Increasing capacity of already established plant for biological treatment of wastewater

The innovative use of nanobubbles is as a promising solution for municipal wastewater treatment.
This comprehensive study focused on controlled generation and characterization of nanobubbles in
an experimental setting located in Næstved, Denmark. This project lays the groundwork for
optimizing wastewater treatment processes and holds global significance as a method to increase the
capacity of existing small wastewater treatment plants and to avoid poor treatment of wastewater at
peak periods e.g. in tourist areas. A pilot-scale plant featuring a Sequential Bio-Reactor (SBR) has
been set up at Næstved Renseanlæg to assess the effectiveness of nanobubble technology. This
ensures a highly flexible system for testing the solution and identifying optimal operational
conditions. The nanobubble generator, being an external unit, can be easily installed at smaller
wastewater plants. Vallensved, situated in Sealand, Denmark, is a compact plant designed for 700
PE, experiencing varying wastewater discharge rates between 55-162 m3
/day.