{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/21794"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/21794","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Simultaneous modeling of competitive adsorption and dual substrate biodegradation in completely mixed GAC reactors","abstract":"Made available in DSpace on 2011-05-07T13:19:20Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026336.pdf: 6192128 bytes, checksum: 9f3389bab074a21c068cb45633bdb7ac (MD5) Previous issue date: 1990","abstract_html":"Made available in DSpace on 2011-05-07T13:19:20Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026336.pdf: 6192128 bytes, checksum: 9f3389bab074a21c068cb45633bdb7ac (MD5) Previous issue date: 1990","abstract_has_math":false,"creators":["Traegner, Ulrich Karl"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Suidan, Makram T."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:19:20Z","date_published":"2011-05-07T13:19:20Z","updated_at":"2026-07-22T22:25:18Z","subjects":["Engineering, Civil"],"languages":["eng"],"rights":["Copyright 1990 Traegner, Ulrich Karl"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9026336","(UMI)AAI9026336"],"render_values":[{"text":"AAI9026336","href":null,"code":true},{"text":"(UMI)AAI9026336","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/21794","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Suidan, Makram T."]},{"key":"dc:creator","label":"Author","values":["Traegner, Ulrich Karl"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:19:20Z","10000-01-01","1990"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Civil"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1990 Traegner, Ulrich Karl"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9026336","(UMI)AAI9026336","http://hdl.handle.net/2142/21794"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Made available in DSpace on 2011-05-07T13:19:20Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026336.pdf: 6192128 bytes, checksum: 9f3389bab074a21c068cb45633bdb7ac (MD5) Previous issue date: 1990","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:53:15Z Item is restricted indefinitely.","The fluidized-bed anaerobic GAC reactor, operating with GAC replacement, has been demonstrated to promote effective treatment of high strength industrial wastewaters which contain refractory and toxic chemicals that resist biodegradation and inhibit the fermentation of the biodegradable constituents of a wastewater.","The objective of this study was, to develop a mathematical model, capable of predicting the steady-state and transient performance of three fluidized-bed anaerobic GAC reactors treating synthetic wastewaters consisting of the readily biodegradable acetate, the biodegradable, adsorbable, but self-inhibitory phenol, and the non-biodegradable, inhibitory but adsorbable o-cresol. These reactors were operated with different GAC mean solids residence times, varying from 8 days to 60 days.","Special features of the activated carbon mixed-culture biofilm model include: diffusional mass transport across a concentration boundary layer and within the biofilm, and the distinction between two microbial species, namely the phenol and the acetate utilizing microorganisms, which compete for attachment surface and spatial occupation within the limited space of the biofilm. Transport of phenol and o-cresol within the GAC particle was modeled using competitive adsorption and the homogeneous surface diffusion model. The model furthermore incorporated the effects of inhibition of phenol degradation by o-cresol, and biomass loss by shearing.","Equilibrium and kinetic parameters in this model were obtained from independent isotherm and closed batch adsorption experiments. Biokinetic constants were determined from closed batch experiments using fermenter effluent as a source for microorganisms.","The model predictions were in good agreement with the experimental data for the full range of operational conditions of the anaerobic reactors. In this study it was found that the overall first-order shear loss coefficient can not be assumed constant, but varies with the degree of biomass coverage of the carbon particles. This finding was supported by experimental results of biological activity measurements on the active biomass. Since no a priori distribution was assigned for the two microbial species present in the biofilm, the composition within the biofilm changed for each steady-state of operation. The non-uniform species distribution of the microorganisms resulted in preferential shearing of one microbial group over another. This differential shear was verified experimentally.","Restriction data tranferred 2014-07-01T11:24:36-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Simultaneous modeling of competitive adsorption and dual substrate biodegradation in completely mixed GAC reactors"]}]}],"canonical_facts":{"dc:contributor":["Suidan, Makram T."],"dc:creator":["Traegner, Ulrich Karl"],"dc:date":["2011-05-07T13:19:20Z","10000-01-01","1990"],"dc:description":["Made available in DSpace on 2011-05-07T13:19:20Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026336.pdf: 6192128 bytes, checksum: 9f3389bab074a21c068cb45633bdb7ac (MD5) Previous issue date: 1990","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:53:15Z Item is restricted indefinitely.","The fluidized-bed anaerobic GAC reactor, operating with GAC replacement, has been demonstrated to promote effective treatment of high strength industrial wastewaters which contain refractory and toxic chemicals that resist biodegradation and inhibit the fermentation of the biodegradable constituents of a wastewater.","The objective of this study was, to develop a mathematical model, capable of predicting the steady-state and transient performance of three fluidized-bed anaerobic GAC reactors treating synthetic wastewaters consisting of the readily biodegradable acetate, the biodegradable, adsorbable, but self-inhibitory phenol, and the non-biodegradable, inhibitory but adsorbable o-cresol. These reactors were operated with different GAC mean solids residence times, varying from 8 days to 60 days.","Special features of the activated carbon mixed-culture biofilm model include: diffusional mass transport across a concentration boundary layer and within the biofilm, and the distinction between two microbial species, namely the phenol and the acetate utilizing microorganisms, which compete for attachment surface and spatial occupation within the limited space of the biofilm. Transport of phenol and o-cresol within the GAC particle was modeled using competitive adsorption and the homogeneous surface diffusion model. The model furthermore incorporated the effects of inhibition of phenol degradation by o-cresol, and biomass loss by shearing.","Equilibrium and kinetic parameters in this model were obtained from independent isotherm and closed batch adsorption experiments. Biokinetic constants were determined from closed batch experiments using fermenter effluent as a source for microorganisms.","The model predictions were in good agreement with the experimental data for the full range of operational conditions of the anaerobic reactors. In this study it was found that the overall first-order shear loss coefficient can not be assumed constant, but varies with the degree of biomass coverage of the carbon particles. This finding was supported by experimental results of biological activity measurements on the active biomass. Since no a priori distribution was assigned for the two microbial species present in the biofilm, the composition within the biofilm changed for each steady-state of operation. The non-uniform species distribution of the microorganisms resulted in preferential shearing of one microbial group over another. This differential shear was verified experimentally.","Restriction data tranferred 2014-07-01T11:24:36-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9026336","(UMI)AAI9026336","http://hdl.handle.net/2142/21794"],"dc:language":["eng"],"dc:rights":["Copyright 1990 Traegner, Ulrich Karl"],"dc:subject":["Engineering, Civil"],"dc:title":["Simultaneous modeling of competitive adsorption and dual substrate biodegradation in completely mixed GAC reactors"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:18Z"}