CO2 to Protein: Yeast Surpasses Traditional Feeds in Sustainability

CO2 to Protein: As global protein demand surges, researchers are turning to single-cell protein (SCP) from yeast as a sustainable alternative. A breakthrough study demonstrates how Candida utilis—a protein-rich yeast—can efficiently convert dihydroxyacetone (DHA), a compound derived from CO₂ or methanol, into high-quality SCP. This approach bypasses traditional reliance on agricultural sugars or waste, aligning with next-gen biorefinery methods to address food security challenges.

When grown on DHA, the yeast achieved 60.1% protein content by weight, with essential amino acid levels surpassing soybeans, fish, and other animal feeds. Its nutritional profile met FAO/WHO standards, while fermentation tests in a 5 L bioreactor showed rapid growth (1.3 g/L/h) and high biomass yield (34.8 g/L), proving scalability.

This innovation highlights SCP’s potential to replace resource-intensive protein sources. By leveraging C1 compounds like CO₂, the method reduces reliance on farmland and cuts emissions. With its high protein yield and adaptability to industrial-scale production, C. utilis SCP offers a viable, sustainable solution for future food and feed supplies. AlphaGalileo/Sp