Abstract
Water quality standard for nitrate becomes more and more strict, and the plant carbon source is widely used for denitrification by constructed wetland (CW) and bioreactor. However, the nitrate removal efficiency by different types of plant carbon source are not evaluated comprehensively. Denitrification performance of different plant carbon sources, and the influence of dosing method and pretreatment are thoroughly reviewed in this paper, which aims to investigate the accurate utilization of plant carbon source for nitrogen (as nitrate) removal. It is concluded that plant carbon source addition for all types of CWs and bioreactors can improve the nitrate removal efficiency to some extent, and the dosing method of plant carbon source for denitrification should be further studied and optimized in the future. The popular carbon sources for CW and bioreactor denitrification enhancement are woodchip, chopped macrophytes, crop plants, macrophytes litters, etc. The recommended optimum C:N ratios for CW and bioreactor are 4.0:5.0 and 1.8:3.0, respectively. The physical and biological pretreatments are selected to supply organic carbon for long-term denitrification.
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This study was supported by National Major Science and Technology Program for Water Pollution Control and Treatment (2012ZX07105-002). The authors also appreciate support from Research Center for Water Pollution Control Technology at Chinese Research Academy of Environmental Sciences.
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Hang, Q., Wang, H., Chu, Z. et al. Application of plant carbon source for denitrification by constructed wetland and bioreactor: review of recent development. Environ Sci Pollut Res 23, 8260–8274 (2016). https://doi.org/10.1007/s11356-016-6324-y
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DOI: https://doi.org/10.1007/s11356-016-6324-y