Coelho Fernando Pinto, Sampaio Everardo Valadares de Sá Barreto, Barboza Márcio Gomes, Guedes-Coelho Elica Amara Cecília, Costa Manoel Messias da Silva, Silva Emerson Carlos Soares da, Carneiro Victor Andrei Rodrigues, Soares Bruno Moreira, França Elvis Joacir de, Menezes Rômulo Simões Cezar, Abreu Cesar Augusto Moraes de
Postgraduate Program in Energy and Nuclear Technologies, Federal University of Pernambuco (UFPE/PROTEN), National Nuclear Energy Commission, Recife 50740-540, Brazil.
Research Nucleus in Energy Production, National Council for Scientific Research CNPQ, Brasília 70070-010, Brazil.
Plants (Basel). 2025 Mar 23;14(7):1005. doi: 10.3390/plants14071005.
Some stretches of the Brazilian coast are regularly subject to a natural process of macroalgae deposition. In urban beach areas, public institutions responsible for cleaning collect this biomass and dispose of it in landfills. When this biomass is exposed to the sun for a long time in the littoral area, a decomposition process begins and causes greenhouse gas emission into the atmosphere. Macroalgae biomass is a natural resource that could be used for renewable energy, contributing to meeting the growing demand for low environmental impacts of energy, indicating the possibility of participating in sustainable development. The objective of this research was to evaluate the energetic potential of macroalgae biomass deposited on the Maceió coast; specifically, the combustion capacity of aggregate biomass and pellet biofuel produced with macroalgae. The research, which analysed 13 species, proceeded using a calorimetric pump methodology to determine the power heating value and a mass spectrophotometer to determine the available energetic chemical elements. The result of 8.82 MJ/Kg was similar to the main biomass used in Brazil, the sugarcane bagasse, evaluated at 8.91 MJ/Kg. Aggregated macroalgae biomass in condensed pellets with energetic composites obtained a value of 4823 Kcal/Kg, 1.2% more than the average of terrestrial biomass pellets. Therefore, these results show possibilities to produce biofuel using thermal energy from marine macroalgae biomass.
巴西海岸的一些区域经常会经历大型海藻沉积的自然过程。在城市海滩区域，负责清洁工作的公共机构会收集这些生物质，并将其运往垃圾填埋场处理。当这些生物质在沿海地区长时间暴露于阳光下时，分解过程就会开始，并导致温室气体排放到大气中。大型海藻生物质是一种自然资源，可用于可再生能源，有助于满足对低环境影响能源日益增长的需求，这表明其具有参与可持续发展的可能性。本研究的目的是评估沉积在马塞约海岸的大型海藻生物质的能源潜力；具体而言，是评估大型海藻产生的聚合生物质和颗粒生物燃料的燃烧能力。该研究分析了13个物种，采用量热泵方法来确定功率热值，并使用质谱仪来确定可用的能源化学元素。8.82兆焦/千克的结果与巴西主要使用的生物质甘蔗渣相似，甘蔗渣的评估值为8.91兆焦/千克。含有能量复合材料的压缩颗粒中的聚合大型海藻生物质的值为4823千卡/千克，比陆地生物质颗粒的平均值高1.2%。因此，这些结果表明利用海洋大型海藻生物质的热能生产生物燃料具有可能性。
