{"id":{"repo_id":"rice","oai_identifier":"oai:repository.rice.edu:1911/13627"},"canonical_url":"https://search.dev.ndltd.org/etd/rice/oai:repository.rice.edu:1911/13627","repository":{"repo_id":"rice","name":"Rice University","base_url":"https://repository.rice.edu/server/oai/request"},"display":{"title":"Nitrification and denitrification in the activated sludge process","abstract":"The characteristics of the single-sludge nitrification-denitrification process were investigated using influent organics as the carbon source and nitrate as an electron acceptor to see if any oxygen savings could be obtained. The key research tools used were mathematical modeling, computer simulation, the library, and discussions with experienced operating engineers. A mathematical model was obtained from the literature for the nitrification process. The summary of simulations using the model was that complete nitrification can be achieved at a temperature of 20$\\sp\\circ$C, with a dissolved oxygen concentration of 2 mg/l and a sludge age of 4-5 days. A mathematical model was developed for the single-sludge nitrification-denitrification process and the influence of denitrification on oxygen requirements was studied by simulation. The conclusion was that, depending on the COD/NH$\\sb4\\sp+$ ratio, savings in oxygen, by the use of nitrate as an electron acceptor are in the range of 3 to 8 percent.","abstract_html":"The characteristics of the single-sludge nitrification-denitrification process were investigated using influent organics as the carbon source and nitrate as an electron acceptor to see if any oxygen savings could be obtained. The key research tools used were mathematical modeling, computer simulation, the library, and discussions with experienced operating engineers. A mathematical model was obtained from the literature for the nitrification process. The summary of simulations using the model was that complete nitrification can be achieved at a temperature of 20$\\sp\\circ$C, with a dissolved oxygen concentration of 2 mg/l and a sludge age of 4-5 days. A mathematical model was developed for the single-sludge nitrification-denitrification process and the influence of denitrification on oxygen requirements was studied by simulation. The conclusion was that, depending on the COD/NH$\\sb4\\sp+$ ratio, savings in oxygen, by the use of nitrate as an electron acceptor are in the range of 3 to 8 percent.","abstract_has_math":true,"creators":["Idury, Radha Modukuri"],"institution":"Rice University","degree_name":"Master of Science","degree_level":"Masters","degree_discipline":"Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Andrews, John F."],"committee_chairs":[],"committee_members":[],"year":1992,"date_issued":"1992","date_published":"1992","updated_at":"2026-07-24T04:10:39Z","subjects":["Environmental science","Sanitary and municipal engineering"],"languages":["eng"],"rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1911/13627","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Andrews, John F."]},{"key":"dc:creator","label":"Author","values":["Idury, Radha Modukuri"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2009-06-04T00:27:34Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2009-06-04T00:27:34Z"]},{"key":"dc:date.issued","label":"Date","values":["1992"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Rice University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Environmental science","Sanitary and municipal engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1911/13627"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The characteristics of the single-sludge nitrification-denitrification process were investigated using influent organics as the carbon source and nitrate as an electron acceptor to see if any oxygen savings could be obtained. The key research tools used were mathematical modeling, computer simulation, the library, and discussions with experienced operating engineers. A mathematical model was obtained from the literature for the nitrification process. The summary of simulations using the model was that complete nitrification can be achieved at a temperature of 20$\\sp\\circ$C, with a dissolved oxygen concentration of 2 mg/l and a sludge age of 4-5 days. A mathematical model was developed for the single-sludge nitrification-denitrification process and the influence of denitrification on oxygen requirements was studied by simulation. The conclusion was that, depending on the COD/NH$\\sb4\\sp+$ ratio, savings in oxygen, by the use of nitrate as an electron acceptor are in the range of 3 to 8 percent."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Nitrification and denitrification in the activated sludge process"]}]}],"canonical_facts":{"dc:contributor.advisor":["Andrews, John F."],"dc:creator":["Idury, Radha Modukuri"],"dc:date.accessioned":["2009-06-04T00:27:34Z"],"dc:date.available":["2009-06-04T00:27:34Z"],"dc:date.issued":["1992"],"dc:description.abstract":["The characteristics of the single-sludge nitrification-denitrification process were investigated using influent organics as the carbon source and nitrate as an electron acceptor to see if any oxygen savings could be obtained. The key research tools used were mathematical modeling, computer simulation, the library, and discussions with experienced operating engineers. A mathematical model was obtained from the literature for the nitrification process. The summary of simulations using the model was that complete nitrification can be achieved at a temperature of 20$\\sp\\circ$C, with a dissolved oxygen concentration of 2 mg/l and a sludge age of 4-5 days. A mathematical model was developed for the single-sludge nitrification-denitrification process and the influence of denitrification on oxygen requirements was studied by simulation. The conclusion was that, depending on the COD/NH$\\sb4\\sp+$ ratio, savings in oxygen, by the use of nitrate as an electron acceptor are in the range of 3 to 8 percent."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/1911/13627"],"dc:language.iso":["eng"],"dc:rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"dc:subject":["Environmental science","Sanitary and municipal engineering"],"dc:title":["Nitrification and denitrification in the activated sludge process"],"dc:type":["Thesis"],"thesis:degree_discipline":["Engineering"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Rice University"]},"updated_at":"2026-07-24T04:10:39Z"}