Effect of long-term starvation conditions on polyphosphate- and glycogen-accumulating organisms

Vargas, M., Yuan, Z. and Pijuan, M. (2013) Effect of long-term starvation conditions on polyphosphate- and glycogen-accumulating organisms. Bioresource Technology, 127 126-131. doi:10.1016/j.biortech.2012.09.117


Author Vargas, M.
Yuan, Z.
Pijuan, M.
Title Effect of long-term starvation conditions on polyphosphate- and glycogen-accumulating organisms
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 0960-8524
1873-2976
Publication date 2013-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.biortech.2012.09.117
Volume 127
Start page 126
End page 131
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract
Endogenous processes such as biomass decay and intracellular polymers degradation of polyphosphate-accumulating organisms (PAOs) and glycogen-accumulating organisms (GAOs) were investigated. Cultures enriched in Accumulibacter (a well known PAO) or Competibacter (a well known GAO) were subjected to 21 and 26days of alternating anaerobic/aerobic conditions respectively. The main energy source for PAOs during starvation was their intracellular polyphosphate released into the medium during the first 14days of starvation. In contrast, GAOs used their intracellular glycogen during the 26days of starvation. Biomass decay rates were 0.029d-1 for PAOs and almost negligible for GAOs. The reduction in acetate uptake rate during the starvation period, referred to as activity decay, was 0.25 and 0.047d-1 for PAOs and GAOs, respectively. Once wastewater was reintroduced, both populations recovered their initial substrate uptake rate after 1day. The results obtained show that PAOs are more affected than GAOs by starvation conditions.
Keyword Polyphosphate-accumulating organisms
Glycogen-accumulating organisms
Endogenous metabolism
Starvation conditions
Decay processes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 10 October 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
Advanced Water Management Centre Publications
 
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