Researchers investigate environmental sustainability of two algae-biorefinery systems

In Iran, an international group of researchers investigated the environmental sustainability of two algae-biorefinery systems that utilize endemic brown macroalgae Nizimuddinia zanardini. The first scenario involved the production of fuel ethanol, and electricity, while the second scenario included the co-production of fuel ethanol, electricity, and high-value bio-based chemicals, i.e., protein, mannitol, and alginate. Combining process simulation tools with consequential life cycle assessment, the study provides a comprehensive evaluation of the environmental impacts associated with the valorization of 1 metric ton of dry algae considering three areas of environmental protection namely human health, ecosystem quality, and resource depletion.