Department of Water, Atmosphere and Environment, Institute of Waste Management, University of Natural Resources and Life Sciences, Vienna, Austria.
Biodegradation. 2012 Jun;23(3):407-14. doi: 10.1007/s10532-011-9519-4. Epub 2011 Nov 17.
For waste management, methane emissions from landfills and their effect on climate change are of serious concern. Current models for biogas generation that focus on the economic use of the landfill gas are usually based on first order chemical reactions (exponential decay), underestimating the long-term emissions of landfills. The presented study concentrated on the curve fitting and the quantification of the gas generation during the final degradation phase under optimal anaerobic conditions. For this purpose the long-term gas generation (240-1,830 days) of different mechanically biologically treated (MBT) waste materials was measured. In this study the late gas generation was modeled by a log-normal distribution curve to gather the maximum gas generation potential. According to the log-normal model the observed gas sum curve leads to higher values than commonly used exponential decay models. The prediction of the final phase of landfill gas generation by a fitting model provides a basis for CO(2) balances in waste management and some information to which extent landfills serve as carbon sink.
就废物管理而言，垃圾填埋场产生的甲烷及其对气候变化的影响是严重关切的问题。目前侧重于经济利用垃圾填埋气的沼气生成模型通常基于一级化学反应（指数衰减），从而低估了垃圾填埋场的长期排放量。本研究集中于在最佳厌氧条件下对最终降解阶段的气体生成进行曲线拟合和量化。为此，对不同机械生物处理（MBT）废物材料的长期气体生成（240-1830 天）进行了测量。在本研究中，通过对数正态分布曲线对后期气体生成进行建模，以收集最大气体生成潜力。根据对数正态模型，观察到的气体总和曲线得出的值高于常用的指数衰减模型。通过拟合模型预测垃圾填埋气生成的最后阶段为废物管理中的 CO2 平衡提供了基础，并提供了一些有关垃圾填埋场作为碳汇的程度的信息。
