Dear Engr. Chinenye, To my ...
Published by Imad Umer, Regional Manager at Envirogen Group
Dear Engr. Chinenye,
To my knowledge Alum is the cheapest Cooagulant readily available in the market. Other coagulant which would be more efficient in your above mentioned applications could be Ferric Chloride but it would be definitely costlier than Alum.
Regards, Imad