Phosphate removal using aerobic bacterial consortium and pure cultures isolated from activated sludge |
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| Affiliation: | 1. Department of Natural and Life Sciences, Faculty of Sciences, University of Batna, Batna 05000, Algeria;2. Department of Natural and Life Sciences, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12002, Algeria;3. Veterinary and Agricultural Sciences Institute, Department of Veterinary Sciences, University of Batna, Batna 05000, Algeria;4. Department of Chemical Engineering, Faculty of Sciences and Technology, University of Khenchela, Khenchela 40004, Algeria;1. Department of Microbiology and Biochemistry, Faculty of Natural and Life Sciences, University of Batna 2, Batna 05078, Algeria;2. Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12002, Algeria;3. Veterinary and Agricultural Sciences Institute, Department of Veterinary Sciences, University of Batna 1, Batna 05000, Algeria;1. Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;1. Research Center of Water Treatment Engineering, Jimei University, Xiamen 361021, PR China;2. School of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China |
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| Abstract: | In the present study, an attempt is made to evaluate the kinetics of biological phosphate removal using a bacterial consortium of activated sludge, as well as screening for dominant polyphosphates accumulating bacteria. The results showed an efficient phosphate uptake (P < 0.001) of the consortium, with rates related to the initial concentration of both phosphate and carbon sources. Short chain volatile fatty acids presented the suitable substrates for enhanced biological phosphorus removal, of which maximum yield reached 99.23% and 78.51% in basal salt medium supplemented with 0.5% of sodium acetate and lactate respectively. Fifteen phosphate-accumulating bacteria were isolated from the activated sludge and only four isolates were selected and characterized as Pseudomonas aeruginosa AS1, Moraxella lacunata AS2, Acinetobater junii AS3 and Alcaligenes denitrificans AS4. The highest efficiency of phosphate uptake using pure culture was achieved with Ac. junii AS3 (83.36) followed by P. aeruginosa AS1 (81.78%), Al. denitrificans AS4 (76.72%), and M. lacunata AS2 with 50.6%. |
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| Keywords: | Phosphate removal Polyphosphate-accumulating bacteria Activated sludge Bacterial consortium Batch culture |
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