Hydrolysis capacity of different sized granules in a full-scale aerobic granular sludge (AGS) reactor.
AGS, aerobic granular sludge
AS, activated sludge
Activity staining
Aerobic granular sludge
Biomass segregation
COD, chemical oxygen demand
EBPR, enhanced biological phosphorus removal
EPS, extracellular polymeric substances
FISH, fluorescence in situ hybridization
GAO, glycogen-accumulating organism
Hydrolysis
PAO, polyphosphate-accumulating organism
Polymeric substrates
SBR, sequencing batch reactor
SND, simultaneous nitrification-denitrification
SRT, solids retention time
TSS, total suspended solids
VFA, volatile fatty acid
VSS, volatile suspended solids
WWTP, wastewater treatment plant
Wastewater treatment
Journal
Water research X
ISSN: 2589-9147
Titre abrégé: Water Res X
Pays: England
ID NLM: 101742109
Informations de publication
Date de publication:
01 Aug 2022
01 Aug 2022
Historique:
received:
17
05
2022
revised:
27
07
2022
accepted:
30
07
2022
entrez:
15
8
2022
pubmed:
16
8
2022
medline:
16
8
2022
Statut:
epublish
Résumé
In aerobic granular sludge (AGS) reactors, granules of different sizes coexist in a single reactor. Their differences in settling behaviour cause stratification in the settled granule bed. In combination with substrate concentration gradients over the reactor height during the anaerobic plug-flow feeding regime, this can result in functional differences between granule sizes. In this study, we compared the hydrolytic activity in granules of 4 size ranges (between 0.5 and 4.8 mm diameter) collected from a full-scale AGS installation. Protease and amylase activities were quantified through fluorescent activity assays. To visualise where the hydrolytic active zones were located within the granules, the hydrolysis sites were visualized microscopically after incubating intact and sliced granules with fluorescent casein and starch. The microbial community was studied using fluorescent
Identifiants
pubmed: 35965888
doi: 10.1016/j.wroa.2022.100151
pii: S2589-9147(22)00021-4
pmc: PMC9364025
doi:
Types de publication
Journal Article
Langues
eng
Pagination
100151Informations de copyright
© 2022 The Authors. Published by Elsevier Ltd.
Déclaration de conflit d'intérêts
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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