Pilot 3. Breaking barriers for reclaimed water use

Pilot 3. Breaking barriers for reclaimed water use aimed to develop practical applications to address barriers to the use of reclaimed water. The objective was to demonstrate that reclaimed water can be safely used for irrigation and as a nutrient source without requiring significant investments in existing wastewater treatment infrastructure.

The pilot included greenhouse trials to grow different crops with water reclaimed from wastewater. This approach is particularly relevant in regions where reclaimed water is not yet widely accepted or where external factors, such as water scarcity, are not major drivers for adopting sustainable water practices.
Greenhouses have been located at:

• Savonia University of Applied Sciences, Kuopio, Finland,
• Samsø WWTP, Denmark,
• Ugāle WWTP operated by VNK Serviss, Latvia,
• WWTP in Wołkowyja, Poland.

Therefore, treated wastewater from different treatment plants was used in the pilots. As part of Pilot 3, common corn was cultivated in one growing season. Cultivation began in the spring of 2024, but the exact date depended on the weather. In southern Poland, it was possible earlier than in Kuopio or Ugāle.

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