Severn Trent Services Wins Contract for On-site Hypochlorite Generation System at Singapore Drinking Water Treatment Plant

The ClorTec® on-site sodium hypochlorite generation system has been selected for the Singapore Public Utility Board's new Lower Seletar Water Works facility following the evaluation of alternative treatment methods to gas disinfection.

FORT WASHINGTON, Pa. - The ClorTec® on-site sodium hypochlorite generation disinfection system from Severn Trent Services has been selected for use at the Singapore Public Utility Board's (PUB) new Lower Seletar 60-MGD (227-MLD) drinking water treatment plant. The contract for four ClorTec systems, each with a capacity of 1,500 lb/day (31.25 kg/h), was awarded in July 2011 by the project's main contractor, Sembawang Engineers and Constructors Pte Ltd (Sembawang), which is one of the leading engineering and construction companies in Southeast Asia and a subsidiary of global conglomerate Punj Lloyd Group. Construction of the plant is scheduled for completion by 2013.

The ClorTec on-site hypochlorite generation system has been a proven, cost-effective, reliable and safe alternative disinfection treatment method since 1988. The system uses three common consumables in the sodium hypochlorite generating process -- salt, water and electricity - to generate a 0.8% solution.

According to Marwan Nesicolaci, vice president of international sales for Severn Trent Services, "Interest in alternative disinfection technologies is growing in the Asia Pacific region, with recent on-site generation system installations in Malaysia, Korea, Vietnam and Australia. With the Singapore PUB's reputation as one of the region's most progressive and innovative water utility agencies, and with the promise of cost savings, improved safety and increased reliability, the use of on-site hypochlorite generation is likely to continue to grow in the Asia Pacific."

About Severn Trent Services

Severn Trent Services ( with global headquarters in Fort Washington, Pa., USA, is a leading supplier of water and wastewater solutions. The company's broad range of products and services is concentrated around disinfection, instrumentation and filtration technologies and contract operating services. Our analytical services group is the United Kingdom's leading environmental testing organization. Our operating services business provides contract management, operations support and systems improvements for utility, industrial and commercial water and wastewater customers in the United States, United Kingdom, Ireland and Italy. Severn Trent Services is a member of the Severn Trent Plc (London: SVT.L) group of companies. Severn Trent is a FTSE 100 company.

About PUB

PUB is a statutory board under the Ministry of the Environment and Water Resources. It is the national water agency managing Singapore's water supply, water catchment and used water in an integrated way.

About Sembawang Engineers and Constructors (

Sembawang Engineers & Constructors Pte Ltd is one of the leading engineering, procurement and construction groups in Singapore. Sembawang has a global presence with offices worldwide including in Malaysia, Indonesia, Hong Kong, China, India and United Arab Emirates.

Sembawang specialises in handling a diverse spectrum of technologically complex projects in the specialised areas of mega infrastructure (such as tunnels, rail, cavern systems and highways), high-rise buildings and utility works (such as power and water plants). The group has world-class competency across a full range of engineering disciplines and is an established, leading turnkey contractor capable of providing technology-based solutions and quality products and services. It is also able to undertake projects under the Build, Own and Operate (BOO) and Build, Own, Operate and Transfer (BOOT) basis.

Sembawang is a subsidiary of Punj Lloyd Limited, a leading engineering and construction group based in New Delhi and listed on the National and Bombay stock exchanges of Mumbai. The Punj Lloyd Group, with a global network spanning five continents, provides integrated design, engineering, procurement, construction and project management services for the energy, infrastructure and petrochemical sectors.


Eric Risch

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