Journal article
Improving nitrogen removal in an IFAS nitritation-anammox reactor treating lagoon supernatant by manipulating biocarrier filling ratio and hydraulic retention time
Biochemical engineering journal, Vol.152, 107365
15/12/2019
Metrics
15 Record Views
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Abstract
A lab-scale integrated fixed-film activated sludge sequencing batch reactor (IFAS-SBR) was established for a onestage nitritation-anammox process treating lagoon supernatant and optimized by altering both the biocarrier filling ratio and HRT for 500 days. The reactor's nitrogen removal rate increased slightly from 0.25 kg N m(-3) d(-1) to 0.29 kg N m(-3) d(-1) when biocarrier filling ratio was increased from 35% to 55% at a HRT of 2.5 d, and further increased to 0.46 kg N m(-3) d(-1) and 0.54 kg N m(-3) d(-1) when the HRT was reduced to 1.5 d and 1.2 d, respectively. Meanwhile, both NH4+-N and TN removal efficiencies increased from 81.8% and 74.8% to 95.2% and 87.4%, respectively, with the increased biocarrier filling ratio; however, they decreased slightly to 91.8% and 82.1% at HRT of 1.5 d and to 89.6% and 78.8% at HRT of 1.2 d, respectively. A distinct segregation of anammox bacteria and ammonium oxidizing bacteria (AOB) was achieved in the IFAS system and was highlighted by the decreased HRTs, which also contributed to the excellent nitrogen removal. The specific anammox activity was higher in biofilm than in suspended flocs, and vice versafor the specific AOB activity. The abundance of major microbial communities involved in this process were analyzed, which supported the observation of reactor performance changes. The present study provides critical knowledge for optimizing the one-stage IFAS nitritation-anammox reactor treating supernatant of anaerobically digested sludge thicken lagoon.
Details
- Title
- Improving nitrogen removal in an IFAS nitritation-anammox reactor treating lagoon supernatant by manipulating biocarrier filling ratio and hydraulic retention time
- Creators
- Sen Yang - University of AlbertaShengnan Xu - University of AlbertaAbdul Mohammed - EPCORNicholas J. Ashbolt - University of AlbertaYang Liu - University of Alberta
- Publication Details
- Biochemical engineering journal, Vol.152, 107365
- Publisher
- Elsevier
- Number of pages
- 8
- Grant note
- EPCOR Water Services Inc. Natural Sciences and Engineering Research Council of Canada (NSERC)
- Identifiers
- 991013097815802368
- Copyright
- © 2019 Elsevier B.V. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article