Danfoss VLT 8000 AQUA Variable Frequency Drive
Four Wisconsin wastewater treatment facilities employ the Danfoss VLT 8000 AQUA VFD to save energy while optimizing the levels of oxygen in their systems.
The VFD’s computer display allows for constant monitoring of the dissolved oxygen levels in the aeration basin. Knowing this real-time information, “It’s a lot more efficient for us now that we’re not spending our time adjusting hardware,” says Bob Salmi, a plant manager. “We’re on a once-a-year maintenance schedule. Everything is so trouble-free.”
Combining variable and constant-torque performance with a variety of user-friendly features, the drive is specifically designed to match each aerator’s output to the actual demand for dissolved oxygen. This increases both plant capacity and process efficiency, and reduces energy costs by as much as 50%. These increased energy savings help quickly recoup the cost of the initial investment.
Plant managers report that the Danfoss system is easy to set up and operate, features less pump noise than its counterparts, provides built-in harmonic distortion protection, and offers a versatile data display and quick setup menu. When paired with the Danfoss pressure transmitter and pressure switch, the system maintains optimal flow rates, allowing the VFD to speed up or slow down as needed.
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