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Effect of Amendment Addition on Biosolids Odors based on Gas Chromatography Analysis and Odor Panel Observations

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Odors from biosolids have become an important concern for utilities, especially during staging, storage and/or land application activities. A substantial amount of research has been performed in recent years to understand the compounds that cause odors and the mechanisms by which these compounds are produced. In addition, research has been performed to understand the factors that contribute to odorant production as well as methods to reduce odors. One area of study has been the use of chemical additives and amendments (A&As) that can be added to biosolids either during the conditioning and dewatering process or directly to the cake after dewatering (Higgins et al., Chen et al., Robinson etc). These studies have had mixed results, and additional research is needed to develop better practices to reduce odors from biosolids. The objectives of this study were two-fold:

to evaluate a series of A&As that can be added to biosolids for the purpose of odor reduction during staging, storage, and land application;


to perform a field trial to investigate the effect of inventory management on field odors as well as to correlate field data with laboratory data.


This is the first paper in a two-paper series that describes the results from these studies. This paper is focused on the first objective – the effect of chemical addition and amendment addition on odors.
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Keywords: Chemical additives and amendments (A&s); biosolids staging; biosolids storage; inventory management; land application; odorous volatile organic compounds (OVACs); total volatile organic sulfur compounds (TVOSCs)

Document Type: Research Article

Publication date: 2009-01-01

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