微藻通过实现碳封存作为 CCUS 的一部分来帮助解决环境污染和气候变化,这为减少化石燃料依赖和减少排放提供了一个有前景的解决方案。本研究采用自养和异养方法相结合,以提高基于废物处理的生物柴油的效益。该研究表明,通过整合自养和异养生物柴油生产,可以在最大限度地固碳和减少排放的同时获得巨大的经济优势。结果表明,与传统光生物反应器相比,使用耦合异养方法生产 1 吨生物柴油的成本降低了 62.73%。此外,与相应的异养增殖相比,自养耦合异养增殖下生物柴油的碳排放分别减少了21.16%和24.08%。自养耦合异养增殖下生物柴油的总经济效益比异养增殖增加了2.12%和3.10%。但需要注意的是,由于微藻异养增殖造成的高碳排放,生物柴油并不能实现负碳排放。该研究为废弃物资源化利用和微藻生物能源生产阶段提供了新的发展策略。它将为利用微藻生物柴油实现全球碳中和提供理论和实践框架。
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Evaluation of microalgae biodiesel for carbon neutrality based on the waste treatment by the autotrophic and heterotrophic combination
Microalgae aid in addressing environmental pollution and climate change by enabling carbon sequestration as part of CCUS, which offers a promising solution to reduce fossil fuel dependence and mitigate emissions. This study uses the combination of autotrophic and heterotrophic methods to enhance the benefits of biodiesel based on waste treatment. The study demonstrates that by integrating autotrophic and heterotrophic biodiesel production, it is feasible to attain substantial economic advantages while maximizing carbon sequestration and reducing emissions. It shows a 62.73 % cost reduction for 1 ton of biodiesel produced using the coupled heterotrophic method over traditional photobioreactors. Additionally, compared with the corresponding heterotrophic proliferation, the carbon emissions of biodiesel under autotrophic coupled heterotrophic proliferation were reduced by 21.16 % and 24.08 %, respectively. The total economic benefits of biodiesel under autotrophic coupled heterotrophic proliferation increased by 2.12 % and 3.10 % compared to heterotrophic proliferation. However, it should be noted that due to the high carbon emissions caused by the heterotrophic proliferation of microalgae, biodiesel does not achieve negative carbon emissions. This study provides a new development strategy for waste resource utilization and microalgae bioenergy production phase. It will provide a theoretical and practical framework for utilizing microalgae biodiesel to achieve worldwide carbon neutrality.