Abstract
In this study, a self-supplying carbon source constructed wetland (CW) was developed and evaluated. Both the effects of plants (Typha latifolia) and plant fermentation broth on nitrate removal were measured. The results showed that the addition of plant fermentation broth greatly improved the nitrate removal rate. As the ratio of added chemical oxygen demand to influent nitrate (CODAdd/NO3-N ratio) increased from 0 to 3, the nitrate removal rate attributed to the plants increased from 0.09 to 0.29gNm−3d−1, but the proportion of total nitrate removal decreased from 27.3% to 10.7%, and denitrification was always the dominant nitrate removal mechanism. Furthermore, there were strong positive correlations between the CODAdd/NO3-N ratio and the nitrate removal rate, both in unplanted (R2=0.977) and planted (R2=0.996) microcosms. Plant biomass could potentially support a nitrate removal rate of 0.05–0.54gNm−2d−1 in self-supplying carbon source CWs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
