Costing 60 million Euro: Oberhausen Pumping Station on the Holtener Bruch is also currently known as the largest excavation pit in North Rhine-Westphalia. With a diameter of 45 meters and a depth of 45 meters, it is an important cornerstone of the Emscher conversion. The pumping station is one of the largest in Europe. "Supervising such a large and complex planning activity over such a long period of time is an incredible challenge, says Dipl.-Ing.Marc Althoff, the responsible Design Manager. The pumping station is part of the overall planning for the ecological transformation of the Emscher between Dortmund and Dinslaken and will annually feed approx. 170 million cubic meters of wastewater to the Emscher estuary waste water treatment plant. The architecturally accurate visual concept harmoniously integrates the building into the ecological reconstruction of the Emscher. The project comprises the provision of all services related to object and technical planning (structural engineering, technical Equipment)
After 26 years of operation, one of the two parallel-fed disc dryers of the sludge drying plant was replaced by a new one at Waste Water Treatment Plant Düsseldorf-Süd. In order to ensure a constant operation of the facilities, the exchange of the other rotor took place already in 2005. Before the replacement of the second rotor, a study showed that the drying of sludge by means of a new disc dryer represented the most favorable solution in terms of operating costs. With a pipe length of 8.6 metres and a heating surface of 400 m², the new disc dryer 2, partly made of stainless steel, provides a throughput of 5.2 tonnes per hour. As the previous plant part was no longer economically viable, the rotor replacement took place in March 2019. For the replacement of the disc dryer, DAHLEM provides the technical equipment planning, from establishing the basis of the project to the award, including construction supervision.