Summer 2024: Greenhouse trials

Pilot 3 activities, i.e. greenhouse trials, are the last step in the ReNutriWater project plan, to experiment with the use of reclaimed water. Having completed testing of different disinfection methods of wastewater and adjusting the nutrient composition of the reclaimed water in previous pilots, the project is finally testing the use of the reclaimed water on plants.

On the island of Samsoe, Denmark, the growing season is off to a great start! Since being sown the corn has sprouted and grown to a length of 120 cm. The visual change over a month and a half is remarkable. The corn is being irrigated with reclaimed water from the local water utility and grown in designated greenhouses on the premises. The control group of plants are grown in the same greenhouse to ensure comparable conditions. The sample sizes are small, but they lead the way to finding local solutions.

The overall aim of the greenhouse trials is to develop competencies in the recovery of water from urban wastewater. ReNutriWater will not solve all the problems, but we want to make a significant milestone in the development of this area of water management. Through these greenhouse trials we want to show local governments, municipalities and water utilities what the opportunities and the threats of embracing reclaimed water are. In the long run this could lead to a reduction in the use of artificial fertilizers and alleviate the eutrophication of the Baltic Sea.

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