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Date [ 2014-06-10, 05:07 ]

All set to lengthen the sewerage system.

Dr Vivian Balakrishnan, Minister for the Environment & Water Resources, giving a speech at the signing ceremony

(Singapore=Koreanpress) Benjamin Kim =  A June 3rd report states Singapore’s Deep Tunnel Sewerage System (DTSS) is set to expand with Phase 2 of the system. This will extends the tunnels to collect used water from the western part of Singapore. DTSS is a core water infrastructure which provides a cost-effective and sustainable solutionto support Singapore’s continued growth and meet its long-term used water needs.

A highlight of DTSS Phase 2 will be the new Tuas Water Reclamation Plant (WRP) and anintegrated NEWater factory which contributes to the long-term goal of increasing theNEWater supply to meet up to 55% of total water demand.

Tuas WRP will incorporatetechnologies that improve its energy efficiency and reduce manpower requirements.Besides a compact design, it will also be more energy efficient than the existing WRPs and itwill generate less sludge and therefore reduce the cost of sludge disposal. To this end, the Public Utilities Board (PUB), Singapore’s national water agency, is presently test-bedding various technologies inthe existing WRPs with the potential to harness more energy from used water, such as theIntegrated Validation Plant at Ulu Pandan.

The implementation of the entire DTSS will result in a 50% reduction in land taken up byused water infrastructure, freeing up the previously occupied lands for other higher valuedevelopments. Under the long-term plan for the integrated used water system, thedevelopment of DTSS will also streamline the used water network with three centralized collection and treatment points: Changi WRP in the east, Kranji WRP in the north and Tuas
WRP in the west.

“For a densely populated city state with limited land, the DTSS is a more strategic solutionthan simply renewing and expanding the existing used water infrastructure. DTSS is thebackbone of NEWater production, through which we have short-circuited the natural watercycle to produce high-grade reclaimed water on a scale unprecedented anywhere in theworld. The expansion of DTSS signifies a key milestone achieved through Singapore’s long-termvision and sound water policies to ensure its water sustainability”, said Chew MenLeong, Chief Executive, PUB.

Underscoring this strategic milestone in Singapore’s journey to ensure water andenvironmental sustainability, is the co-location of  the National Environment Agency’s (NEA)Integrated Waste Management Facility (IWMF) with Tuas WRP to reap the potentialsynergies of the water-energy-waste nexus. This co-location marks Singapore’s first initiativeto integrate used water and solid waste treatment processes to maximise both energy and
resource recovery, while minimising land footprint.

The IWMF will help meet Singapore’s long-term demand for solid waste treatment. It willprovide several key solid waste treatment processes in an integrated facility to effectivelyhandle multiple waste streams such as municipal solid waste, recyclables collected underthe National Recycling Programme (NRP), source-segregated food waste and treatedsewage sludge.

The integration of multiple treatment processes help to optimise both energy and resource recovery.With cost-effectiveness and environmental sustainability in mind, the co-location willpotentially allow the IWMF to supply electricity to Tuas WRP, while Tuas WRP will supplytreated used water to IWMF for cooling and washing purposes.

The IWMF, which will beconstructed over two phases, is potentially able to cater for up to 50% of the waste treatmentcapacity needed in Singapore when it is completed in 2024.

“The IWMF is a strategic component of NEA’s long-term waste management roadmap. It willhelp land-scarce Singapore to realise even higher levels of resource efficiency as the collocation of the IWMF with Tuas WRP will allow both NEA and PUB to harness the potentialsynergies of solid waste and used water treatment processes. These synergies will keep thecost of solid waste disposal affordable in the long term,” said NEA’s Chief Executive Officer,Ronnie Tay.

Following the open pre-qualification and tender exercises called in March 2013 and August2013 respectively, the Black & Veatch + AECOM joint-venture team has been appointed asthe Lead Consultant for DTSS Phase 2 and the IWMF, and will begin feasibility studies andpreliminary design on the projects.

abc@koreanpress.net
The contract for Professional Engineering Services was signed by CEO of PUB Chew Men Leong (front row, third from left), Executive Vice President of Black & Veatch Dr Cheong Hoe Wai (front row, fourth from left), and the Regional Executive, South and Southeast Asia, of AECOM Peter Lee (front row, first from right)


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