First NEREDA® reactor in operation at the Kloten-Opfikon WWTP

As a result of the continuous development of the catchment area and increased demands on water pollution control, the Kloten Opfikon WWTP, designed in 1993 for 54,500 PE, is expanded to a capacity of 125,000 PE. This is being done without requiring additional space, made possible with the use of the extremely compact NEREDA® process, which operates with aerobic granular biomass. In summer 2021, the first of 4 NEREDA® reactors was successfully commissioned, followed by two further stages of conversion and expansion starting in December 2021, which will be completed in 2024.


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