Singapore’s National Water Agency PUB has awarded Sembcorp Design and Construction (SDC) the contract to build the biosolids treatment facility for the Tuas Water Reclamation Plant (WRP). Accordingly, SDC will construct Tuas WRP’s energy-efficient biosolids building, digesters, and greasy waste receiving facility. The new facilities will be integral to joining the operations of Tuas WRP to the National Environment Agency (NEA) ‘s Integrated Waste Management Facility (IWMF) next to it. The project is scheduled to start in April and to be completed in 2025.
SDC, a wholly-owned subsidiary of local construction and property group Chip Eng Seng Corporation, was chosen out of 11 bidders for this project. The project is valued at SGD 433 million and constitutes a significant component of the Deep Tunnel Sewerage System (DTSS) Phase 2 project.
PUB’s DTSS Phase 2 project consists of a 100 km network of deep tunnels and link sewers. Scheduled for completion in 2025, it will channel used water via gravity from the western half of Singapore to Tuas WRP for treatment. The Tuas WRP will be the largest facility of its kind in the world, with a capacity of 800,000 cubic meters per day.
The Tuas WRP is a key component of Singapore’s Deep Tunnel Sewerage System (DTSS) Phase 2. DTSS uses deep tunnel sewers to convey used water by gravity to centralized WRPs located at the coastal areas. The treated used water is further purified into ultra-clean, high-grade reclaimed water called NEWater or discharged to the sea through outfalls. The Tuas WRP will be co-located with National Environment Agency’s (NEA) Integrated Waste Management Facility (IWMF) to harness the potential synergies of integrating used water and solid waste treatment while optimizing land use. Sludge from the WRP will be sent next door to the IWMF to be incinerated.
In 2019, PUB and NEA announced that they would call tenders worth an estimated SGD 5 billion (USD 3.5 billion) over the next five years for civil, mechanical and electrical engineering works for the Tuas Nexus, which includes the Tuas WRP and IWMF.
(Sources: PUB; The Straits Times)