Journal
BIORESOURCE TECHNOLOGY
Volume 179, Issue -, Pages 421-428Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.12.057
Keywords
Vibrio diabolicus; Halophilic bacterium; Heterotrophic nitrification; Aerobic denitrification; Aerated biological filter
Funding
- Science and Technology project of Fujian Province [2013N5008]
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A novel halophilic bacterium capable of heterotrophic nitrification-aerobic denitrification was isolated from marine sediments and identified as Vibrio diabolicus SF16. It had ability to remove 91.82% of NH4+-N (119.77 mg/L) and 99.71% of NO3-N (136.43 mg/L). The nitrogen balance showed that 35.83% of initial NH4+-N (119.77 mg/L) was changed to intracellular nitrogen, and 53.98% of the initial NH4+-N was converted to gaseous denitrification products. The existence of napA gene further proved the aerobic denitrification ability of strain SF16. The optimum culture conditions were salinity 1-5%, sodium acetate as carbon source, C/N 10, and pH 7.5-9.5. When an aerated biological filter system inoculated with strain SF16 was employed to treat saline wastewater, the average removal efficiency of NH4+-N and TN reached 97.14% and 73.92%, respectively, indicating great potential of strain SF16 for future full-scale applications. (C) 2014 Elsevier Ltd. All rights reserved.
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