In this thesis work the liquid- vapor equilibrium state of the supercritical carbon dioxide and fatty acids mixtures by means of equations of state has been modeled. Binary mixtures containing carbon dioxide with the following acids: oleic, linoleic, palmitic and lauric acids were considered. Both equations, the Predictive Soave Redlich- Kwong (PSRK) and Perturbed Chain - Statistical Associating Fluid Theory (PC - SAFT) with the van der Waals rules of mixing and two associating sites were used. The optimal parameters of the pure component of the PC- SAFT equation were calculated using both the vapor pressure and saturated liquid density data. The binary interaction parameters required in the rules of mixture of the PC- SAFT equation were determined by minimization of errors between the experimental mol fraction of the carbon dioxide and the calculated ones. For the calculation of the tot...

The present study evaluated the performance of tannery effluent treatments by coagulation processes. This was done by combining each of the organic coagulants L-1544, L-1541, and L-1700 with aluminium sulphate, respectively, as an inorganic coagulant in different mixing ratios. Subsequently, the response surface method optimized the coagulation conditions: agitation speed, time, and total coagulant concentration. The best results were obtained with the cationic coagulant based on L-1544; likewise, by superposition of contours plots, the conditions that maximize the percentages of simultaneous removal of turbidity and suspended solids were determined, the optimum coagulation values being time 4 minutes, agitation speed 169.7 rpm and total coagulant concentration 1354 ppm, obtaining 100 and 61.9 % removal of turbidity and suspended solids respectively. The R-Squared statistics show that th...