The Filtration of Landfill Leachate for Energy Crop Recycling (FLLEC) project explored how landfill waste—specifically the polluted liquid known as leachate—could be treated in a more sustainable way. Instead of transporting this waste to treatment plants, which is costly and carbon-intensive, the project investigated how natural filtration and energy crops like willow could help clean the leachate directly on-site.
Led by the Agri-Food and Biosciences Institute (AFBI) and supported by local companies, the project tested different natural materials such as peat, ash, and biochar to filter out harmful substances from landfill leachate. These materials were used in specially designed filter systems, and the cleaned water was then used to irrigate willow plantations. Willow is a fast-growing plant that thrives in wet conditions and can absorb nutrients from wastewater, making it ideal for this kind of treatment.
The team ran experiments over several months, measuring how well the filters removed pollutants and reduced toxicity. Results showed that some filter combinations were effective, especially when used with energy crops. The project also helped build confidence among regulators and industry partners in using nature-based solutions for waste management.
By combining filtration and plant-based treatment, the FLLEC project demonstrated a promising approach to managing landfill pollution while supporting renewable energy production. It also laid the groundwork for future trials and commercial applications across Northern Ireland.