Mechanical biological treatment (MBT) is a waste processing technology that helps conserve resources and reduce emissions harmful to the environment. The treatment of municipal solid waste (MSW) using MBT is a hot topic in environmental geotechnical engineering. Permeability tests were carried out on MBT waste using a compression and permeability combined apparatus and a large-scale vertical permeability apparatus taking the influence of particle size into consideration. The permeability of samples with smaller particle sizes was found to be lower for the same pressure and dry mass (%) of component. The best-fit line between the logarithmic permeability and variables such as the dry density was linear. As the dry density increased or the void ratio decreased, the permeability of samples with smaller particles decreased more. The logarithmic permeability increased with the increase in the average particle size and void ratio. The permeabilities of MBT waste corresponding to particle size ranges of 0–10, 0–20, and 0–40 mm were 10⁻¹⁰–10⁻⁵, 10⁻⁸–10⁻⁴, and 10⁻⁵–10⁻³ m/s, respectively. The difference between MBT waste and MSW was analyzed in terms of their permeability. The results of MBT waste were compared with those reported in previous studies to provide reference for the permeability analysis of MBT landfills.

中文翻译：

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粒径对经过机械和生物处理的废物的水力特性的影响

机械生物处理（MBT）是一种废物处理技术，可帮助节约资源并减少对环境有害的排放。使用MBT处理城市固体废物（MSW）是环境岩土工程中的热门话题。考虑到粒径的影响，使用压缩和渗透性组合设备和大型垂直渗透性设备对MBT废物进行了渗透性测试。对于相同的压力和组分的干质量（％），发现具有较小粒径的样品的渗透性较低。对数渗透率与变量（如干密度）之间的最佳拟合线是线性的。随着干密度的增加或空隙率的降低，具有较小颗粒的样品的渗透性进一步降低。对数磁导率随平均粒径和空隙率的增加而增加。MBT废料的渗透率（对应于0-10、0-20和0-40 mm的粒径范围）为10^-10 -10 ^-5，10 ^-8 -10 ^-4，以及10 ^-5 -10 ^-3 米/秒，分别。分析了MBT废物和MSW的渗透性之间的差异。将MBT垃圾的结果与以前的研究报告进行了比较，为MBT垃圾填埋场的渗透性分析提供参考。