Orange Pomace and Peel Extraction Processes towards Sustainable Utilization: A Short Review

In 2021, the world produced over 58 million tonnes of oranges—and roughly one-fifth of that weight was tossed aside as peel. But what if that 'waste' holds the key to health and wellness?

Every year, the orange juice industry discards millions of tonnes of peels and pomace—a staggering amount of potential going to waste. Yet these leftovers are far from useless. They are packed with pectin, phenolics, and limonene, compounds linked to various health benefits. This short review, covering English-language articles from 2004 to 2022, explores how we can turn this trash into treasure.

The secret lies in green extraction methods. Techniques like supercritical carbon dioxide (ScCO2) extraction, subcritical water extraction (SWE), ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE) can efficiently pull valuable bioactive compounds from orange peels and pomace. These methods are environmentally friendly and yield high-quality extracts.

The review highlights that valorizing orange waste is not only possible but practical. By using these green techniques, we can produce extracts suitable for nutraceuticals—products that support health and wellness. This approach could transform the food industry, reducing waste while creating value.

So next time you peel an orange, remember: that skin is not just a wrapper. It’s a resource waiting to be unlocked.

Key Points

• Orange peels and pomace contain pectin, phenolics, and limonene.
• Green extraction methods include ScCO2, SWE, UAE, and MAE.
• Valorization yields high-quality extracts for nutraceuticals.