Writing Applied food researchResearchers from India’s National Institute of Food Technology Entrepreneurship and Management investigated the current food and non-food applications of citrus processing waste.
The results showed that citrus fruits waste – the seeds, peel, pulp and pomace they represented. “Practically half the mass of fresh fruit”– offered as recycled ingredients due to the plethora of bioactive phytochemicals and flavoring properties they contained. And for cosmetics “High value compounds”How essential oils and unique fragrances made citrus waste a suitable choice, according to the review.
Citrus peel scraps – anti-aging, skin health and lightening
In cosmetics, the researchers said citrus waste could be used in body sprays, body lotions, soaps and creams. “Being a rich source of bioactive compounds, antioxidants, vitamins (vitamin C and E) and polyphenolic compounds, nowadays agro-industrial waste is also used as an active ingredient for skin care products”, The researchers wrote in the review.
“Citrus peel waste is one such agricultural waste that is widely used in the cosmetic industry”,they said.
Citrus peel, high in antioxidants, for example, could be an anti-aging agent, offering anti-collagen and anti-elastase potential, or incorporated into skincare formulas to reduce skin-related problems such as acne. Peel waste, especially orange peel waste, could also be used in skin whitening creams or treatments for dark spots and hyperpigmentation due to its high antithyrosinase activity which leads to melanin pigment lowering. Research has continued in the field of skin lightening formulas and essential oils extracted from citrus peel waste could be used as fragrance components.
“Citrus peels offer vast potential for the enhancement of natural antioxidants, pectin, enzymes and essential oils”,The researchers said, although more research on the “effectiveness”when used in cosmetics it was still needed.
Citrus seeds: “remarkable” properties for soap
In addition to the potential of citrus peel, citrus seeds also offered plenty of it “Powerful and precious compounds” Such as essential oils, polyphenols and carotenoids, the researchers said.
“Being a rich source of natural oil, citrus seeds are used economically in the cosmetic industry for the preparation of soaps, body lotions, body sprays and other cosmetic products”,they wrote.
Citrus seed oil, for example, could be used in medicinal soaps due to its own “Remarkable antimicrobial, antifungal, antiparasitic and antioxidant properties”they said.
The researchers said there was clearly the potential to create value-added products considering the recent work reported on “Recovery and use” Of citrus waste in a variety of applications, including cosmetics.
Future research and industrial frameworks are needed
However, there was more to learn, they said. “It is necessary to explore future research directions for the valorisation of citrus waste as it not only enhances waste disposal problems, but also provides solutions to eliminate environmental pollution.”
Moving on, a “Industrial framework with an idea of circular economy for a possible sustainable approach for the use of citrus waste that leads to zero waste”It would also need to be more widely developed, the researchers said.
Worldwide, Spain, South Africa and Turkey were major exporters of citrus fruits from the EMEA region. Spain, for example, was the largest annual citrus exporter in the world, exporting the majority of oranges, mandarins, lemons and limes each year. In terms of processing, Brazil was the largest citrus processor in the world, followed by the United States, Mexico, Argentina and China.
Source: Applied food research
Published online before printing, doi: 10.1016 / j.afres.2022.100050
Title: “Current applications of citrus processing waste: a scientific perspective”
Authors: S. Suri, A. Singh and PK. Nema