Opening RWZI Weesp

First Full Scale ICEAS commissioned in the Netherlands

On Oct. 14, the official opening of the sewage treatment plant in Weesp took place. The plant has been in operation since February 2020 and is the first in the Netherlands to use the so-called ICEAS system.

During the subsequent symposium ICEAS Weesp van Virtual Reality naar ECHT, professional knowledge and experiences learned during construction and the period thereafter were shared.

Purification in one step

Weesp is the first rwzi in the Netherlands, where the innovative ICEAS system of water technology company Xylem is applied on full scale. The wastewater is treated with activated sludge. The special feature is that the entire treatment process takes place in one step, divided over two tanks. This eliminates the need for pre-sedimentation and post-sedimentation tanks with associated installations. This provides many sustainability and maintenance benefits: the system is energy-efficient and fewer tanks are required, which means fewer raw materials are needed during construction. The system excels in simplicity and is modularly expandable. Virtual Reality and BIM were applied in the climate-adaptive design and realization.

Remco Hoeboer, Mobilis director: "Through optimal cooperation and the use of the knowledge and expertise of all parties, we can now celebrate this joint opening with a successful purification as a result."

Future-oriented expansion

The new rwzi was built next to the old one where the dated technology of oxidation beds was used. This one has since been demolished. Mobilis was the main contractor, with TAUW, Xylem, Pannekoek GWW, RWB, Moekotte and Croonwolter&dros as construction partners.

The Weesp WWTP processes the sewage water of 50,000 population equivalents of Weesp, Muiden and Nigtevecht. During construction, allowance was made for possible future expansion, allowing the capacity to be quadrupled.