Extended structural works for the fourth treatment stage of the Langen wastewater treatment plant

Summary

The tender covers the expansion of the Langen wastewater treatment plant with a fourth treatment stage designed to remove micropollutants, based on cloth filtration and activated-carbon filtration. This lot concerns extended structural works, including construction for the new treatment stage and the intermediate pumping solution. The tender must be submitted electronically and in encrypted form no later than 1 October 2026 at 12:00. The required forms, a fully priced bill of quantities, at least three comparable references and qualification evidence must be included. Price is the only award criterion; the recommended site visit in calendar week 39 or 40 of 2026 is voluntary.