Biyagama Water Treatment Plant
From Wikipedia, the free encyclopedia
  Location of Biyagama Water Treatment Plant | |
 Interactive map of Biyagama Water Treatment Plant | |
| Desalination plant | |
|---|---|
| Coordinates | 06°56′44″N 79°57′27″E / 6.94556°N 79.95750°E |
| Daily capacity | 160,000,000 L/d (35,000,000 imp gal/d) |
| Operation date | July 22, 2013 |
The Biyagama Water Treatment Plant or BWTP is a water treatment facility located at the bank of Kelani River, in Biyagama, Sri Lanka. At a daily output capacity of 160,000,000 L/d (1,900,000 L/ks), it is the second largest water treatment facility in the country. The plant provides drinking water to approximately one million people, in Wattala, Ja-Ela, Kelaniya, Biyagama, Ragama, Kandana, Kadawatha, Kiribathgoda, Seeduwa and Ganemulla, within the Gampaha District.[1][2]
Construction of the facility began on 22 October 2008. It was ceremonially inaugurated by President Mahinda Rajapakse on 22 July 2013.[1] The facility uses raw water from the Kelani River. The maximum water loss during the purification process is 5%, due to raw water transmission, sludge de-watering and backwash.[2]
| Unit | Quantity | Nominal capacity | Maximum capacity |
|---|---|---|---|
| Intake structure | 2 | 381,800 m3/d (13,480,000 cu ft/d) | |
| Raw water regulation tank | 1 | 187,300 m3/d (6,610,000 cu ft/d) | |
| Mixing chamber | 1 | 187,300 m3/d (6,610,000 cu ft/d) | |
| Flocculator/clarifier | 6 | 31,200 m3/d (1,100,000 cu ft/d) | 37,500 m3/d (1,320,000 cu ft/d) |
| Filter | 8 | 23,400 m3/d (830,000 cu ft/d) | 26,800 m3/d (950,000 cu ft/d) |
| Clean water/contact tank | 1 | 181,800 m3/d (6,420,000 cu ft/d) | 187,300 m3/d (6,610,000 cu ft/d) |
