Abstract
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.
Highlights
Mechanical biological treatment (MBT) has attracted increased research interest since it was proposed in the late 1990s [1, 2]. e MBT technology involves screening and shredding by mechanical treatment, selecting large-sized plastic by hand and recyclable materials by magnetic separation, and treating the organic materials by biological treatment; the remaining waste is disposed to landfills [3, 4]
Permeability tests were conducted on MBT waste with different particle sizes using a compression and permeability combined apparatus and a large-scale vertical permeability apparatus. e following conclusions can be drawn from the study results: (1) e components in the waste samples were related to the particle sizes. e components of plastics and textiles in the MBT waste were mainly of large size
At the same dry density (0.7 g/cm3), the permeability of P1-1 was 1-2 orders of magnitude greater than those of P1-2 and P1-3. e permeability of samples with smaller particle sizes decreased to a greater extent with the increase in the dry density
Summary
Mechanical biological treatment (MBT) has attracted increased research interest since it was proposed in the late 1990s [1, 2]. e MBT technology involves screening and shredding by mechanical treatment, selecting large-sized plastic by hand and recyclable materials by magnetic separation, and treating the organic materials by biological treatment; the remaining waste is disposed to landfills [3, 4]. Mechanical biological treatment (MBT) has attracted increased research interest since it was proposed in the late 1990s [1, 2]. E MBT technology involves screening and shredding by mechanical treatment, selecting large-sized plastic by hand and recyclable materials by magnetic separation, and treating the organic materials by biological treatment; the remaining waste is disposed to landfills [3, 4]. Adani et al [7] found that in Italy the input raw materials (MSW) are treated differently in the MBT process. E waste (
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