Based at a ten-acre site on the banks of the Menai Strait in North Wales, the Roberts of Port Dinorwic food production facility has a screen that captures around 95 percent of its wastewater’s solids, but needed a tough, non-blocking aerator that would further reduce particle sizes and keep solids in suspension by effective, efficient, and economical mixing.
Chief Engineer Dylan Roberts comments, “Landia came highly recommended. In fact, more than half of the tank manufacturers we consulted said that if we wanted the most reliable and long-lasting aerator, it should be Landia.”
Customers choose Landia AirJet systems due to their numerous benefits:
- Easy to install, even in flooded tanks
- Ideal for operation where liquid levels vary
- Self-aspirating, no need for compressed air supply
- Low investment stand-by aeration capacity during peak periods of oxygen demand
- Vigorous mixing capabilities improving oxygen transfer and preventing sedimentation
- Non-clogging aeration system capable of handling liquids with high dry matter content or coarse, unscreened dry matter particles
- Chopper pumps and equipment available in solid stainless steel for aggressive liquids
- Low noise level compared to other systems
- Odor reduction by preventing septicity
“Everything’s brilliant,” Roberts adds. “The Landia AirJet runs for six to seven hours per day and we’ve had no problems whatsoever. We sometimes have high levels of fat as part of close to a tonne of solids per week, but it’s no problem for the aerator. Landia have also done much more than just supply their equipment. They’ve worked very closely with us and the tank manufacturer to ensure that everything is right.”
Featured Image: Landia’s non-blocking aerator reduces particle sizes in Roberts’s wastewater.
Above: Roberts of Port Dinorwic (based on the banks of the Menai Strait) have invested in Landia’s wastewater aeration system.
Established in 1924, the fourth-generation family-run Roberts business, which is a trusted leader in the prepared food industry, purchased a 38,570-gallon tank, which now uses the externally-mounted 7.5kW Landia AirJet aerator. Effluent temperatures are up to 113 degrees Fahrenheit (45 degrees celsius), with dissolved solids of around 3 percent. In addition to the AirJet, wastewater is also processed by a DAF plant and treated with polymer.
The AirJet comprises one of Landia’s renowned no-nonsense chopper pumps (Landia invented the chopper pump in 1950). Designed with an external knife system that stops solids from entering the pump’s casing, the pump is fitted with a venturi nozzle to create the AirJet, of which there are thousands in service, worldwide.
The benefits of the Landia AirJet aeration and mixing systems are created by the unique concept of combining a highly efficient air ejector with chopper pumps, and may also be used in conjunction with supplementary mixing systems, for optimum oxygen transfer rate.
As a world leader, Landia offers below surface aeration and mixing technology combined with chopper pumps. Combining chopper pump aeration systems with Landia submersible mixers provides the most beneficial approach to energy efficient and customized solutions even when treating the most difficult mediums. ◆
Soren Rasmussen is the director of Landia, Inc. For more information about Landia’s range of applications, call 919.466.0603, email , or visit www.landiainc.com.
MODERN PUMPING TODAY, October 2017
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