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Everything from the exact number of wells installed on a landfill cell, to the type of collection system, affects the selection of a cover material.
Most of the factors that control the final gas production rate of any particular landfill cell, such as soil compaction or liner selection, are chosen long before it’s closed.
Designing a landfill cell with gas collection in mind from the start, is the best way to maximize production over time.
It’s easy to assume that all gas issues in a landfill cell are handled by the cover and that the liner only manages leachate and other liquids.
Gas release may begin as soon as the first layer of waste is added to the cell, but these early discharges of carbon dioxide and methane are usually permitted as long as they’re limited.
While landfill systems designed for gas collection and control may be primarily focused on gases, liquids also play important roles and can’t be overlooked.
Landfill gas is often mistaken for being a single type of gas due to being referred to by the LFG term.
All waste eventually breaks down, even if it takes thousands of years.