| Title: | Degradation of biogas in a simulated landfill cover soil at laboratory scale: Compositional changes of main components and volatile organic compounds |
| Author(s): | Randazzo A; Zorzi F; Venturi S; Bicocchi G; Viti G; Tatano F; Tassi F; |
| Address: | "Department of Earth Sciences, University of Florence, Via G. La Pira 4, 50121 Firenze, Italy; IGG - Institute of Geosciences and Earth Resources, CNR - National Research Council of Italy, Via G. La Pira 4, 50121 Firenze, Italy. Electronic address: antonio.randazzo@unifi.it. Department of Earth Sciences, University of Florence, Via G. La Pira 4, 50121 Firenze, Italy. Department of Earth Sciences, University of Florence, Via G. La Pira 4, 50121 Firenze, Italy; IGG - Institute of Geosciences and Earth Resources, CNR - National Research Council of Italy, Via G. La Pira 4, 50121 Firenze, Italy. DiSPeA - Department of Pure and Applied Sciences, Section ChEM - Chemistry, Environment, and Materials, University of Urbino 'Carlo Bo', Campus Scientifico 'E. Mattei', 61029 Urbino, Italy" |
| DOI: | 10.1016/j.wasman.2022.12.027 |
| ISSN/ISBN: | 1879-2456 (Electronic) 0956-053X (Linking) |
| Abstract: | "A laboratory experiment lasting 28 days was run to simulate a typical landfill system and to investigate the compositional changes affecting the main components (CH(4), CO(2), and H(2)) and nonmethane volatile organic compounds from biogas generated by anaerobic digestion of food waste and passing through a soil column. Gas samples were periodically collected from both the digester headspace and the soil column at increasing distances from the biogas source. CH(4) and H(2) were efficiently degraded along the soil column. The isotopic values of delta(13)C measured in CH(4) and CO(2) from the soil column were relatively enriched in (13)C compared to the biogas. Aromatics and alkanes were the most abundant groups in the biogas samples. Among these compounds, alkylated benzenes and long-chain C(3+) alkanes were significantly degraded within the soil column, whereas benzene and short-chain alkanes were recalcitrant. Terpene and O-substituted compounds were relatively stable under oxidising conditions. Cyclic, alkene, S-substituted, and halogenated compounds, which exhibited minor amounts in the digester headspace, were virtually absent in the soil column. These results pointed out how many recalcitrant potentially toxic and polluting compounds tend to be relatively enriched along the soil column, claiming action to minimise diffuse landfill gas (LFG) emissions. The proposed experimental approach represents a reliable tool for investigating the attenuation capacities of landfill cover soils for LFG components and developing optimised covers by adopting proper soil treatments and operating conditions to improve their degradation efficiencies" |
| Keywords: | *Volatile Organic Compounds *Refuse Disposal/methods Biofuels Carbon Dioxide Soil Food Methane Waste Disposal Facilities Alkanes Anaerobic digestion Biogas Degradation Landfill cover soil Landfill gas VOCs; |
| Notes: | "MedlineRandazzo, Antonio Zorzi, Francesca Venturi, Stefania Bicocchi, Gabriele Viti, Gregorio Tatano, Fabio Tassi, Franco eng 2022/12/29 Waste Manag. 2023 Feb 15; 157:229-241. doi: 10.1016/j.wasman.2022.12.027. Epub 2022 Dec 26" |
