Soil mechanical properties of MBT waste from Luxembourg, Germany and Thailand
Soil mechanical properties of MBT waste from Luxembourg, Germany and Thailand
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发表时间：
2014
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通讯作者：
Pattaraporn Pimolthai;Jean-Frank Wagner
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作者：
Pattaraporn Pimolthai;Jean-Frank Wagner
废物的机械和生物处理（MBT）在欧洲和亚洲已广为人知。通过在机械处理过程中从城市固体废物中去除较大的塑料材料，减少了废物的最大颗粒尺寸。MBT废料的机械性能通过该过程显著改变。一个有效的处理系统可以导致更好的输出材料的质量，而不会造成环境问题。本文比较了来自卢森堡、德国和泰国的MBT废料的力学性能。本研究主要针对MBT样品中10 mm以下的部分，以描述和评估小尺寸材料作为填埋场覆盖衬垫的潜在应用。因此，对MBT样品的较小10 mm部分进行土工性能测试。在实验室试验中对小尺寸废物颗粒进行了分析，以确定其颗粒大小、颗粒形状、压实度、渗透性、剪切强度、孔隙率和吸水能力，包括与土壤材料的特性进行比较。结果表明，还原的颗粒可能充当具有高吸水潜力的致密、低渗透性材料。材料中剩余的纤维和箔组分的量导致样品中不同的机械和液压行为。MBT样品的渗滤液显示出非常低的浓度的化学需氧量，铵，和重金属相比，未经处理的垃圾填埋场渗滤液。
Mechanical and biological treatments (MBT) of waste have become well known in Europe and Asia. The maximum particle size of waste is reduced by the removal of larger plastic materials from municipal solid waste during mechanical processing. The mechanical properties of the MBT waste are significantly changed by this process. An effective treatment system can lead to a better quality of output materials which do not cause environmental problems. This paper shows the comparative mechanical properties of MBT wastes from Luxembourg, Germany and Thailand. This research focused on the smaller 10 mm-fraction of MBT samples, in order to describe and evaluate the potential application of the small size material as a cover liner in landfill sites. Therefore the smaller 10 mm-fraction of MBT samples were tested for geotechnical properties. The small size waste particles were analysed in laboratory tests in order to determine their particle size, particle shape, compaction, permeability, shear strength, porosity and water absorption capacity, including comparison with the properties of soil material. The results showed that reduced particles were likely to act as a compact, low permeable material with a high potential for water absorption. The amount of remaining fibre and foil components in the materials cause different mechanical and hydraulic behaviours in the samples. The leachate of MBT samples showed very low concentrations of chemical oxygen demand, ammonium, and heavy metals, compared to the landfill leachate of untreated waste.