This phase consisted in taking samples of the raw effluents and effluents treated by the treatment plant. The samples are sent to the laboratories of the School of Biological and Food Techniques (ESTEBA) at the University of Lomé for analysis.
The representative homogeneous sample is obtained without its characteristics being altered. The sampling points chosen in this study are: the entrance of the treatment plant and the exit of the treatment plant.
The pollution parameters to be measured are:
- Hydrogen potential (pH):
- MES (suspended solids)
- COD (chemical oxygen demand)
- BOD (biochemical oxygen demand)
- hydrocarbon
- Total Phosphorus
- Total coliforms
- Thermo tolerant coliforms