Experimental studies were conducted to reduce the concentration of model systems, which contain direct dye AAD71, dispersing agent NaLS and Ethyleneglycol EGI, subjected to filtration through non-destructive methods as follows: coagulation, electroflotation, electro photocoagulation and absorption on activated carbon; and destructive methods as oxidation/photooxidation with Fenton's reagent and photo-oxidation with titanium oxide. The main proposed objective was reducing the concentration of pollutants from the model systems with dye concentration 200 mg/l,dispersant concentration 60 mg/l, and ethylene glycol dispersant 60 mg/l respectively, to admissible norms for discharge into water basins. According to the research results, it was found that the most efficient method for simple and complex model systems, is coagulation [Al 2 (SO4) 3] = 0.1M followed by adsorption on activated carbon, behind which were obtained values of COD -CR about 95% and the effect of fading can reach up to 100%.