Tratamento de efluente real de indústria de tintas pelo uso de métodos conjugados de coagulação química e eletroquímico

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Universidade Federal de Goiás


In the last years problems regarding the availability and quality of water are gaining a lot of attention once the latest water crisis that occurred in Brazil were not restricted to arid and semiarid regions, but in regions with higher population density and industrial activity. Some types of industry activities have called more attention because its consume large volumes of water and contaminate lakes, rivers and groundwater. In this sense, the search for new wastewater treatments has become very promising, since this process can allows the reuse of the water and then reducing the consumption. The present work describes and discusses an investigation into the treatment of paint manufacturing wastewater (water-based acrylic texture) by coagulation (aluminum sulfate) coupled to electrochemical methods (BDD electrode). Two proposals are put forward, based on the results. The first proposal considers the feasibility of reusing wastewater treated by the methods separately and in combination, while the second examines the possibility of its disposal into water bodies. To this end, parameters such as toxicity, turbidity, color, organic load, dissolved aluminum, alkalinity, hardness and odor are evaluated. In addition, the proposal for water reuse is strengthened by the quality of the water-based paints produced using the wastewater treated by the two methods (combined and separate), which was evaluated based on the typical parameters for the quality control of these products. Under optimized conditions, the use of the chemical coagulation (12 mL/L of Al2(SO4)3 dosage) treatment, alone, proved the feasibility of reusing the treated wastewater in the paint manufacturing process. However, the use of the electrochemical method (i = 10 mA/cm2 and t = 90 min) was required to render the treated wastewater suitable for discharge into water bodies.



Reuso de água, Oxidação anódica, Coagulação química, Water reuse, Anodizing, Coagulation chemical


SILVA, L. F. da. Tratamento de efluente real de indústria de tintas pelo uso de métodos conjugados de coagulação química e eletroquímico. 2016. 65 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás,Catalão, 2016.