A Review on Innovative Biotechnological Approaches for the Upcycling of Citrus Fruit Waste to Obtain Value-Added Bioproducts

Every year, the world throws away up to 120 million tonnes of citrus fruit waste—enough to fill millions of landfills. But what if that peel and pulp could become medicine, fuel, and food?

Citrus fruits are more popular than ever, but our appetite comes at a cost. The processing industry generates a staggering 110 to 120 million tonnes of waste annually, burdening landfills and threatening ecosystems and human health. Yet, hidden within this waste lies a treasure trove of bioactive compounds—natural chemicals with antioxidant, anticancer, antimutagenic, and antiplatelet properties. These compounds hold immense economic value, waiting to be unlocked. Innovative biotechnological approaches are now turning this environmental problem into a sustainable opportunity. By recycling citrus waste, we can produce valuable bio-based products, from nutraceuticals to biofuels. This review explores how cutting-edge methods are transforming waste into wealth, reducing pollution while creating a circular economy. The message is clear: what we discard today could power and heal tomorrow.

Key Points

• 110–120 million tonnes of citrus waste annually
• Waste contains valuable bioactive compounds
• Biotechnology turns waste into bio-products