Heterogeneous diffusion in aerobic granular sludge

dc.contributor.authorvan den Berg, Lenno
dc.contributor.authorKirkland, Catherine M.
dc.contributor.authorSeymour, Joseph D.
dc.contributor.authorCodd, Sarah L.
dc.contributor.authorVan Loosdrecht, Mark C. M.
dc.contributor.authorde Kreuk, Merle K.
dc.date.accessioned2022-05-16T19:04:33Z
dc.date.available2022-05-16T19:04:33Z
dc.date.issued2020-08
dc.description.abstractAerobic granular sludge (AGS) technology allows simultaneous nitrogen, phosphorus, and carbon removal in compact wastewater treatment processes. To operate, design, and model AGS reactors, it is essential to properly understand the diffusive transport within the granules. In this study, diffusive mass transfer within full‐scale and lab‐scale AGS was characterized with nuclear magnetic resonance (NMR) methods. Self‐diffusion coefficients of water inside the granules were determined with pulsed‐field gradient NMR, while the granule structure was visualized with NMR imaging. A reaction‐diffusion granule‐scale model was set up to evaluate the impact of heterogeneous diffusion on granule performance. The self‐diffusion coefficient of water in AGS was ∼70% of the self‐diffusion coefficient of free water. There was no significant difference between self‐diffusion in AGS from full‐scale treatment plants and from lab‐scale reactors. The results of the model showed that diffusional heterogeneity did not lead to a major change of flux into the granule (<1%). This study shows that differences between granular sludges and heterogeneity within granules have little impact on the kinetic properties of AGS. Thus, a relatively simple approach is sufficient to describe mass transport by diffusion into the granules.en_US
dc.identifier.citationvThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.an den Berg, L., Kirkland, C. M., Seymour, J. D., Codd, S. L., van Loosdrecht, M. C., & de Kreuk, M. K. (2020). Heterogeneous diffusion in aerobic granular sludge. Biotechnology and bioengineering, 117(12), 3809-3819.en_US
dc.identifier.issn0006-3592
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/16785
dc.language.isoen_USen_US
dc.publisherWileyen_US
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleHeterogeneous diffusion in aerobic granular sludgeen_US
dc.typeArticleen_US
mus.citation.extentfirstpage3809en_US
mus.citation.extentlastpage3819en_US
mus.citation.journaltitleBiotechnology and Bioengineeringen_US
mus.citation.volume117en_US
mus.data.thumbpage4en_US
mus.identifier.doi10.1002/bit.27522en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentCivil Engineering.en_US
mus.relation.departmentMechanical & Industrial Engineering.en_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US

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