Wastewater treatment with microorganisms The market leading AnoxKaldnes™ MBBR (Moving Bed Biofilm Reactor) technology is based on the biofilm principle and is used for biological wastewater treatment. Microorganisms grow on small specially designed plastic carriers that are kept suspended in a reactor. Solutions based on AnoxKaldnes™ MBBR technology offer numerous benefits, such as robust biofilm, flexible reactor design, easy upgrade of existing plants, easy to operate and control, no sludge return needed in most applications, low load on particle separation stage. A part of Veolia Water Technologies AnoxKaldnes is a part of Veolia Water Technologies. With a worldwide network of experts, Veolia Water Technologies provides a complete range of services required to design, build, maintain and upgrade water and wastewater treatment facilities for industrial clients and public authorities.