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An alkali-tolerant strain Microbacterium esteraromaticum C26 produces a high yield of cation-independent bioflocculant

School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu Province, China

A novel cation-independent bioflocculant BF-C26 produced by an alkali-tolerant strain Microbacterium esteraromaticum C26 was investigated in this study. The fermentation conditions for BF-C26 production were analyzed, including initial pH, carbon source, nitrogen source and the ratio of carbon source to nitrogen source. The result showed that 4.92 g/L bioflocculant BF-C26 was obtained at the following optimized conditions: 3 g/L glucose as carbon source, 10 g/L peptone as nitrogen source and initial pH 8.1. The component assay showed that BF-C26 was a complex of 52.8% proteins and 28.1% polysaccharides. The effects of physicochemical parameters including metal ions, temperature, pH and bioflocculant dosage on flocculating properties of BF-C26 were optimized. The highest flocculating rate of 94.82% was achieved when 4 mg/L BF-C26 was added into the kaolin suspension at pH 8.23 and 30 °C. In this study, Microbacterium esteraromaticum was reported for the first time as a cation-independent bioflocculant producing strain.
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Keywords bioflocculant; cation-independent; Microbacterium esteraromaticum; polysaccharide

Citation: Weijie Liu, Rongnan He, Cong Liu. An alkali-tolerant strain Microbacterium esteraromaticum C26 produces a high yield of cation-independent bioflocculant. AIMS Environmental Science, 2016, 3(3): 408-419. doi: 10.3934/environsci.2016.3.408

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This article has been cited by

  • 1. Weijie Liu, Yan Hao, Jihong Jiang, Cong Liu, Aihua Zhu, Jingrong Zhu, Zhen Dong, Biopolymeric flocculant extracted from potato residues using alkaline extraction method and its application in removing coal fly ash from ash-flushing wastewater generated from coal fired power plant, AIMS Environmental Science, 2017, 4, 1, 27, 10.3934/environsci.2017.1.27
  • 2. Jibrin Ndejiko Mohammed, Wan Rosmiza Zana Wan Dagang, Role of Cationization in Bioflocculant Efficiency: a Review, Environmental Processes, 2019, 10.1007/s40710-019-00372-z

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