Which statement about layering landfills is correct?

Which statement about layering landfills is correct?

• A. To speed up waste decomposition
• B. Reduce oxygen, slow decomposition, limit odor and pests
• C. To enable easier recycling
• D. To prevent gas formation

Answer: (B)

Layering landfills is about shaping the waste environment by limiting oxygen. When waste sits exposed, oxygen speeds microbial activity, leading to faster decomposition, stronger odors, and more pests. By layering soil or daily covers over the waste, the landfill becomes more anaerobic, which slows decomposition and helps reduce odors and pests. This approach also aids in stabilizing the waste mass and supporting later gas collection and leachate management. So, the goal isn’t to speed up decomposition, enable easier recycling, or stop gas formation. It’s about creating conditions that slow decomposition to control odors and pests; gas will still form and is managed separately, not prevented.

Layering landfills is about shaping the waste environment by limiting oxygen. When waste sits exposed, oxygen speeds microbial activity, leading to faster decomposition, stronger odors, and more pests. By layering soil or daily covers over the waste, the landfill becomes more anaerobic, which slows decomposition and helps reduce odors and pests. This approach also aids in stabilizing the waste mass and supporting later gas collection and leachate management.

So, the goal isn’t to speed up decomposition, enable easier recycling, or stop gas formation. It’s about creating conditions that slow decomposition to control odors and pests; gas will still form and is managed separately, not prevented.