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Landfilling in MSW Management |
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University of Padua IMAGE Department |
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Role of landfilling • Sanitary landfill remains an integral part of existing as well as new strategies for solid waste disposal • At the moment landfill is applied widely with big differences in the quality (design, management) in the different countries, reflecting the economic and social development • The quality range in the waste disposal systems varies between uncontrolled landfill and the first application of integrated solid waste management strategies • The main role of sanitary landfill in the current situation is to ensure a waste disposal with minimal environmental impact • The technical level in landfill realization (impermeabilization, leachate disposal, biogas management) should be compatible with the existing situation and upgraded according to further general development in the countries • The separation from MSW of hazardous components, material and energy recovery and the generated residues lead to final waste stream which concentrate elements potentially hazardous to the environment • It is essential to use pre-treatment steps before landfilling and adopt high quality standards for landfill design and constrution in order to achieve the final storage quality Landfill management in Asia • Solid waste disposal still means open dumping in most low and middle-income countries in Asia • Improvements to existing dumps that fit existing and evolvine technical capability and economic feasibility should be gradually introduced • Sanitary landfilling is considered the most cost-effective and realistic method of solid waste disposal, at least in the short and medium terms • Landfill hydrology is an important issue because most landfills are located in regions with a monsoon climate where extremely high rainfall for a few months is followed by a dry season with high evaporation rates |