Microalgae-based solid biofuels offer a promising option for efficient and low-cost utilizations of microalgae. This work investigates the key aspects of microalgae-based solid fuels, from production to combustion, based on the perspective of microalgae's complete carbon cycle, from culture to utilization. Additionally, recent advances in research on the physical properties, energy consumption during production, and combustion characteristics of microalgae-based solid fuels were evaluated. The results show that microalgae is viewed as a promising feedstock for the production of solid fuels and constitutes a widely followed topic of research. Nowadays, co-pelletization and co-combustion of microalgae with other biomass is considered the most competitive way to utilize microalgae-based solid fuels. The addition of about 10–30% microalgae can reduce the energy consumption of the original pelletizing process by about 24–28%, while the density, durability and calorific value of the solid fuel can be significantly increased. More importantly, thanks to the high lipid content of microalgae, its addition can effectively improve the combustion performance of coal, sludge and typical biomass fuels, as well as positively influence the combustion process. Finally, the opportunities and challenges for microalgae-based solid biomass feedstock was discussed, including the impact of species diversity on algae-based solid fuels, an exploration of further industrial applications, and possible integration pathways with the existing microalgae industry chain.

基于微藻的固体生物燃料为高效、低成本地利用微藻提供了一种有前景的选择。本工作从微藻从培养到利用的完整碳循环视角，研究了微藻基固体燃料从生产到燃烧的关键环节。此外，评估了基于微藻的固体燃料的物理性质、生产过程中的能源消耗和燃烧特性的最新研究进展。结果表明，微藻被视为生产固体燃料的有前途的原料，并构成了广泛关注的研究课题。如今，微藻与其他生物质的共造粒和共燃被认为是利用微藻基固体燃料最具竞争力的方式。添加约10-30%的微藻，可使原造粒工艺能耗降低约24-28%，同时可显着提高固体燃料的密度、耐久性和热值。更重要的是，由于微藻脂质含量高，其添加可有效改善煤、污泥和典型生物质燃料的燃烧性能，并对燃烧过程产生积极影响。最后，讨论了基于微藻的固体生物质原料的机遇和挑战，包括物种多样性对基于藻的固体燃料的影响、进一步的工业应用探索以及与现有微藻产业链的可能整合途径。可以显着提高固体燃料的耐久性和热值。更重要的是，由于微藻脂质含量高，其添加可有效改善煤、污泥和典型生物质燃料的燃烧性能，并对燃烧过程产生积极影响。最后，讨论了基于微藻的固体生物质原料的机遇和挑战，包括物种多样性对基于藻的固体燃料的影响、进一步的工业应用探索以及与现有微藻产业链的可能整合途径。可以显着提高固体燃料的耐久性和热值。更重要的是，由于微藻脂质含量高，其添加可有效改善煤、污泥和典型生物质燃料的燃烧性能，并对燃烧过程产生积极影响。最后，讨论了基于微藻的固体生物质原料的机遇和挑战，包括物种多样性对基于藻的固体燃料的影响、进一步的工业应用探索以及与现有微藻产业链的可能整合途径。污泥和典型的生物质燃料，以及对燃烧过程产生积极影响。最后，讨论了基于微藻的固体生物质原料的机遇和挑战，包括物种多样性对基于藻的固体燃料的影响、进一步的工业应用探索以及与现有微藻产业链的可能整合途径。污泥和典型的生物质燃料，以及对燃烧过程产生积极影响。最后，讨论了基于微藻的固体生物质原料的机遇和挑战，包括物种多样性对基于藻的固体燃料的影响、进一步的工业应用探索以及与现有微藻产业链的可能整合途径。