Journal
ENVIRONMENTAL CHEMISTRY LETTERS
Volume 21, Issue 1, Pages 97-152Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10311-022-01520-y
Keywords
Seaweeds; Seaweed biogas; Seaweed biochar; Seaweed food; Climate change mitigations; Seaweeds cosmetics; Seaweeds pharmaceuticals; Biorefineries
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The development and recycling of biomass production can partially address issues related to energy, climate change, food and feed shortages, and environmental pollution. Seaweeds, for example, have the potential to reduce our reliance on fossil fuels, produce cost-effective and eco-friendly products and biofuels, and contribute to sustainable biorefinery processes.
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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