School of Water, Energy and Environment, Cranfield University, MK43 0AL, UK; Centre for Research in Environmental, Coastal and Hydrological Engineering (CRECHE), School of Engineering, University of KwaZulu-Natal, Howard College Campus, Durban 4041, South Africa.
School of Water, Energy and Environment, Cranfield University, MK43 0AL, UK.
Waste Manag. 2017 May;63:11-17. doi: 10.1016/j.wasman.2016.08.026. Epub 2016 Aug 28.
The aim of this study was to evaluate the spatial distribution of the paper and fines across seven landfill sites (LFS) and assess the relationship between waste physicochemical properties and biogas production. Physicochemical analysis of the waste samples demonstrated that there were no clear trends in the spatial distribution of total solids (TS), moisture content (MC) and waste organic strength (VS) across all LFS. There was however noticeable difference between samples from the same landfill site. The effect of landfill age on waste physicochemical properties showed no clear relationship, thus, providing evidence that waste remains dormant and non-degraded for long periods of time. Landfill age was however directly correlated with the biochemical methane potential (BMP) of waste; with the highest BMP obtained from the most recent LFS. BMP was also correlated with depth as the average methane production decreased linearly with increasing depth. There was also a high degree of correlation between the Enzymatic Hydrolysis Test (EHT) and BMP test results, which motivates its potential use as an alternative to the BMP test method. Further to this, there were also positive correlations between MC and VS, VS and biogas volume and biogas volume and CH content. Outcomes of this work can be used to inform waste degradation and methane enhancement strategies for improving recovery of methane from landfills.
本研究旨在评估纸质废物和纸浆在七个垃圾填埋场（LFS）中的空间分布，并评估废物理化性质与沼气产生之间的关系。对废物样本的理化分析表明，在所有 LFS 中，总固体（TS）、水分含量（MC）和废物有机强度（VS）的空间分布没有明显趋势。然而，同一垃圾填埋场的样本之间存在明显差异。垃圾填埋场年龄对废物理化性质的影响没有明显的关系，因此，有证据表明垃圾在很长一段时间内保持休眠和未降解状态。然而，垃圾填埋场年龄与废物的生物化学甲烷潜力（BMP）直接相关；最新的 LFS 获得的 BMP 最高。BMP 也与深度相关，因为随着深度的增加，平均甲烷产量呈线性下降。酶水解试验（EHT）和 BMP 试验结果之间也存在高度相关性，这促使其有可能替代 BMP 试验方法。除此之外，MC 和 VS、VS 和沼气体积以及沼气体积和 CH 含量之间也存在正相关关系。这项工作的结果可用于为改善从垃圾填埋场回收甲烷的策略提供信息，以促进废物降解和甲烷增强。
