The instability of the existing organic compounds in wastewater often led to changes of their characteristics from a region to another [15]. From this, the wastewater samples have been systematically compared to the composition of domestic ones which were taken as a reference. Therefore, different concentrated solutions made of mixtures of chemicals and alimentary products have been prepared [16].To ascertain the stability of the water quality, five consecutive measurements of pollution parameters have been controlled over the whole experience. The results demonstrated that the differences between the obtained values can be neglected. For optimal error estimation, the arithmetic means approach as indicated in table 4 has been adopted.