Comparative environmental life cycle assessment of two seaweed cultivation systems in North West Europe with a focus on quantifying sea surface occupation

Taelman, Sue Ellen; Champenois, Jennifer; Edwards, Maeve D.; Meester, Steven De; Dewulf, Jo

doi:10.1016/j.algal.2015.06.018

Cited by 63 publications

(35 citation statements)

References 26 publications

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“…The Irish government aims to position Ireland as 'The Green Food Island' and develop the annual value of Irish seaweed sector to €30 million by 2020 (Dring et al 2013). The ten species under study grow prolifically, farmed and wild, around the Irish coast and can be harvested without damage to the base, allowing for continuous regrowth (Taelman et al 2015). Irish brown seaweeds, particularly A. esculenta, F. vesiculosus, and L. digitata represent a potential source of fucoxanthin for nutraceutical applications.…”

Section: Discussionmentioning

confidence: 99%

Optimisation of fucoxanthin extraction from Irish seaweeds by response surface methodology

Shannon¹,

Abu‐Ghannam²

2016

J Appl Phycol

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Fucoxanthin is a xanthophyll pigment which occurs in marine brown algae (Phaeophyceae). The anti-diabetic, anti-obesity, anti-cancer, and antioxidant properties of fucoxanthin have been widely reported. Macroalgae, particularly brown seaweeds, grow prolifically around Irish coasts, representing a valuable resource of nutraceuticals such as fucoxanthin for functional food applications. The aim of this study was to maximise the solvent extraction yield from three anatomically discrete regions of the seaweed thallus: blade, stipe, and holdfast. Response surface methodology was applied to determine optimum parameters for extraction of fucoxanthin from the seaweed, Fucus vesiculosus, as a model species. A central composite design was applied with four extraction variables: time (30-70 min), temperature (30-70°C), solvent pH (5.0-9.0), and percentage acetone (30-70 %). Fucoxanthin content of extracts was quantified by highperformance liquid chromatography. Percentage acetone was found to have the most significant (P = 0.0002) effect on fucoxanthin yield, followed by pH (P = 0.028) and temperature (P = 0.049). Multiple response optimisation determined that fucoxanthin yield from F. vesiculosus may be maximised by incubating at 30.0°C for 36.5 min, pH 5.7, with 62.2 % acetone. Optimised responses were applied to a further nine brown seaweeds; Alaria esculenta, Ascophyllum nodosum, Fucus serratus, Himanthalia elongata, Laminaria digitata, Laminaria hyperborea, Pelvetia canaliculata, Saccharina latissima, and Saccorhiza polyschides. In all species, the blades contained significantly more fucoxanthin than stipes, while holdfasts contained the least. Alaria esculenta blade had the greatest yield (0.870 mg g −1 dry mass), followed by ).

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Section: Discussionmentioning

confidence: 99%

Optimisation of fucoxanthin extraction from Irish seaweeds by response surface methodology

Shannon¹,

Abu‐Ghannam²

2016

J Appl Phycol

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“…Laminaria, Undaria, Porphyra, Gracilaria, Eucheuma and Kappaphycus species all have annual production of more than one million wet tonnes for non‐fuel use . The main species cultivated in Europe are S. latissima and U. pinnatifida …”

Section: Cultivationmentioning

confidence: 99%

“…Trial cultivation of Laminaria hyperborea, L.digitata, S. polyschides and S. latissimi have all been attempted in Ireland or Scotland . The recent EnAlgae project, examining the cultivation of seaweed for biofuels, has focused much of its research on the growth S. latissima in both France and Ireland …”

Section: Cultivationmentioning

confidence: 99%

“…Juvenile macroalgal cultivation can be divided into two categories: sexual propagation starting from microscopic haploid spores; vegetative propagation starting from macroscopic diploid algal fragments. …”

Section: Cultivationmentioning

confidence: 99%

“…17 The main species cultivated in Europe are S. latissima and U. pinnatifida. 27 A number of species of seaweed are currently exploited on a relatively small scale in the British Isle compared with that in Asia. Table 1 gives a list of the seaweed species exploited in Ireland and estimates of their annual harvest.…”

Section: Species Selectionmentioning

confidence: 99%

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Potential process ‘hurdles’ in the use of macroalgae as feedstock for biofuel production in the British Isles

Milledge

Harvey

2016

J. Chem. Technol. Biotechnol.

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This review examines the potential technical and energy balance hurdles in the production of seaweed biofuel, and in particular for the MacroBioCrude processing pipeline for the sustainable manufacture of liquid hydrocarbon fuels from seaweed in the UK.The production of biofuel from seaweed is economically, energetically and technically challenging at scale. Any successful process appears to require both a method of preserving the seaweed for continuous feedstock availability and a method exploiting the entire biomass. Ensiling and gasification offer a potential solution to these two requirements. However there is need for more data particularly at a commercial scale. © 2016 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Opportunity and challenge of seaweed bioethanol based on life cycle CO₂ assessment

Jung

Lim

Kim

et al. 2016

Env Prog and Sustain Energy

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Seaweed bioethanol technology is being developed to mitigate climate change and to overcome economic and environmental drawbacks that terrestrial bioethanol has: biomass demand competition for food and energy, and land‐use change impacts. To investigate whether seaweed bioethanol is better than terrestrial bioethanol, we compare the global warming potentials (GWPs) of seaweed and terrestrial bioethanols from a life cycle perspective including land‐related GWP effects from carbon debt, soil carbon sequestration, and N2O emission. Our results demonstrated that seaweed bioethanol has lower GWP in the long term than terrestrial bioethanols from corn grain, corn stover, and switchgrass, primarily because seaweed cultivation does not consume fertilizers and incur carbon debt and N2O emission. It was noted that future R&D strategy for low‐carbon seaweed bioethanol needs to be directed to developing biomaterial‐based cultivation equipment and reusing existing equipment, as well as enhancing bioethanol conversion yield and biomass productivity. Due to the vast sea available for seaweed cultivation, seaweed bioethanol could significantly contribute to mitigating climate change. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 200–207, 2017

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Comparative environmental life cycle assessment of two seaweed cultivation systems in North West Europe with a focus on quantifying sea surface occupation

Cited by 63 publications

References 26 publications

Optimisation of fucoxanthin extraction from Irish seaweeds by response surface methodology

Optimisation of fucoxanthin extraction from Irish seaweeds by response surface methodology

Potential process ‘hurdles’ in the use of macroalgae as feedstock for biofuel production in the British Isles

Opportunity and challenge of seaweed bioethanol based on life cycle CO₂ assessment

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Comparative environmental life cycle assessment of two seaweed cultivation systems in North West Europe with a focus on quantifying sea surface occupation

Cited by 63 publications

References 26 publications

Optimisation of fucoxanthin extraction from Irish seaweeds by response surface methodology

Optimisation of fucoxanthin extraction from Irish seaweeds by response surface methodology

Potential process ‘hurdles’ in the use of macroalgae as feedstock for biofuel production in the British Isles

Opportunity and challenge of seaweed bioethanol based on life cycle CO2 assessment

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Product

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Opportunity and challenge of seaweed bioethanol based on life cycle CO₂ assessment