Virginia Polytechnic Institute and State University
Effect of the COD:TKN ratio and mean cell residence time on nitrogen removal in the completely mixed activated sludge process
Abstract
dc:description.abstractThe effect that the COD:TKN ratio had on total nitrogen removal efficiency. as well as, the effect on COD removal efficiency, nitrogen distribution in the effluent streams, and total system mixed liquor suspended solids concentrations in the activated sludge process as a function of the mean cell residence time (θ<sub>c</sub>) were examined in this investigation. A definite relationship was shown to exist between the influent COD:TKN ratio, mean cell residence time, and nitrogen removal efficiency by operating two bench scale activated sludge reactors under continuous feeding. Theoretical data, which were generated by applying biokinetic equations and stoichiometric relationships, were compared to laboratory obtained data to evaluate the validity of using stoichiometric relationships to establish design and operational criteria. The mean cell residence time was used as the control parameter in this investigation. It was demonstrated that nitrogen removal efficiency increased via waste sludge incorporation as θ<sub>c</sub> was decreased. It was also shown that nitrogen removal efficiency increased with an increase in the influent COD:TKN ratio by both experimental results and theoretical data. Optimum nitrogen removal efficiencies were found to occur at decreasing mean cell residence times and increasing COD:TKN ratios.
Degree
thesis:*- Name thesis:degree_name
- M.S.
- Level thesis:degree_level
- masters
- Discipline thesis:degree_discipline
- Sanitary Engineering
- Department dc:contributor.department
- Sanitary Engineering
- Grantor dc:publisher
- Virginia Polytechnic Institute and State University
- Year dc:date.issued
- 1983
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Hart, Gary M. (Gary Michael)
Rights
dc:rights- Statement dc:rights
-
- In Copyright
- Licence dc:rights.uri
- Language dc:language.iso
- en
Identifiers
dc:identifier.*- Handle dc:identifier.uri
- http://hdl.handle.net/10919/113489
- OAI identifier oai:identifier
- oai:vtechworks.lib.vt.edu:10919/113489