The Bioenergetic Potential from Coffee Processing Residues: Towards an Industrial Symbiosis

IF 3.6 Q2 ENVIRONMENTAL SCIENCES Resources Pub Date : 2024-01-31 DOI:10.3390/resources13020021
Lorena Torres Albarracin, Irina Ramirez Mas, L. Fuess, R. P. Rodriguez, M. P. C. Volpi, Bruna de Souza Moraes
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Abstract

Coffee processing generates a large amount of organic waste, which has the potential for energy use through biogas production. Although Brazil dominates world coffee production, treating its residue with biogas technology is not a practice, especially due to this product’s seasonality, which hampers continuous digester operation. The implementation of biogas production from coffee residues in a concept of industrial symbiosis could overcome this. This work evaluates the biogas energy potential from the main liquid residues of coffee processing (i.e., mucilage and wash water) and their integration with glycerin and cattle manure. Around 2773 m3 biogas day−1 would be produced (75% CH4), used as biomethane (734 thousand m3 year−1), or thermal energy (23,000,000 MJ year−1), or electricity (2718 MWh year−1), which could supply, respectively, all the liquefied petroleum gas (LPG) and diesel demands of the farm, all the thermal energy demands of the grain drying process, as well as electricity for 30 residences. Considering the short coffee season, the results have a broader context for the application of biogas production on coffee processing farms, envisaging that the Agroindustrial Eco-Park concept has the potential to integrate various agroindustrial sectors for energy production, residue exchange, and water recirculation.
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咖啡加工残渣的生物能潜力:实现工业共生
咖啡加工过程中会产生大量有机废物,这些废物有可能通过生产沼气来利用能源。虽然巴西在世界咖啡生产中占主导地位,但用沼气技术处理咖啡残渣的做法并不普遍,特别是由于这种产品的季节性,妨碍了沼气池的连续运行。在工业共生概念中利用咖啡残渣生产沼气可以解决这一问题。这项工作评估了咖啡加工过程中主要液体残留物(即粘液和清洗水)的沼气能源潜力,以及它们与甘油和牛粪的结合。每天可产生约 2773 立方米沼气(75% CH4),用作生物甲烷(73.4 万立方米/年)、热能(2300 万兆焦/年)或电力(2718 兆瓦时/年),可分别满足农场的所有液化石油气(LPG)和柴油需求、谷物干燥过程的所有热能需求以及 30 个住宅的用电需求。考虑到咖啡季节较短,研究结果为咖啡加工农场沼气生产的应用提供了更广阔的背景,使人们认识到农业产业生态园的概念具有整合各农业产业部门的潜力,以实现能源生产、残渣交换和水循环。
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来源期刊
Resources
Resources Environmental Science-Nature and Landscape Conservation
CiteScore
7.20
自引率
6.10%
发文量
0
审稿时长
11 weeks
期刊介绍: Resources (ISSN 2079-9276) is an international, scholarly open access journal on the topic of natural resources. It publishes reviews, regular research papers, communications and short notes, and there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and methodical details must be provided so that the results can be reproduced. There are, in addition, unique features of this journal: manuscripts regarding research proposals and research ideas will be particularly welcomed, electronic files or software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Subject Areas: natural resources, water resources, mineral resources, energy resources, land resources, plant and animal resources, genetic resources, ecology resources, resource management and policy, resources conservation and recycling.
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