Journal article
Re-visiting the Phostrip process to recover phosphorus from municipal wastewater
Chemical Engineering Journal, Vol.343, pp.390-398
2018
Abstract
This study examined an innovative approach to make use of the Phostrip process to recover phosphorus (P) from municipal wastewater. Returned activated sludge (RAS) from a municipal wastewater treatment plant was systematically studied to examine P release kinetics of RAS in a recovery stream that contained high concentrations of phosphate (PO43−-P). Findings suggested that the specific P release rate in RAS declined with increasing concentration of PO43−-P in the recovery stream. However, there was a strong positive linear correlation between acetate consumed and P released by the RAS (Pearson product-moment correlation coefficient [r = 0.98, n = 45, p < 0.005]). The data also suggest that acetate concentration in the recovery stream was not a factor in the observed reduction of specific P release rate with increasing PO43−-P in the recovery stream. When P release rates (poly-P hydrolysis rate) at different initial P concentrations were modelled using a modified Michaelis-Menten equation, a good fit was achieved between the experimental and the modelled data. According to the model, the maximum specific P release rate (18 mg-P/g-MLSS.h) halved when PO43−-P concentration in the recovery stream reached approximately 83 mg-P/L. Additionally, the RAS demonstrated a Prelease/Cacetate uptake molar ratio of approximately 0.5. An application of the derived P release kinetics into an innovative side stream process configuration showed that a Phostrip tank with a small footprint (9 m3) is sufficient to facilitate P recovery from a wastewater treatment plant that receives 61 ML/d of influent.
Details
- Title
- Re-visiting the Phostrip process to recover phosphorus from municipal wastewater
- Authors/Creators
- S. Salehi (Author/Creator) - CSIRO Land and WaterK.Y. Cheng (Author/Creator) - Murdoch UniversityA. Heitz (Author/Creator) - Curtin UniversityM.P. Ginige (Author/Creator) - CSIRO Land and Water
- Publication Details
- Chemical Engineering Journal, Vol.343, pp.390-398
- Publisher
- Elsevier
- Identifiers
- 991005541331207891
- Copyright
- © 2018 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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InCites Highlights
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- 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
- ESI research areas
- Engineering