We are running City & Guilds Legionella Control Training Courses thoughout the year. To find out more visit http://www.clearwater.eu.com/about/city-and-guilds or contact us on 08000 937 936 today.

 

News

LEDs & Micropollutant removal

Light emitting diodes (LEDs) use a fraction of the power of conventional lighting and therefore have become a great cost saving alternative for homes and businesses. However, some new research has also now suggested that LEDs that emit ultraviolet (UV) light could also improve water treatment processing by removing micropollutants in wastewater, including harmful organic matter.

 

Wastewater treatment and UV light

This UV-oxidation treatment involves a combination of UV light and hydrogen peroxide, and this is just one of a number of UV-based processes that can be used to remove compounds from water called Advanced Oxidation Processes (AOPs). This research is taking place at Cranfield University, in collaboration with the water industry, and is focusing on implementing AOP on a larger scale.

The direction of research is focusing on micropollutants in wastewater where water is being reused, as our ongoing reliance on pesticides and antibiotics in food production mean that the challenges may get worse as pollutants become greater in all stages of the water cycle. Therefore, innovations in AOPs are crucial to keep on top of the micropollutant issues.

LED’s therefore offer significant advantages as they are considerably more energy efficient and convert less electricity to heat rather than light. They also have a long life with no degradation in performance, and they offer the opportunity to be much more flexible in design. In addition to these benefits there is also the fact that the LED market is growing rapidly, with many different manufacturers supplying them, so their price is becoming much more competitive.

 

The Use of LEDs

The use of LEDs in water treatment processes would be a real innovation for the water industry; however, Cranford University is also looking into addressing some of the limitations of their use. The limitations in LEDs come from their smaller size and so their power output is lower, particularly when providing UV light, and so research is being conducted into new reactor designs that can be engineered to solve existing power issues. Therefore, if the technology advances the capabilities of LEDs further, they could better arm our industry to tackle micropollutants and assist the sector to achieve zero water quality failures.

 

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