Towards a luxury uptake process via microalgae – Defining the polyphosphate dynamics

Powell, Nicola, Shilton, Andy, Chisti, Yusuf and Pratt, Steven (2009) Towards a luxury uptake process via microalgae – Defining the polyphosphate dynamics. Water Research, 43 17: 4207-4213. doi:10.1016/j.watres.2009.06.011


Author Powell, Nicola
Shilton, Andy
Chisti, Yusuf
Pratt, Steven
Title Towards a luxury uptake process via microalgae – Defining the polyphosphate dynamics
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
Publication date 2009-09-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.watres.2009.06.011
Open Access Status
Volume 43
Issue 17
Start page 4207
End page 4213
Total pages 7
Editor David Dixon
Jean-Claude Block
Mogens Henze
Place of publication United Kingdom
Publisher Pergamon
Language eng
Subject C1
Abstract Microalgae in waste stabilization ponds (WSP) have been shown to accumulate polyphosphate. This luxury uptake of phosphorus is influenced by the wastewater phosphate concentration, light intensity and temperature, but the dynamics of how these factors affect luxury uptake with respect to time are not understood. With improved understanding of the dynamics of this mechanism and how it could be manipulated, a phosphorus removal process utilizing luxury uptake by microalgae might be developed. In this work, luxury uptake was investigated by chemical extraction of the acid-soluble and acid-insoluble fractions of polyphosphate in the microalgae. The results showed that the initial accumulation and subsequent utilization of both acid-soluble polyphosphate (ASP) and acid-insoluble polyphosphate (AISP) is a function of the wastewater phosphate concentration. It was found that light intensity influenced both the accumulation and utilization of ASP. The temperature influenced the accumulation of AISP. AISP is believed to be a form of phosphorus storage and ASP is involved in metabolism however, the results of this work show that ASP can also act as a short term form of phosphorus storage. To optimize luxury uptake by microalgae a ‘luxury uptake pond’ is proposed where the conditions the microalgae are exposed to can be manipulated. This ‘luxury uptake pond’ would be designed to expose the microalgae to a high phosphate concentration and high light intensity for a short period of time in order to achieve optimal polyphosphate accumulation. Subsequent harvesting would then remove the phosphorus rich microalgae from the system.
Keyword luxury uptake
microalgae
nutrient removal
phosphorus
polyphosphate
waste stabilisation ponds
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Online 11/6/09

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 89 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 20 Apr 2010, 22:43:41 EST by Hong Lee on behalf of Advanced Water Management Centre