Techno-economic and environmental assessment of novel biorefinery designs for sequential extraction of high-value biomolecules from brown macroalgae Laminaria digitata, Fucus vesiculosus, and Saccharina latissima

Zhang, Xueqian; Thomsen, Marianne

doi:10.1016/j.algal.2021.102499

Cited by 33 publications

(13 citation statements)

References 43 publications

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“…Saccharina latissima belongs to the order Laminariales, more commonly known as kelps, and they are among the largest organisms on earth, reaching sizes of over 30 m. Saccharina sp. is a large seaweed used for many applications such as food and feed, and its polysaccharides are extracted for use in the agricultural, pharmacological and cosmetic industries worldwide 12,13 . Its cultivation, mainly in Asia and more recently in Europe, requires the preparation of embryos in hatcheries before releasing juveniles in the open sea.…”

Section: Introductionmentioning

confidence: 99%

Targeted Laser Ablation in the Embryo of <em>Saccharina latissima</em>

Boscq

Dutertre

Théodorou

et al. 2022

JoVE

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Section: Introductionmentioning

confidence: 99%

Targeted Laser Ablation in the Embryo of <em>Saccharina latissima</em>

Boscq

Dutertre

Théodorou

et al. 2022

JoVE

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“…Combined production methods or sequential extraction were also mentioned by some experts as another opportunity for bioplastics. Other high‐value compounds would be used for other purposes and the alginate for bioplastic (Zhang & Thomsen, 2021). In this case, the seaweed would be cultivated to capture carbon and nitrogen and the seaweed is not harvested as frequently as when targeted for use in human consumption.…”

Section: Resultsmentioning

confidence: 99%

Using quantitative storytelling to identify constraints in resource supply: The case of brown seaweed

Ayala,

Thomsen,

Pizzol

2023

J of Industrial Ecology

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Seaweed is increasingly considered a promising resource to produce high‐value products such as bioplastics due to potential environmental benefits such as carbon uptake and no land‐use change. However, the environmental assessment of emerging technologies for producing bioplastic from seaweed remains challenging due to the difficulties in modeling future seaweed supply and demand. Within the consequential approach to life cycle assessment, an increase in demand for seaweed is met by the marginal suppliers in the market: those that are not constrained in their capacity to increase supply in response to an increase in demand. Current methods to identify marginal suppliers are however based on quantitative information and do not consider qualitative aspects and uncertainties inherent in the study of emerging technologies. This study, therefore, proposes and tests the use of quantitative storytelling to identify marginal suppliers. The results show that there are two main groups of countries that are expected to be the marginal suppliers of brown seaweed for different reasons. Asian countries are currently the main brown seaweed suppliers and are expected to keep increasing and be marginal suppliers in the future. However, these countries have well‐established brown seaweed aquaculture and their growth is expected to be steady. On the other hand, brown seaweed suppliers in Northern Europe and North America are still emerging but are expected to grow faster in the future due to their production capacity and technological development.

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“…Taking kelp as an example, kelp cultivation can sequester 4 Gt CO 2 with the production of 2.34 ×10 10 tonnes/year, given a carbon content of 28% (Gao, Gao, et al, 2022). With a current kelp price of ~$11 kg −1 (dry weight), this can potentially yield $ 2.57 × 10 14 year −1 (Zhang & Thomsen, 2021). However, such costings are approximate as the price is likely to decrease with any increase of production.…”

Section: Analysis and Discussionmentioning

confidence: 99%

A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene

Gao

Beardall

Jin

et al. 2022

Journal of Applied Ecology

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1. The atmospheric concentration of CO 2 is steadily increasing and causing climate change. To achieve the Paris 1.5 or 2°C target, negative emission technologies must be deployed in addition to reducing carbon emissions. The ocean is a large carbon sink but the potential of marine primary producers to contribute to carbon neutrality remains unclear.2. Here we review the alterations to carbon capture and sequestration of marine primary producers (including traditional 'blue carbon' plants, microalgae and macroalgae) in the Anthropocene, and, for the first time, assess and compare the potential of various marine primary producers to carbon neutrality and climate change mitigation via biogeoengineering approaches.3. The contributions of marine primary producers to carbon sequestration have been decreasing in the Anthropocene due to the decrease in biomass driven by direct anthropogenic activities and climate change. The potential of blue carbon plants (mangroves, saltmarshes and seagrasses) is limited by the available areas for their revegetation. Microalgae appear to have a large potential due to their ubiquity but how to enhance their carbon sequestration efficiency is very complex and uncertain. On the other hand, macroalgae can play an essential role in mitigating climate change through extensive offshore cultivation due to higher carbon sequestration capacity and substantial available areas. This approach seems both technically and economically feasible due to the development of offshore aquaculture and a well-established market for macroalgal products. Synthesis and applications.This paper provides new insights and suggests promising directions for utilizing marine primary producers to achieve the Paris temperature target. We propose that macroalgae cultivation can play an essential role in attaining carbon neutrality and climate change mitigation, although its ecological impacts need to be assessed further.

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Techno-economic and environmental assessment of novel biorefinery designs for sequential extraction of high-value biomolecules from brown macroalgae Laminaria digitata, Fucus vesiculosus, and Saccharina latissima

Cited by 33 publications

References 43 publications

Targeted Laser Ablation in the Embryo of <em>Saccharina latissima</em>

Targeted Laser Ablation in the Embryo of <em>Saccharina latissima</em>

Using quantitative storytelling to identify constraints in resource supply: The case of brown seaweed

A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene

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