Journal article
A novel post denitrification configuration for phosphorus recovery using polyphosphate accumulating organisms
Water Research, Vol.47(17), pp.6488-6495
2013
Abstract
Enhanced biological phosphorus removal (EBPR) has been widely used to remove phosphorus (P) from wastewater. In this study we report a novel modification to the EBPR approach, namely enhanced biological phosphorus removal and recovery (EBPR-r) that facilitates biological recovery of P from wastewater using a post denitrification configuration. The novel approach consists of two major steps. In the first step, a biofilm of phosphorus accumulating organisms (PAOs) is exposed to a wastewater stream in the absence of active aeration, during which P is taken up by the biofilm using nitrate and residual dissolved oxygen as electron acceptors. Thus, P and nitrogen (N) removal from wastewater is achieved. During the second step, the P enriched biofilm is exposed to a smaller recovery stream supplemented with an external carbon source to facilitate P release under anaerobic conditions. This allows P to be recovered as a concentrated liquid. The EBPR-r process was able to generate a P recovery stream four time more concentrated (28 mg-P/L) than the wastewater stream (7 mg-P/L), while removing nitrate (denitrification) from the wastewater stream. Repeated exposure of the biofilm (10 P-uptake and release cycles) to a recovery stream yielded up to 100 mg-P/L. Overall, EBPR-r is the first post denitrification strategy that can also facilitate P recovery during secondary wastewater treatment.
Details
- Title
- A novel post denitrification configuration for phosphorus recovery using polyphosphate accumulating organisms
- Authors/Creators
- P.Y. Wong (Author/Creator)K.Y. Cheng (Author/Creator)A.H. Kaksonen (Author/Creator)D.C. Sutton (Author/Creator)M.P. Ginige (Author/Creator)
- Publication Details
- Water Research, Vol.47(17), pp.6488-6495
- Publisher
- Elsevier BV
- Identifiers
- 991005543944307891
- Copyright
- © 2013 Elsevier Ltd.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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