Improvement of carbon usage for phosphorus recovery in EBPR-r and the shift in microbial community

P.Y. Wong; K.Y. Cheng; K.C.B. Krishna; A.H. Kaksonen; D.C. Sutton; M.P. Ginige

doi:10.1016/j.jenvman.2018.03.130

Back

Improvement of carbon usage for phosphorus recovery in EBPR-r and the shift in microbial community

Journal article

Peer reviewed

Improvement of carbon usage for phosphorus recovery in EBPR-r and the shift in microbial community

P.Y. Wong, K.Y. Cheng, K.C.B. Krishna, A.H. Kaksonen, D.C. Sutton and M.P. Ginige

Journal of Environmental Management, Vol.218, pp.569-578

2018

DOI: https://doi.org/10.1016/j.jenvman.2018.03.130

Files and links (1)

url

Link to Published Version *Subscription may be requiredView

Abstract

Enhanced biological phosphorus removal and recovery (EBPR-r) is a biofilm process that makes use of polyphosphate accumulating organisms (PAOs) to remove and recover phosphorus (P) from wastewater. The original process was inefficient, as indicated by the low P-release to carbon (C)-uptake (Prel/Cupt) molar ratio of the biofilm. This study successfully validated a strategy to improve the Prel/Cupt ratio by at least 3-fold. With an unchanged supply of carbon in the recovery stream, an increase in the hydraulic loading in stages I, II and III (7.2, 14.4 and 21.6 L, respectively) resulted in a 43% increase in the Prel/Cupt ratio (0.069, 0.076 and 0.103, respectively). The ratio further increased by 150% (from 0.103 to 0.255) when the duration of the P uptake period was increased from 4 h (stage III) to 10 h (stage IV). Canonical correspondence analysis showed that, correlated to the 3-fold increase in the Prel/Cupt ratio, there was an increase in the abundance of PAOs (“Candidatus Accumulibacter” Clade IIA) and a decrease in the occurrence of glycogen accumulating organisms (GAOs) (family Sinobacteraceae). However, the four stage operation impaired denitrification, resulting in a 5-fold reduction in the Nden/Pupt ratio. The decline in denitrification was consistent with a decrease in the abundance of denitrifiers including denitrifying PAOs (family Comamonadaceae and “Candidatus Accumulibacter” Clade IA). Overall, a strategy to facilitate more efficient use of carbon was validated, enabling a 3-fold carbon saving for P recovery. The new process enabled up to 80% of the wastewater P to be captured in a P-enriched stream (>90 mg/L) with a single uptake/release cycle of recovery.

Details

Title: Improvement of carbon usage for phosphorus recovery in EBPR-r and the shift in microbial community
Authors/Creators: P.Y. Wong (Author/Creator) - The University of Western Australia
K.Y. Cheng (Author/Creator) - Murdoch University
K.C.B. Krishna (Author/Creator) - Western Sydney University
A.H. Kaksonen (Author/Creator) - The University of Western Australia
D.C. Sutton (Author/Creator) - The University of Western Australia
M.P. Ginige (Author/Creator) - CSIRO Land and Water
Publication Details: Journal of Environmental Management, Vol.218, pp.569-578
Publisher: Academic Press
Identifiers: 991005544169507891
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites

Metrics

11 Record Views

23 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.83 Bioengineering; 3.83.466 Activated Sludge
Web Of Science research areas: Environmental Sciences
ESI research areas: Environment/Ecology