Journal article
The ability of PAOs to conserve their storage-driven phosphorus uptake activities during prolonged aerobic starvation conditions
Journal of Water Process Engineering, Vol.23, pp.320-326
2018
Abstract
A post-denitrification process, known as enhanced biological phosphorus removal and recovery (EBPR-r), was recently developed to facilitate phosphorus (P) recovery from municipal wastewater. This process utilises a biofilm containing phosphate-accumulating organisms (PAOs) to capture P from wastewater and then release the captured P into a separate smaller stream for recovery. The addition of external carbon in the EBPR-r process is expected to be a main operating cost. Hence, it is important to ensure that the added carbon, which is stored internally as poly-β-hydroxy-alkanoates (PHA) within PAOs, is predominately used for P uptake. This study explored the ability of PAOs to conserve their storage-driven P uptake activities following exposure of the biofilm to oxidising and P-deficient conditions for extended periods (up to 7 days). Even after 2 days of exposure the biofilm retained a similar ability to up take P (1.20 ± 0.09 mg-P/g total solids). Beyond 2 days of exposure, a decline in P uptake activity was noted, with only 15% activity remaining by day 7. This study provides the first evidence of the ability of PAOs to conserve their storage-driven P uptake activities. This unique behaviour of PAOs may enable flexible operational strategies, such as infrequent carbon replenishment, to be implemented (i.e. facilitate multiple P uptake phases before an anaerobic carbon replenishment). Such flexibility may reduce the capital and operational costs of the EBPR-r process, increasing the economic incentive for P recovery from wastewater.
Details
- Title
- The ability of PAOs to conserve their storage-driven phosphorus uptake activities during prolonged aerobic starvation conditions
- Authors/Creators
- P.Y. Wong (Author/Creator)M.P. Ginige (Author/Creator)A.H. Kaksonen (Author/Creator)D.C. Sutton (Author/Creator)K.Y. Cheng (Author/Creator)
- Publication Details
- Journal of Water Process Engineering, Vol.23, pp.320-326
- Publisher
- Elsevier
- Identifiers
- 991005544155207891
- Copyright
- © 2018 Elsevier Ltd.
- 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
27 Record Views
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
- Engineering, Chemical
- Engineering, Environmental
- Water Resources
- ESI research areas
- Engineering