The Effect Burnt Alum To Removing Turbidity From Water

The research focuses on the use of ordinary and burnt alum to remove the light turbidity (10 NTU) and reduces the medium ones (75NTU) by adding of different doses of ordinary alum Al2(SO4)3.16H2O and compare the results with these obtained from the burned alum at varying temperatures (200, 300, 400, 500, 600) C0. Jar test is used to find the change in the water characteristics of turbidity, pH, EC at the conditions. The study revealed that 10mg/l of burnt alum at 200Co and more give, final turbidity of about (2NTU), while it gives NTU between (7-8) in the case of using ordinal alum in removing of the light turbidity of (10NTU). In the case of reduction of the medium turbidity it find that 10mg/l of burned alum at 200Co reduces the final turbidity to about (3NTU). It appears also that the alum consumption is about 14% in case of using burnt alum as compared with the ordinary alum especially in reducing of the medium turbidity to 5NTU. key word (burnt alum, remove the light turbidity, Jar test)