You, Sheng-Jie and Tsai, Yung-Pin and Cho, Bo-Chuan and Chou, Yi-Hsiu (2011) Metabolic influence of lead on polyhydroxyalkanoates (PHA) production and phosphate uptake in activated sludge fed with glucose or acetic acid as carbon source. Bioresource Technology , 102 (17). pp. 8165-8170. ISSN 0960-8524 http://resolver.caltech.edu/CaltechAUTHORS:20110922-103950228
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Sludge in a sequential batch reactor (SBR) system was used to investigate the effect of lead toxicity on metabolisms of polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) communities fed with acetic acid or glucose as their sole carbon source, respectively. Results showed that the effect of lead on substrate utilization of both PAOs and GAOs was insignificant. However, lead substantially inhibited both of phosphate release and uptake of PAOs. In high concentration of acetic acid trials, an abnormal aerobic phosphate release was observed instead of phosphate uptake and the release rate increased with increasing lead concentration. Results also showed that PAOs could normally synthesize polyhydroxybutyrate (PHB) in the anaerobic phase even though lead concentration was 40 mg L^(−1). However, they could not aerobically utilize PHB normally in the presence of lead. On the other hand, GAOs could not normally metabolize polyhydroxyvalerate (PHV) in both the anaerobic and aerobic phases.
|Additional Information:||© 2011 Elsevier Ltd. Received 30 March 2011; revised 5 June 2011; Accepted 6 June 2011. Available online 12 June 2011. This study was supported by a grant received from the National Science Council, Taiwan, Republic of China (NSC 99-2918-I-260-001).|
|Subject Keywords:||Polyhydroxyalkanoates (PHA); Acetic acid; Glucose; Heavy metal; Phosphate removal|
|Official Citation:||Sheng-Jie You, Yung-Pin Tsai, Bo-Chuan Cho, Yi-Hsiu Chou, Metabolic influence of lead on polyhydroxyalkanoates (PHA) production and phosphate uptake in activated sludge fed with glucose or acetic acid as carbon source, Bioresource Technology, Volume 102, Issue 17, September 2011, Pages 8165-8170, ISSN 0960-8524, 10.1016/j.biortech.2011.06.022. (http://www.sciencedirect.com/science/article/pii/S096085241100825X)|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||22 Sep 2011 18:18|
|Last Modified:||22 Sep 2011 18:18|
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