Energy and Water conservation by Coagulant Change over from Aluminum Sulfate to Poly Aluminum Chloride (PAC) at a Conventional Water Treatment Plant

Abstract

In industrial water treatment process coagulation process is used to destabilized suspended particles and to reacts with dissolved organic materials in raw water. Proper coagulation is essential for good filtration performance and for disinfection by product control. Improper coagulation can cause high aluminum residuals in the treated water and the post-treatment precipitation of particles causing turbidity, deposition and coating of pipes in the water distribution system. Minimizing the solid residuals produced from coagulation has also become a more important part of utility operations due to increased disposal costs and land filling restrictions. Choice of a suitable coagulant for maximum contaminant removal and reduction in costs is the most important parameters of water treatment. Sludge handling, conservation of water, saving energy and cost effective water treatment continue to be major hurdles in effective and efficient management of water treatment across the industries. In this case study the feasibility of using poly aluminum chloride instead of Alum has been studied.