IN–VESSEL PROCESSING OF SPENT MUSHROOM SUBSTRATE FOR ODOR CONTROL
2003
Spent mushroom substrate (SMS) was processed in an aerated floor vessel and compared to SMS processed by
conventional windrow methodology. The aerated floor vessel design provided portability and ease of use. Three trials were
run using SMS obtained directly from commercial mushroom production operations. Temperature and oxygen levels in the
aerated and windrow SMS were monitored regularly. Odors were assessed on a weekly or bi–weekly schedule, both
olfactometrically using human panels and quantitatively using gas chromatography with flame photometric detection
(GC/FPD). Olfactometric assessment showed that the odors were significantly reduced by aeration in terms of intensity and
pleasantness ratings. GC/FPD assessments also demonstrated that aeration consistently reduced sulfur compound levels.
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