{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/45534"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/45534","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Mechanisms of MS2 bacteriophage removal by ultrafiltration membrane with different foulants","abstract":"An ultrafiltration unit with a polyvinylidene fluoride (PVDF) membrane of 40 nm nominal pore size was used to study bacteriophage MS2 removal under different membrane conditions. The membrane conditions were subject to fouling of soluble microbial products (SMP), which was extracted from membrane bio-reactor (MBR) feed water, and cleaning methods including backwashing and chemical cleaning. The membrane conditions tested were pristine membrane, membrane fouled by SMP, backwashed membrane, and chemically cleaned membrane. The order of MS2 removal by these membranes was: fouled membrane > backwashed membrane > chemically cleaned membrane ≈ pristine membrane. A linear correlation between membrane relative permeability and MS2 removal was found. MS2 mass balance analysis for the ultrafiltration unit showed a higher percentage of MS2 in the concentrate for the fouled membrane compared to that for the pristine membrane. Quartz crystal microbalance (QCM) results showed faster kinetics of MS2 adhesion to the pristine membrane compared to the SMP-fouled membrane. In agreement with QCM results, an attractive force between MS2 and the pristine membrane was detected using an atomic force microscope (AFM), while a repulsive force was detected for the interaction between MS2 and the fouled membrane. The presence of SMP on the membrane surface led to higher rejection of MS2 due to both pore blocking and repulsion between MS2 and the SMP layer. Chemical cleaning removed most of the SMP foulant and as a result led to a lower MS2 removal.","abstract_html":"An ultrafiltration unit with a polyvinylidene fluoride (PVDF) membrane of 40 nm nominal pore size was used to study bacteriophage MS2 removal under different membrane conditions. The membrane conditions were subject to fouling of soluble microbial products (SMP), which was extracted from membrane bio-reactor (MBR) feed water, and cleaning methods including backwashing and chemical cleaning. The membrane conditions tested were pristine membrane, membrane fouled by SMP, backwashed membrane, and chemically cleaned membrane. The order of MS2 removal by these membranes was: fouled membrane > backwashed membrane > chemically cleaned membrane ≈ pristine membrane. A linear correlation between membrane relative permeability and MS2 removal was found. MS2 mass balance analysis for the ultrafiltration unit showed a higher percentage of MS2 in the concentrate for the fouled membrane compared to that for the pristine membrane. Quartz crystal microbalance (QCM) results showed faster kinetics of MS2 adhesion to the pristine membrane compared to the SMP-fouled membrane. In agreement with QCM results, an attractive force between MS2 and the pristine membrane was detected using an atomic force microscope (AFM), while a repulsive force was detected for the interaction between MS2 and the fouled membrane. The presence of SMP on the membrane surface led to higher rejection of MS2 due to both pore blocking and repulsion between MS2 and the SMP layer. Chemical cleaning removed most of the SMP foulant and as a result led to a lower MS2 removal.","abstract_has_math":false,"creators":["Lu, Ruiqing"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Environ Engr in Civil Engr","degree_department":null,"school":null,"contributors":["Nguyen, Thanh H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-08-22T16:46:54Z","date_published":"2013-08-22T16:46:54Z","updated_at":"2026-07-22T22:25:36Z","subjects":["Ultrafiltration","MS2","backwash","chemical cleaning"],"languages":["en"],"rights":["Copyright 2013 Ruiqing Lu"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/45534","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Nguyen, Thanh H."]},{"key":"dc:creator","label":"Author","values":["Lu, Ruiqing"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2013-08-22T16:46:54Z","2015-08-22T10:00:34Z","2013-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Environ Engr in Civil Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["Ultrafiltration","MS2","backwash","chemical cleaning"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2013 Ruiqing Lu"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/45534"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["An ultrafiltration unit with a polyvinylidene fluoride (PVDF) membrane of 40 nm nominal pore size was used to study bacteriophage MS2 removal under different membrane conditions. The membrane conditions were subject to fouling of soluble microbial products (SMP), which was extracted from membrane bio-reactor (MBR) feed water, and cleaning methods including backwashing and chemical cleaning. The membrane conditions tested were pristine membrane, membrane fouled by SMP, backwashed membrane, and chemically cleaned membrane. The order of MS2 removal by these membranes was: fouled membrane > backwashed membrane > chemically cleaned membrane ≈ pristine membrane. A linear correlation between membrane relative permeability and MS2 removal was found. MS2 mass balance analysis for the ultrafiltration unit showed a higher percentage of MS2 in the concentrate for the fouled membrane compared to that for the pristine membrane. Quartz crystal microbalance (QCM) results showed faster kinetics of MS2 adhesion to the pristine membrane compared to the SMP-fouled membrane. In agreement with QCM results, an attractive force between MS2 and the pristine membrane was detected using an atomic force microscope (AFM), while a repulsive force was detected for the interaction between MS2 and the fouled membrane. The presence of SMP on the membrane surface led to higher rejection of MS2 due to both pore blocking and repulsion between MS2 and the SMP layer. Chemical cleaning removed most of the SMP foulant and as a result led to a lower MS2 removal.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-07-19T19:29:16Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Lu_Ruiqing.docx: 1789723 bytes, checksum: ed29b02e53086cc87a4164965c66be81 (MD5) Lu_Ruiqing.pdf: 1102454 bytes, checksum: 3831e3826ff0c640fe06d0155f497792 (MD5)","Made available in DSpace on 2013-08-22T16:46:54Z (GMT). No. of bitstreams: 3 Ruiqing_Lu.pdf: 1102410 bytes, checksum: 93b0e914dc8149bb5a67472a478e5b78 (MD5) Lu_Ruiqing.docx: 1789723 bytes, checksum: ed29b02e53086cc87a4164965c66be81 (MD5) license.txt: 4056 bytes, checksum: 20bf561d8c558f36825d4e352c1d55b3 (MD5)","Restriction data tranferred 2014-07-01T11:20:32-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-08-22 11:49:27 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (srobbins@illinois.edu) on 2013-08-22T16:49:30Z Item is restricted until 2015-08-22T16:49:27Z","U of I Only Restriction Lifted for Item 45516 on 2015-08-22T10:00:34Z."]},{"key":"dc:title","label":"Title","values":["Mechanisms of MS2 bacteriophage removal by ultrafiltration membrane with different foulants"]}]}],"canonical_facts":{"dc:contributor":["Nguyen, Thanh H."],"dc:creator":["Lu, Ruiqing"],"dc:date":["2013-08-22T16:46:54Z","2015-08-22T10:00:34Z","2013-08"],"dc:description":["An ultrafiltration unit with a polyvinylidene fluoride (PVDF) membrane of 40 nm nominal pore size was used to study bacteriophage MS2 removal under different membrane conditions. The membrane conditions were subject to fouling of soluble microbial products (SMP), which was extracted from membrane bio-reactor (MBR) feed water, and cleaning methods including backwashing and chemical cleaning. The membrane conditions tested were pristine membrane, membrane fouled by SMP, backwashed membrane, and chemically cleaned membrane. The order of MS2 removal by these membranes was: fouled membrane > backwashed membrane > chemically cleaned membrane ≈ pristine membrane. A linear correlation between membrane relative permeability and MS2 removal was found. MS2 mass balance analysis for the ultrafiltration unit showed a higher percentage of MS2 in the concentrate for the fouled membrane compared to that for the pristine membrane. Quartz crystal microbalance (QCM) results showed faster kinetics of MS2 adhesion to the pristine membrane compared to the SMP-fouled membrane. In agreement with QCM results, an attractive force between MS2 and the pristine membrane was detected using an atomic force microscope (AFM), while a repulsive force was detected for the interaction between MS2 and the fouled membrane. The presence of SMP on the membrane surface led to higher rejection of MS2 due to both pore blocking and repulsion between MS2 and the SMP layer. Chemical cleaning removed most of the SMP foulant and as a result led to a lower MS2 removal.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-07-19T19:29:16Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Lu_Ruiqing.docx: 1789723 bytes, checksum: ed29b02e53086cc87a4164965c66be81 (MD5) Lu_Ruiqing.pdf: 1102454 bytes, checksum: 3831e3826ff0c640fe06d0155f497792 (MD5)","Made available in DSpace on 2013-08-22T16:46:54Z (GMT). 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