Scope:
At Dunea’s drinking water production site in Katwijk, Bilfinger delivered multidisciplinary engineering for a new powdered activated carbon dosing installation. The system is designed to remove emerging contaminants such as PFAS and pharmaceutical residues from drinking water, in full compliance with stringent Dutch drinking water regulations and KIWA Watermark requirements.
The project was executed under a collaborative framework agreement with Dunea. From the initial concept and feasibility considerations to a fully tender-ready design, Bilfinger supported Dunea throughout all engineering phases.
The engineering scope included:
- Development of system requirements and contaminant-specific design criteria for advanced water treatment.
- Full multidisciplinary integration across civil works, mechanical systems and E&I.
- Design of a fully integrated new-build structure including a concrete foundation, steel superstructure, green roof and utility connections.
- 3D/BIM modelling up to detailed engineering level (LOD300).
- Supply of fittings, recesses, cable and power integration, remote I/O mounting and field cabling in accordance with the implementation design.
- Construction supervision during realization.
All disciplines were delivered in accordance with strict structural, process and compliance requirements inherent to a drinking water production environment.
Key highlights
- Prepared a set of construction-ready specifications and, in our capacity as consultants, we were involved in the Execution Design.
- Only two clarification questions received during the market tender phase, demonstrating exceptional design clarity and specification quality.
- First project for Bilfinger under the collaborative framework agreement with Dunea.
Added value
Bilfinger acted as a one-stop engineering partner, capable of translating an initial conceptual need into a fully specified, compliant and constructible installation. By integrating civil, mechanical, E&I and BIM disciplines in-house, vendor complexity for Dunea was substantially reduced. The ability to manage the complete trajectory from idea to realization demonstrates Bilfinger’s strength as an end-to-end engineering partner.
Collaboration
As a first project in a new client relationship, the collaboration initially required alignment on expectations, governance and communication structure. Bilfinger approached this as a learning opportunity, actively investing in relationship building and structural improvements.
Efficiency & Sustainability
The primary contribution of this project is the removal of micro-contaminants such as pharmaceutical residues and PFAS, ensuring the consistent delivery of high-quality drinking water.
Sustainability was embedded in the design through careful integration of the installation into the surrounding natural area and the use of sustainable material choices. Efficiency was enhanced by applying lessons learned from previous reference projects, resulting in a more streamlined engineering approach.
