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Final Report
Quantifying the Emission Rate of Ammonia and Trimethyl Amine From Biosolids

For Bioset, Inc      .BioSurface Engineering Technologies, Inc.[BioSET]
November 30, 1999©
Bradley Striebig

While wastewater solids recycling is an accepted practice, it faces challenges of public acceptance. Biosolids products that meet federal and
state standards for reuse may not meet the test of public  acceptance due to odorous emissions. Methodologies to define and measure
wastewater solids and biosolids stability and odor characteristics have been lacking. The application of state-of-the art analytical techniques
has been applied to determine the composition of odorous gases emitted from untreated and lime-treated wastewater solids.

The research objective was to verify the emission of odorous compounds and estimate their emission rate. The chemical composition of
gaseous emissions from untreated and lime-treated wastewater solids were identified. Odors from the untreated wastewater solids were
dominated by
dimethyl disulfide, dimethyl sulfide, carbon disulfide and methanethiol. Odors from the lime-treated solids were dominated by
trimethylamine, ammonia, and dimethyl disulfide. Overall odor was not reduced, but in fact increased after the solids were exposed to lime and
increased temperature as indicated by the odor index defined herein.

For complete list of compounds in Table 1 with links to MSDS documents
click here