Evaluation of Odors Associated with Land Application of Biosolids

摘要

An odor study was performed at a biosolids application demonstration site using several different gas collection devices and analytical methods to determine changes in air concentration of several organic and inorganic compounds associated with biosolids application over various time periods. Various organic and inorganic odorants were detected at 1.5 m above the ground surface within the biosolids applica-tion zone area immediately after application. They then decreased to non-detectable levels within 196 h after application, consistent with other biosolids application studies. Air samples collected from flux chambers installed within the application zone contained detectable concentrations of various organic odorants immediately after biosolids appli-cation. The concentrations of these odorants may have been influenced by the in-creased temperature within the flux chambers, and the change in concentration of these odorants over time was affected by the various sample analysis method. Airborne con-centrations of ammonia and hydrogen sulfide rapidly decreased within 4 h after biosolids application, and they further decreased to non-detectable levels within 196 h after application. The highest measurements for both ammonia and hydrogen sulfide did not approach any health criterion or guidance levels for these compounds. The ef-fects of the specific biosolids process and management variables on odor generation were not studied.