Germany – Architectural, construction, engineering and inspection services – Ertüchtigung KA Kamp-Bornhofen - Los 02

The wastewater treatment plant at Kamp-Bornhofen is operated by the Verbandsgemeindewerke Loreley and is approximately 30 years old. It was originally designed for about 1,700 population equivalents (PE) and constructed in a compact design within an operating hall. Based on current operating data evaluations (2018-2022), the actual connected size is already at 2,163 PE. Taking into account planned residential and commercial developments, a future load of 2,274 PE is expected. For a future-proof design, the new plant was therefore dimensioned for 2,700 PE. The existing plant has reached its hydraulic and material performance limit. At the same time, the permitting authority has announced tightened discharge conditions. In particular, a reduction of the phosphorus limit value from the current 6 mg/l to 2 mg/l in the future is planned. Without a fundamental upgrade, the long-term compliance with water law requirements and further settlement development in the catchment area cannot be guaranteed. The aim of the project is therefore the sustainable expansion and modernisation of the wastewater treatment plant to ensure the future expansion size, to comply with the tightened discharge values and to continuously improve water protection in the catchment area of the Rhine. In the course of a feasibility study, several technical variants were examined. A conventional activated sludge process with horizontally flowing secondary settling (Variant 1.2) was identified as the preferred variant. The planned measures include in particular: - New construction of a screening-roller grit trap compact plant - New construction of an aeration tank (approx. 965 m³) - New construction of a horizontally flowing secondary settling tank (68 m² surface area) - New construction of a sludge storage tank (approx. 310 m³) - New construction of an outlet measuring structure - New construction of an operating building for pumps, blowers and electrical engineering. (In the present case, the building does not serve as a classical high-rise building, but essentially functions purely as a structural and functional shell for the machine technology to be accommodated. The building geometry and building physical requirements are predetermined by the process engineering parameters of the machine technology.) The design is carried out according to DWA-A 131. The future discharge values meet the tightened requirements for CSB, BOD5, nitrogen and, in particular, phosphorus (< 2 mg/l). Special challenges of the project are the location in the designated floodplain of the Rhine, the cramped site conditions between the railway line and the federal highway, as well as the necessity of implementation during ongoing operation. The construction measure will therefore be implemented in several construction phases to ensure wastewater treatment throughout the entire construction period. The measure makes a significant contribution to water protection, in particular to the reduction of nutrient inputs into the Rhine, and at the same time secures the municipal infrastructure and further urban development of the municipality of Kamp-Bornhofen.