Major order: 12 HUBER Multi-Rake Bar Screens RakeMax® for Vienna

The Danube metropolis Vienna is world-famous for its New Year's Day concert that is performed by the Vienna Philharmonic Orchestra and broadcast worldwide every year and as native city of the "Waltz King" Johann Strauss and world musician Falco. But it was not so long ago that the heavy bomb damage to the sewer system during World War I and II was rehabilitated in 1950 so that the city of Vienna could start with planning the treatment of the city's wastewaters.

At first, two small plants were built in the southern part of Vienna, the first of them went into service in 1951. In the sixties, when the planning phase for the Vienna main sewage treatment plant started, there had been plans to build an own plant for the districts Floridsdorf and Donaustadt on the other side of the Danube but these plans were abandoned. It was decided that the wastewater from "Transdanubia" should flow to the main sewage treatment plant through a 567 m long structure under the Danube. Simmering, the topographically deepest point of Vienna, was selected as location for the Vienna main sewage treatment plant.

As one of the largest sewage treatment plants in Europe at that time, the plant was put into operation by Vienna's mayor Leopold Gratz in 1980. In 2005, the second biological treatment stage was put into operation to ensure the state-of-the-art treatment of the city's wastewaters and prevent that the Danube water quality is impaired.

The Vienna main sewage treatment plant is presently laid out for 4.0 million PE60 and the maximum flow rate of 18 m³/s during storm conditions.

In 2013, in the run-up to the widely noticed EOS project, ebswien hauptkläranlage Ges.m.b.H. and the engineering office commissioned by ebswien thought about how to significantly increase and optimize the screenings separation rate.

In a number of meetings HUBER supported the planning office with advice and recommendations. Several technical proposals were developed but finally the HUBER RakeMax® variant turned out to become the most probable solution. Moreover, IFAT 2014 gave us the chance to convince the decision makers of ebswien by showing them our RakeMax® screen on our exhibition stand. There, they got to know HUBER as a competent future partner and supplier.

The project could then be finalized at the beginning of 2015 and the order was placed with HUBER. Now, ebswien hauptkläranlage Ges.m.b.H. intends to modernize the existing sewage screening plant and add a fine screening plant in the eastern part of the grit trap building.

 
The fine screening plant offers high-quality technology on a small footprint – possibly unique in Europe in this form. After all, one can read on every Vienna city limits sign: "Vienna is different“ – why should this not also apply to the Vienna's main sewage treatment plant?

Test operation of the first tow coarse and fine screen lines was successfully finished meanwhile. Presently, the third line is being installed and will soon be put into operation.

It is planned to complete the six new screen lines and hand them over to ebswien Hauptkläranlage Ges. m. b. H. by the end of 2016.