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World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

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Abstract

PHYSICOCHEMICAL CHARACTERIZATION OF DOMESTIC WASTEWATER BRUTES OF THE CITY OF CONAKRY FOR A TEST ADEQUATE TREATMENT

Daloba Soumah*, Demba Magassouba, Ansoumane Sakouvogui and Mamby Keita

ABSTRACT

The management of domestic wastewater poses many environmental problems that are becoming a concern for the health of the populations of the city of Conakry. The main objective of this study, which took place during the months of June, July and September 2021, is to determine the main physicochemical parameters of these effluents in order to recommend adequate treatment, thus reducing the nuisances suffered by the receiving environment and also remedy the loss of this water source in recoverable materials. The analyzes were carried out on twenty-five (25) samples of domestic wastewater, i.e. five (5) samples per commune of Conakry. The different parameters studied are: temperature, pH, electrical conductivity (EC), dissolved oxygen (O2), turbidity (NTU), Suspended Solids (MeS), Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD5), Total Nitrogen (Ntot), Nitrite (NO2-), Nitrate (NO3-), Ammonium (NH4+) and Phosphate (PO43-) ions. The results show that the average temperature values of the samples are between 26.80 and 30.20°C, with an average of 28.30°C. The pH values are close to neutral, they are between 6.7 and 8. The average EC values are between 750?s/cm and 1750?s/cm, with an average of 1238?s/cm. The average NTU value of the samples is 423.98 NTU. The average SS concentration is 310mg/L. The mean values of BOD5 and COD are respectively 138.19 mgO2/L and 156.59 mgO2/L. The average (Not) content of the samples is 92.52mg/L, those of Nitrates, Nitrite and Phosphate are respectively 2.16mg/L; 0.04mg/L and 0.26mg/L. The results of this research have made it possible to highlight the main physicochemical parameters of raw domestic wastewater from the city of Conakry. These results will make it possible to carry out an adequate treatment trial for these effluents for their recovery.

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