Green processes and sustainability: An overview on the extraction of high added-value products from seaweeds and microalgae

Herrero, Miguel; Ibáñez, Elena

doi:10.1016/j.supflu.2014.09.006

Cited by 88 publications

(50 citation statements)

References 28 publications

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“…A stepwise approach to maximizing the benefits from seaweed aquaculture would include to sequentially extract high-value molecules used in the food, pharma or biotech industries, such as bioactive sulphated polysaccharides, pigments, and antioxidants (D'Orazio et al, 2012;Mak et al, 2014;Herrero and Ibáñez, 2015), and then convert-after extraction of carbohydrates for the hydrocollid industry or for biofuels production-the lowervalue residue to protein concentrates with value in the feed industry (Francavilla et al, 2015;Bikker et al, 2016;Seghetta et al, 2016). Algal biorefineries have evolved from concept and laboratory tests to pilot-scale plants involving a range of seaweed species and environments (e.g., Baghel et al, 2014;Lorbeer et al, 2015;Bikker et al, 2016;Masarin et al, 2016), and may soon become commercial operations.…”

Section: Global Seaweed Production and The Associated Co 2 Uptakementioning

confidence: 99%

Can Seaweed Farming Play a Role in Climate Change Mitigation and Adaptation?

et al. 2017

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Seaweed aquaculture, the fastest-growing component of global food production, offers a slate of opportunities to mitigate, and adapt to climate change. Seaweed farms release carbon that maybe buried in sediments or exported to the deep sea, therefore acting as a CO 2 sink. The crop can also be used, in total or in part, for biofuel production, with a potential CO 2 mitigation capacity, in terms of avoided emissions from fossil fuels, of about 1,500 tons CO 2 km −2 year −1 . Seaweed aquaculture can also help reduce the emissions from agriculture, by improving soil quality substituting synthetic fertilizer and when included in cattle fed, lowering methane emissions from cattle. Seaweed aquaculture contributes to climate change adaptation by damping wave energy and protecting shorelines, and by elevating pH and supplying oxygen to the waters, thereby locally reducing the effects of ocean acidification and de-oxygenation. The scope to expand seaweed aquaculture is, however, limited by the availability of suitable areas and competition for suitable areas with other uses, engineering systems capable of coping with rough conditions offshore, and increasing market demand for seaweed products, among other factors. Despite these limitations, seaweed farming practices can be optimized to maximize climate benefits, which may, if economically compensated, improve the income of seaweed farmers.

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Section: Global Seaweed Production and The Associated Co 2 Uptakementioning

confidence: 99%

Can Seaweed Farming Play a Role in Climate Change Mitigation and Adaptation?

et al. 2017

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“…14 | julio-diciembre 2015 6. Los requerimientos energéticos serán catalogados por su impacto medioambiental y económico, reduciéndose todo lo posible.…”

Section: Química Verdeunclassified

“…De hecho uno de los grandes desafíos de la sociedad es dar respuesta a este asunto vital que es la sostenibilidad, la cual puede ser entendida como una forma racional de mejorar los procesos para maximizar la producción mientras se minimiza el impacto ambiental [6]. Tabla 1.…”

Section: Introductionunclassified

Recent progress in synthesis, properties and potential applications of SiC nanomaterials

Zhou

Yue

et al. 2015

Progress in Materials Science

471

217

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“…Nowadays, the constant search for sustainable economic development demands the rational use of resources and energy, including investment on renewable materials and greener processes [1]. In the electrical sector, this reality requires increasing the efficiency and safety in the generation and distribution of electricity.…”

Section: Introductionmentioning

confidence: 99%

Development of a New Bio-Based Insulating Fluid from <i>Jatropha curcas</i> Oil for Power Transformers

Evangelista¹,

Coelho²,

Carvalho³

et al. 2017

ACES

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The present work aims to develop a new vegetable insulating fluid for power transformers based on Jatropha curcas oil. Besides its technical benefits, Jatropha curcas oil has a socioeconomic role by promoting income to rural families, contributing to the countryside development and avoiding rural exodus. Thus, the entire transformer oil production (extraction, processing, characterization and accelerated aging) was covered and a new process was developed. For oil extraction, the most suitable process was the solvent extraction (5 mL of hexane per gram of crushed non-peeled seeds during 30 minutes) with an oil yield of 32%. In raw oil processing stage, the degumming, with 0.4 g of phosphoric acid per 100 g of oil, at 70˚C, was used to remove phosphatides. Then, free fatty acids were 96% neutralized with a sodium hydroxide solution (0.5% w/w) at room temperature. For the oil clarification, the combination of 5% w/w oil of activated carbon and 1% w/w oil of MgO resulted in a bright, odorless and clear oil with an acid number of 0.04 mg KOH •g −1 . The oil drying in a vacuum rotary evaporator, at 70˚C, for 2 hours reduced the water content to 177 ppm. The processed oil was characterized following ASTM D6871 methods. This oil presented higher dielectric breakdown voltage (55 kV) than commercial transformer fluids (BIOTEMP®, EnvirotempFR3®, and Bivolt®), which increases transformer safety, capacity and lifetime. In addition, the processed oil has a lower viscosity than BIOTEMP® fluid, which can enhance the heat dissipation efficiency in the transformer. Moreover, the processed oil flash and fire points of 310˚C and >340˚C, respectively, confirm the great security of vegetable insulating fluids. The analyzed properties of the processed oil fulfill all the ASTM D6871, ABNT NBR 15422 and IEC 62770 specifications. Therefore, Jatropha curcas oil is a potential substitute formineral insulating fluids.How to cite this paper: Evangelista Jr.,

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Green processes and sustainability: An overview on the extraction of high added-value products from seaweeds and microalgae

Cited by 88 publications

References 28 publications

Can Seaweed Farming Play a Role in Climate Change Mitigation and Adaptation?

Can Seaweed Farming Play a Role in Climate Change Mitigation and Adaptation?

Recent progress in synthesis, properties and potential applications of SiC nanomaterials

Development of a New Bio-Based Insulating Fluid from <i>Jatropha curcas</i> Oil for Power Transformers

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Green processes and sustainability: An overview on the extraction of high added-value products from seaweeds and microalgae

Cited by 88 publications

References 28 publications

Can Seaweed Farming Play a Role in Climate Change Mitigation and Adaptation?

Can Seaweed Farming Play a Role in Climate Change Mitigation and Adaptation?

Recent progress in synthesis, properties and potential applications of SiC nanomaterials

Development of a New Bio-Based Insulating Fluid from &lt;i&gt;Jatropha curcas&lt;/i&gt; Oil for Power Transformers

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Product

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Development of a New Bio-Based Insulating Fluid from <i>Jatropha curcas</i> Oil for Power Transformers