Relationships between analytical methods utilized as tools in the evaluation of landfill waste stability

Methane production in anaerobic digestion of organic waste from Recife (Brazil) landfill: evaluation in refuse of diferent ages

“…Important parameters to determine the organic matter stabilization are the ratio cellulose/lignin (C/L), the volatile solid content (VS) of the residual mass (broadly employed due to its low cost; besides, it is easy to obtain), and biochemical methane potential (BMP) analysis (Hansen et al, 2004;Kelly et al, 2006). The biochemical methane potential (BMP) assay can measure a small fraction of refuse, usually incubated with inoculums and in an anaerobic environment, that can be effectively converted into biogas.…”

“…Speed, simplicity and low cost are some of the advantages which make BMP a suitable method used to estimate the generation of biogas from organic refuse (Alves, 2008;Angelidaki et al, 2009;Hansen et al, 2004;Kelly et al, 2006;Labatut et al, 2011;Maciel, 2009;Maciel and Jucá, 2011). Despite de number of studies available in the literature, the comparison of biodegradability data between them is a hard task, due to the diversity of experimental conditions, such as substrate and inoculums amounts, inoculum nature, the flask headspace volume, environmental parameters, etc., besides the (Angelidaki et al, 2009).…”

Biodegradation stability of organic solid waste characterized by physico-chemical parameters

“…One to four samples per hectare have been recommended [1] but the sampling intensity depends on the heterogeneity of the site. A drill rig equipped with a bucket auger can be used to obtain samples from different depths [2,3]. The main problems of some drilling techniques are their high costs together with a significant sample alteration (fragmentation of landfilled materials), but they permit to observe the variation of waste properties with depth.…”

“…Most of these latter come from the attempt of assessing the stabilization state of bioreactor landfills [7][8][9][10][11]. Others directly tried to characterize old landfills [12,13], study stabilization indicators and anaerobic biodegradability of the buried waste [14,15] or establish correlations between different waste parameters [2,16,17]. Table 1 shows the analyses used for old waste characterization in the consulted studies together with their fundamentals.…”

“…Biochemical methane potential (BMP), Gas production (GP) Determination of the quantity of methane (or gas) from anaerobically decomposing organic matter in laboratory batch tests. The sample is incubated with a seed of appropriate bacteria under optimised conditions and methane (or gas) generation is measured by simultaneous measurements of gas volume and composition [2,4,6,7,14,17,18]. Respirometry (RA, RI) Assessment of the activity of a sample through its oxygen consumption.…”