The results of the analysis of the samples taken at the entrance and the exit of the treatment plant reveal a marked improvement of the quality of the water after its treatment. We calculated the TREATMENT YIELD according to the following relation: Yield (%) = (XE - XS) / XE * 100. (XE: the effluent content at the inlet of the basin; XS: the content of the effluent at the outlet of the basin).
There is a clear decrease in the COD which goes from a value of 1200 mg / l at the entrance of the station to 40 mg / l at the exit which represents a reduction of 96.66%; BOD5, which goes from an average value of 120.0 mg / l at the entrance of the station to 5 mg / l at the exit which represents a 95.83% reduction; Total Nitrogen (NTK) increased from a value of 16.8 mg / l at the station inlet to 1.4 mg / l at discharge which represents a reduction of 91.66% and total coliforms increased from a value of 28,500 mg / l at the entrance to the station at 2,600 mg / l at the exit which represents a reduction of 67.21%.
To see if our treatment system meets wastewater discharge standards, we compared the values of the different parameters studied to the threshold values of the WHO discharge standards. From this comparison, it appears that the values of the treated water parameters obtained are within the range required by the WHO standard. This confirms the effectiveness of the treatment.
Mon, 13/08/2018 - 17:12