INVESTIGATION OF BIOGAS TRANSPORT IN HYDROPHOBIC PERMEABLE MEDIUM FOR BIOCELLS

摘要

At landfill, methane and carbon dioxide migrate hysterically in porous media in/and around landfill. To control biogas migration in landfill, new permeable medium in this research is proposed for biocell landfills. The permeable hydrophobic polymer medium used in this research repels water, contains more than 90 % air, and thus provides highly permeable medium for gas transport. Styrofoam has been tested as hydrophobic polymer to find its physical properties for gas conveyance. The test procedure involves investigation for permeability coefficient of polymer medium, conductivity coefficient and diffusion coefficient of carbon dioxide and methane in polymer medium. Carbon dioxide and methane convective flow rate and diffusive flux through polymer medium are tested. The influence of water content, porosity, and temperature on gas diffusion and convection are also tested. The findings of this research show that the hydrophobic dump material can be recycled as highly permeable and suitable medium for biogas collection and control in biocells.