Physicochemical Characterization, Chlorination and ... - IJGHC

Physicochemical...Andzi et al.Figure-4: Yield on elimination of the Turbidity (%) according to the Dose of Coagulant (mg/L)Table-8: Jar Test ResultsParametersWaters of River Djoué (Sample)RawWaterWater treated by sulfate of Aluminum and LimeNumber of Becher 0 1 2 3 4 5 6Dose of Sulfate of aluminum 0 5 10 15 20 25 25(mg/L)Dose of lime (mg/L) 0 5 5 10 10 10 10pH 7,5 6,87 6,76 7,04 6,62 6,57 6,57T°C 20 20 20 20 20 20 20Turbidity 15 10 6,28 5,01 1,12 2,07 2,07Color 7,5 8 2,5 1,25 0 0 0Time of appearance of plop (mn,3’ 2’17’ 2’ 1’20’’ 2’25’' 2’25’s)’Yield of eliminat° of Turbidity(%)33,33 58,13 15 92,53 86,20 86,20We notice that the effect of the sulfate of aluminum on Djoué water’s increase with the concentrationand becomes effective in the optimal dose (20 mg/L). We obtain a yield on more than 92.53 %.Besides, the yields obtained after the optimal Coagulant dose correspond to the trouble created by theexcess of coagulant in tested waters. The results corresponding to the optimal dose of sulfate ofaluminum and Lime are recorded in table 9.Tableau-9: Optimal Conditions of FlocculationParametersDjoue Water’sOptimal dose of sulfate of aluminum (mg/L) 20Optimal dose of lime (mg/L) 10Yield of elimination of turbidity (%) 92,53pH 6,62627 IJGHC; June – August 2013, Vol.2, No.3, 618-630.