4. Life Cycle Assessment (LCA) of yeast feed cultivated on anaerobically digested food waste

Last changed: 01 March 2022

In this project we are doing a life cycle analysis (LCA) where the environmental impact of the new feed as used in aquaculture will compared to a conventional feed of equivalent nutritional value (e.g. soy). This part of the project will also determine whether this process is a better and efficient way to recycle nutrients from food waste than composting or biogas production.

We evaluate the environmental impact of the overall process with LCA methodology focused on GHG emissions, energy and water use, nutrient leakage, land use and ecotoxicity.

Data will be collected from project 1-3 for energy inputs and nutrients for the environmental evaluation. LCA results will be compared to already existing data on the environmental profile of conventional waste processes such as composting and biogas production.

Evaluating the environmental impact

The environmental impact of the new feed product will also be evaluated against conventional feed (soy, cereals, fishmeal) and its applicability for fish production in terms of fish growth based on results in project 3. Sensitivity analysis will be used to identify parameters that can affect the environmental performance of a scale-up of the new process to industrial scale.


Dr Anna Woodhouse
RISE, Research Institutes of Sweden
Department of Food and Bioscience
anna.woodhouse@ri.se, 010-516 66 21