The Deep Tunnel Sewerage System (DTSS) is an efficient and cost-efficient solution to meet Singapore's long-term needs for used water collection, treatment, reclamation and disposal. Conceptualised and managed by PUB, Singapore's National Water Agency, it was conceived as a cost-effective and sustainable solution to meet Singapore's long-term used water needs.
- Deep Tunnel Sewers
- Changi Water Reclamation Plant
- Link Sewer Network
- Deep Sea Outfall
The mammoth DTSS (Phase 1 & 2) project consists of two large, deep tunnels crisscrossing the island, two centralised water reclamation plants, deep sea outfall pipes and a link sewer network.
Phase 1: Completed in 2008
Completed in 2008, Phase 1 of the DTSS comprises a 48km long deep tunnel sewer running from Kranji to Changi, a centralised water reclamation plant at Changi, two 5 km long deep sea outfall pipes and 60km of link sewer.
NEWater storage tanks
The heart of the DTSS, the Changi Water Reclamation Plant (Changi WRP) is a state-of-the-art used water plant capable of treating 800,000 cubic metres (176 million gallons) or 320 Olympic size swimming pools of used water a day to international standards. The treated used water is then discharged into the sea through deep sea outfall pipes or channelled to the Changi NEWater factory on the rooftop of the reclamation plant where it is further purified through advanced membrane technologies into NEWater, Singapore's own brand of reclaimed water.
Crowned 'Water Project of the Year' at the Global Water Awards 2009 in Zurich, Switzerland on 28 April 2009, the DTSS was selected as the water project with the most significant contribution to water technology and environmental protection. The annual Global Water Awards is widely recognised as one of the most prestigious symbols of achievement in the global water industry.
Yokogawa Engineering Asia was selected as the instrument supplier for this megaproject, as part of which it successfully installed more than 1,000 pressure transmitters, level transmitters, magnetic flowmeters, and pH analyzers.
Changi WRP overview
The Challenges and the Solutions
One of the key challenges was field device management through PROFIBUS. PROFIBUS incorporates the field device tool/device type manager (FDT/DTM) technology, which enables the monitoring of measured data and the configuration of devices from the operator stations in a central control room. With these requirements in mind, the devices installed in the DTSS were all designed to the PROFIBUS specifications.
The other challenge was the large 2.4 meter diameter of the sewage pipes from the influent pump station at the Changi WRP. Prior to the installation of two 2.4 meter Yokogawa magnetic flow meters, flow tests were executed at a Yokogawa test facility in China that was sufficiently large to handle tests on this scale. In the presence of the customer's project managers, the flow meters were tested for a three minute period of time to verify that they measured flow with the required level of accuracy and repeatability. Following the successful completion of these tests, the flow meters were shipped to Singapore.
Deep tunnel sewage system (DTSS)
Yokogawa flowmeter for 2.4 meter diameter pipe
A row of Yokogawa magnetic flowmeters
By means of PROFIBUS, data and device monitoring and control can be carried out from the central control room, eliminating the need for site patrols. This reduces maintenance costs and maximizes efficiency by enabling quick and timely operator responses.
The high reliability and accuracy of our field devices reduces the likelihood of failures and contributes to the minimization of maintenance costs over the entire plant lifecycle.
AXF series magnetic flow meters, EJA series pressure/differential pressure transmitters, and pH analyzers
Yokogawa는 수처리 설비의 더욱 안정적인 운영을 위한 최적의 솔루션을 제공합니다. 이러한 솔루션에는 정교한 기술, 탁월한 제품 품질 및 라이프 사이클 전반에 걸친 광범위한 애플리케이션 노하우가 포함됩니다.
정수 및 하수 처리
Yokogawa는 보다 효율적인 사회를 만들기 위하여 에너지 최적화 기술 개발, 온실가스 감축, 오염 물질로부터 환경을 보호하는 견고한 제품 제작 등을 통해 지속 가능한 수자원 생산을 위한 제어 솔루션을 제공하고 있습니다. Yokogawa의 첨단 기술과 폭넓은 애플리케이션 노하우를 통해 고객과 협력하여 사업을 활성화하고 플랜트 수명주기 전반에 걸쳐 높은 가치를 제공할 수 있는 지속 가능한 솔루션을 제공합니다. 당사의 기술과 제품은 플랜트의 성능을 향상시키고 오늘날의 수자원 시장에서 경쟁적으로 운영할 수 있도록 보장하며 운영비를 절감합니다. Yokogawa는 지자체 및 공업용수 처리 시장에서 광범위한 수처리 응용 분야를 지원합니다.
폐수 처리 설비는 많은 모터, 펌프, 송풍기 등을 사용하기 때문에 운전 비용을 줄이기 위해서는 전력 소비를 줄이는 것이 중요합니다. Yokogawa는 에너지 효율성을 높이기 위한 최적의 제어 솔루션을 제공합니다.
Related Products & Solutions
pH and ORP Sensors
pH 전극 및 센서는 pH 측정의 감지 부분입니다. Retractable, flow-though, 침적 및 직접 삽입을 포함한 다양한 설치 옵션이 있습니다.
적절한 pH 전극 / 센서 선택은 최적의 측정 결과를 위해 중요합니다.