Combining continuous flow aerobic granulation using an external selector and carbon-efficient nutrient removal with AvN control in a full-scale simultaneous nitrification-denitrification process.
Aerobic granular sludge
AvN control
Denitrifying phosphorus accumulating organisms
Densification
Low dissolved oxygen
Journal
Water research
ISSN: 1879-2448
Titre abrégé: Water Res
Pays: England
ID NLM: 0105072
Informations de publication
Date de publication:
15 Feb 2022
15 Feb 2022
Historique:
received:
29
08
2021
revised:
25
11
2021
accepted:
18
12
2021
pubmed:
2
1
2022
medline:
27
1
2022
entrez:
1
1
2022
Statut:
ppublish
Résumé
The James R. Dolorio Water Reclamation Facility in Pueblo, Colorado, uses AvN aeration controls to lower aeration energy while promoting carbon-efficient nutrient removal and hydrocyclone-based wasting to achieve SVI improvements and process intensification. The results from the full-scale installation showed that hydrocyclone-based wasting helped improve settling characteristics by reducing the SVI from 200 ± 52 mL/g to 83 ± 22 mL/g within weeks of operation. PAO and nitrifiers were preferentially retained in dense flocs and granules, while lighter heterotrophic and filamentous organisms were preferentially wasted, thus uncoupling the SRT of these two fractions relative to the overall SRT. The SRT was estimated at 14.4 ± 3.4 days for dense aggregates and 7.1 ± 2.3 days for lighter flocs. The use of AvN control with continuous low DO conditions resulted in low DO conditions (< 0.3 mgO
Identifiants
pubmed: 34973545
pii: S0043-1354(21)01185-4
doi: 10.1016/j.watres.2021.117991
pii:
doi:
Substances chimiques
Sewage
0
Phosphorus
27YLU75U4W
Carbon
7440-44-0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
117991Informations de copyright
Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.