Application of a Polymer in Drinking Water Treatment: A Case Study

The effect of an anionic polymer in removal efficiency for turbidity and total organic carbon measured as UV254 from raw water at Dhaka was analysed. Adding0.05 mg/L of the polymer with 85 mg/L of alum the increase in the % removal of turbidity is only 1.23% than the alum alone. By doubling the polymer dose with the same alum dose, the removal efficiency increases only by 0.47%. Addition of alum alone is found far more effective than adding only polymer for the removal of turbidity. Similarly, in the first arrangement in case of removal of UV254, the removal efficiency is decreased by 3.06% rather than increased. Even doubling the polymer dose along with the same alum dose, removal of UV254 is below what is achieved by alum alone. Therefore, extensive study is needed to decide on polymer as a workable, and dependable potable water treatment process aid at Dhaka.