Blue growth and bioextraction potentials of Danish Saccharina latissima aquaculture — A model of eco-industrial production systems mitigating marine eutrophication and climate change

Zhang, Xueqian; Boderskov, Teis; Bruhn, Annette; Thomsen, Marianne

doi:10.1016/j.algal.2022.102686

Cited by 16 publications

(33 citation statements)

References 54 publications

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“…The climate impact of the various VOCs is not yet fully understood (Tokarek et al, 2019). Also the C invested in the production and processing of the seaweed needs to be accounted for, and hence a full life cycle analysis approach is necessary for estimating the true carbon footprint of S. latissima cultivation (Zhang et al, 2022).…”

Section: Nutrient Extraction and Carbon Uptake Potentialsmentioning

confidence: 99%

“…has been calculated to remove an average of 8.59 t C ha -1 y -1 corresponding to 31.53 t CO 2 ha -1 y -1 (Zheng et al, 2019). Recent cultivation trials of S. latissima in Danish waters have documented a C extraction equivalent to 2.40 t CO 2 ha -1 y -1 , and an overall carbon negative production during a 10 year production period in a full lifecycle analysis of the production (Zhang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Upscaling cultivation of Saccharina latissima on net or line systems; comparing biomass yields and nutrient extraction potentials

2023

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Production of sugar kelp, Saccharina latissima, has the potential of extracting nutrients and carbon from the seawater and returning it to land as a bioresource. The production thereby acts as an emission capture and utilization instrument contributing to mitigation of eutrophication and climate change. To achieve higher biomass yields improving the effects on climate and environment, and the economic feasibility of the production, cultivation techniques need to be optimized. In Denmark so far, S. latissima production yields have been lower than yields documented from Norway and the Faroe Islands. Use of alternative cultivation infrastructure designs with a higher line density per area, and better understanding the effects of annual and seasonal variations in abiotic parameters on growth, could lead the way towards a future higher yield of the S. latissima production. In this study, S. latissima was cultivated in a Danish commercial scale cultivation site for two consecutive seasons comparing the yields of different cultivation techniques: cultivation on nets and a multi-layer single line system, while also testing the possibility of coppicing the blades instead of applying a full harvest. Biomass yields of 5.0 - 6.8 kg FW m-1 cultivation line year-1, and 10.9 – 30.4 kg FW m-2 net structure were achieved. Biomass production, nutrient and carbon extraction potentials up to 91.3 t FW, 110 kg N, 13.1 kg P and 5.1 t C ha-1 were obtained using net cultivation systems and a 1.5 years growth period. Depth of cultivation had a significant effect on yield, but no effect on dry matter, C, N or P contents of S. latissima in a multi-layered line system. Biomass yields from the same system and site varied with a factor of four between years. The use of coppicing enabled multiple harvests of S. latissima, providing however biomass of reduced quality in the second year. This study demonstrates that the production yield of S. latissima can be increased by optimizing cultivation infrastructure, and indicates that net systems, or other cultivation systems with a high line density in the upper water column, can be a means to increase the areal yield of S. latissima.

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Section: Nutrient Extraction and Carbon Uptake Potentialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Upscaling cultivation of Saccharina latissima on net or line systems; comparing biomass yields and nutrient extraction potentials

2023

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“…For 4 out the of 5 studies the hatchery-related costs are included in their total output, with the exception of study in Sweden (Hasselström et al, 2020), which does not specify the inclusion of this cost in the production total. Zhang et al (2022) includes licences for cultivation, supplementing their study with very price list of all material needed. Only the Faroe Islands case included those costs in the calculations (Bak at al., 2020), Watson and Dring (2011) and Zhang et al (2022) do not include processing and Hasselström et al (2020) do not give further information if it was included or not.…”

Section: Small-scale Cultivationmentioning

confidence: 99%

“…Zhang et al (2022) includes licences for cultivation, supplementing their study with very price list of all material needed. Only the Faroe Islands case included those costs in the calculations (Bak at al., 2020), Watson and Dring (2011) and Zhang et al (2022) do not include processing and Hasselström et al (2020) do not give further information if it was included or not.…”

Section: Small-scale Cultivationmentioning

confidence: 99%

“…The farms described in Ireland and Denmark (Collins et al, 2022;Zhang et al, 2022) specify that boats were rented and the costs were included, in the Faroe Islands case (Bak et al, 2020) it is not mentioned whether the boat is rented or owned but the hourly costs of the boat operation are defined. Another step in the value chain is the drying process, a labour and energy-intensive step which therefore significantly impacts total costs (Seghetta and Goglio, 2020;van Oirschot et al, 2017).…”

Section: Small-scale Cultivationmentioning

confidence: 99%

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The business case for seaweed aquaculture in the North Sea : Learning from international experiences

Ciravegna¹,

Koch²,

Burg³

2023

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The sugar kelp Saccharina latissima II: Recent advances in farming and applications

Sæther,

Diehl,

Monteiro

et al. 2024

J Appl Phycol

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The sugar kelp Saccharina latissima has received intense scientific attention over the last decades. In recent years, interest in cultivation of the species has strongly increased in the North Atlantic Ocean and the Eastern Pacific Ocean, driven by the great potential of S. latissima to be utilised for various industrial applications, including food, feed, and biomaterials. Accordingly, current research has focused on improving farming methods and technology, environmental impacts, and site selection. In addition, many studies have investigated the varying chemical composition of S. latissima, extraction of commercially interesting components, and the use of the biomass and its derived components in various applications. This review provides a comprehensive overview of farming and applications of S. latissima from the last 15 years. Additional insights on other research topics, such as ecology, physiology, biochemical and molecular biology of S. latissima, are given in the first review, “The sugar kelp Saccharina latissima I: recent advances in a changing climate” (Diehl et al. 2023).

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Blue growth and bioextraction potentials of Danish Saccharina latissima aquaculture — A model of eco-industrial production systems mitigating marine eutrophication and climate change

Cited by 16 publications

References 54 publications

Upscaling cultivation of Saccharina latissima on net or line systems; comparing biomass yields and nutrient extraction potentials

Upscaling cultivation of Saccharina latissima on net or line systems; comparing biomass yields and nutrient extraction potentials

The business case for seaweed aquaculture in the North Sea : Learning from international experiences

The sugar kelp Saccharina latissima II: Recent advances in farming and applications

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