Extended Aeration/Complete Mix Process

An economical treatment system to biologically process wastewater, the efficient Extended Aeration Treatment Plant provides superior performance in meeting your effluent discharge limits. The compact design is suitable for small communities, housing developments, trailer parks, schools, and industrial applications.

The E.A. Aerotor Plant is constructed in a concentric common wall design that incorporates the Closed Loop Reactor (CLR) Process in the outer loop for extended aeration and mixing, while the inner area has the peripheral-feed Spiraflo Clarifier for final settling. Alternatively, a second outer channel could be added for stand-by capacity, allowing efficient treatment for seasonal flow variations and promoting biological nutrient removal.


  • Compact design reduces treatment plants overall footprint
  • Simple operation requires low manpower
  • Capable of handling hydraulic and shock loadings to the biological system
  • Integrated control and instrumentation for optimal process operation