Municipal Solid Waste Management

A: Option A would elevate backpressure and reduce flow but doesn't explain rising O2 during higher vacuum. Option B creates flow oscillation yet doesn't introduce atmospheric oxygen into a closed header. Option C skews readings but wouldn't correlate with methane dilution and condensate levels across the field. Option D pulls air past cracked seals under higher vacuum, diluting CH4, spiking O2, and increasing condensate due to cooling.

A: Option A slows uniform loss but chloride-driven underfilm corrosion will breach the lining at holidays. Option B pits rapidly in warm high-chloride leachate despite acceptable pH. Option C protects against soil-side attack but not aggressive internal chemistry. Option D is immune to chlorides and organic acids at this temperature and removes galvanic risk entirely.

A: Option A spreads total yield too evenly and ignores peak generation behaviour. Option B still underestimates by missing the early-life acceleration of methanogenesis. Option C is closer but drops the typical peak-to-average ratio used in flare sizing. Option D converts total yield to annual average then applies a realistic peak factor, landing near a thousand cubic metres per hour.

A: Option A is mitigated by correctly sized vent panels relieving pressure. Option B misunderstands vents as suppression rather than relief devices. Option C is a separate ignition source issue not addressed by venting. Option D remains because vents don't stop flame fronts without fast-acting isolation.