Comparative environmental assessment of valorization strategies of the invasive macroalgae Sargassum muticum

- Four valorization strategies for invasive macroalgae Sargassum muticum were evaluated.
- Supercritical extraction and non-isothermal autohydrolysis caused the highest impacts.
- Electricity consumption was the major responsible for the environmental impacts.
- The combined extraction of alginate and antioxidant was the most efficient route.
- The feasibility of other alternatives strongly depended on the considered approach.