Advancements in anaerobic digestion of organic waste for sustainable biogas production.

IF 5.8 3区环境科学与生态学 0 ENVIRONMENTAL SCIENCES

Environmental Science and Pollution Research Pub Date : 2025-07-25 DOI:10.1007/s11356-025-36783-9

Naeemah A Ibrahim, Halah H Majeed, Thaer A Jwaid, Kiman Silas

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Abstract

The increasing global energy demand, driven by urbanization and population growth, has intensified waste generation and dependence on fossil fuels, exacerbating climate change. This study investigates the performance of anaerobic digestion (AD) in converting organic waste into biogas and nutrient-rich digestate, with a focus on key operational parameters: pH, temperature, organic loading rate (OLR), particle size (PS), carbon-to-nitrogen ratio (C/N), hydraulic retention time (HRT), moisture content (MC), and the stages of microbial conversion. Laboratory-scale experiments demonstrated that maintaining a pH range of 6.8-7.2, mesophilic temperatures (35-37 °C), and a C/N ratio between 20 and 30 significantly improved methane yield. Co-digestion strategies and electromagnetic field stimulation enhanced biogas production by up to 25%, addressing common issues of low methane content and process instability. The study concludes that optimizing substrate composition and reactor design can substantially increase AD efficiency, making it a viable technology for sustainable energy generation and waste management.

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有机废物厌氧消化可持续沼气生产的研究进展。

在城市化和人口增长的推动下，全球不断增长的能源需求加剧了废物的产生和对化石燃料的依赖，加剧了气候变化。本研究考察了厌氧消化（AD）将有机废物转化为沼气和营养丰富的消化液的性能，重点研究了关键操作参数：pH、温度、有机负荷率（OLR）、粒径（PS）、碳氮比（C/N）、水力停留时间（HRT）、水分含量（MC）和微生物转化阶段。实验室规模的实验表明，保持pH值在6.8 ~ 7.2，中温温度（35 ~ 37℃），C/N比值在20 ~ 30之间显著提高了甲烷产量。共消化策略和电磁场刺激使沼气产量提高了25%，解决了甲烷含量低和工艺不稳定的常见问题。该研究得出结论，优化衬底组成和反应器设计可以大大提高AD效率，使其成为可持续能源生产和废物管理的可行技术。

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 Science and Pollution Research 环境科学-环境科学

CiteScore

8.70

自引率

17.20%

发文量

6549

审稿时长

3.8 months

期刊介绍： Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.