World Journal of
Pharmaceutical and Life Sciences

COMPARATIVE STUDY OF THE PHYSICOCHEMICAL CHARACTERISTICS OF THE SLUDGE FROM THE CITY OF CONAKRY

Daloba Soumah*, Aboubacar Oumar Bangoura, Ansoumane Sakouvogui and Alhassane Diami Diallo

ABSTRACT

In many cities in sub-Saharan Africa such as Conakry, large quantities of sewage sludge are generally discharged into the environment without proper treatment. This practice has considerable negative impacts on the environment and further accentuates the deterioration of the health conditions of the populations. The present research concerns the comparative study of certain physicochemical characteristics (T°, pH, MES, COD and N-NH4) of the sludge from the five (5) communes of the city of Conakry. The temperatures are: Matam (32.6°C), Matoto (30.4°C), Ratoma (30.1°C), Kaloum (28.7° C) and Dixinn (28.6°C). The average temperature of these samples is 30.08 ° C. The pH are: Matoto (6.93), Ratoma (6.80) Matam (6.3), Dixinn (6.11) and Kaloum (6.05). The average pH is 6.44. The MES values of the fluid sludge’s of the municipalities of Matam, Ratoma, Matoto, Dixinn and Kaloum are respectively 5500 mg/l, 3340 mg/l, 3252 mg/l, 2240 mg/l, 2180 mg/l and what corresponds to an average (3293 mg / l) of MES. The CODs are: Kaloum (32.15 mg/l), Dixinn (1840 mg/l), Matam (857mg/l), Matoto (969 mg/l) and Ratoma (967 mg/l). The N-NH4+ concentrations are: Kaloum (32.15 mg/l), Dixinn (33.11 mg/l), Matam (33.86 mg/l) and Matoto (67.72 mg/l), with an average of (41.71 mg/l). These results show that the sludge from the five (5) municipalities of the city of Conakry has relatively the same physicochemical characteristics and requires an adequate treatment (anaerobic digestion or planted beds) before their discharge in the raw state or their use in agriculture.

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