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At Chausseestraße in Berlin-Mitte, the construction of an approximately 17,000 m3 underground stormwater overflow basin, designed by DAHLEM on behalf of Berliner Wasserbetriebe, has begun. The basin is intended to temporarily store stormwater during heavy rainfall in order to sustainably relieve the sewage system and the Spree River. It is part of Berlin's large-scale storage programme and "disappears" completely under the square on the banks of Süd-Panke. Apart from the operations building, which is architecturally adapted to the neighbouring wastewater pumping station, only a striking steel chimney rises 30 meters above the ground. If the basin is completely flooded within 30 minutes by heavy rain, the exhaust air escapes through this chimney high above the rooftops of Berlin. Currently, a circular diaphragm wall - double excavation pit, with a depth of around 30 m, is being built on the construction site in the immediate vicinity of the headquarters of the Federal Intelligence Service. The completion of the stormwater overflow basin, including the operations building, is scheduled for 2026.

New technology for the environmentally friendly wastewater treatment is now to be installed: By the end of 2022, the Eifel-Rur Water Association is investing around 4,00 million Euros in the conversion of four secondary settling tanks at Wastewater Treatment Plant Aachen-Soers in order to effectively relieve the polluted water load. The ozonation plant has already been built and, as the largest in Europe, integrated into the existing wastewater treatment system. The wastewater treatment plant has been treating the wastewater of the city of Aachen since 1913 and is dimensioned for 458,300 population equivalents. By 2022, four secondary settling tanks will be upgraded step by step with new stainless steel central structures and height-adjustable inlet structures. The DN 700 return sludge pipes will be replaced by new stainless steel pipes. The optimization of the secondary clarification system is expected to increase the capacity by approx. 20%. A joint venture with DAHLEM as lead company has been commissioned with the project and specialist planning. The state of NRW is funding both the large-scale technical implementation and the accompanying research on the entire project of the wastewater treatment plant.

The Video of the Stadtwerke Karlsruhe shows the future project of the watersupply treatment plant Mörscher Wald

[Translate to Englisch:] Das Video des Architekten Martin Willms zeigt den Baufortschritt des Wasserwerks

IIt is almost completed - the new construction of Mörscher Wald Waterworks, for which the ground-breaking ceremony took place in November 2018. The waterworks will be completely rebuilt according to the latest technical standards and will be put into operation on schedule, in 2021. The new building for the 70-year-old plant is constructed on a directly adjacent plot of land. Once the new plant is commissioned, the existing one will be completely dismantled and the area will be reforested. In the future, the new waterworks will ensure the vital potable water supply for the city of Karlsruhe and the surrounding communities. Investigations of the potable water demand up to 2040 showed that due to climate change and the predicted population growth, a capacity of 60.000 m³/d, respectively 3.000 m³/h, will have to be provided in the future as maximum capacity for raw water pumping and treatment. The architectural design of the building provides for a harmonious integration into the forest environment. As a partner in a joint venture, DAHLEM has been commissioned with the design of the engineering structures, the building interior space and the outdoor facilities. A BIM-oriented 3D model was created for the building design.


[Translate to Englisch:]

[Translate to Englisch:]

The 35th BWK Federal Congress will take place in Cologne, October 1st – 3rd, with the leading theme: "Environment and water management focused on climate change". It offers three specialized events:

  • Synergies from flood protection and water pollution control
  • Floods & heavy rain – a 361° panoramic view
  • The Rhine, water and roads, an area of conflict?

all of which have a high level of relevance to the central water management and environmental tasks, therefore a high response rate is expected from participants from the industry, administration, consulting and science. At the accompanying exhibition, DAHLEM will be represented with an information stand - here you are welcome to inform yourself about our services, also in the subject areas of the symposium.

Company News

Since May 2021, DAHLEM has started supporting KUER.NRW as a specialist. KUER.NRW is a funding programme implemented by pro Ruhrgebiet e.V. and Business Angels Netzwerk Deutschland (BAND) on behalf of the Ministry of Environment, Agriculture, Nature and Consumer Protection of the State of NRW. KUER supports "green startups" in North Rhine-Westphalia, founders and startups having an innovative product, process or service idea with market potential in the KUER sectors of climate, environment, energy and resource conservation. Specially accredited KUER mentors, specialists, industry experts and angel investors accompany them through all phases of their startup - from idea generation and the preparation of the business plan to company creation, market launch and financing, tailored to their specific individual needs.

The rising number of extreme weather events increases the risk of flooding, also on company premises and in buildings. Rising costs and fees place an additional burden on companies. It is therefore worth investing in intelligent water management: How can stormwater be collected and used as process water? How can water be infiltrated instead of being discharged into the sewer system? A variety of often easy-to-implement measures prevent damage and save costs. These and other questions were discussed at an online cooperation event organized by Business Metropole Ruhr GmbH and the Emscher Association for Water Management/Lipper Association (Emschergenossenschaft/Lippeverband). Business Metropole Ruhr markets the Ruhr region as a business location and, among other things, supports companies with future-oriented, environmentally-friendly technologies. Professor Dr. Peter Höppe, former head of GEO Risks Research/Corporate Climate Centre Munich, opened the discussion round with his lecture "Too much and too little water - climate change aggravates the extremes", which was accompanied by representatives of the business community and local authorities and during which more than 100 live participants were able to ask questions to the speakers. Holger Ackermann, the responsible person  for water management from DAHLEM, was a participant in the four-person panel. In his view, climate adaptation measures are not an expression of ideology, but of foresight and common sense.

Link to the event (start of discussion from minute 30')

On January 1, 2021, DAHLEM received the ÖKOPROFIT® Company 2021 award. Environment Minister Ursula Heinen-Esser, Mayor Kufen of Essen and around 50 participants met in Zoom as the ÖKOPROFIT® awards were presented virtually for the first time in all of Germany. As a participant in the project, DAHLEM has been implementing numerous in-house measures since 2018 to protect the environment while cutting costs: Reducing electricity and water consumption, introducing e-mobility with cars and bicycles, and much more. The ÖKOPROFIT® Essen-Ruhrgebiet project (Ecological Project for Integrated Environmental Technology) was launched in 2002 by the City of Essen to help companies and institutions establish a feasible environmental management system. "For us, the measures implemented achieved a great record of success. It's good to realize that you can implement many measures for the environment with little effort and at the same time increase the acceptance of environmental protection," says Dipl.-Ing. Markus Küppers enthusiastically.

Our ÖKOPROFIT team, from left to fight: Dr.-Ing. Jan-Gregor Dahlem, Sarah Lukai, M.Sc. and Dipl.-Ing. Markus Küppers