Sustainable design solution for updated rinse water processing Katwijk

Drinking water company Dunea supplies drinking water to 1.3 million customers in the region around The Hague. To be able to continue guaranteeing the quality of the drinking water, the company constantly monitors and improves the production process. Witteveen+Bos and Raderadvies were commissioned to upgrade the rinse water processing of the Katwijk pumping station and integrate it in a historic national monument. A special and challenging project.

In the Katwijk pumping station, the existing rinse water processing with sludge storage must be adapted and extended by adding rapid filters with UV disinfectant.

What made this project special was the application of the rinse water processing in the old, historic filter building, which has not been used for years. Dunea chose to combine the restoration of this national monument dating from 1912 with recommissioning the building for filtering water.

Closed box
Building in this historic filter building created special demands on the project. Because it is a historic building, permission from the heritage committee was required for the extension. For the integration of the process in the historic building, several options were considered. To be able to meet current standards for the safe production of drinking water, it was decided to place the new process installation in a closed box in the existing building.

Process steps of rapid filtration and UV disinfection were added to safeguard the rinse water functionality of the box-in-box structure.

The rapid filters remove the last suspended particles and turbidity in the purified water. This makes it possible to improve the UV extinction of the rinse water. During the design phase, the type of filters was discussed. Based on experiences with previous similar projects and installations and sharing knowledge with other drinking water companies, steel pressure filters were chosen.

The new functionalities were incorporated in one of the existing filter containers. A new concrete structure was built inside.

Sustainable development principles

During the design process, sustainable design principles were an important consideration when looking for design solutions. Companies in the building sector are increasingly under pressure to take responsibility for sustainable solutions. Witteveen+Bos is confident that the projects can help achieve the UN's Sustainable Development Goals. Delivering added value for society is one of the main goals of the projects.

Applying our sustainable development principles reflects this.

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