Pyrogen filterA pyrogen filter is a special type of filter used in water treatment to remove pyrogens from the water. Pyrogens are substances that can cause an immunological reaction in the body, in particular an increase in body temperature. As a rule, these are endotoxins that are released by bacteria such as Escherichia coli (E. coli). The pyrogen filter consists of a filter element that has a very fine pore size, typically in the range of 0.1 to 0.2 micrometres. This allows the filter to effectively retain particles and microorganisms, including pyrogenic bacteria that may be present in the water. In the modular water treatment system, the pyrogen filter is used after other pre-treatment stages such as filtration and disinfection. After the water has been cleaned of particles and microorganisms, it is passed through the pyrogen filter to remove any pyrogens. Pyrogen filters are particularly important in industries where the absence of pyrogens in the water is crucial, for example in the ambulatory care sector to ensure the optimum quality of instruments for operations. Overall, pyrogen filters play an important role in water treatment to ensure the quality and purity of water and minimise potential exposure to pyrogenic substances.