Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, 84084, Fisciano, Italy.
Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, 84084, Fisciano, Italy; Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, 84084, via Giovanni Paolo II, Fisciano, Italy.
J Environ Manage. 2024 Apr;357:120830. doi: 10.1016/j.jenvman.2024.120830. Epub 2024 Apr 6.
Greenhouse gases (GHGs) emissions due to increasing energy demand have raised the need to identify effective solutions to produce clean and renewable energy. Biotechnologies are an effective platform to attain green transition objectives, especially when synergically integrated to promote health and environmental protection. In this context, microalgae-based biotechnologies are considered among the most effective tools for treating gaseous effluents and simultaneously capturing carbon sources for further biomass valorisation. The production of biodiesel is regarded as a promising avenue for harnessing value from residual algal biomass. Nonetheless, the existing techniques for extracting lipids still face certain limitations, primarily centred around the cost-effectiveness of the process.This study is dedicated to developing and optimising an innovative and cost-efficient technique for extracting lipids from algal biomass produced during gaseous emissions treatment based on algal-bacterial biotechnology. This integrated treatment technology combines a bio-scrubber for degrading gaseous contaminants and a photobioreactor for capturing the produced CO within valuable algal biomass. The cultivated biomass is then processed with the process newly designed to extract lipids simultaneously transesterificated in fatty acid methyl esters (FAME) via In Situ Transesterification (IST) with a Kumagawa-type extractor. The results of this study demonstrated the potential application of the optimised method to overcome the gap to green transition. Energy production was obtained from residuals produced during the necessary treatment of gaseous emissions. Using hexane-methanol (v/v = 19:1) mixture in the presence KOH in Kumagawa extractor lipids were extracted with extraction yield higher than 12% and converted in fatty acid methyl esters. The process showed the enhanced extraction of lipids converted in bio-sourced fuels with circular economy approach, broadening the applicability of biotechnologies as sustainable tools for energy source diversification.
温室气体（GHGs）排放的增加导致对有效解决清洁能源和可再生能源生产的需求增加。生物技术是实现绿色转型目标的有效平台，尤其是在协同整合以促进健康和环境保护方面。在这种情况下，基于微藻的生物技术被认为是处理气态排放物和同时捕获碳源以进一步实现生物质增值的最有效工具之一。生物柴油的生产被认为是利用剩余藻生物质价值的有前途的途径。然而，现有的提取脂质技术仍然存在一些限制，主要集中在工艺的成本效益上。本研究致力于开发和优化一种基于藻菌生物技术从气态排放物处理过程中产生的藻生物质中提取脂质的创新且具有成本效益的技术。这种集成处理技术结合了生物洗涤器用于降解气态污染物和光生物反应器用于捕获产生的 CO 在有价值的藻生物质内。然后，用新设计的工艺处理培养的生物质，同时通过原位酯交换（IST）用 Kumagawa 型萃取器将其转化为脂肪酸甲酯（FAME）进行酯交换。该研究的结果表明，优化方法具有潜在的应用前景，可以克服绿色转型的差距。从气态排放物必要处理过程中产生的残留物中获得了能源生产。在 Kumagawa 萃取器中使用正己烷-甲醇（v/v=19:1）混合物并加入 KOH，可以以高于 12%的萃取产率提取脂质，并将其转化为脂肪酸甲酯。该过程显示了通过循环经济方法增强了生物来源燃料的脂质提取，拓宽了生物技术作为能源多样化可持续工具的适用性。
