Singapore Deep Tunnel Sewerage System

Singapore - Singapore continually seeks to improve water resiliency and the Singapore's Deep Tunnel Sewerage System (DTSS) is a cost-effective solution that allows for efficient, large-scale water recycling. Arcadis is part of DTSS Phase 2 Contract T-07, which extends the existing deep tunnel system to collect used water from the western and southern parts of Singapore to the new Tuas Waste Reclamation Plant (TWRP) for purification.

800,000

CUBIC METRES OF NEWATER PER DAY

30% - 55%

INCREASE IN WATER RECYCLING RATE

As the appointed firm by Ed. Zublin AG, Arcadis will provide detailed design expertise for both temporary and permanent works for Contract T-07. This includes the detailed design for 14 shafts, a 6.9km long South Tunnel and a 5.1km Northwest Link Sewer Tunnel which will be constructed using Tunnel Boring Machines.

By 2025, the used water will be transported by gravity and 800,000 cubic metres of water will be treated each day into NEWater and Industrial-grade water for use. This will increase the overall water recycling rate in Singapore from 30% to up to 55% of total water demand.

In addition, DTSS will enable the integration of used water and solid waste treatment processes. This is through the synergies of water-energy-waste nexus where food waste and sludge from TWRP and IWMF will be treated to produce high-quality biogas. This will in turn be used for a variety of purpose including powering TWRP and its water purification processes.

DTSS will also free up previously occupied lands for other higher value developments with a 50% reduction in land taken up for used water infrastructure

Arcadis is proud to be part of the team to provide highly sustainable and cost-effective long term solutions for water management in Singapore.

Sources: Public Utilities Board (Singapore)

Outcomes

800,000

CUBIC METRES OF NEWATER PER DAY

30% - 55%

INCREASE IN WATER RECYCLING RATE

Questions about this project

Ilias Michalis

Technical Director +65 6239 8382 Ask me a question