Seasonal variation of elements composition and biomethane in brown macroalgae

Ometto, Francesco; Steinhovden, Kristine; Kuci, Hana; Lunnbäck, Johan; Berg, A.J. van den; Karlsson, Anna; Handå, Aleksander; Wollan, Håvard; Ejlertsson, Jörgen

doi:10.1016/j.biombioe.2017.11.006

Cited by 43 publications

(28 citation statements)

References 20 publications

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“…The total biogas obtained from the anaerobic digestion of S. latissima algal pulp without enzyme hydrolysis was 372 ± 22 mL per gVS. This is a similar biogas volume to previously observed values [20] [29] [30], but variation is expected due to seasonal and locational differences. Comparatively, the total biogas obtained from the anaerobic digestion of S. latissima S. latissima algal pulp with enzyme hydrolysis was 459 ± 30 mL per gVS (Figure 3; Table 4).…”

Section: Enzymatic Hydrolysis Of Polysaccharides From S Latissimasupporting

confidence: 89%

“…These were performed in triplicate with inoculum and processed samples, with inoculum alone as a control batch. The following was added as trace minerals and nutrients: 10 mM NH 4 Cl, 8 mM NaCl, 1 mM CaCl 2 •2H 2 O, 0.5 mM MgCl 2 •6H 2 O and 0.3 mM Na 2 S•3H 2 O, as previously described [20]. The final liquid volume of each experiment was 250 mL.…”

Section: Biomethane Potentialmentioning

confidence: 99%

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Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed <i>Saccharina latissima</i> and Its Industrial Potential

Lamb¹,

Hjelme²,

Lien³

2019

AiM

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The demand for fuel for utilisation of machinery and transport has culminated in large amounts of fossil fuel usage in the last century. The environmental dangers attached with the usage of fossil fuels have created a large demand for alternative sources of fuels. There is an array of polysaccharides contained within macroalgae, such as mannitol, cellulose and laminarin. These polysaccharides have potential for production of alternative biofuels; however, they are not easily accessible for biological digestion. By pretreatment of macroalgae with enzymes, these polysaccharides may be easier to access by microbes, allowing effective utilization in anaerobic digestion. Saccharina latissima, available in abundance on the Norwegian coast line, is a brown macroalgae with a high level of carbohydrates. This study assesses the ability for utilisation of enzymatically pre-treated Saccharina latissima for production of biogas through anaerobic digestion. The harvested Saccharina latissima was analysed to contain 30.11 ± 2.30 g of reducing sugars per 100 g of dry sample upon enzymatic hydrolysis. This was able to yield 459 ± 30 mL per gVS of biogas through anaerobic digestion, with a methane content of 56%. This suggests a biomethane potential of 1760 m 3 per ha of productive sea floor growing Saccharina latissima. An evaluation of this process has been performed to demonstrate the industrial potential of Saccharina latissima in biogas production.

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Section: Enzymatic Hydrolysis Of Polysaccharides From S Latissimasupporting

confidence: 89%

Section: Biomethane Potentialmentioning

confidence: 99%

Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed <i>Saccharina latissima</i> and Its Industrial Potential

Lamb¹,

Hjelme²,

Lien³

2019

AiM

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“…There was no correlation between sulphur content and MP (Coefficient of Correlation, 0.061), and the ratio of C:S is considerable above ≥40:1 recommended to reduce the problem of AD inhibition by H 2 S [138]. Iron is often used to precipitate sulphur in AD, and a molar ratio of Fe:S ≥ 1 is generally recommended to reduce the problem of sulphur-rich substrates [144,145]. The molar ratio of iron to sulphur was above one for all the samples except S. natans VIII, which had the highest MP.…”

Section: Methane Potential Of S Natans VIII S Natans I S Fluitanmentioning

confidence: 99%

Sargassum Inundations in Turks and Caicos: Methane Potential and Proximate, Ultimate, Lipid, Amino Acid, Metal and Metalloid Analyses

et al. 2020

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The Caribbean has been experiencing beach inundations of pelagic Sargassum, causing environmental, health and financial issues. This study showed variations in the composition and methane potential (MP) between the species of Sargassum. The MPs for S. natans VIII, S. natans I and S. fluitans (145, 66 and 113 mL CH4 g−1 Volatile Solids) were considerably below theoretical potentials, possibly due to the high levels of indigestible fibre and inhibitors. The mixed mats Sargassum composition was substantially different from the individual species, being higher in ash, calcium, iron, arsenic and phenolics. The mixed mats produced no methane, perhaps due to the high levels of phenolics. There was a strong correlation between MP and phenolic content. Heavy metals and metalloids were at levels that should not cause concern, except for arsenic (21–124 mg kg−1 dry weight). Further work on the speciation of arsenic in Sargassum is required to fully determine the risk to health and agriculture. Both protein and lipid levels were low. The ‘indispensable amino acid’ profile compares favourably with that recommended by the World Health Organisation. Lipids had a high proportion of Polyunsaturated Fatty Acids. The use of Sargassum for biogas production could be challenging, and further work is required.

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“…Atomic absorption spectroscopy (AAS) is a very trustful methodology and highly sensible for detecting elements but is also very time consuming for routine analysis since it requires the analyses of one element at a time. This technique is being replaced by others, mainly by inductively coupled plasma optical emission spectroscopy (ICP-OES) [ 32 , 33 , 34 ] and inductively coupled plasma mass spectrometry (ICP-MS) [ 35 , 36 , 37 ]. The former allows analysis of multiple elements at a time, but, as it lacks sensitivity to detect ultra-trace elements, it is only adequate for macro-elemental analysis.…”

Section: Accumulation Of Minerals By Macroalgaementioning

confidence: 99%

“…and Palmaria palmata , collected in Portugal and from an unknown location, as well as for the brown macroalgae, Laminaria spp. and Saccharina latissima , from Spain and Norway [ 32 , 44 , 45 , 46 ]. It is of relevance to note that comparable levels of Na (79 g/kg DW) have been reported for U. pinnatifida although this has been collected in Japan [ 47 ].…”

Section: Mineral Content Of Macroalgaementioning

confidence: 99%

Minerals from Macroalgae Origin: Health Benefits and Risks for Consumers

et al. 2018

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Seaweeds are well-known for their exceptional capacity to accumulate essential minerals and trace elements needed for human nutrition, although their levels are commonly very variable depending on their morphological features, environmental conditions, and geographic location. Despite this variability, accumulation of Mg, and especially Fe, seems to be prevalent in Chlorophyta, while Rhodophyta and Phaeophyta accumulate higher concentrations of Mn and I, respectively. Both red and brown seaweeds also tend to accumulate higher concentrations of Na, K, and Zn than green seaweeds. Their valuable mineral content grants them great potential for application in the food industry as new ingredients for the development of numerous functional food products. Indeed, many studies have already shown that seaweeds can be used as NaCl replacers in common foods while increasing their content in elements that are oftentimes deficient in European population. In turn, high concentrations of some elements, such as I, need to be carefully addressed when evaluating seaweed consumption, since excessive intake of this element was proven to have negative impacts on health. In this regard, studies point out that although very bioaccessible, I bioavailability seems to be low, contrarily to other elements, such as Na, K, and Fe. Another weakness of seaweed consumption is their capacity to accumulate several toxic metals, which can pose some health risks. Therefore, considering the current great expansion of seaweed consumption by the Western population, specific regulations on this subject should be laid down. This review presents an overview of the mineral content of prevalent edible European macroalgae, highlighting the main factors interfering in their accumulation. Furthermore, the impact of using these marine vegetables as functional ingredients or NaCl replacers in foods will be discussed. Finally, the relationship between macroalgae’s toxic metals content and the lack of European legislation to regulate them will be addressed.

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Seasonal variation of elements composition and biomethane in brown macroalgae

Cited by 43 publications

References 20 publications

Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed <i>Saccharina latissima</i> and Its Industrial Potential

Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed <i>Saccharina latissima</i> and Its Industrial Potential

Sargassum Inundations in Turks and Caicos: Methane Potential and Proximate, Ultimate, Lipid, Amino Acid, Metal and Metalloid Analyses

Minerals from Macroalgae Origin: Health Benefits and Risks for Consumers

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Seasonal variation of elements composition and biomethane in brown macroalgae

Cited by 43 publications

References 20 publications

Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed &lt;i&gt;Saccharina latissima&lt;/i&gt; and Its Industrial Potential

Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed &lt;i&gt;Saccharina latissima&lt;/i&gt; and Its Industrial Potential

Sargassum Inundations in Turks and Caicos: Methane Potential and Proximate, Ultimate, Lipid, Amino Acid, Metal and Metalloid Analyses

Minerals from Macroalgae Origin: Health Benefits and Risks for Consumers

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Product

Resources

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Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed <i>Saccharina latissima</i> and Its Industrial Potential

Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed <i>Saccharina latissima</i> and Its Industrial Potential