This study investigated the effect of coagulation/flocculation treatment
process on upgrading wastewater treatment plant. A comparison
between two different coagulants (alum – ferric chloride) with different
dosage and pH values were applied to the coagulation processes. The
experiments were performed in a conventional jar-test apparatus in El
Berka wastewater treatment plant in El Sallam district, Cairo, Egypt.
The results reveal that pH values (7–8), enhance removal efficiency of
the COD, TSS and total phosphorous (TP). Percentage removal of
25.7%, 52.6% and 16.7% of COD, TSS and TP, of the blank sample
while the removal efficiency increased to be 55.2%, 84.4% and 64% of
COD, TSS and TP, respectively, by the addition of 80 mg/L alum and
66.1%, 91.6% and 89.5% removal of COD, TSS and TP, respectively,
were achieved with the addition of 100 mg/L ferric chloride to the
wastewater samples. The optimum pH value for alum was 7 and 8 for
ferric chloride. |
