A two-year survey of bacterial populations in activated sludge was carried out in a municipal sewage treatment plant receiving industrial wastewater having a high nitrate content. Phosphorus removal was not improved with a modified operation with a dissolved oxygen (DO)-deficient selector. In these circumstances, the anoxic selector in the aeration tanks acted as a site for denitrification not as a site for phosphate incorporation. The ecological interactions between the different bacterial species are thought to occur in the anoxic zone. Possible competition between the Pseudomonas/Alcaligenes group and the Acinetobacter/Moraxella group was suggested under laboratory conditions. Commensalism between the Enterobacter/Aeromonas group and the Acinetobacter/Moraxella group was observed by using a Nuclepore membrane-dialysis culture technique.
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Research Article| February 01 1991
Influence of Nitrate on the Bacterial Flora of Activated Sludge under Anoxic Condition
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Water Sci Technol (1991) 23 (4-6): 765–772.
Jun-ichi Takeuchi; Influence of Nitrate on the Bacterial Flora of Activated Sludge under Anoxic Condition. Water Sci Technol 1 February 1991; 23 (4-6): 765–772. doi: https://doi.org/10.2166/wst.1991.0527
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