Marine macroalgae in a circular economy context: A comprehensive analysis focused on residual biomass

Pardilhó, Sara; Cotas, João; Pereira, Leonel; Oliveira, M.B.P.P.; Dias, Joana Maia

doi:10.1016/j.biotechadv.2022.107987

Cited by 49 publications

(37 citation statements)

References 138 publications

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“…The principal industrial use of marine macroalgal residues is related to the extraction and purification of the polysaccharide fraction, which can range between 4 and 76% dry weight, being the alginate in brown algae. The extraction of alginate in the industry based on marine algae residues is well examined, and following an adequate recovery route, compounds with a higher value and a lower production cost can be obtained [135]. A study by Fernando, et al [136] suggests extracting alginate from S. horneri to produce alginate microparticles for drug delivery.…”

Section: The Economic Aspect Of the Use Of Alginate In Agriculturementioning

confidence: 99%

Review and Perspectives of the Use of Alginate as a Polymer Matrix for Microorganisms Applied in Agro-Industry

et al. 2022

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Alginate is a polysaccharide with the property of forming hydrogels, which is economic production, zero toxicity, and biocompatibility. In the agro-industry, alginate is used as a super absorbent polymer, coating seeds, fruits, and vegetables and as a carrier of bacteria and fungi as plant-growth promoters and biocontrol. The latter has a high impact on agriculture since the implementation of microorganisms in a polymer matrix improves soil quality; plant nutrition, and is functional as a preventive measure for the appearance of phytopathogenic. Additionally, it minimizes losses of foods due to wrong post-harvest handling. In this review, we provide an overview of physicochemical properties of alginate, some methods for preparation and modification of capsules and coatings, to finally describe its application in agro-industry as a matrix of plant-growth-promoting microorganisms, its effectiveness in cultivation and post-harvest, and its effect on the environment, as well as the prospects for future agro-industrial applications.

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Section: The Economic Aspect Of the Use Of Alginate In Agriculturementioning

confidence: 99%

Review and Perspectives of the Use of Alginate as a Polymer Matrix for Microorganisms Applied in Agro-Industry

et al. 2022

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“…All of these are valuable compounds with recognized market applications, but these green extraction processes are still rather experimental, dependent on the desired products and have only been used in lab or pilot scales [219]. The residual biomass can also be used to produce energy and, the remaining solid fraction may be used as a fertilizer [220,221]. New extraction techniques are improving the cost-efficiency, sustainability, environmental and industrial-scale feasibility requirements to obtain algal components.…”

Section: Integrated Approaches and Future Perspectivesmentioning

confidence: 99%

The Red Seaweed Giant Gelidium (Gelidium corneum) for New Bio-Based Materials in a Circular Economy Framework

Mouga

Fernandes

2022

Earth

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Gelidium corneum (Giant Gelidium or Atlantic agar) is a well-known red seaweed harvested for its high-quality agar content. Agar is a mixture of the polysaccharides used in the food industry as a gelling, thickener, clarifying, and stabilizer agent. The best agar quality is also used in the laboratory as bacteriological agar. Yet, in recent years, the species has been studied for many other applications. Examples of uses are pharmaceuticals, cosmetics, food supplements, bioremediation, biofuels, biofertilizers and biostimulants, biomaterials, and nanocrystals, among others. The use of this biomass, though, raises concerns about the sustainability of the resource, since this is not a cultivated species, being harvested in the wild. Thus, other uses of G. corneum biomass increase pressure on wild stocks already stressed due to climate change. However, in a biorefinery approach, a new trend is emerging, using waste biomass rather than harvested biomass to produce new bio-based materials. These are smart solutions that transform waste into innovative products, useful for various sectors of society while reducing the impact of biomass exploitation. The aim of this review paper, thus, is to address the current state of G. corneum biology, ecology, threats, its current uses and market, and the ongoing research on innovative proposals in a circular economy framework.

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“…Seaweed has traditionally been used in animal nutrition in some parts of the world—as fodder during periods of scarcity and also as a mineral supplement [ 60 , 61 , 62 ]. However, the current interest in the use of algae in animal nutrition arises from the urgent need to search for new bioactive substances that can improve animal health and the sustainability of animal production [ 63 , 64 , 65 ].…”

Section: Seaweed and Gut Healthmentioning

confidence: 99%

“…grow uncontrollably on the coast and have some negative environmental impacts, leading to coastal degradation and problems for the fishing industry and tourism. Seaweed is removed regularly, thereby generating tons of marine macroalgal waste every year [ 62 , 69 ]. In addition, the seaweed industry also generates large amounts of waste during the transformation process.…”

Section: Seaweed and Sustainable Animal Farmingmentioning

confidence: 99%

“…This waste could be revalorized for inclusion in animal feed, among other uses, providing benefits both to animal health and the economic viability of industries. This approach would create a circular economy model that would be beneficial in environmental, economic, social and animal welfare terms ( Figure 4 ) [ 62 , 129 ].…”

Section: Seaweed and Sustainable Animal Farmingmentioning

confidence: 99%

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Marine Macroalgae in Rabbit Nutrition—A Valuable Feed in Sustainable Farming

Al-Soufi

García

Muíños³

et al. 2022

Animals

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The rabbit meat industry has faced critical challenges in the last few years, during which the ban on the prophylactic use of antibiotics in animal feed has added to the weakness of the production system and a decrease in consumption of rabbit meat. This review paper highlights the potential value of macroalgae in the rabbit farming sector as an alternative to the use of antibiotics to improve rabbit health. In line with sustainable agriculture programmes, the use of seaweed in rabbit nutrition may improve gut health according to the One Health approach, whereby consumers and the environment could receive tangible benefits. The inclusion of algae in animal feed has experimentally proven to help to reduce intestinal dysbiosis. However, further studies evaluating the prebiotic effects of algal components on gut health and also identifying the compounds directly responsible for the antimicrobial, antiviral, antioxidative and anti-inflammatory properties of algae are still needed. Furthermore, the inclusion of marine algae in rabbit food could potentially become a commercial marketing strategy that could attract new consumers who are concerned about environmental sustainability and who are looking for different, high-quality foods.

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Marine macroalgae in a circular economy context: A comprehensive analysis focused on residual biomass

Cited by 49 publications

References 138 publications

Review and Perspectives of the Use of Alginate as a Polymer Matrix for Microorganisms Applied in Agro-Industry

Review and Perspectives of the Use of Alginate as a Polymer Matrix for Microorganisms Applied in Agro-Industry

The Red Seaweed Giant Gelidium (Gelidium corneum) for New Bio-Based Materials in a Circular Economy Framework

Marine Macroalgae in Rabbit Nutrition—A Valuable Feed in Sustainable Farming

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