Biological treatment of micropollutants

Micropollutants such as pharmaceuticals, personal care products or industrial chemical compounds are difficult to degrade. There is a growing risk that these compounds find their way into our water supply and spread antibiotic resistance. This places growing importance on the removal of antibiotics and other compounds from industry and municipalities.

eXeno™ micropollutant solution

eXeno™ is based on MBBR (Moving Bed Biofilm Reactor) and uses for the biological removal of drugs and other complex compound residuals in wastewater. MBBR relies on microorganisms such as bacteria growing on plastic carriers which are retained in the reactor.

The technology allows the development of biomass with significantly longer sludge retention times (SRT) compared to conventional systems. This encourages the development of slower-growing organisms capable of removing difficult compounds.


  • Effective
    High removal (50-80%) of difficult degradable pharmaceuticals
  • Economical
    The cost of energy and chemical usage is reduced by using more bacteria and less ozone and/or activated carbon
  • Environmentally friendly
    Avoids the release of by-products


AnoxKaldnes’ technologies are found in more than 1,200 treatment plants around the world. Contact us for references related to your specific needs.

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Proven technology with broad application

With more than 25 references worldwide within the pharmaceutical industry, AnoxKaldnes has gained expertise in treating complex compounds. eXeno™ technologies range from complete treatment of pharmaceutical/industrial wastewater and hospital wastewater to tertiary solutions for municipal application.