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Valorization of Sargassum muticum Biomass According to the Biorefinery Concept.

Balboa EM, Moure A, Domínguez H - Mar Drugs (2015)

Bottom Line: Hydrothermal processing is proposed to fractionate the algal biomass and to solubilize the fucoidan and phlorotannin fractions.Membrane technology was proposed to concentrate these fractions and obtain salt- and arsenic-free saccharidic fractions.Based on these technologies, this study presents a multipurpose process to obtain six different products with potential applications for nutraceutical, cosmetic and pharmaceutical industries.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas s/n, Ourense 32004, Spain. elenamba@uvigo.es.

ABSTRACT
The biorefinery concept integrates processes and technologies for an efficient biomass conversion using all components of a feedstock. Sargassum muticum is an invasive brown algae which could be regarded as a renewable resource susceptible of individual valorization of the constituent fractions into high added-value compounds. Microwave drying technology can be proposed before conventional ethanol extraction of algal biomass, and supercritical fluid extraction with CO2 was useful to extract fucoxanthin and for the fractionation of crude ethanol extracts. Hydrothermal processing is proposed to fractionate the algal biomass and to solubilize the fucoidan and phlorotannin fractions. Membrane technology was proposed to concentrate these fractions and obtain salt- and arsenic-free saccharidic fractions. Based on these technologies, this study presents a multipurpose process to obtain six different products with potential applications for nutraceutical, cosmetic and pharmaceutical industries.

No MeSH data available.


Effects of different drying technologies on the moisture content of S. muticum (Sm). Parenthesis are used to indicate minutes of condition treatment.
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marinedrugs-13-03745-f001: Effects of different drying technologies on the moisture content of S. muticum (Sm). Parenthesis are used to indicate minutes of condition treatment.

Mentions: Different processes for conditioning of S. muticum (Sm) raw material, including pressing, and oven-, freeze- and microwave-drying were tested. The accomplished moisture reduction is shown in Figure 1. The best systems to remove water content from fresh Sm were oven- and freeze-drying, which allowed moisture reductions of 86% and 94%, respectively. For pressing and microwave-drying, the influence of pressing time, the irradiation power, and irradiation time was studied and a combination of several power and times were evaluated. Microwave-drying reached up to 83% moisture reduction when the operational conditions were two drying cycles of 5 min at 600 W and 5 min at 300 W. In addition, this process produces changes in the seaweed microstructure, such as cell rupture [13], increasing diffusivity and contact surface area, thus enhancing mass transfer and favoring molecular interactions between solvent and solutes during further extraction. Microwave-drying was a quicker alternative for Sm drying, as it was reported by Zhan et al. [14], who reported that microwave drying in combination with other drying methods clearly reduces food drying times. Furthermore, oven-drying was harmful to the phenolic content and antioxidant properties of extracts obtained from oven-dried S. muticum (ovSm) [15].


Valorization of Sargassum muticum Biomass According to the Biorefinery Concept.

Balboa EM, Moure A, Domínguez H - Mar Drugs (2015)

Effects of different drying technologies on the moisture content of S. muticum (Sm). Parenthesis are used to indicate minutes of condition treatment.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4483654&req=5

marinedrugs-13-03745-f001: Effects of different drying technologies on the moisture content of S. muticum (Sm). Parenthesis are used to indicate minutes of condition treatment.
Mentions: Different processes for conditioning of S. muticum (Sm) raw material, including pressing, and oven-, freeze- and microwave-drying were tested. The accomplished moisture reduction is shown in Figure 1. The best systems to remove water content from fresh Sm were oven- and freeze-drying, which allowed moisture reductions of 86% and 94%, respectively. For pressing and microwave-drying, the influence of pressing time, the irradiation power, and irradiation time was studied and a combination of several power and times were evaluated. Microwave-drying reached up to 83% moisture reduction when the operational conditions were two drying cycles of 5 min at 600 W and 5 min at 300 W. In addition, this process produces changes in the seaweed microstructure, such as cell rupture [13], increasing diffusivity and contact surface area, thus enhancing mass transfer and favoring molecular interactions between solvent and solutes during further extraction. Microwave-drying was a quicker alternative for Sm drying, as it was reported by Zhan et al. [14], who reported that microwave drying in combination with other drying methods clearly reduces food drying times. Furthermore, oven-drying was harmful to the phenolic content and antioxidant properties of extracts obtained from oven-dried S. muticum (ovSm) [15].

Bottom Line: Hydrothermal processing is proposed to fractionate the algal biomass and to solubilize the fucoidan and phlorotannin fractions.Membrane technology was proposed to concentrate these fractions and obtain salt- and arsenic-free saccharidic fractions.Based on these technologies, this study presents a multipurpose process to obtain six different products with potential applications for nutraceutical, cosmetic and pharmaceutical industries.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas s/n, Ourense 32004, Spain. elenamba@uvigo.es.

ABSTRACT
The biorefinery concept integrates processes and technologies for an efficient biomass conversion using all components of a feedstock. Sargassum muticum is an invasive brown algae which could be regarded as a renewable resource susceptible of individual valorization of the constituent fractions into high added-value compounds. Microwave drying technology can be proposed before conventional ethanol extraction of algal biomass, and supercritical fluid extraction with CO2 was useful to extract fucoxanthin and for the fractionation of crude ethanol extracts. Hydrothermal processing is proposed to fractionate the algal biomass and to solubilize the fucoidan and phlorotannin fractions. Membrane technology was proposed to concentrate these fractions and obtain salt- and arsenic-free saccharidic fractions. Based on these technologies, this study presents a multipurpose process to obtain six different products with potential applications for nutraceutical, cosmetic and pharmaceutical industries.

No MeSH data available.