A review of sustainable and intensified techniques for extraction of food and natural products
This review presents innovative extraction techniques and their role in promoting sustainable ingredients for the food, cosmetic and pharmaceutical industries. These techniques (such as microwave, ultrasound, pulse electric field, instant controlled pressure drop, sub- and super-critical fluid processing, extrusion, mechanochemistry, high pressure, and ohmic, UV and IR heating) use or produce less solvent, energy, and hazards. This review will provide the necessary theoretical background and some details about green extraction techniques, their mechanisms, some applications, and environmental impacts. We will pay special attention to the strategies and present them as success stories for research and education and at the industrial scale.