Laboratory test investigations on soil water characteristic curve and air permeability of municipal solid waste
| Autor: | Jianyong Shi, Yingbo Ai, Xun Wu, Zhen Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Municipal solid waste Evaporation Environmental engineering Water 010501 environmental sciences 010502 geochemistry & geophysics Solid Waste 01 natural sciences Pollution Permeability Refuse Disposal Field capacity Void ratio Soil Inflection point Air permeability specific surface Soil water Environmental science Desiccation Water content 0105 earth and related environmental sciences |
| Zdroj: | Waste managementresearch : the journal of the International Solid Wastes and Public Cleansing Association, ISWA. 36(5) |
| ISSN: | 1096-3669 |
| Popis: | The air permeability coefficient has a high correlation with the water content of municipal solid waste. In this study, continuous drying methodology using a tension meter was employed to construct the soil water characteristic curve of municipal solid waste (M-SWCC). The municipal solid waste air permeability test was conducted by a newly designed apparatus. The measured M-SWCC was well reproduced by the van Genuchten (V-G) model and was used to predict the parameters of typical points in M-SWCC, including saturated water content, field capacity, residual water content and water content at the inflection point. It was found that the M-SWCC was significantly influenced by void ratio. The final evaporation and test period of M-SWCC increase with the increase in void ratio of municipal solid waste. The evolution of air permeability coefficient with water content of municipal solid waste depicted three distinct characteristic stages. It was observed that the water contents that corresponded to the two cut-off points of the three stages were residual water content and water content at the inflection point, respectively. The air permeability coefficient of municipal solid waste decreased with the increase of the water content from zero to the residual water content. The air permeability coefficient was almost invariable when the water content increased from residual water content to the water content at the inflection point. When the water content of municipal solid waste exceeded the water content at the inflection point, the air permeability coefficient sharply decreased with the increase of water content. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|