Ratmalana, Sri Lanka
Ratmalana Waste Water Treatment Plant was commissioned in February 2014, as the second high-tech activated sludge plant in Sri Lanka. With a process designed for removal of BOD, nitrogen and phosphorous, the plant receives industrial and municipal wastewater from Ratmalana Moratuwa area, 15 km south of Colombo. The implementation of Ratmalana WWTP is part of the Sri Lankan National Water Supply and Drainage Board’s ongoing programme; The Ratmalana/Moratuwa and Ja-Ela/Ekala wastewater disposal project, which was initiated in 2007. The project was financed by the Swedish International Development Agency (SIDA) and the treatment plants, dimensioned for 36 000 (Ja-Ela) and 100 000 (Ratmalana) person equivalents were designed by Purac.