Thailand, Bangkok Wastewater Project, Stage IV
The scheme included a WWTP with sludge treatment facilities to treat a dry weather flow of 150,000 m³/d and serve an existing population of ca. 550,000, plus industrial wastewater and infiltration summing up to a PE of 1 million at an average flow of 150 l/h/d.
The project also included 28 km of sewers with up to 2,500 mm diameter, together with pumping stations and associated rising mains totaling a further 10 km. The project area, which covers approx. 33 km², is a highly developed district between the airport and the central area of Bangkok.
The WWTP which includes inlet pumping station, preliminary treatment (screening and grit removal), secondary treatment using sequencing batch reactors, sludge thickening, digestion and dewatering has been constructed on 4 levels on a compact site. Wastewater is treated to a high standard with nitrogen and phosphorus removal. Allowance has been made for increased flows in the future with the sequencing batch reactors designed to accommodate higher flows by changing the cycle time and providing additional mechanical plant. The plant is fully automated and includes SCADA.
The contract is a FIDIC-based turn-key contract with the contractor being responsible for the detailed design, construction, and operation and maintenance of the works during the 1st year of operation.
Client | Bangkok Metropolitan Administration, Thailand |
Location | Bangkok, Thailand |
Services Period | 2001 – 2006 |
Project Cost | 90 million EUR |
Technical Data | |
| 150,000 m³/d |
| 550,000 PE |
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