Are there odors associated with the use of biosolids, or with facilities which process biosolids into other products??
The short answer is yes, there are odors associated with even well run biosolids facilities. These odors are generated by the application and processing of biosolids, but when properly operated, such odors should not be long-lived nor at levels which would be a nuisance for adjacent property owners. The actual odors have been described as ‘musty”, or ‘earthy’, when describing the injection of liquid biosolids or the application of compost. Ammonia odors are associated with AASS or lime stabilized biosolids, often because the chemical reaction of the lime and the biosolids drives off the ammonia. Composting facilities will also have an earthy odor associated with them, and may sometimes smell like a wastewater treatment plant, depending upon the type of process used to compost the biosolids and the degree of air pollution control equipment installed at the facility. The odors associated with normal farm application of animal manure, especially when surface applied, are much worse than t
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