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Impacts of electron donor and acceptor on the performance of electrotrophic denitrification

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Abstract

Electrotrophic denitrification is a novel nitrogen removal technique. In this study, the performance and the mechanism of electrotrophic denitrification were investigated at different nitrate concentrations and current intensities. The results showed that the performance of electrotrophic denitrification was good with a sludge loading of 0.39 kg N/kg VSS day. The half-saturation constant for nitrate-N was 1894.03 mg/L. The optimal nitrate-N concentration and current intensity were 1500 mg/L and 20 μA, respectively. Electrotrophic denitrification was defined as the process of direct use of electron for nitrate reduction, and electrotrophic denitrifier was proposed to be the microbe of using electricity as energy source directly. The present work will benefit the development and application of electrotrophic denitrification.

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Acknowledgements

This work was supported by the Natural Science Foundation of Zhejiang (LZ15E080001) and the Natural Science Foundation of China (51608474).

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Authors and Affiliations

  1. Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, People’s Republic of China

    Aqiang Ding, Ping Zheng, Meng Zhang & Qianqian Zhang

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  1. Aqiang Ding
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  2. Ping Zheng
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  3. Meng Zhang
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  4. Qianqian Zhang
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Correspondence to Ping Zheng.

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Responsible editor: Angeles Blanco

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Ding, A., Zheng, P., Zhang, M. et al. Impacts of electron donor and acceptor on the performance of electrotrophic denitrification. Environ Sci Pollut Res 24, 19693–19702 (2017). https://doi.org/10.1007/s11356-017-9455-x

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