{"id":{"repo_id":"carleton","oai_identifier":"oai:carleton.scholaris.ca:20.500.14718/40026"},"canonical_url":"https://search.dev.ndltd.org/etd/carleton/oai:carleton.scholaris.ca:20.500.14718/40026","repository":{"repo_id":"carleton","name":"Carleton University","base_url":"https://carleton.scholaris.ca/server/oai/request"},"display":{"title":"Utilization of Ultraviolet-Visible Spectroscopy and Rheology for Sludge Characterization and Monitoring","abstract":"Operation of sludge treatment processes mainly relies on manual control, which is far from ideal. There is a need for new approaches to optimize the design and operation of sludge treatment processes and wastewater plants. This research aims to identify new tools and methods that can be used for in-line and real-time characterization and monitoring of sludge. Two methods that were examined in this thesis that have potential to be used as monitoring technologies were ultraviolet/visible spectrophotometry and torque rheology. Effluent and filtrate absorbance measurements in the ultraviolet/visible range were successful in monitoring the progress of aerobic digestion. Torque rheology was not found to be sensitive enough for monitoring aerobic digestion of sludge. Torque rheology detected significant changes in anaerobically digested sludge when trivalent cations were added, but not when divalent cations were added.","abstract_html":"Operation of sludge treatment processes mainly relies on manual control, which is far from ideal. There is a need for new approaches to optimize the design and operation of sludge treatment processes and wastewater plants. This research aims to identify new tools and methods that can be used for in-line and real-time characterization and monitoring of sludge. Two methods that were examined in this thesis that have potential to be used as monitoring technologies were ultraviolet/visible spectrophotometry and torque rheology. Effluent and filtrate absorbance measurements in the ultraviolet/visible range were successful in monitoring the progress of aerobic digestion. Torque rheology was not found to be sensitive enough for monitoring aerobic digestion of sludge. Torque rheology detected significant changes in anaerobically digested sludge when trivalent cations were added, but not when divalent cations were added.","abstract_has_math":false,"creators":["Smyth, Jordan"],"institution":"Carleton University","degree_name":"Master of Applied Science (M.App.Sc.)","degree_level":"Master's","degree_discipline":"Engineering, Environmental","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018","date_published":"2018","updated_at":"2026-07-24T01:34:22Z","subjects":[],"languages":["en"],"rights":["Copyright © 2018 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. 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There is a need for new approaches to optimize the design and operation of sludge treatment processes and wastewater plants. This research aims to identify new tools and methods that can be used for in-line and real-time characterization and monitoring of sludge. Two methods that were examined in this thesis that have potential to be used as monitoring technologies were ultraviolet/visible spectrophotometry and torque rheology. Effluent and filtrate absorbance measurements in the ultraviolet/visible range were successful in monitoring the progress of aerobic digestion. Torque rheology was not found to be sensitive enough for monitoring aerobic digestion of sludge. Torque rheology detected significant changes in anaerobically digested sludge when trivalent cations were added, but not when divalent cations were added."]},{"key":"dc:title","label":"Title","values":["Utilization of Ultraviolet-Visible Spectroscopy and Rheology for Sludge Characterization and Monitoring"]}]}],"canonical_facts":{"dc:creator":["Smyth, Jordan"],"dc:date.accessioned":["2025-04-08T19:52:49Z"],"dc:date.available":["2025-04-08T19:52:49Z"],"dc:date.issued":["2018"],"dc:description.abstract":["Operation of sludge treatment processes mainly relies on manual control, which is far from ideal. There is a need for new approaches to optimize the design and operation of sludge treatment processes and wastewater plants. This research aims to identify new tools and methods that can be used for in-line and real-time characterization and monitoring of sludge. Two methods that were examined in this thesis that have potential to be used as monitoring technologies were ultraviolet/visible spectrophotometry and torque rheology. Effluent and filtrate absorbance measurements in the ultraviolet/visible range were successful in monitoring the progress of aerobic digestion. Torque rheology was not found to be sensitive enough for monitoring aerobic digestion of sludge. Torque rheology detected significant changes in anaerobically digested sludge when trivalent cations were added, but not when divalent cations were added."],"dc:identifier.doi":["10.22215/etd/2018-12942"],"dc:identifier.uri":["https://hdl.handle.net/20.500.14718/40026"],"dc:language.iso":["en"],"dc:publisher":["Carleton University"],"dc:rights":["Copyright © 2018 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. 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