The growing demand for space and financial resources to manage current and new municipal solid waste (MSW) landfills has become a massive challenge for several countries. Additionally, landfills contribute to adverse environmental impacts such as pollution and CO₂ (carbon dioxide) and CH₄ (methane) emissions. This paper has analyzed the possibility of producing biogas from landfilled MSW. An easily degradable fraction of landfilled MSW with 8 years of landfilling was mined and subjected to chemical characterization and elemental composition analysis. The abbreviation for the study sample was called ED8 – Mined. The low values of lignin (24.5%) and nitrogen content (0.7%) and high values of holocellulose (75.9%) and C/N (46.1%) on dry basis were obtained resulting in materials with the potential to be used for biogas generation. Recalcitrant materials were found in greater amounts than easily biodegradable fresh MSW fractions. The reuse of energy from landfilled MSW can contribute positively to the country’s environment and economy, reducing environmental liabilities and generating energy in a controlled way. In Delta A Sanitary Landfill, Southeastern Brazil, the recovery of the ED8 – Mined would reflect a significant recovery of about 100,000 tonnes of landfilled materials for annual MSW cells of about 450,000 tonnes, allowing recovery of materials and space expansion for rejects.

Graphical abstract

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中文翻译：

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从填埋的易降解城市固体废物中生产沼气：能源回收的采矿策略

管理当前和新的城市固体废物 (MSW) 填埋场对空间和财政资源的需求不断增长，这已成为一些国家面临的巨大挑战。此外，垃圾填埋场还会对环境造成不利影响，例如污染和 CO ₂（二氧化碳）和 CH ₄（甲烷）排放。本文分析了从垃圾填埋的 MSW 生产沼气的可能性。开采了经过 8 年填埋后易于降解的垃圾填埋垃圾，并对其进行化学表征和元素组成分析。研究样本的缩写称为 ED8 – Mined。获得了低值的木质素 (24.5%) 和氮含量 (0.7%) 以及高值的全纤维素 (75.9%) 和 C/N (46.1%)（以干基计），这些材料具有用于沼气产生的潜力. 与易于生物降解的新鲜 MSW 级分相比，顽固性材料的含量更高。垃圾填埋的城市固体废物的能源再利用可以为国家的环境和经济做出积极贡献，减少环境责任并以可控的方式产生能源。

图形概要

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