Germany – Architectural services for buildings – Planungs- und Bauüberwachungsleistungen für das Betriebsgebäude der zentralen Kläranlage der Verbandsgemeinde Adenau in 53520 Dümpelfeld, Los 3 - Objektplanung Gebäude

The municipality of Adenau operates, among other things, the mechanical-biological central wastewater treatment plant "Adenauer Bach" in Dümpelfeld (KA Dümpelfeld) with a current capacity of approximately 20,000 population equivalents (PE) for the treatment of wastewater from the municipalities of the municipality of Adenau. The plant, which was commissioned in 1993, was designed to achieve the goal of wastewater treatment with simultaneous aerobic sludge stabilization. Due to the flood disaster in the Ahr valley on 14/15 July 2021, this plant was also flooded and severely damaged. Particularly severe damage affected the plant and EMSR technology, the operating building including transformer station, control room, emergency power generator and equipment hall/garage, as well as the blower stations, all of which were flooded to a height of approximately 1.5 m to 2.0 m and largely destroyed. While the central wastewater treatment plant in Dümpelfeld was able to resume provisional operation a few weeks after the disaster through the joint efforts of the Adenau wastewater works with the help of a large number of disposal specialists, the Bundeswehr, the Federal Agency for Technical Relief -THW- and other institutions, the two wastewater treatment plants located directly on the Ahr, belonging to the neighbouring municipality of Altenahr, in Altenahr (KA Mittelahr) and Mayschoß, were completely destroyed by the flood disaster. Reconstruction of the wastewater treatment plants in the VG Altenahr (Mittelahr) cannot be carried out, particularly due to the extensive measures required to achieve flood protection and the lack of guarantee of future flood resilience. According to the results of an extensive study commissioned by the Ministry of the Environment on "future-proof wastewater treatment in the Ahr valley", the municipal councils of Adenau and Altenahr, as the legally responsible wastewater disposal bodies, therefore decided in February 2022 to connect the wastewater system of the former Altenahr wastewater treatment plant to the central wastewater treatment plant in Dümpelfeld. To be able to receive and treat the wastewater and sludge from both municipalities, the wastewater treatment plant in Dümpelfeld must be rebuilt, renovated, expanded and converted to the process management with sludge digestion. According to the current demand planning, the wastewater treatment plant will be expanded to a capacity of approximately 27,000 PE. The incoming water quantities will be approximately 250 l/s. An optimized future plant operation is aimed at from an energetic and economic point of view with a maximum of plant availability. The possibilities of AI should also be considered and used. The use of AI should include optimization of processes with regard to resource savings and energy efficiency. The aim is to achieve a future wastewater treatment plant operation that is as climate-neutral as possible. Planning with BIM is envisaged.