Water Treatment

Xylem launches adaptable and compact submersible wastewater mixer

Water technology company Xylem has rolled out a compact submersible wastewater mixer with adaptable output capabilities and enabling energy savings of around 50%.

Xylem’s new Flygt 4220 mixer boosts the resilience and sustainability of wastewater treatment plants as it allows operators to manage and later mixing conditions with a simple adjustment of the mixer output. Given that the Flygt 4220 can be controlled to provide only only the desired output, a facility’s energy consumption can be cut down.

Xylem product management director Johan Tegstam said: “Plant operators are looking for mixer technology that enables them to increase operational efficiency, improve performance based on their specific system demands, and provide real-time data to extend product lifecycle and reduce downtime and maintenance costs. The beauty of our new Flygt 4220 mixer lies in its adaptability. Plant operators can easily modify the mixer output, via a tank-side control panel, a programmable controller or plant-wide control system, to match current mixing needs. This functionality dramatically reduces energy consumption compared to traditional fixed output mixers, significantly improves process productivity and futureproofs a facility’s mixing efficiency. We’ve designed the Flygt 4220 mixer to deliver comprehensive information about the mixer’s performance and status, including speed, power, alarms, running time and energy consumption.”

The mixer also comes with several auto-correction functions, including overload control to safeguard equipment and secure process results. Given that wastewater mixing is not a static process, mixing requirements will vary over time based on several aspects such as flow rates, oxygen demand, and seasonal variations. Traditional mixers only run at a fixed output, leading to wasted energy, and increased maintenance due to inefficient operation.

Tegstam added: “The Flygt 4220 mixer fits all common installation systems and is ideal for retrofits, slotting easily into an existing installation. It is a great choice for municipal or industrial wastewater or sludge mixing applications.”

Based on Xylem’s Flygt Dirigo platform of integrated power electronics, the Flygt 4220 mixer includes an IE4 motor that offers efficiency. The mixer is available in 1.5, two, three and four horsepower versions.

The Flygt 4220 has joined the larger Flygt 4320 mixer, launched in 2015.