OPTIMIZATION OF THE COLOR CORRESPONDING TO THE DIFFERENT ABSORBENCIES OF TANNERY WASTEWATER BY RESPONSE SURFACE DESIGNS

Abstract

The control of pollutant discharges, during the treatment of wastewater from tanneries, is the main task to restore the ecological environment and minimize the time and cost. In this work, we performed experiments concerning the treatment of industrial discharges from a tannery located in the city of Mohammedia-Morocco. An optimization study will be presented to model and optimize the corresponding absorbances at the following wavelengths: 436 nm, 525nm and 620 nm, using the most influential factors such as coagulant, pH and flocculant. In order to minimize the number of experiments performed, the Box-Behnken response surface design was applied. Quadratic models characterizing the three absorbances studied during the treatment will be obtained. The statistical, graphical and algebraic characteristics will be presented. A perfect agreement between the theoretical and experimental results has been established, with a very good performance in the depollution of treated wastewater.