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First-principles oxygen budget for a sealed grain store (trapped void and headspace air, bag permeation, grain and insect respiration) deriving a sizing rule for iron-based oxygen-scavenger sachets: 1,087 g per tonne upfront plus 14.2 g per tonne per month at 25 C, with temperature-dependent margins, holding oxygen below the 3% insect-lethal threshold for the full storage period. Model results are simulated, not measured.
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William Alexander Aldred (2026) studied this question.
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