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Nitrogen Degradation Kinetic Analysis in Different Subsurface Constructed Wetlands
In this study, the kinetic models of pollutant degradation in different wetlands were studied. The kinetic equations were deduced and the kinetic simulation of the main pollutants such as NH3-N and TN was completed by the experimental data, and the dynamics of the pollutant degradation simulation model were applied to simulate the effect of the reaction kinetics model on the removal of contaminants in horizontal steel slag subsurface wetland (HSSSW) and horizontal volcanic subsurface wetland (HVSW). The results showed that the first order reaction kinetics model could obviously simulate the effect of main pollutants such as NH3-N and TN in two kinds of subsurface wetlands. The correlation coefficient R2 of the dynamic linear model was 0.9640 and 0.9600 in HSSSW, respectively, and the correlation coefficient R2 of the HVSW was 0.9365 and 0.9709, respectively. The degree of fitting and correlation was very good. Besides, the simulation results showed that the degradation of the main pollutant was of great reference value for the design and operation of the practical subsurface wetland.
Keywords
Constructed Wetland, Nitrogen Degradation, Kinetic Models.
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