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Engineering services – wastewater treatment plant modernization – general planner 2026 Tender
••••• Municipality
In context
This is a contract notice published by a government body covering consulting. Bids are invited through an open procedure. Delivery covers Switzerland (Europe). It is classified under Water and Climate Adaptation against the sustainability taxonomy rather than matched on keywords.
This tender procures general planning and engineering services for the modernization and regulatory compliance of a wastewater treatment plant in Switzerland, including micropollutant treatment infrastructure. The ideal bidder is an engineering consultancy with expertise in wastewater treatment design, environmental compliance, and infrastructure modernization.
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About this tender
Engineering services for the general planning (planificateur général) of the Châteauneuf wastewater treatment plant (STEP) modernization and compliance project. The STEP, operated by the Ville of Sion, treats wastewater from the right bank of the Rhône and several neighboring municipalities. The project requires integration of micropollutant treatment in compliance with the Water Protection Ordinance (OEaux). A feasibility study and preliminary project summary were conducted between 2023 and 2025 by CSD Ingénieurs. …
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