Utilização de energia fotovoltaica para o tratamento de efluente têxtil por meio da técnica de eletrofloculação

Abstract

The textile sector is one of the major value on industry activities, however it’s known of one that activity heads the wastewater generation, with a large pollution potential. This study aimed to treat textile wastewater using electrocoagulation technique, which is powered by photovoltaics on its last step. The textile wastewater was collected in a textile industry in São Miguel do Iguaçu – PR. Preliminary tests were carried out aiming at the choice of the sacrifice electrode in first step, after that the experiment was made using a sequential planning, consisting of a 24-1 fractional design and a Central Composite Rotational Design (CCRD) 22, the optimized values were used in a treatment performed throughout the day in which the electrocoagulation had energy by photovoltaics. The aluminum electrodes were more effective among the variables used in fractional design, the current and the distance between the electrodes had a significant effect on the percentage of color removal, which are employed in the CCRD. Only the current terms expressed significance in the response variable, we obtained a valid model, being permissible to obtain the response surface. The optimum current value of 2.75 A was used in the test throughout the day, it was possible to obtain a removal of 88.85