Biyagama Water Treatment Plant

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]

Biyagama Water Treatment Plant
Biyagama Water Treatment Plant is located in Sri Lanka
Biyagama Water Treatment Plant
Location of Biyagama Water Treatment Plant
Desalination plant
Coordinates06°56′44″N 79°57′27″E
Daily capacity160,000,000 L/d (35,000,000 imp gal/d)
Operation dateJuly 22, 2013 (2013-07-22)

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]

Design capacity of treatment units [2]
Unit Quantity Nominal capacity Maximum capacity
Intake structure 2381,800 m3/d (13,480,000 cu ft/d)
Raw water regulation tank 1187,300 m3/d (6,610,000 cu ft/d)
Mixing chamber 1187,300 m3/d (6,610,000 cu ft/d)
Flocculator/clarifier 631,200 m3/d (1,100,000 cu ft/d)37,500 m3/d (1,320,000 cu ft/d)
Filter 823,400 m3/d (830,000 cu ft/d)26,800 m3/d (950,000 cu ft/d)
Clean water/contact tank 1181,800 m3/d (6,420,000 cu ft/d)187,300 m3/d (6,610,000 cu ft/d)

Extension

The Kelani Right Bank Water Supply Project - Phase 2 is a Rs. 8.5 billion project to significantly increase the production to 360,000 m3/d (13,000,000 cu ft/d). The expansion project is ongoing as of June 2019, by Maga Engineering and Suez.[3][4]

References
  1. Pubudu Keethi, Sudath; Hanafi, M. T. M. (22 July 2013). "President to open Biyagama Police Station, Water Treatment Plant today". Daily Mirror. Retrieved 6 June 2019.
  2. Sumanaweera, S (27 August 2015). "Kelani Right Bank Water Treatment Plant" (PDF). Japan Water Research Center. Retrieved 6 June 2019.
  3. "SUEZ wins €108m WTW contract in Sri Lanka". Waterbriefing.org. 7 June 2016. Retrieved 6 June 2019.
  4. "Maga completes Rs 6 bn Water Works in 2018". Daily News. 30 May 2019. Retrieved 6 June 2019.


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