An integrated biorefinery approach based on spent coffee grounds valorization

IF 10 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Cleaner Production Pub Date : 2025-09-30 DOI:10.1016/j.jclepro.2025.146716

Antonio M. Pérez-Merchán , Ramón Moreno-Tost , Irene Malpartida-García , Cristina García-Sancho , Josefa M. Mérida-Robles , Pedro Maireles-Torres

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Abstract

Spent coffee grounds (SCGs) are an abundant lignocellulosic biomass with significant potential for industrial valorization, with great social and environmental benefits, due to their rich composition in cellulose, hemicellulose and lignin. In this study, the organosolv process, a method widely used in the paper industry, was employed to efficiently fractionate SCGs into their primary components. Hemicellulosic liquors containing up to 25 wt% sugars, predominantly galactose and mannose, were successfully extracted and subsequently dehydrated to produce 5-hydroxymethylfurfural (5-HMF), reaching a maximum yield of 90 % within 15 min of reaction time. The residual cellulose and lignin fractions were characterized by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), confirming their effective separation. These findings highlight the viability of SCGs as a sustainable feedstock for biorefinery applications, contributing to waste valorization and the development of a circular economy.

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一种基于废咖啡渣增值的综合生物炼制方法

咖啡渣是一种丰富的木质纤维素生物质，具有巨大的工业价值潜力，具有巨大的社会和环境效益，因为它们含有丰富的纤维素、半纤维素和木质素。在本研究中，采用有机溶剂法，一种广泛应用于造纸工业的方法，有效地将scg分离成其主要成分。成功地提取了含有高达25wt %糖（主要是半乳糖和甘露糖）的半纤维素酒，随后脱水生成5-羟甲基糠醛（5-HMF），在15分钟的反应时间内达到90%的最大收率。利用x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对残余纤维素和木质素组分进行了表征，证实了它们的有效分离。这些发现强调了scg作为生物炼制应用的可持续原料的可行性，有助于废物增值和循环经济的发展。

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来源期刊

Journal of Cleaner Production 环境科学-工程：环境

CiteScore

20.40

自引率

9.00%

发文量

4720

审稿时长

111 days

期刊介绍： The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.