Absorb It, React With It, or Burn It: Three Ways to Fight an Industrial Smell
Industrial odour control sorts roughly into three families: systems that absorb odours, systems that convert them into something less smelly through a chemical reaction, and systems that burn them away.
Experts on fixing industrial odours say the best of these technologies, used correctly, can remove 90% or more of the target compounds responsible for a smell. That kind of kit is expensive, though, and some operators choose simpler, cheaper options — masking odours from landfill or sewage processing by spraying giant quantities of deodorisers.
Odour experts were dubious about the effectiveness of those industrial-scale air fresheners. Consultant Micheal Bull is blunter than most, likening them to fabric conditioner.
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The interesting shift is attribution. Before Des Moines installed monitors, officials drove out to the source of a complaint to sniff the air. Sensors turn "something smells" into a number with an address attached.
A number isn't a remedy, though. Milpitas has an odour problem, residents there have endured rank smells from industrial sites including a 342-acre landfill for decades, and the community's hopes are pinned on technology — which rather suggests the smell is still around to be monitored.
The fabric-conditioner line earns its keep. Fabric conditioner doesn't remove a smell; it argues with it. Calling an industrial deodoriser one is a polite way of saying the odour is still in the room, just outnumbered.