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Severn Trent Services Ltd


Products and turnkey systems design and implementation capability in water analysers/monitors, disinfection equipment using chlorine, electrolytic and U.V. technologies, chemical dosing skids, hazardous gas safety shut-down systems, water audit/metering, waste-water and industrial effluent filtration systems


Mr Alex Lloyd
Arley Drive Birch Coppice Business Park
B78 1SA

Severn Trent Services has recently installed a sodium hypochlorite generation system

Severn Trent Services has recently installed a CT-900 on-site sodium hypochlorite generation system at Ogston Water Treatment Works in Derbyshire. The unit is capable of generating enough hypochlorite for the whole works at maximum site requirement.

Severn Trent Water is the world's fourth largest privately-owned water company with over 8 million customers. The company supplies 1,960MI/day across a region covering more than 21,000 square kilometers.

Historically two electrochlorination systems provided the disinfection requirements for the potable water at a Severn Trent Water site located at Ogston in north Derbyshire. One of the two existing electrochlorination systems required replacement and the decision was taken to invest in a single new electrochlorination plant suitably sized to cater for the whole works chlorination requirements. Severn Trent Services provided two ClorTec" CT-900 on site sodium hypochlorite generators. The two CT-900 units are capable of generating sufficient sodium hypochlorite to satisfy the works demand under average conditions in a 7 hour period. This allows the electrochlorination system to take advantage of the off peak electricity tariffs, ensuring the lowest possible operational costs.

A single generator CT-900 generator is capable of producing sufficient sodium hypochlorite for the whole works at maximum site requirements. This effective provides a duty/standby arrangement for the works, ensuring process security at all times."

System set up
As a refurbishment scheme, the system was required to interface with existing salt saturators and sodium hypochlorite product tanks. However, to cater for the increase in capacity of the new electrochlorination plant both the water softener and Hydrogen dilution fans were replaced. Additionally a hardness monitor was installed to ensure that the water quality to the new electrodes was within acceptable limits.

The ClorTec product range has Secretary of State Approval for use with potable water within the UK and is compliant with ATEX requirements. Severn Trent Services offer comprehensive service packages carried out by in-house service engineers.

About Severn Trent Water
Severn Trent Water is a member of the Severn Trent Group of companies. Severn Trent Plc is an international utility services and environmental solutions company. For shareholder, corporate communications and other group company information, please visit the Severn Trent plc website.
Severn Trent Water is the world's fourth largest privately-owned water company - serving over 8 million customers across the heart of the UK, stretching from the Bristol Channel to the Humber, and from mid-Wales to the East Midlands.

We provide a broad range of water and environmental services to Business throughout the UK. The company currently works in partnership with many of the nation's leading brands offering access to a portfolio of innovative products and services. From taking care of water quality standards through to protecting on-site water and waste water assets, Severn Trent Water can provide business customers with the right solutions, proving environmental leadership and commercial success can go hand in hand.

About Severn Trent Services
Severn Trent Services (www.severntrentservices.com), based in Fort Washington, Pa., is a leading supplier of water and wastewater treatment solutions. The company's broad range of products and services is concentrated around disinfection, instrumentation, and filtration technologies, pipeline analysis, rehabilitation and repair services, contract operating services and state-of-the-art residential metering products and services. Our international management services business provides support in all aspects of water and wastewater utility operational development and business transformation. Severn Trent Services is a member of the Severn Trent Plc (London: SVT.L) group of companies. An international environmental services leader, Severn Trent is a FTSE 100 company.

For further information please email Severn Trent Services Ltd

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