Fast-track delivery of HST turbocompressor

Better efficiency within 36 hours at ERZO in Switzerland

The waste disposal company ERZO was the first Swiss customer who ordered a turbocompressor of the range HST 2500, in 1997. One year later, as the construction of the treatment facility proceeded, Sulzer installed additional compressor units. Meanwhile, the waste disposal company runs two HST 6000 and four HST 2500 turbocompressors. The latest addition is a new HST 2500 turbocompressor that replaces the first generation compressor installed in 1997.

Efficiency improvement, fast replacement of HS 2500 turcompressor in 36 hours at Erzo waste disposal company, Zofingen, Switzerland

The challenge

After almost 20 years of intensive operation, an update of the electronics of one of the oldest HST 2500 turbocompressors was required. Lately the operator had to switch to manual use on a regular basis to ensure sufficient air supply for the biologic process of the facility.

A solution was needed. Initially the operator planned to update the turbocompressor with a new electronic system.

The solution

Since May 2016, Sulzer has offered selected HST 2500 and HST 20 turbocompressors for delivery within 36 hours from the factory in Finland. This fast-track opportunity came at exactly the right time for ERZO. In order to benefit from all the value-adding advantages the new turbocompressor generation offers, ERZO decided to replace the old turbocompressor.

Thanks to the competent and rapid support from Sulzer’s partner BRA turbo Ing AG in Switzerland, the decision was implemented promptly. A HST 2500 turbocompressor from the fast-track process of Sulzer was selected, ordered and delivered.

The experienced BRA turbo team dismounted the old equipment and installed the new HST 2500 turbocompressor.

Thanks to the fast replacement, efficiency and environmental water protection could be ensured within 36 hours. Adrian Burkart, Division Manager ARA ERZO

Customer benefits

  • Fast delivery, installation and start-up
  • Installation and commissioning during continuous operation
  • Low energy consumption
  • Minimal maintenance required, low noise level
  • No oil lubrication or other polluting liquids
  • Reduction of the CO2 footprint of the treatment plant

The Sulzer difference

  • Delivery within 36 hours
  • Up to 50% savings in energy costs
  • Maintenance-free operation
  • Short payback time
  • Low operation costs
Product specification

HST 2500-1-90-40-F turbocompressor

Airflow range 1'000 - 3'700 Nm³/h
Pressure rise 30 - 85 kPa
Input power 90 kW
Power supply 380 - 500 V
Input frequency 50-60 Hz
Protection class IP33D
Thermal protection PT100
  • HST™ turbocompressor
    HST™ turbocompressors are widely used in wastewater aeration and low-pressure industrial processes. The energy-saving and silent HST turbocompressor features proven magnetic bearing technology and a high-speed motor optimized for the duty.
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