Methods for determining the methane generation potential and methane generation rate constant for the FOD model: a review

• Published in: Waste Management & Research Vol. 36; no. 3; pp. 200 - 220
• Main Authors: Park, Jin-Kyu, Chong, Yong-Gil, Tameda, Kazuo, Lee, Nam-Hoon
• Format: Book Review Journal Article
• Language: English
• Published: London, England SAGE Publications 01.03.2018; Sage Publications Ltd
• Subjects: Bioavailability; Cellulose; Comparative studies; Computer simulation; Decomposition; Degradation; Laboratories; Landfill; Landfills; Lignin; Literature reviews; Methane; Methane generation; Municipal solid waste; Municipal waste management; Organic carbon; Regression analysis; Regression models; Reviews; Solid waste management; Solid wastes; Waste disposal sites; municipal solid waste; methane generation potential; first-order decay model; Landfill; methane generation rate constant
• ISSN: 0734-242X; 1096-3669
• DOI: 10.1177/0734242X17753532

In the first order decay (FOD) model of landfill methane generation, the methane generation potential (L0) and methane generation rate constant (k) for both bulk municipal solid waste (MSW) and individual waste components have been determined by a variety of approaches throughout various literature. Differences in the determination methods for L0 and k are related to differences in our understanding of the waste decomposition dynamics. A thorough understanding of the various available methods for determining L0 and k values is critical for comparative study and the drawing of valid conclusions. The aim of this paper is to review the literature on the available determining methods and the ranges for L0 and k values of both bulk MSW and individual waste components, while focusing on understanding the decomposition of waste, including the role of lignin. L0 estimates in the literature are highly variable and have been derived from theoretical stoichiometric calculations, laboratory experiments, or actual field measurements. The lignin concentration in waste is correlated with the fraction of total degradable organic carbon (DOCf) that will actually anaerobically degrade in the landfill. The k value has been determined by precipitation rates, laboratory simulations, aged-defined waste sample, and model fitting or regression analysis using actual gas data. However, the lignin concentration does not correlate well with the k value, presumably due to the impact of lignin arrangement and structure on cellulose bioavailability and degradation rate. In sum, this review summarizes the literature on the measurement of L0 and k values, including the dynamics and decomposition of bulk MSW and individual waste components within landfills.