The way we manage our waste, especially biowaste, has a profound impact on our planet. While the European Union has made strides in biowaste management, a significant amount of potential secondary raw materials is still lost, and the environmental threat from methane-producing biowaste remains.
Despite the 1999 EU Landfill Directive banning biowaste landfills, only 40% of biowaste is currently recycled, leaving a vast opportunity to improve recovery and close nutrient cycles.
The Challenge: Beyond Economic and Technical Aspects
Effective biowaste management isn’t just about finding the cheapest or easiestn solution; it requires a comprehensive approach that considers environmental, economic, and social sustainability. While frameworks like the Global Reporting Initiative (GRI) offer extensive reporting guidelines, their complexity can be a barrier for local stakeholders. There’s a clear need for accessible tools that empower communities to make informed, sustainable decisions.
A Simpler Solution: The RECENT Project’s Assessment Method
Recognizing this need, researchers at the University of Oulu, under the Renewable Energy Empowerment in Northern territories (RECENT) project, developed an easy-to-use sustainability assessment method. This innovative tool evaluates renewable energy investments and waste-to-energy solutions by focusing on environmental, economic, and social sustainability. It utilizes a semiquantitative Likert scale withsimple questions, making complex assessments more manageable for local decision-makers.
Case Study: Puolanka Municipality’s Sustainable Choice
To demonstrate its effectiveness, the method was applied in a case study in Puolanka, a small Finnish municipality. The assessment evaluated three distinct biowaste treatment scenarios:
1. Co-digestion: Transporting biowaste to an existing biogas plant in Oulu.
2. Composting: Sending biowaste to a composting facility in Kajaani.
3. Small-scale Digester: Building a new, local anaerobic digestion (AD) plant within Puolanka.
The assessment, conducted through simple questionnaires and visualized using radar diagrams, revealed clear insights. Scenario 2 (composting) was identified as the least favorable due to high carbon emissions and a lack of socioeconomic benefits. Both Scenario 1 and 2 also presented long payback times.
However, Scenario 3 – building a local AD plant in Puolanka – emerged as the optimal choice. This option promises clean energy production, lower costs, local job creation, and promotes a circular economy by producing organic fertilizer.
Anusha Airi
The association has awarded a scholarship to Anusha Air in 2022.