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dc.contributor.authorAhmad, Muhammad
dc.contributor.authorLiu, Sitong
dc.contributor.authorMahmood, Nasir
dc.contributor.authorMahmood, Asif
dc.contributor.authorAli, Muhammad
dc.contributor.authorZheng, Maosheng
dc.contributor.authorNi, Jinren
dc.date.accessioned2017-03-20T08:46:08Z
dc.date.available2017-03-20T08:46:08Z
dc.date.issued2017-03-15
dc.identifier.citationAhmad M, Liu S, Mahmood N, Mahmood A, Ali M, et al. (2017) Effects of porous carrier size on biofilm development, microbial distribution and nitrogen removal in microaerobic bioreactors. Bioresource Technology. Available: http://dx.doi.org/10.1016/j.biortech.2017.03.076.
dc.identifier.issn0960-8524
dc.identifier.doi10.1016/j.biortech.2017.03.076
dc.identifier.urihttp://hdl.handle.net/10754/623035
dc.description.abstractIn this study, effects of porous carrier’s size (polyurethane-based) on microbial characteristics were systematically investigated in addition to nitrogen removal performance in six microaerobic bioreactors. Among different sized carriers (50, 30, 20, 15,10, 5 mm), 15 mm carrier showed highest nitrogen removal (98%) due to optimal micro-environments created for aerobic nitrifiers in outer layer (0∼7 mm), nitrifiers and denitrifiers in middle layer (7∼10 mm) and anaerobic denitrifiers in inner layer (10∼15 mm). Candidatus brocadia, a dominant anammox bacteria, was solely concentrated close to centroid (0∼70 μm) and strongly co-aggregated with other bacterial communities in the middle layer of the carrier. Contrarily, carriers with a smaller (<15 mm) or larger size (>15 mm) either destroy the effective zone for anaerobic denitrifiers or damage the microaerobic environments due to poor mass transfer. This study is of particular use for optimal design of carriers in enhancing simultaneous nitrification-denitrification in microaerobic wastewater treatment processes.
dc.description.sponsorshipThe authors highly appreciate the National Science Foundation of China (NO. 51539001) for providing financial support for this study.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0960852417303486
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Bioresource Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology, [, , (2017-03-15)] DOI: 10.1016/j.biortech.2017.03.076 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCarrier size
dc.subjectMicrobial distribution
dc.subjectSimultaneous nitrification and denitrification
dc.subjectCandidatus brocadia
dc.subjectCo-aggregation
dc.subjectWastewater treatment
dc.titleEffects of porous carrier size on biofilm development, microbial distribution and nitrogen removal in microaerobic bioreactors
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalBioresource Technology
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Environmental Engineering, Peking University; Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
dc.contributor.institutionKey Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
dc.contributor.institutionDepartment of Physics, South University of Sciences and Technology, Shenzhen, PR China
dc.contributor.institutionResources and Environmental Research Academy, North China Electric Power University, Beijing, China
kaust.personAli, Muhammad
refterms.dateFOA2019-03-15T00:00:00Z
dc.date.published-online2017-03-15
dc.date.published-print2017-06


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