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dc.contributor.authorMedina, Sandra Constanza
dc.contributor.authorZamora-Vacca, Nataly
dc.contributor.authorLuna, Hector J.
dc.contributor.authorRatkovich, Nicolas
dc.contributor.authorRodríguez Susa, Manuel
dc.date.accessioned2020-11-03T12:04:45Z
dc.date.available2020-11-03T12:04:45Z
dc.date.issued2020-10-30
dc.date.submitted2020-08-08
dc.identifier.citationMedina, S. C., Zamora-Vacca, N., Luna, H. J., Ratkovich, N., & Rodríguez Susa, M. (2020). SMP Production in an Anaerobic Submerged Membrane Bioreactor (AnMBR) at Different Organic Loading Rates. Membranes, 10(11), 317. doi:10.3390/membranes10110317
dc.identifier.issn2077-0375
dc.identifier.doi10.3390/membranes10110317
dc.identifier.urihttp://hdl.handle.net/10754/665788
dc.description.abstractAnaerobic membrane bioreactors (AnMBRs) have demonstrated an excellent capability to treat domestic wastewater. However, biofouling reduces membrane permeability, increasing operational costs and overall energy demand. Soluble microbial products (SMPs) that build up on the membrane surface play a significant role in the biofouling. In this study, the production of SMPs in a 32 L submerged AnMBR operated at three different organic loads (3.0, 4.1 and 1.2 kg chemical oxygen demand (COD)/m3d for phases 1, 2 and 3, respectively) during long-term operation of the reactor (144, 83 and 94 days) were evaluated. The samples were taken from both the permeate and the sludge at three different heights (0.14, 0.44 and 0.75 m). Higher production of SMPs was obtained in phase 2, which was proportional to the membrane fouling. There were no statistically significant differences (p > 0.05) in the SMPs extracted from sludge at different heights among the three phases. In the permeate of phases 1, 2 and 3, the membrane allowed the removal of 56%, 70% and 64% of the SMP concentration in the sludge. SMPs were characterized by molecular weight (MW). A bimodal behavior was obtained, where fractions prevailed with an MW < 1 kDa, associated with SMPs as utilization-associated products (UAPs) caused fouling by the pore-blocking mechanism. The chemical analysis found that, in the SMPs, the unknown COD predominated over the known COD, such as carbohydrates and proteins. These results suggest that further studies in SMP characterization should focus on the unknown COD fraction to understand the membrane fouling in AnMBR systems better.
dc.description.sponsorshipThe Colciencias Science, Technology, and Innovation Administrative Department supported this project within the Young Researchers and Innovators program. This support is gratefully acknowledged. We would also like to thank the Universidad de Los Andes Environmental Engineering Research Center—CIIA.
dc.description.sponsorshipThis research received no external funding.
dc.publisherMDPI AG
dc.relation.urlhttps://www.mdpi.com/2077-0375/10/11/317
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleSMP Production in an Anaerobic Submerged Membrane Bioreactor (AnMBR) at Different Organic Loading Rates
dc.typeArticle
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalMembranes
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionEnvironmental Engineering Research Center (CIIA), Department of Civil and Environmental Engineering, Universidad de Los Andes, Cra. 1 #18a 12, Bogotá 111711, Colombia.
dc.contributor.institutionEscuela de Ciencias, Agrícolas, Pecuarias y del Medio Ambiente, Universidad Nacional Abierta y a Distancia, Calle 14 Sur # 23 - 14, Bogotá 551015, Colombia.
dc.contributor.institutionFacultad de Ingeniería Ambiental, Universidad Antonio Nariño, Calle 22 Sur # 12D - 81, Bogotá 111511, Colombia.
dc.contributor.institutionDepartment of Chemical and Food Engineering, School of Engineering, Universidad de Los Andes, Bogotá 111711, Colombia.
dc.identifier.volume10
dc.identifier.issue11
dc.identifier.pages317
kaust.personMedina, Sandra Constanza
dc.date.accepted2020-09-18
refterms.dateFOA2020-11-03T12:05:28Z


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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.