Tube Settlers:
The tube settler has hopper bottom. The water after coagulation is fed to the settler from bottom side & travels upwards. The surface area is increased by placing specific modules at inclined angle so that the contact time & surface area with water is increased.
The flocs formed after coagulation slide down the inclined modules into the hopper bottom & clear liquid overflows into the clear water sump through collection troughs. The flocks settle at the bottom & form sludge having precipitate chemical contaminant which is drained out periodically & led to the common drain chamber.
- Flash Mixer.
- Flocculator
- Secondary settler (Tube Settler)
From Raw Water underground disinfected water needs to be lifted & it is further fed to the Flash mixer, through channel. Flash mixer is a high speed mixer which mixes the coagulation chemical instantly.
Coagulant chemical shall be selected according to raw water report. Then it goes into Flocculator. Flocculator is a slow speed mixer. In the flocculation chamber flocs are formed to enhance the settling process which is accomplished in the next unit i.e. Secondary settler.
Applications:
- Raw water treatment
- Clarification of surface water
- Removal of iron, manganese etc.
- Effluent treatment plants
- Sewage treatment plants
- Waste water treatment plants