WesTech - Model Landy 7 - Surface Aerator
From Wastewater Aerator
The most recent advancement to surface aerator technology can be seen in the LANDY-7 impeller. The Landy impellers have always incorporated a sturdy design with zero failures due to cracked, sheared, or broken impeller blades. This new impeller increases oxygen transfer efficiency and reduces axial and radial loads. The LANDY-7 provides a guaranteed minimum efficiency of 3.8 pounds of oxygen per horsepower hour. This improved transfer efficiency saves significant operational costs over the life of the equipment. The reduced axial and radial loads increase the life of the drive unit and reduce the size of support structures and beams for the surface aerators.
Landustrie BV has been a pioneer in the technology of slow speed surface aerators since the 1960’s. The LANDY-F impeller from Landustrie has been extensively tested and later certified for use in oxidation ditch systems by the Carrousel® patent holder, DHV Water BV. Hydraulic models were then developed from full-scale installations to predict the channel velocity given the basin dimensions, proper impeller selection, impeller submergence, and aerator horsepower. Using this hydraulic model, Landustrie has installed their LANDY-F impeller throughout the world. With over 500 surface aerator installations and their research and development program, Landustrie has established themselves as a leader in surface aeration technology.
Landustrie continues their effort to advance impeller technology since they first started over 40 years ago. Landustrie conducts research and development of surface aerators with the use of their 500,000-gallon test tank in Sneek, Netherlands pictured below. The experienced engineers at Landustrie have the ability to test the oxygen transfer efficiency, mixing efficiency, torque, vibration, axial forces, and radial forces. Landustrie has also been contracted by direct competitors to test other types of impellers over different operational ranges. Over the past six years, Landustrie has conducted several studies on their next generation LANDY-7 impeller. From their test tank data and fullscale testing at several wastewater treatment plants, Landustrie can officially document and guarantee the benefits of the new LANDY-7 impeller.
- Increased O.T.E. = 3.8 LB O2/HP/HR
- Increased Mixing Efficiency
- Reduced Axial Loads
- Significantly Reduced Radial Loads
- Reduced Torque Loads