Production of Polyhydroxyalkanoate During Treatment of Low-Phosphorus-Content Wastewater
Authors: Drnevich, Maura A.; Noguera, Daniel R.
Source: Water Environment Research, Volume 76, Number 4, July/August 2004 , pp. 380-383(4)
Publisher: Water Environment Federation
Abstract:To evaluate whether poly-β-hydroxyalkanoate (PHA) production and wastewater treatment could be combined in a single biological process, a bench-scale sequencing batch reactor was operated with sequential anaerobic and aerobic stages and removal of excess sludge at different stages of treatment. The reactor treated synthetic wastewater with a high organic and low nutrient content, simulating industrial wastewater. Chemical oxygen demand removal efficiency was more than 90% in all cases. Poly-β-hydroxyalkanoate accumulation was significant, although it did not appear to be induced by oxygen limitations during the anaerobic stage. Sphaerotilus natans was apparently the dominant PHAaccumulating organism at the end of each reactor run and corresponded to a PHA accumulation of 16 to 20% of the total dry cell mass. Before S. natans dominated the reactors, PHA accumulation was approximately 17% when biomass was removed at the end of the aerobic stage and 6.6% when sludge removal also occurred during the anaerobic stage.
Document Type: Research Article
Publication date: 2004-07-01
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