Treatment of Sand Filter Backwash Water from Water Treatment Plant

Abstract

In this study several tests were conducted to investigate the possibility of re-use the filter backwash water. Backwashing is done to prevent sand-granular-gravel filter media from clogging due to increased passage of particles and microorganism. Which results in wastage of water, it is a very common problem in WTP. The amount of wash water generated estimated at a rate of (10-15%) of the amount of purified water in the plant. Sand filter backwash water (SFBW) and sludge water are generated in most of drinking WTP. Good quality of water can be obtained by recycling of SFBW by adopting proper treatment. Experiments were conducted on Raw Water (RW) and SFBW samples from Surface WTP. Reuse of SFBW is of great interest.

Jar test was performed with other parameters such as turbidity, color, odor and total suspended solids were recorded for RW, SFBW and found significant differences. Results indicated that in quality of RW and SFBW can be achieved with proper treatment.