Water Quality
Treatment Of Water
Water treatment plants consist of units like stilling chamber, Parshall flume, Flash Mixer, Sludge blanket lamella clarifier with hopper bottom shape, Rapid gravity sand filter beds with false floor slab having PP nozzles & pneumatically operated valve arrangement, Chemical house with chemical storage & dosing facilities, backwash tank and clear water sump etc. All the controls of valves, motors & flow measurements of these semi-automatic plants are carried out from the control panel located in control room of the plant.
Treatment given to water:
- Pre-Chlorination
- Alum dosing/mixing
- Clariflocculation by sludge blanket Lamella type clarifiers
- Filtration by declining rate type rapid gravity sand filters
- Post Chlorination
Water Quality Monitoring
Water Quality is maintained as per drinking water standards given in IS:10500. Sampling of water is done at different stages to ascertain & assure right quality of water supplied to consumers. Detail of water sampling is given below:
| Stage | Type of Test | Frequency |
|---|---|---|
| Source (River) at stilling chamber | Turbidity, FRC, DO, pH | Online |
| Turbidity, FRC, pH | Hourly | |
| Physical-Chemical tests | Every shift of 8 hours | |
| Bacteriological tests | Weekly | |
| WTP Outlet | Turbidity, TDS, FRC, DO, pH | Online |
| Turbidity, FRC, pH | Hourly | |
| Physical-Chemical tests | Every shift of 8 hours | |
| Bacteriological tests | Weekly | |
|
Intermediate (At WDS) |
FRC, Turbidity – during inlet from WTP |
Once in every supply from WTP |
|
FRC, Turbidity - during supply to consumers |
Twice in every supply to consumers. | |
| Consumer end (During supply) | FRC (At site) | Daily 460-480 samples |
| Chemical test (Lab testing) | Daily average 220 samples collected from all zones |