorophyll a, this efficiency was obtained when the experiment was also performed at the maximum dosage, for pH 6.