Harnessing cavitational effects for green process intensification

Wu, Zhansheng; Tagliapietra, Silvia; Giraudo, Alessandro; Martina, Katia; Cravotto, Giancarlo

doi:10.1016/j.ultsonch.2018.12.032

Cited by 44 publications

(22 citation statements)

References 130 publications

(223 reference statements)

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“…Indeed, the residual retention of d-limonene in the aqueous solution, up to sample T27 (30 min, 35 • C) in the WOP2 test (Figure 9a), could have been favored by two factors. First, the likely micronization and partial emulsification of the terpenes in water, based on the well-established effectivity of HC processes in the creation of stable sub-micron oil-in-water emulsions [41,72]. Second, the effectivity of pectin as an emulsifying compound, as well as a stabilizer for emulsions [15].…”

Section: Discussionmentioning

confidence: 99%

Real-Scale Integral Valorization of Waste Orange Peel via Hydrodynamic Cavitation

Meneguzzo

Brunetti

Fidalgo³

et al. 2019

Processes

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Waste orange peel represents a heavy burden for the orange juice industry, estimated in several million tons per year worldwide; nevertheless, this by-product is endowed with valuable bioactive compounds, such as pectin, polyphenols, and terpenes. The potential value of the waste orange peel has stimulated the search for extraction processes, alternative or complementary to landfilling or to the integral energy conversion. This study introduces controlled hydrodynamic cavitation as a new route to the integral valorization of this by-product, based on simple equipment, speed, effectiveness and efficiency, scalability, and compliance with green extraction principles. Waste orange peel, in batches of several kg, was processed in more than 100 L of water, without any other raw materials, in a device comprising a Venturi-shaped cavitation reactor. The extractions of pectin (with a remarkably low degree of esterification), polyphenols (flavanones and hydroxycinnamic acid derivatives), and terpenes (mainly d-limonene) were effective and efficient (high yields within a few min of process time). The biomethane generation potential of the process residues was determined. The achieved results proved the viability of the proposed route to the integral valorization of waste orange peel, though wide margins exist for further improvements.

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Section: Discussionmentioning

confidence: 99%

Real-Scale Integral Valorization of Waste Orange Peel via Hydrodynamic Cavitation

Meneguzzo

Brunetti

Fidalgo³

et al. 2019

Processes

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show abstract

“…Indeed, the residual retention of d-limonene in the aqueous solution, up to the sample T27 (30 min, 35°C) in the WOP2 test ( Figure 10(a)), could have been favored by two factors. First, the likely micronization and at least partial emulsification of the terpenes in water, based on the well-established effectivity of HC processes in the creation of stable sub-micron oil-in-water emulsions [41,72]. Second, the effectivity of pectin as an emulsifying compound, as well as a stabilizer for emulsions [17].…”

Section: Discussionmentioning

confidence: 99%

Real-Scale Integral Valorization of Waste Orange Peel via Hydrodynamic Cavitation

Meneguzzo¹,

Brunetti²,

Fidalgo³

et al. 2019

Preprint

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Waste orange peel represents a heavy burden for the orange juice industry, estimated in several million tons per year worldwide; nevertheless, this by-product is endowed with valuable bioactive compounds, such as pectin, polyphenols and terpenes. The potential value of the waste orange peel has stimulated the search for extraction processes, alternative or complementary to landfilling or to the integral energy conversion. This study introduces controlled hydrodynamic cavitation processes, as a new route to the integral valorization of this by-product, based on simple equipment, speed, effectiveness and efficiency, scalability, and compliance with green extraction principles. Waste orange peel, in batches of several kg, was processed in more than 100 L of water, absent any other raw materials, in a device comprising a Venturi-shaped cavitation reactor. The extractions of pectin, endowed with a very low degree of esterification, polyphenols (flavanones and hydroxycinnamic acid derivatives), and terpenes (mainly d-limonene) were effective and fast (high yield, few min of process time), as well as the biomethane generation potential of the process residues was effectively exploited. The achieved results proved the viability of the proposed route to the integral valorization of waste orange peel, though wide margins exist for further improvements.

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“…After that, the applications of HC have begun to attract attention in a wide variety of areas, especially in the last few years (Figure 1). Nowadays, researchers have found that HC can be an effective tool for a number of chemical, biological, and other types of applications, e.g., microbial inactivation [bacteria (Mane et al, 2020), algae (Waghmare et al, 2019), virus (Kosel et al, 2017)], the removal of organic compounds (acids Choi et al, 2019, antibiotics (Tao et al, 2018, pesticides (Panda and Manickam, 2019), dyes Yi et al, 2018, pharmaceuticals (Rajoriya et al, 2019, fuel (Torabi Angaji and Ghiaee, 2015), phenols Chakinala et al, 2008, etc.,) decomposition of wasteactivated sludge (WAS) (Nabi et al, 2019), depolymerization (Prajapat and Gogate, 2019), denitrification (Song et al, 2019), desulfurization (Gagol et al, 2019), fibrillation (Kosel et al, 2019), intensification of biogas production (Zielinski et al, 2019), biofuel synthesis (Chipurici et al, 2019), liposome destruction (Pandur et al, 2020), catalyst slurry preparation (Nagalingam et al, 2019), viscosity reduction (Gregersen et al, 2019), residual stress relief, cleaning, and emulsification (Wu et al, 2019).…”

Section: Hydrodynamic Cavitationmentioning

confidence: 99%

Hydrodynamic Cavitation: A Promising Technology for Industrial-Scale Synthesis of Nanomaterials

et al. 2020

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One of the most challenging issues for the large-scale application of nanomaterials, especially nanocarbons, is the lack of industrial synthetic methods. Sonochemistry, which creates an extreme condition of high pressure and temperature, has been thereby applied for synthesizing a wide variety of unusual nanostructured materials. Hydrodynamic cavitation (HC), characterized by high effectiveness, good scalability, and synergistic effect with other physical and chemical methods, has emerged as the promising sonochemistry technology for industrial-scale applications. Recently, it was reported that HC can not only significantly enhance the performance of biochar, but also preserve or improve the respective chemical composition. Moreover, the economic efficiency was found to be at least one order of magnitude higher than that of conventional methods. Due to the great potential of HC in the industrial-scale synthesis of nanomaterials, the present perspective focuses on the mechanism of sonochemistry, advances in HC applications, and development of hydrodynamic cavitation reactors, which is supposed to contribute to the fundamental understanding of this novel technology.

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Harnessing cavitational effects for green process intensification

Cited by 44 publications

References 130 publications

Real-Scale Integral Valorization of Waste Orange Peel via Hydrodynamic Cavitation

Real-Scale Integral Valorization of Waste Orange Peel via Hydrodynamic Cavitation

Real-Scale Integral Valorization of Waste Orange Peel via Hydrodynamic Cavitation

Hydrodynamic Cavitation: A Promising Technology for Industrial-Scale Synthesis of Nanomaterials

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