Gardner Denver Industrials Group, a leading global manufacturer of industrial compressors, blowers, pumps and vacuum products; When Robuschi tested its innovative Robox energy WS 65 magnet screw compressor in Dimaro’s civil wastewater treatment plant in the Province of Trento, the new technology performed way beyond the client’s expectations.
The Dimaro plant presents an unusual challenge. While all other treatment plants in the area feature canonical 4.5m-deep oxidation tanks, the Dimaro tanks are 7m deep. In addition, the plant is located about 800m above sea level, resulting in a significantly lower atmospheric pressure compared to other sites.
When Robuschi introduced a low pressure Robox screw compressor with a conventional motor. The new compressor was able not only to replace one of the existing Robox lobe evolutions, but actually met the entire plant’s requirements on its own. The Dimaro owners and managers were once again delighted with the results of newly purchased Robuschi ROBOX energy WS 65 compressor in July 2016.
The configuration of Robox energy (which integrates both the inverter and the electric dashboard internally) also allows for an easy and effortless installation process. Along with continuous, faultless operation since December 2015, the Dimaro wastewater treatment’s Robox technologies also allow it great flexibility.
Robox energy has become the plant’s main machine. It runs alongside the company’s traditional screw compressor unit, which acts to compensate for any marked load increases during the summer tourist season or at other times of high demand. It also operates as a spare machine if the main compressor needs inspections, maintenance, or repairs.
Giovanni Stancher, Production Warehouse Manager of Provincia Autonoma di Trento wastewater treatment plants, comments, “This way we have a complete system comprising just two units that can work either together or in rotation while also giving us maximum flexibility.”
Indeed, one of Robox energy’s most interesting features is its versatility. Its Smart Process Control analyses process data and modifies the machine’s operation to match the varying oxygen supply required throughout the day.
Stancher explains, “Water requirements are not constant: there are peak periods followed by various falls and rises. It’s the machine’s job to maintain a constant oxygen level according to the value set. This feature, made possible by the integrated inverter, prevents the on-off alternation that would decrease plant efficiency. In addition, it prevents peaks in oxygen flow, thus improving the quality of the wastewater treatment. The advanced ROBOX technology therefore simultaneously saves energy and optimises the quantity of oxygen, with zero waste.”
For the plant owners and managers, the new compressor delivers lower running costs, fewer problems and therefore, greater savings.