Biogas Potential from Mechanically Sorted Biowaste: Quality, Process and System Effects

A large share of household food waste still ends up in residual waste and is incinerated, despite requirements for separate collection. As a result, a significant amount of biodegradable material is not utilized for biogas production or nutrient recycling. At the same time, knowledge is lacking about the potential of bio-waste mechanically sorted from residual waste (MUOF).

This project investigates whether MUOF can become a new, resource-efficient feedstock for biogas production and digestate use as fertilizer. We conduct the project in three steps:

• We map material composition and contamination levels.

• We carry out lab scale digestion tests and analyse process stability, methane yield, and digestate quality.

• We assess system effects using scenarios and Life Cycle Assessment (LCA), comparing anaerobic digestion with incineration from an environmental and resource perspective.

The project will deliver scientific evidence on whether MUOF can contribute to increased biogas production in Sweden. The results target municipalities, waste management companies, biogas producers, and policymakers. They can support investments, policy development, and new business models for a more resource-efficient and fossil-free energy system.

Photo: Matthew Mentley, Unsplash