Waste activated sludge as biomass for production of commercial-grade Polyhydroxyalkanoate (PHA)

Arcos-Hernandez, M. V., Pratt, S., Laycock, B., Johansson, P., Werker, A. and Lant, P. A. (2012) Waste activated sludge as biomass for production of commercial-grade Polyhydroxyalkanoate (PHA). Waste and Biomass Valorisation, 4 1: 117-127. doi:10.1007/s12649-012-9165-z

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Author Arcos-Hernandez, M. V.
Pratt, S.
Laycock, B.
Johansson, P.
Werker, A.
Lant, P. A.
Title Waste activated sludge as biomass for production of commercial-grade Polyhydroxyalkanoate (PHA)
Journal name Waste and Biomass Valorisation   Check publisher's open access policy
ISSN 1877-2641
Publication date 2012-10-01
Sub-type Article (original research)
DOI 10.1007/s12649-012-9165-z
Volume 4
Issue 1
Start page 117
End page 127
Total pages 11
Place of publication Dordrecht, Netherlands
Publisher Springer
Collection year 2013
Language eng
Formatted abstract
Purpose This paper presents an assessment of the production of polyhydroxyalkanoates (PHA) in biomass sourced from wastewater treatment plants (WWTPs). The purpose was to examine both the potential for more generic
utilization of waste activated sludge as biomass for PHA production and the quality of the polymers produced.

Methods Biomass was sourced from two full-scale WWTPs. A refined acetic and propionic acid feedstock was used to produce a P(3HB-co-3HV) (polyhydroxy-butyratevalerate or PHBV) copolymer in a single-stage from this biomass as-received.

Results The mean overall storage yield was 0.25 ± 0.03 gCOD of polymer per gCOD feedstock consumed. The average PHA cell content was 0.26 ± 0.08 gPHA gVSS-1.
Microstructure and thermal properties analysis showed that the polymers produced were most likely a mixture of random copolymers, with polymer composition being
mainly a function of substrate composition. The PHA recovered was of high purity and exhibited thermal characteristics similar to published values.

Conclusions Based on published data, the overall yield for
a conventional PHA production system, utilizing volatile
fatty acid (VFA) feedstocks for biomass and biopolymer
Keyword Polyhydroxyalkanoate
Mixed culture
Direct accumulation
Waste activated sludge
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
Advanced Water Management Centre Publications
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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Created: Mon, 25 Mar 2013, 11:57:35 EST by Dr Bronwyn Laycock on behalf of School of Chemical Engineering