Efficient utilization and management of seaweed biomass for biogas production

Thakur, Nandini; Salama, El-Sayed; Sharma, Monika; Sharma, Pramodita; Sharma, D. C.; Li, Xiangkai

doi:10.1016/j.mtsust.2022.100120

Cited by 18 publications

(18 citation statements)

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“…Thermochemical conversion and fermentation are energy-intensive processes that necessitate dehydration and dewatering (Wang et al 2020a ). However, by utilising seaweed for biogas production, all seaweed components, including carbohydrates, lipids, and protein, can be utilised without dehydration, thereby avoiding energy need (Thakur et al 2022 ). Due to seaweed’s inexpensive polysaccharides and low lignin content, seaweed is promising biomass for the anaerobic digestion (Farghali et al 2021 ).…”

Section: Seaweed As a Feedstock For The Anaerobic Digestion Processmentioning

confidence: 99%

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

et al. 2022

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The development and recycling of biomass production can partly solve issues of energy, climate change, population growth, food and feed shortages, and environmental pollution. For instance, the use of seaweeds as feedstocks can reduce our reliance on fossil fuel resources, ensure the synthesis of cost-effective and eco-friendly products and biofuels, and develop sustainable biorefinery processes. Nonetheless, seaweeds use in several biorefineries is still in the infancy stage compared to terrestrial plants-based lignocellulosic biomass. Therefore, here we review seaweed biorefineries with focus on seaweed production, economical benefits, and seaweed use as feedstock for anaerobic digestion, biochar, bioplastics, crop health, food, livestock feed, pharmaceuticals and cosmetics. Globally, seaweeds could sequester between 61 and 268 megatonnes of carbon per year, with an average of 173 megatonnes. Nearly 90% of carbon is sequestered by exporting biomass to deep water, while the remaining 10% is buried in coastal sediments. 500 gigatonnes of seaweeds could replace nearly 40% of the current soy protein production. Seaweeds contain valuable bioactive molecules that could be applied as antimicrobial, antioxidant, antiviral, antifungal, anticancer, contraceptive, anti-inflammatory, anti-coagulants, and in other cosmetics and skincare products.

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Section: Seaweed As a Feedstock For The Anaerobic Digestion Processmentioning

confidence: 99%

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

et al. 2022

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“…Furthermore, waste biomass from the agar industry could be used alternatively to harvested/cultivated biomass to produce bioethanol, because, as stated earlier, the polysaccharides remain largely intact in the waste biomass. Another method to convert seaweed biomass into biofuels is anaerobic digestion producing biogas (methane) [28]. Likewise, the thermochemical conversion, using different temperatures and concentrations of oxygen produces biogas through gasification, biochar through pyrolysis, and bio-oils through liquefaction, which are alternative interesting energy sources [208].…”

Section: Seaweeds For Biofuelsmentioning

confidence: 99%

“…Although the production of bioethanol has been tested with Gelidium, this constitutes a challenging step when it comes to seaweeds, for each taxon presents specific polysaccharides, which must be hydrolysed into monosaccharides, not all fermentable into bioethanol, thus the optimization process is species-specific [215,216]. Gelidium has also been investigated as feedstock for anaerobic digestion to produce biogas (methane) [28,217] along with other seaweed species, with a direct relation between biomethane yield and high carbohydrate content. The anaerobic digestion, however, is influenced by several inhibitors that still need to be overcome, including the high molecular weight of organic compounds, which hampers cell wall disintegration during hydrolysis, among others [214,218].…”

Section: Integrated Approaches and Future Perspectivesmentioning

confidence: 99%

“…The chemical route includes, e.g., transesterification for high lipid content algae [28,219], which can be coupled with supercritical fluids such as water, CO 2, or alcohol to convert the lipids into biodiesel. After this transesterification process, the downstream process can further process the biomass to extract other valuable products.…”

Section: Integrated Approaches and Future Perspectivesmentioning

confidence: 99%

“…Seaweed extracts are also gaining research interest as a bioplastic product due to the nature of their polymers, producing resistant durable biofilms [25,26]. Another current approach is the use of seaweed waste biomass to produce biofuels (biogas, methane, or bioethanol) since this process does not increase the atmospheric net CO 2 [27,28]. First-generation biofuels are derived from vegetable oil, starch, or sucrose, usually derived from crops.…”

Section: Introductionmentioning

confidence: 99%

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The Red Seaweed Giant Gelidium (Gelidium corneum) for New Bio-Based Materials in a Circular Economy Framework

Mouga

Fernandes

2022

Earth

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Gelidium corneum (Giant Gelidium or Atlantic agar) is a well-known red seaweed harvested for its high-quality agar content. Agar is a mixture of the polysaccharides used in the food industry as a gelling, thickener, clarifying, and stabilizer agent. The best agar quality is also used in the laboratory as bacteriological agar. Yet, in recent years, the species has been studied for many other applications. Examples of uses are pharmaceuticals, cosmetics, food supplements, bioremediation, biofuels, biofertilizers and biostimulants, biomaterials, and nanocrystals, among others. The use of this biomass, though, raises concerns about the sustainability of the resource, since this is not a cultivated species, being harvested in the wild. Thus, other uses of G. corneum biomass increase pressure on wild stocks already stressed due to climate change. However, in a biorefinery approach, a new trend is emerging, using waste biomass rather than harvested biomass to produce new bio-based materials. These are smart solutions that transform waste into innovative products, useful for various sectors of society while reducing the impact of biomass exploitation. The aim of this review paper, thus, is to address the current state of G. corneum biology, ecology, threats, its current uses and market, and the ongoing research on innovative proposals in a circular economy framework.

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Utilization of macromolecules from macroalgal biomass: identification, characterization, and potential applications

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et al. 2023

Environ Dev Sustain

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Efficient utilization and management of seaweed biomass for biogas production

Cited by 18 publications

References 100 publications

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

The Red Seaweed Giant Gelidium (Gelidium corneum) for New Bio-Based Materials in a Circular Economy Framework

Utilization of macromolecules from macroalgal biomass: identification, characterization, and potential applications

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