Abstract
In this paper, the moderately halophilic bacterium Halomonas venusta DSM 4743T was selected to optimize the N removal conditions and the electricity generation conditions in the MFC, and conduct the coupled operation of the electricity generation and denitrification of MFC high-salt wastewater. The results showed when sodium succinate was used as carbon source, C/N was 5:1, pH was 9, and NaCl was 30 g/L, 93.22% N removal rate was obtained at 168 h. The maximum output voltage of MFC is 346 mV under the conditions of 6 g/L NaAc, 50 μm riboflavin, pH=8 and 30 g/L NaCl. H. venusta DSM 4743T MFC generates electric denitrification coupled operation, with the maximum output voltage up to 224 mV and the denitrification rate of 53.5%.
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