Flocculation Treatment of Pollutants in Wastewater of “MAROUA SODECOTON” Plant

Abstract:

This paper evaluates the physical, chemical and organic parameters of untreated and treated wastewater from the Cotton Development Corporation industry in Cameroon for short SODECOTON in the city of Maroua, and this to assess the extent of pollution of these waters as well as the effectiveness of the treatment method (flocculation-coagulation) that we performed on these waters. All the parameters (physical, chemical and organic) studied were carried out using standard methods. Physical parameters such as pH, electrical conductivity (EC), total dissolved solids (TDS), suspended matter (MES) and salinity were studied. Chemical and organic parameters, including biochemical oxygen demand for five days (BOD5), chemical oxygen demand (COD), manganese, nickel, lead, zinc, phosphate, chloride, total hardness have also been studied. The results show that all these parameters are greater than the guide values. Nitrates, copper, silver, sulfates ... were absent. The samples were subjected to physico-chemical treatments. The average abatement rates obtained for each parameter studied are: TDS: 66.83%; MES: 94.55%; MO: 99.83%; BOD5: 93.19%; COD: 94.37%; iron: 93.58%; manganese: 98.11%; nickel: 91.53%; lead and zinc: 100%; for total hardness: 83% and phosphate: 96.91%. The results showed that flocculation-coagulation was effective in reducing the above parameters to acceptable values, even zero. This allows us to say that flocculation-coagulation can be a method of depollution the waste water from SODECOTON. It is therefore recommended to regularly monitor and treat the waste water from the Maroua industry (SODECOTON) in order to prevent the risk of contamination and water-borne diseases of the surrounding populations.