The use of the CROWN® Surface Aerator with a crusher unit enables the construction costs to be reduced since mechanical cleaning is not required. The maintenance effort is minimized because the crusher does not require any noteworthy maintenance. Energy and residual material disposal costs are also reduced since mechanical pre-cleaning is dispensed with and the screenings are classified as hazardous waste in many places.
Furthermore, extremely compact wastewater treatment plants can be manufactured by using the crusher. An SBR wastewater treatment plant from BIOGEST® can only consist of an SBR reactor under the relevant project framework conditions since there is no need to produce a mechanical pre-cleaning stage or a sludge silo. The use of the crusher is generally only recommended for sewage treatment plants that are fed with wastewater via a separate sewer system.