Project Government building the Hague - Case Study
For the Dutch government building 'Nieuwe Rijkskantoor' located at Rijnstraat 8, The Hague, Landustrie realized a decentralised water treatment plant. This new accommodation for approx. 6000 civil servants from a number of government ministries is equipped to process the wastewater and recover energy and nutrients.
The existing waste streams from the office are treated in the building; the black water from vacuum toilets is collected together with the organic waste in a concentrated manner and processed in a digester tank. The digestion process produces renewable energy in the form of biogas that is used to heat the building. The yellow water from the urinals is processed in the struvite reactor. Phosphate is recovered from the collected urine in the form of struvite. This can be applied directly as fertilizer.
This new installation will pay for itself through savings on water use, water treatment levy and costs of waste treatment and energy. The Ministry building is the largest office where such a sustainable sanitation concept has been applied.