Advanced UV treatment: from surface water to drinking water
At the Andijk treatment facility, the water undergoes several treatment steps, including advanced UV treatment, to produce safe and reliable drinking water for consumers in North Holland.
AOP drinking water facility
Andijk, the Netherlands, is home to the world’s first integrated membrane and UV peroxide advanced oxidation plant. Powered by Nedap's UV lamp driver technology.
The drinking water treatment facility in Andijk, the Netherlands, uses UV-based Advanced Oxidation Process (AOP) technology to treat drinking water. Commissioned in 2004, the installation has now been in operation for more than 20 years, demonstrating the long operational lifetime of large-scale UV treatment infrastructure.
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The AOP installation combines medium-pressure UV with hydrogen peroxide (UV/H₂O₂). This process generates highly reactive hydroxyl radicals that can break down organic micropollutants that are difficult to remove using conventional treatment processes.
The facility is equipped with 12 multi-lamp UV reactors, arranged in three rows of four reactors. Each reactor contains 16 medium-pressure UV lamps, resulting in a total of 192 lamps. The lamps are powered by 192 Nedap 12 kW medium-pressure lamp drivers.
During operation, the UV lamps can be dimmed according to treatment requirements. This allows the system to reduce energy consumption when full UV output is not required, while also contributing to longer lamp life. The Andijk installation demonstrates the long lifecycle of large-scale UV infrastructure. More than two decades after commissioning, the original treatment concept remains in operation.
Reliable driver technology
Nedap lamp drivers are designed for efficient and reliable operation over a long service life. With an electrical efficiency of more than 95%, low Total Harmonic Distortion (THD) and a high Power Factor, they help minimize energy losses and reduce the load on the power grid.
Stepless dimming allows the UV output to be continuously adjusted to the actual treatment requirements. This reduces unnecessary energy consumption, prevents UV overdosing and helps extend lamp life. Together, these features support efficient operation of UV installations over many years.
