A new biochemical methane potential assay for landfilled waste using the organic fraction of municipal solid waste. (December 2020)

• Record Type: Journal Article
• Authors: Pearse, Lauretta Feyisetan; Hettiaratchi, J. Patrick A.; Da Costa, Daniela
• Is Part Of: Bioresource technology reports. Volume 12(2020)
• Publication Date: 2020-12
• Subjects: Biochemical methane potential -- Municipal solid waste -- Solid-phase -- Landfill gas -- Mathematical modeling -- Lo -- k; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2020.100579
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: This study was undertaken as a first step towards developing a new solid-phase biochemical methane potential (BMP) assay, termed Landfill BMP, to be representative of the methane generation potential of landfilled waste. Statistically designed laboratory batch experiments were conducted using organic fraction of municipal solid waste to compare the methane generation potential (Lo ) and the first-order rate coefficient (k) values from conventional slurry-phase BMP and new LBMP assays. Results showed statistically significant differences between Lo values, with the slurry-phase assay overestimating Lo by as much as 47 ± 12%. CH4 yields of the slurry and the solid-phase assays were as high as 183.6 mlCH4 /gVSwaste and 118.1 mlCH4 /gVSwaste, respectively. k values were overestimated by both slurry and solid-phase approaches, suggesting that laboratory experiments may not be the best approach to obtain k values. The highest coefficient of variation between duplicates in this study was 26%, indicating acceptable repeatability of results. Graphical abstract: Unlabelled Image Highlights: A solid-phase BMP assay termed Landfill BMP (LBMP) was developed. Study compared Lo and k values from LBMP and slurry-phase (conventional) BMP assays. Lo values from slurry-phase experiment were 47 ± 12% greater. Lo values from the LBMP method fell within range from lysimeter and field studies. k values were overestimated from both assays when compared to field studies.