Articles & Case Studies

Heathrow T2 to have one of UKs most efficient water treatment systems

Posted: Wednesday 18th July 2012

Innovative technology from water treatment equipment specialists, Waterwise Technology Ltd, is helping BAA achieve some of the highest efficiencies in water treatment in the UK at Heathrow’s new multi-million pound terminal.

Using a combination of ozone treatment for the cooling water and a water recycling system, Heathrow will benefit from significant reduction in energy and carbon emissions.

The Waterwise Filtex Ozone water treatment systems, already used by BAA on other installations at Heathrow, will reduce water consumption on the cooling towers by 15% compared to traditional chemical treatment methods, whilst also eliminating the environmental impact of transportation, packaging and waste containers associated with chemical treatment.

Effluent water from the cooling towers will also be recycled using a Waterwise Oasis recycling unit which returns a high proportion of the waste water as fresh make-up equal to or better quality than the incoming mains water supply.

It is anticipated that when the new terminal is fully operational this plant will recycle 75 tonnes per day of water. Overall waste flow to drain will be reduced by in excess of 75%. Based on the DEFRA figures for the carbon emission in purifying and delivering mains water, this system will reduce the carbon emissions by approximately 190 tonnes per year when operating on mains water supply.

The cooling water system and treatment plant is also designed to operate on a borehole water supply with minimal primary treatment.

Jon Fielder, Managing Director at Waterwise Technology comments: “Having been involved with BAA for a number of years we are pleased with their confidence in our equipment and the opportunity to work with them in meeting their sustainability and carbon reduction commitments. Our new Oasis units are proving a popular and useful option for this.

“Cooling towers serving air conditioning systems are frequently the largest water user in a commercial office building or terminal such as this. The ability to make savings in the water consumption of the cooling towers will therefore substantially reduce the overall water consumption of the building.

“Such savings contribute significantly to any new buildings environmental IPPC assessment rating as well as a company’s commitment to reduce water consumption and waste - not to mention the cost savings too.”

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