Product category:
Control Valves (Rotary, Mixing, Temperature Control etc)
News Release from: Wedeco UV Systems
Edited by the Engineeringtalk Editorial
Team on 09 January 2004
Singapore opts for UV disinfection
Wedeco has been commissioned by Hydrochem, one of the largest water utilities and distributors in Singapore, to supply three UV systems of the new BX series.
Wedeco was commissioned by Hydrochem, one of the largest water utilities and distributors in Singapore, to supply three UV systems of the new BX series The BX systems are used to disinfect the high quality water produced in the Seletar water works (also known as Newater)
This article was originally published on Engineeringtalk on 22 Aug 2003 at 8.00am (UK)
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The state-of-the-art UV reactors are currently being installed.
Newater is wastewater which has been purified and processed under particularly stringent regulations.
After the primary and secondary treatment in a waste water treatment plant, the wastewater undergoes further treatment with microfiltration and reverse osmosis.
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Finally, UV light is deployed as an additional safeguard against biological regrowth.
Newater is used in industrial applications such as for the production of semiconductors and for cooling towers in air conditioning systems in office buildings.
Part of this water, which is primarily intended for industrial use, is feed into the local drinking water reservoir to support the provision of drinking water.
Conventional waterworks then produce high-quality drinking water from this reservoir.
In the future, the Newater project will make a decisive contribution to reducing Singapore's dependence on external water deliveries, for example, from Malaysia.
In Singapore, the recovery of wastewater for industrial use is an important and economical alternative to the use of drinking water.
However, in doing do, extremely stringent quality standards must be met.
In recent years, PUB (Public Utilities Board), the national water authority in Singapore, has invested several million dollars in the construction of Newater waterworks in order to supplement the provision of water.
Currently water requirements in Singapore are roughly 1.3 million cubic meters per day.
Now, 72,000 cubic meters per day are being supplied by Newater waterworks.
From 2004 an additional 24,000 cubic meters of Newater per day will come from Seletar.
UV light is well known as a proven environmentally friendly technology for disinfecting wastewater.
Irradiation with UV light results in irreparable damage to genetic information (DNA).
The reproduction of the micro-organisms by cell division is directly prevented, the organisms lose their pathogenic character and die.
This process occurs within seconds and, in contrast to chemical disinfection, produces no dangerous byproducts.
The Wedeco BX 1200 systems supplied are designed for an UV dosage of 90mJ/cm2 and for throughput volumes of 1000m3/h.
In conjunction with Wedeco's low pressure Spektrotherm HP lamps, the intelligent electronic system control allows particularly energy-efficient operation, using up to 60% less energy than comparable medium-pressure lamp systems.
Furthermore, the modern automatic wiper system of the BX series ensures the reliable continuous operation of the system.
These factors resulted in those responsible in Singapore deciding to use Wedeco's efficient low-pressure UV technology.
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