The AquaDDM is designed to provide maximum mixing efficiency as an independent mixing source or in conjunction with aeration devices.  For those aeration applications where the mixing energy requirement is greater than the aeration requirement, the AquaDDM will provide mixing more efficiently than a combined aeration/mixing device. This may result in considerable energy savings while providing greater flexibility of operation.
 

Features and Benefits

Low initial cost, and less expensive to install & maintain
Motor options: explosion proof, high efficiency and Endura¢â Series
No couplings, gear boxes or submerged bearings
Suitable for most basin configurations
Downflow discharge eliminates short-circuiting
Standard mooring arrangements
Directional flow option
Horsepower: 3 to 75

Anoxic Mixing with AquaDDM Mixers

Biological nitrogen and phosphorus removal processes can be successfully achieved by establishing anoxic zones within a treatment system and maintaining a high degree of contact between the biomass and the substrate.  These completely mixed anoxic zones can be created with the AquaDDM mixer.
In addition to being highly effective for the denitification process, anoxic mixing can also be helpful as a selector mechanism to control the growth of filamentous bacteria, improving the settling characteristics of the sludge mass.

Accessories

Anti-erosion Plate - for use in those applications in which the AquaDDM is installed in earthen basins.  Easily installed without dewatering the basin.
Directional Flow Assembly - converts the downward vertical flow of the AquaDDM to a horizontal flow.  This arragement is ideally suited for use in long narrow tanks and oxidation ditches where directional flow may be necessary or desirable.

Introduced in 1969, the Aqua-Jet aerator revolutionized the aerator industry, and may possibly be the most specified aerator in the world.  Aqua-Jets are installed in a wide variety of treatment schemes, including activated sludge systems, such as SBRs, MSBRs and extended aeration, as well as aerobic digesters, sludge holding, equalization basins and Lag-Nite systems.

Aqua-Jets are also incorporated into lagoon applications such as complete mix, partial mix (facultative) and dual-power multicellular systems.  No matter what the application, municipal or industrial, Aqua-Jet aerators provide unequalled reliability and long term performance. 

  Features and Benefits

Motor Options: Single, dual or variable speed
Flexibility in materials of construction
Vibration-controlled design
Superior oxygen transfer
Horsepower: 1 to 150

  Internal Structure

A. The motor is totally enclosed, fan cooled and rated for severe duty.  Total maintenance consists of motor bearing lubrication 2-3 times annually depending on motor size.
B. Labyrinth seal guard prevents upward migration of water from contacting the lower end bel of the motor and working into motor bearing.
C. The cast diffusion head is designed to withstand the constant stress from the upflow spray.  It's strong flanged connected to the volute ensures that no vibration or fatigue occurs.
D. The one-piece shaft design eliminates the vibration and maintenance problems inherent in coupled-shaft designs, providing greater strength than 304 or 316 stainless steel.
E. The anti-deflection insert provides support for the shaft should debris be ingested into the unit.  Under normal operating conditions, the shaft runs free of support by the insert.
F. The volute is constructed of heavy wall stainless steel to withstand constant duty in corrosive, abrasive and high velocity propeller-induced flow.
G. The float is filled with a closed cell polyurethane foam that adds to the structural stability and prevents sinking if excessive damage should occur.
H. The propeller is a two blade design cast of 316 stainless steel and features a 180o sweepback for non-clog operation.
I.  The intake cone provides a smooth transition of flow with minimum headloss.
J. The fluid deflector contains the thrust washer and protects the anti-deflection insert from upward liquid flow.
K. The optional draft tube is a volute extension used to extend the intake of the aerator to a greater depth.