Optimization of the startup phase of semi-continuous biogas reactors through co-digestion of Organic Solid Waste (OSW).

IF 2 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Franciele Natividade Luiz, Emilene de Carvalho Lourenço, Guilherme Pavão Gomes, Márcia Regina Becker
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引用次数: 0

Abstract

This study evaluates biogas production from co-digested organic waste in a bench-scale semi-continuous Continuous Stirred Tank Reactor (CSTR). The use of organic waste in anaerobic digestion (AD) enables sustainable practices that help diversify the energy portfolio and reach decarbonization goals. However, the challenges associated with the operation of anaerobic reactor require studies and guidelines aimed at strategies for establishing biogas plants. This study assesses the production potential at the start of the operation of a Continuous Stirred Tank Reactor (CSTR), using a mixture of organic solid waste (OSW) that includes food waste, olive oil and pasta, selected for their high organic load and lipid-rich composition-was used to assess biogas production potential at startup. Essays were performed to determine biogas production and Biochemical Methane Potential (BMP) for progressive Organic Loading Rates (OLR) added to the semi-continuous reactor. The maximum biogas yield, based on the value obtained in the BMP assay occurred at an OLR of 4.49 gVS/L, while higher rates led to system instability and a significant drop in performance to 22% Volatile Solids (VS) removal remained above 70% and the methane content achieved excellent levels throughout the operation. This study shows the feasibility of using co-digestion of organic waste to produce biogas with excellent methane and highlights the innovative application of progressive OLR ramping as a start-up strategy that stabilizes anaerobic reactor performance, addressing common challenges in biogas plant implementation. Additionally, the results underscore the contribution of biogas to achieving energy sustainability goals and reducing greenhouse gas emissions.

有机固体废物共消化半连续式沼气反应器启动阶段的优化
本研究在实验规模的半连续连续搅拌槽反应器(CSTR)中评估了有机废物共消化产生沼气的情况。在厌氧消化(AD)中使用有机废物可以实现可持续实践,有助于实现能源组合的多样化并实现脱碳目标。然而,与厌氧反应器运行相关的挑战需要针对建立沼气厂的策略进行研究和指导。本研究评估了连续搅拌槽式反应器(CSTR)开始运行时的生产潜力,使用有机固体废物(OSW)的混合物,包括食物垃圾、橄榄油和面食,选择它们的高有机负荷和富含脂质的成分,用于评估启动时的沼气生产潜力。在半连续反应器中添加渐进式有机负荷率(OLR),以测定沼气产量和生化甲烷势(BMP)。根据BMP测定获得的值,最大沼气产量发生在OLR为4.49 gVS/L时,而较高的速率导致系统不稳定,性能显著下降至22%,挥发性固体(VS)去除率保持在70%以上,甲烷含量在整个操作过程中保持良好水平。本研究显示了利用有机废物共消化生产沼气的可行性,并强调了渐进式OLR斜坡作为稳定厌氧反应器性能的启动策略的创新应用,解决了沼气工厂实施中的共同挑战。此外,研究结果强调了沼气对实现能源可持续发展目标和减少温室气体排放的贡献。
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
Environmental Technology
Environmental Technology 环境科学-环境科学
CiteScore
6.50
自引率
3.60%
发文量
0
审稿时长
4 months
期刊介绍: Environmental Technology is a leading journal for the rapid publication of science and technology papers on a wide range of topics in applied environmental studies, from environmental engineering to environmental biotechnology, the circular economy, municipal and industrial wastewater management, drinking-water treatment, air- and water-pollution control, solid-waste management, industrial hygiene and associated technologies. Environmental Technology is intended to provide rapid publication of new developments in environmental technology. The journal has an international readership with a broad scientific base. Contributions will be accepted from scientists and engineers in industry, government and universities. Accepted manuscripts are generally published within four months. Please note that Environmental Technology does not publish any review papers unless for a specified special issue which is decided by the Editor. Please do submit your review papers to our sister journal Environmental Technology Reviews at http://www.tandfonline.com/toc/tetr20/current
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