Three Valleys Water

Three Valleys Water appointed atg UV Technology to implement measures to reduce the abstraction from sources affecting the river Misbourne. This was achieved by increasing their treatment capacity through the use of Ultraviolet disinfection technology. 

The ever growing need for increased water supplies has forced many water companies to increase groundwater extraction to the maximum allowed rate - this has contributed to vastly reducing visible flows in many rivers.

To help alleviate the problem in the River Misbourne, Three Valleys Water appointed atg UV Technology to implement measures to reduce the abstraction from sources affecting the river and increase those at other locations not impinging on the river. This was achieved by transferring additional water to the Amersham site and increasing treatment capacity through the use of Ultraviolet disinfection technology.

The original treatment at Amersham consisted of gaseous chlorine with contact time. Due to the space limitations and cost benefit analysis, super chlorination followed by de-chlorination was simply to unpractical and inefficient.

atg UV's closed system design was perfectly suited for Three Valleys Water treatment application, as their disinfection policy specifies that disinfection is to be achieved either by chlorination or through irradiation with Ultraviolet light at a minimum dose of 36mJ/cm2, followed by marginal chlorination, together providing protection against micro-organisms, bacteria and viruses such as Cryptosporidium, Poliovirus and Hepatitis.

The atg UV Technology systems comprised of three 7.3KW units arranged in a duty/ assist/standby configuration with a full control system. The plant interfaced with the main station controls to bring on line the minimum number of chambers necessary to achieve treatment.

Automatic wipers were included to prevent the build-up of deposits on the quartz tube, and UV monitoring to ensure the systems consistently run at an optimum level. An integrated state-of-the-art atg UV SPECTRA control system provides Three Valleys operators with data on flow rate, UV dose and lamp intensity, whilst the SPECTRA's built in data logger can provide performance data which can be easily downloaded to a PC or Laptop for review.

In addition, atg UV's Ultraviolet treatment process does not increase the chemical toxicity of the water. Unlike chlorine treatment and filtration, Ultraviolet disinfection reduces the total number of organisms in the environment without the use of chemicals, allowing Three Valleys Water to maintain the natural and sensitive balance of the River Misbournes ecosystem.

atg UV Technology systems have been deployed at numerous water treatment sites within the Three Valleys Water network as well as other major potable water and municipal treatment sites in the UK. With over 25yrs of experience and achievement, atg UV is a world leader in Ultraviolet technology. Strong commitment to innovation and development means that atg UV's range of Ultraviolet products offer customers the best choice available when quality, reliability and consistency need to come as standard.