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Factors Contributing to Trimethylamine Generation from Limed and Polymer Conditioned Sludges

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Trimethylamine (TMA) odors are often associated with limed and polymer conditioned sludges. This odor has a fishy smell and can be a nuisance to the community surrounding a wastewater treatment plant or land application site. Several factors are thought to determine the amount of TMA generated from limed biosolids. These are, the presence of cationic polymer, the polymer dose, the time between addition of polymer and addition of lime, shear and dewatered cake solids concentration. All of these were investigated in this study. The results showed that TMA could be generated from sludges that did not contain polymer but the concentrations were low compared to sludges conditioned with cationic polymer. As the polymer dose increased, the TMA increased. However, the most important factor in generating TMA was the tine between conditioning and liming. If this time was minimized, little TMA was produced, even at high polymer doses.
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Document Type: Research Article

Publication date: 2006-01-01

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