GALEX X730 for Low-Head Aeration in Dairy Effluent Treatment

GALEX has specified the Axion One X730 for biological aeration in dairy effluent treatment. Aeration typically accounts for around half the electricity consumed at a wastewater treatment facility, and the biological stage runs continuously, so small differences in blower performance multiply across every operating hour.

Basin depth sets the duty. At diffuser submergence of around two metres, static head is roughly 20 kPa; adding diffuser and pipework losses puts the operating point in the low twenties. The X730 is rated at 7.5 kW, with a rated discharge pressure of 30 kPa and a maximum of 38 kPa.

It is sized for the duty rather than over-specified against it, with margin covering diffuser fouling and peak load instead of unused capacity. As a low-head machine by design, it is not intended for deep-tank service.

Dairy effluent reaches the biological stage in batches following cleaning cycles and production runs, so oxygen demand swings across the day. A fixed-speed machine answers a moving load with constant output, and the surplus is throttled or vented.

The X730 carries an integrated variable-frequency drive, so output follows demand instead of holding a fixed duty point, and shaft power falls with speed. Its oil-free, contact-free design removes gearboxes, belts and lubrication from the maintenance schedule.

Integrated support for the full RS-485 Modbus sensor range allows dissolved-oxygen feedback to drive output directly, removing the lag between a load change and the blower response.