INFLUENCE OF STAGING, MEAN CELL RESIDENCE TIME, AND THERMOPHILIC TEMPERATURE ON THE THERMOPHILIC ANAEROBIC DIGESTION PROCESS
Abstract:As Class B biosolids land application has become less acceptable to many local jurisdictions, low cost processes to achieve Class A have become more popular. Prominent among these low cost processes is thermophilic anaerobic digestion. As a result, thermophilic anaerobic digestion is now a popular topic in the wastewater treatment literature, but quantifiable methods for selecting a particular thermophilic process have not been offered. To provide for this need, an empirical model was developed from data collected in our thermophilic anaerobic digestion studies conducted over the last six years. The model predicts at what thermophilic temperature and mean cell residence time one process will outperform or equal another. Data from our studies also show an apparent relationship between increased thermophilic temperatures and increased odors based on higher volatile acids production, and increased temperatures and volatile solids destruction.
Document Type: Research Article
Publication date: 2004-01-01
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