EIMCO Surface Aerators - CMS

EIMCO Surface Aerators
Economy, Efficiency AND Reliability
Our low-speed surface aerators provide
economical mixing and aeration in a
wide range of wastewater treatment
applications, including;
• Conventional & complete-mix
activated sludge
• Contact stabilization
• Extended aeration
EIMCO aerator design and construction
reflects forty years of research, testing
and experience in oxygen transfer
mechanics and the hydraulics of aeration
basins. EIMCO aerators deliver a costeffective
combination of optimum
transfer and mixing efficiency,
mechanical reliability, operating
flexibility and low installed cost.
Aeration and Mixing Efficiency
As the aerator's inverted-cone impeller turns,
a strong pumping force is created, raising a
column of water and throwing it outward in
a fine stray of small droplets. The large
air/liquid interface area formed provides
excellent gas transfer. Large pumping
capacity ensures the consistent mixing
essential to activated sludge processes.
Proven Mechanical Reliability
All of our aerators use drive motors
and gear reducers specifically designed
and built for extended service in
corrosive, high moisture environments.
Conservative bearing life and service
factor specifications provide ample
reserve strength for variable operating
loads and stresses. Casings are
completely sealed and non-lubricated
parts are protected against moisture and
contaminants with epoxy paints and
non-hygroscopic coatings.
Inverted cone impellers and drive shafts
are designed to meet stringent thrust
and radial load requirements, and are
fabricated as an integral unit. Straight,
radial blades operate with equal
efficiency in either direction without
fouling. Horsepower draw is readily
varied by one of two methods: changing
the depth of impeller submergence or
2
use of a two-speed drive motor.
Impeller submergence can be
changed by raising or lowering
the water level by means of an
adjustable sliding weir. Two-speed
motors are available in two ranges:
1800-1200RPM and 1200-900
RPM.
Choice of Mounting
Arrangements
Our aerators can be installed on
fixed platforms and bridges, or on
floating platforms buoyed by FRP
pontoons. Ballast compartments
in the pontoons provide variable
buoyancy for power draw
adjustment.