Oxidisation strength of Hydroxyl Radicals

Helping to destroy waterborne organisms

The process uses a Titanium vessel with a patented titanium dioxide crystal coating on the internal surface. This reacts with certain wave-lengths of Ultra Violet light(UV) to produce Hydroxyl Radicals.

These Hydroxyl Radicals are the highest rated oxidant for killing and destroying waterborne organisms. The killing rates of the Hydroxyl Radicals are higher than all other commercially available oxidation systems.

In order to compare the effectiveness of the Hydroxyl Radical and it’s relative oxidation strength we have set out in the table below the simple performance comparisons of the various oxidation methods.

Testing

To validate the Advanced Oxidation Process the system was tested in 2008 to KIWA guidelines at the Vitens Laboratory in The Netherlands using concentrations of Legionella that were many times more than it would be possible to encounter outside of Laboratory conditions. The testing protocol used live cultured Legionella Pneumophila that was specially cultivated in live Amoebae in order to create the most extreme conditions to test the killing of bacteria. The concentration of Legionella used was 124,000,000 cfu/litre but due to the cultivation method used there was also 106,000,000 cfu/l of other bacteria present in the testing inoculum. A log reduction of 6 in the number of Legionella Pneumophila bacteria was achieved, the highest possible reading, while the other bacteria were also substantially removed. Previously these bacteria had been in competition with the Legionella which means that the Legionella bacteria could be removed more efficiently when other contaminants are not present. A summary highlight from the report is detailed below.

Results obtained from testing at the Vitens Laboratory in The Netherland

Titanium AOP has been tested and approved by WRAS for use in potable water systems in the UK.