Abstract
Hydrodynamic cavitation (HC) is a green technology that has been successfully used to intensify a number of process. The cavitation phenomenon is responsible for many effects, including improvements in mass transfer rates and effective cell-wall rupture, leading to matrix disintegration. HC is a promising strategy for extraction processes and provides the fast and efficient recovery of valuable compounds from plants and biomass with high quality. It is a simple method with high energy efficiency that shows great potential for large-scale operations. This review presents a general discussion of the mechanisms of HC, its advantages, different reactor configurations, its applications in the extraction of bioactive compounds from plants, lipids from algal biomass and delignification of lignocellulosic biomass, and a case study in which the HC extraction of basil leftovers is compared with that of other extraction methods.
Highlights
The sustainable valorisation of bioresources for the production of value-added products and biofuels [1,2,3], has become a hot topic over the past 20 years looking for a carbon footprint reduction.Extraction from biomass is often found as a pre-treatment for the production of bioenergy and platform chemicals, while the extraction of bioactive compounds is directly exploited by pharmaceutical, cosmetic, agrochemical and food industries
The design of Hydrodynamic cavitation (HC) reactors (HCRs) and parameter studies offer much knowledge that aids in the development of innovative, eco-friendly and efficient processes
An example of this can be found in the rotor-stator device (RSD), which was developed by the University of Ljubljana
Summary
The sustainable valorisation of bioresources for the production of value-added products and biofuels [1,2,3], has become a hot topic over the past 20 years looking for a carbon footprint reduction. During extreme implosion of cavitation bubbles, which is caused by a drop and successive rise in local pressure [27] In this context, both the production of low-value bioenergy (biogas, bioethanol and biodiesel) and added-value chemicals (antioxidants and follow-up products based on lignin and cellulose) can be accomplished thanks to efficient delignification and the extraction of intracellular components using HCE. Both the production of low-value bioenergy (biogas, bioethanol and biodiesel) and added-value chemicals (antioxidants and follow-up products based on lignin and cellulose) can be accomplished thanks to efficient delignification and the extraction of intracellular components using HCE The latter is a new strategy and an alternative method that can provide highly efficient, convenient and low-cost extractions. The design of HC reactors (HCRs) and parameter studies offer much knowledge that aids in the development of innovative, eco-friendly and efficient processes
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