Food preservation techniques and nanotechnology for increased shelf life of fruits, vegetables, beverages and spices: a review

Environmental Chemistry Letters
Adithya SridharAshish Kapoor

Abstract

Food wastage is a major issue impacting public health, the environment and the economy in the context of rising population and decreasing natural resources. Wastage occurs at all stages from harvesting to the consumer, calling for advanced techniques of food preservation. Wastage is mainly due to presence of moisture and microbial organisms present in food. Microbes can be killed or deactivated, and cross-contamination by microbes such as the coronavirus disease 2019 (COVID-19) should be avoided. Moisture removal may not be feasible in all cases. Preservation methods include thermal, electrical, chemical and radiation techniques. Here, we review the advanced food preservation techniques, with focus on fruits, vegetables, beverages and spices. We emphasize electrothermal, freezing and pulse electric field methods because they allow both pathogen reduction and improvement of nutritional and physicochemical properties. Ultrasound technology and ozone treatment are suitable to preserve heat sensitive foods. Finally, nanotechnology in food preservation is discussed.

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Citations

Mar 24, 2021·Environmental Chemistry Letters·Adithya SridharSivaraman Prabhakar

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Methods Mentioned

BETA
thermal treatment
Surface plasmon resonance

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