Sustainable route to biodiesel via eco-friendly supercritical fluid extraction of lipids from heterogeneous and widely available organic fraction of municipal solid waste

IF 7.2 2区工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of CO2 Utilization Pub Date : 2025-06-07 DOI:10.1016/j.jcou.2025.103135

Valeria Sini , Marco Lo Presti , Lella Miccolis , Alessio Pollice , Gianfranco D’Onghia , Abraham Abe , Annalisa De Boni , Rocco Roma , Roberta Ragni , Pietro Cotugno

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引用次数: 0

Abstract

The Organic Fraction of Municipal Solid Waste (OFMSW) can play a key role in the frame of a circular economy since it contains valuable compounds such as lipids which are beneficial for the production of biofuel. In this study, an efficient and eco-sustainable extraction method using supercritical carbon dioxide (sc-CO₂) to extract lipids from OFMSW is reported. This approach highlights the great potential of both OFMSW and Supercritical Fluid-based Extraction (SFE) versus already reported studies primarily focused on specific food-processing waste. The heterogeneous OFMSW generated in municipal areas, and often disposed of in landfills, is herein investigated as an abundant resource still suitable for sustainable valorization. Extraction parameters were explored using a Response Surface Methodology (RSM), allowing to achieve a lipid extraction yield of 19.25 % at optimal conditions (410 bar, 55 °C, 7.5 l/min). The result of the sc-CO₂ based method is comparable to Soxhlet extraction while also bringing about the advantage of extracting without using harmful organic solvents. Furthermore, extracted lipids were converted into fatty acid methyl esters (FAMEs) rich in long-chain alkyl products (C10-C18), with potential applications as biodiesel for use in the energy sector. This innovative approach not only valorizes OFMSW but also addresses issues related to the depletion of raw materials, contributing to the generation of eco-friendly products and promoting environmental sustainability via a zero-waste approach.

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可持续的途径，通过生态友好的超临界流体提取脂质从异质和广泛利用的有机部分的城市固体废物

城市固体废物的有机部分（OFMSW）可以在循环经济的框架中发挥关键作用，因为它含有有价值的化合物，如脂类，有利于生产生物燃料。本研究报道了一种高效、生态可持续的超临界二氧化碳（sc-CO2）提取OFMSW中脂类的方法。这种方法突出了OFMSW和超临界流体萃取（SFE）的巨大潜力，而不是已经报道的主要关注特定食品加工废物的研究。城市产生的异质固体垃圾通常被填埋在垃圾填埋场，本文将其作为一种仍然适合可持续增值的丰富资源进行研究。采用响应面法（RSM）探索提取参数，在最佳条件（410 bar, 55 °C, 7.5 l/min）下，脂质提取率为19.25 %。sc-CO2基方法的提取结果与索氏提取相当，同时也具有不使用有害有机溶剂提取的优点。此外，提取的油脂被转化为富含长链烷基产物（C10-C18）的脂肪酸甲酯（FAMEs），具有在能源领域作为生物柴油的潜在应用前景。这种创新的方法不仅使OFMSW的价值增加，而且还解决了与原材料消耗有关的问题，有助于生产环保产品，并通过零废物的方法促进环境的可持续性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

13.90

自引率

10.40%

发文量

406

审稿时长

2.8 months

期刊介绍： The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.