Development of a Green Downstream Process for the Valorization of Porphyridium cruentum Biomass

What if one tiny microalga could yield a treasure trove of bioactive compounds—all without harmful solvents? Scientists have now devised a green, sequential process to unlock its full potential.

Microalgae are more than just pond scum—they are microscopic factories of valuable chemicals. Among them, Porphyridium cruentum stands out, naturally producing carotenoids, phycoerythrin, and sulfated polysaccharides. But extracting these treasures without damaging them has always been tricky. Traditional methods often rely on harsh solvents, which are neither eco-friendly nor gentle on the delicate compounds.

Enter compressed fluids. In this study, researchers used pressurized ethanol to optimize carotenoid extraction, finding the sweet spot at 125°C for 20 minutes under 10.5 MPa. But they didn't stop there. They built a sequential process that first recovers polar components like phycoerythrin and sulfated polysaccharides, then extracts carotenoids—all while maintaining stability and yield.

The result? A green, efficient downstream process that could turn microalgal biomass into a versatile source of bioactives. This approach not only valorizes the biomass but also aligns with the growing demand for sustainable biorefineries. It's a win-win for science and the planet.

Key Points

• Pressurized ethanol optimized at 125°C, 20 min, 10.5 MPa for carotenoids.
• Sequential green extraction of phycoerythrin, polysaccharides, and carotenoids.
• Recovery of polar components without compromising carotenoid stability.