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dc.contributor.authorJuntawang, Chaipon
dc.description.abstractMembrane bioreactors (MBRs) have been a process of choice for wastewater treatment and reuse because of several advantages over conventional process (activated sludge) including superior quality effluent, less biomass yields and more compact design. However, membrane fouling is a major drawback that hampers widespread and full-scale applications of MBRs. Cell entrapment is a relatively new wastewater treatment process. It involves cells artificially entrapped in a porous polymer matrix. In this dissertation research, three versions of entrapped cells-based MBR processes, aerobic MBR, anaerobic MBR and anaerobic forward osmosis (FO) MBR, were developed by using polyvinyl alcohol as a cell entrapment matrix. Their domestic wastewater treatment performances and fouling characteristics were tested and compared with their suspended cells-based MBR counterparts. For aerobic and anaerobic MBRs, entrapped cells-based processes provided similar organic removal but experienced delayed fouling compared to suspended cells-based processes. The entrapment diminished bound extracellular polymeric substances (bEPS) and soluble microbial products (SMP), which are a main culprit of irreversible fouling through pore blocking. Entrapped cells-based aerobic and anaerobic processes had 5 and 8 times lower pore blocking resistance than corresponding suspended cells-based processes. For anaerobic FOMBR, the entrapment protected cells from reverse salt flux leading to slightly higher organic removal. Lower bEPS and SMP in entrapped cells-based FOMBR led to higher permeate flux compared to suspended cells-based FOMBR. The delayed membrane fouling in entrapped cells-based MBRs means lower costs associated with membrane cleaning processes and longer membrane lifespan. Another contribution of this study is novel knowledge on fouling conditions and mitigation for FOMBR, an emerging wastewater treatment process.en_US
dc.publisherNorth Dakota State Universityen_US
dc.rightsNDSU policy 190.6.2
dc.titleCell Entrapment for Mitigating Fouling in Membrane Bioreactors Treating Domestic Wastewateren_US
dc.typeDissertationen_US
dc.typeVideoen_US
dc.date.accessioned2016-10-06T15:31:57Z
dc.date.available2016-10-06T15:31:57Z
dc.date.issued2018
dc.identifier.urihttp://hdl.handle.net/10365/25836
dc.title.alternativeCell Entrapment as an Effective Way to Reduce Fouling in Membrane Bioreactor Treating Municipal Wastewateren_US
dc.identifier.orcid0000-0002-6111-9801
dc.description.sponsorshipRoyal Thai Governmenten_US
dc.rights.urihttps://www.ndsu.edu/fileadmin/policy/190.pdf
ndsu.degreeDoctor of Philosophy (PhD)en_US
ndsu.collegeGraduate and Interdisciplinary Studiesen_US
ndsu.departmentBiological Sciencesen_US
ndsu.programEnvironmental and Conservation Scienceen_US
ndsu.advisorKhan, Eakalak


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