For high NTU waste water ...

For high NTU waste water Roughing Filter (RF) is effective as a pre-treatment system for Slow Sand Filter (SSF) with coagulant dosing and mixing with raw water. This RF system can pre-treat high turbidity raw water (1000 NTU) to generate low turbidity (10 NTU) pre-treated water for SSF treatment. In the filter media, height of the filter media, filtration rate and coagulant dosing varied and the characteristics of each item evaluated and the design guidelines can be formulated. Water Treatment Plants (WTPs) consisting of pre-treatment with RF followed by SSF to treat river water can be  designed. As per attached diagram.