Comparing the responses of nitrifiers to differing ammonia loadings
Anderson, Blake W.
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https://hdl.handle.net/2142/18259
Description
Title
Comparing the responses of nitrifiers to differing ammonia loadings
Author(s)
Anderson, Blake W.
Issue Date
2011-01-14T22:41:54Z
Director of Research (if dissertation) or Advisor (if thesis)
Morgenroth, Eberhard F.
Department of Study
Civil & Environmental Eng
Discipline
Environ Engr in Civil Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Nitrifier Modeling
Ammonia acclimation
Abstract
Return active sludge from the Danville Sanitary plant (Danville, IL) was fed 10 mg NH3-N/L per
cycle of separated swine manure to allow the biomass to adapt to a new influent in a sequencing batch
reactor. The biomass was then separated into three reactors. A control reactor was exposed to 10 mg
NH3-N/L . A medium stress reactor was exposed to ammonia loading increasing from 10 mg NH3-N/L to
120 mg NH3-N/L. A final high stress reactor was exposed to the same increasing loading as the medium
stress reactor with periodic shock loads. Biomass was regularly taken from each reactor and batch
respirometer tests were performed with initial ammonia loading varying from 20 mg NH3-N/L to 550 mg
NH3-N/L. Modifications to Activated Sludge Model 3 (ASM3) were used to attempt to model the OUR
curves generated, but the curves could not be fitted. Despite the inability to model the OUR curves, the
biomass from each reactor was found to have qualitatively different OUR curves from each other.
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