Nitrogen removal and transformations during simulated soil aquifer treatment (SAT)
AuthorChipello, Peter Luke
AdvisorConklin, Martha H.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractNitrogen transformations were studied in 1-meter soil columns fed with primary, secondary, or nitrified-secondary effluents. The columns were packed with sand or sandy loam and operated on 7-day wet, 7-day dry cycles. Cumulative total nitrogen (TN) removals during application of secondary effluent or ozonated secondary effluent were 5% for sand and 38% for sandy loam columns. Significant TN removals were achieved using primary/nitrified-secondary effluent blends. Cumulative TN removal was 44% for three cycles of operation using a 50/50 blend of primary and nitrified-secondary effluent in sand. In a sandy loam column, cumulative TN removals were 32%, 54%, and 72% for primary/nitrified-secondary blend ratios of 25/75, 35/65 and 50/50, respectively. Assuming a mechanism of denitrification, the supply of carbon was estimated to be less than a third of what would be required to account for observed TN removals during application of primary/nitrified-secondary blends, suggesting the need to consider other possible nitrogen removal mechanisms.
Degree ProgramGraduate College
Hydrology and Water Resources