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Biogas |
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Gas issues in Landfill Management |
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Landfill plays a most important role in the framework of solid waste disposal and will remain an integral part of the new strategies based on integrated solid waste management. Landfill design concepts are mainly devoted towards ensuring minimal environmental impact in accordance with observations made concerning old landfills, but in recent years landfill design usually also includes facilities for controlling gas migration and utilization of the energy associated with the biogas. Gas generated in the landfill (LFG) is a result of a mass transfer process. Waste entering the landfill undergoes biological, chemical and physical transformation governing the relationship between the solid phase (the waste), the liquid phase (leachate) and the gas phase. The main components of the landfill gas (CH4, CO2) are a result of biological processes, while the trace components, which are numerous, are generated by biological processes as well as by volatilization. Gas landfill has existed as long as landfills have existed, but the realization of landfill gas causing problems to the environment is relatively recent. |
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University of Padua IMAGE Department |
