Journal article
Deciphering the role of granular activated carbon (GAC) in anammox: Effects on microbial succession and communication
Water research (Oxford), Vol.233, 119753
15/04/2023
PMID: 36841162
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Source: InCites
Abstract
Anaerobic ammonium oxidation (anammox) offered an energy-efficient option for nitrogen removal from wastewater. Granular activated carbon (GAC) addition has been reported that improved biomass immobilization, but the role of GAC in anammox reactors has not been sufficiently revealed. In this study, it was observed that GAC addition in an upflow anaerobic sludge blanket (UASB) reactor led to the significantly shortened anammox enrichment time (shortened by 45 days) than the reactor without GAC addition. The nitrogen removal rate was 0.83 kg N/m3/day versus 0.76 kg N/m3/day in GAC and non-GAC reactors, respectively after 255 days’ operation. Acyl-homoserine lactone (AHL) quorum sensing signal molecule C8-HSL had comparable concentrations in both anammox reactors, whereas the signal molecule C12-HSL was more pervasive in the reactor containing GAC than the reactor without GAC. Microbial analysis revealed distinct anammox development in both reactors, with Candidatus Brocadia predominant in the reactor that did not contain GAC, and Candidatus Kuenenia predominant in the reactor that contained GAC. Denitrification bacteria likely supported anammox metabolism in both reactors. The analyses of microbial functions suggested that AHL-dependent quorum sensing was enhanced with the addition of GAC, and that GAC possibly augmented the extracellular electron transfer (EET)-dependent anammox reaction.
Details
- Title
- Deciphering the role of granular activated carbon (GAC) in anammox: Effects on microbial succession and communication
- Creators
- Mengjiao Gao - University of AlbertaHongyu Dang - University of AlbertaXin Zou - University of AlbertaNajiaowa Yu - University of AlbertaHengbo Guo - University of AlbertaYiduo Yao - University of AlbertaYang Liu - University of Alberta
- Publication Details
- Water research (Oxford), Vol.233, 119753
- Grant note
- The authors acknowledge the financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) Alliance grant supported by the City of Calgary, Alberta Innovates, and Advancing Canadian Wastewater Assets (ACWA), the Canada Research Chair (CRC) in Future Water Services (Liu, Y.), and the China Scholarship Council (CSC) Ph.D. scholarship (Zou, X.)
- Identifiers
- 991013127413602368
- Copyright
- © 2023 Elsevier Ltd. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article