For commercial polyhydroxyalkanoate (PHA) production the objective is to maximise the fraction of feedstock that ends up as polymer, and minimise biomass growth. In this paper, oxygen limitation was applied to achieve this. Intracellular PHA content in mixed cultures in batch systems operated with low and high DO was compared. It is shown that in microaerophilic conditions a higher fraction of substrate is accumulated as PHA in comparison to high DO conditions, evidenced by elevated intracellular PHA content: in the order of 50% higher in the early stages of accumulation. However, the accumulation capacity is not affected by DO. The PHA content in biomass in both the low and high DO systems reached approximately 35%. The time taken for the PHA content in the low DO system to reach capacity was three times longer than in the high DO system.
Skip Nav Destination
Article navigation
Research Article|
January 01 2012
Microaerophilic conditions support elevated mixed culture polyhydroxyalkanoate (PHA) yields, but result in decreased PHA production rates
S. Pratt;
1Advanced Water Management Centre, The University of Queensland, Brisbane QLD 4072, Australia
E-mail: s.pratt@uq.edu.au
Search for other works by this author on:
A. Werker;
A. Werker
2AnoxKaldnes AB Klosterängsvägen 11A, 226 47 Lund, Sweden
Search for other works by this author on:
F. Morgan-Sagastume;
F. Morgan-Sagastume
2AnoxKaldnes AB Klosterängsvägen 11A, 226 47 Lund, Sweden
Search for other works by this author on:
P. Lant
P. Lant
1Advanced Water Management Centre, The University of Queensland, Brisbane QLD 4072, Australia
Search for other works by this author on:
Water Sci Technol (2012) 65 (2): 243–246.
Article history
Received:
July 26 2010
Accepted:
September 24 2010
Citation
S. Pratt, A. Werker, F. Morgan-Sagastume, P. Lant; Microaerophilic conditions support elevated mixed culture polyhydroxyalkanoate (PHA) yields, but result in decreased PHA production rates. Water Sci Technol 1 January 2012; 65 (2): 243–246. doi: https://doi.org/10.2166/wst.2012.086
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00