Energy efficiency at German sewage treatment plant improved with screw blowersWater World, August 4, 2014
In an effort to supply energy-efficient compressed air to process sewage at a treatment plant in the town of Versmold, Germany, two Atlas Copco ZS 55+ oil-free screw blowers with variable speed drive (VSD) have been installed. As a result of the efficiency of the VSD, the plant has achieved energy savings of 10 percent, which means lower sewage fees for customers.
The plant cleans around 3 million gallons of sewage water every year. Sixty percent of this comprises industrial sewage, and the remainder is domestic sewage from Versmold. Specific to the plant is the high proportion of industrial customers from the meat processing industry, which generates varying rates of high polluting loads and above-average quantities of phosphate that are a challenge for the plant to handle.