Piloting MF into NF for Hardness Removal

This paper describes the pilot program for treating a surface water for hardness reduction and the findings. Direct membrane filtration was selected for the filtration unit process. Nanofiltration with bypass blending was selected for the hardness removal unit process. The proposed new plant will have a maximum permeate production capacity of 420 gpm. The new plant will send permeate to the existing packed tower aeration, GAC contactors and reservoir to complete the water treatment process