Jersey specifies Trojan - again

Jersey Island, British Isles, is a popular tourist destination for Europeans. It’s the largest of a series of small, independent islands in the English Channel near the coast of Normandy.

In 1992, Trojan’s U.K.subsidiary, Sunwater Limited, provided a state-of-the-art water disinfection system to upgrade Jersey’s then thirty-three year old main sewage treatment plant at Bellozanne, near St Helier.

At the time, this improvement scheme, including installation of the innovative Trojan wastewater treatment system with its 1,296 mercury vapour lamps, was seen as a milestone in UV technology applications. The first commercial system of its kind to be installed in Europe, it won the prestigious section of the BA Tourism for Tomorrow Award in 1995, in recognition of its positive impact on the water quality of Jersey’s famous bathing beaches.

Jersey has always been at the forefront of initiatives to raise bathing water quality standards. During 1994/5, the island pioneered and presented to the World Health Organization (WHO) a system of grading bathing beaches based on water quality; specifically, the distribution of bacteria within seawater. Jersey then hosted a conference in 1997 when the WHO accepted the island’s approach for international use.

Gerry Jackson, currently Manager of Jersey’s Water Resources section, with overall responsibility for the quality of the island’s aquatic environment, as well as its water resources (both wastewater and drinking water management), had monitored the performance of the first generation Trojan equipment at Bellozanne at start-up, reporting 'effluent qualities cleaner than the sea we were putting it into!'

In 2000, Duncan Berry, Operations Manager for Liquid Waste, added that he too was very impressed with the consistent performance of the Trojan system, which from the start, proved so reliable that only one day’s disinfection has been lost in the past eleven years.

In January, 2003, Trojan won another contract from the Waste Management section of Jersey’s Public Services Department for a complete upgrade of the Bellozanne UV wastewater treatment plant following a competitive open-bidding process. Rather than supplement the existing system, efficient as it is, and in order to handle the greater flows now required - as well as conform with the island’s recent legislation governing enhanced water quality - it was decided to invest in state-of-the-art UV technology again.

The new, advanced technology TrojanUV3000™Plus will ensure optimum performance while achieving cost and space savings through the use of fewer (higher-output, low-pressure) lamps. It will have an effective self-cleaning system, the Trojan ActiClean™ system, which will eliminate the need for out-of-channel lamp cleaning. The TrojanUV system also features very compact control panels due to the ballast being plant-mounted. On-line dose monitoring will be an integral part of the new installation, in accordance with the discharge certification requirements of the island’s Water Resources rules.

The TrojanUV3000™Plus, destined for Bellozanne, will effectively disinfect both sewage wastewater as well as storm water at a peak flow rate of 1,350 litres/sec - compared with the existing system’s treatment rate of 1,000 litres/sec. While it provides for substantially increased capacity, the new Trojan system has the added advantage of fitting within the existing channels - an important consideration in terms of reduced installation costs. The old and new plants can operate in tandem during installation, without compromising disinfection capability.

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