The verification of the Constructed Wetland Model No. 1 implementation in HYDRUS using column experiment data

Applying Process-Based Models for Subsurface Flow Treatment Wetlands: Recent Developments and Challenges

“…A number of applications of the HYDRUS Wetland Module show that a good match between measured data and simulation results can be achieved [16][17][18][19][20]. Besides the application to municipal wastewater, the HYDRUS Wetland Model has also been used to model  TWs treating combined sewer overflow (CSO) [21][22][23][24][25],  TWs treating effluents of the wastewater treatment plant for irrigation purposes [26,27],  TWs treating artificial wastewater [28][29][30],  TWs treating greywater [31], and  TWs treating run-off from agricultural sites [32,33].…”

“…After adding the measured adsorption isotherms [45] and a first-order rate coefficient for non-equilibrium adsorption of 0.01/day in the zeolite filter simulation compared to the sand filter simulation, a good match between simulated and measured date could be obtained ("Effluent (Zeolite)-Simulated" in Table 7). Pálfy and Langergraber [28] simulated experimental results from batch-fed column experiments using the CWM1 biokinetic model. They described the need to adjust some parameters of the biokinetic model, i.e., the inhibition coefficients of acetotrophic methanogenic and sulphate reducing bacteria for dissolved oxygen and nitrate, respectively, to be able to simulate anaerobic, anoxic, and aerobic processes to occur in parallel.…”

“…Measured and simulated influent and effluent concentrations of VF filters (in mg/L, measured data: average values and standard deviations in brackets, simulated data: average values over 1 day; CR = readily biodegradable COD, CS = slowly biodegradable COD, and CI = inert COD as defined in the CW2D biokinetic model [7]; bold data are used for comparison). Pálfy and Langergraber [28] simulated experimental results from batch-fed column experiments using the CWM1 biokinetic model. They described the need to adjust some parameters of the biokinetic model, i.e., the inhibition coefficients of acetotrophic methanogenic and sulphate reducing bacteria for dissolved oxygen and nitrate, respectively, to be able to simulate anaerobic, anoxic, and aerobic processes to occur in parallel.…”

“…For VF wetlands, no significant difference between planted and unplanted wetland cells was observed or simulated. As described above, Pálfy and Langergraber [28] simulated batch-fed column experiments. Figure 7 shows the measured and simulated COD, NH 4 -N and SO 4 -S concentrations at 12 • C. The different behaviour of unplanted columns as well as those planted with Carex and Schoenoplectus could be simulated.…”

“…TWs treating combined sewer overflow (CSO) [21][22][23][24][25], • TWs treating effluents of the wastewater treatment plant for irrigation purposes [26,27], • TWs treating artificial wastewater [28][29][30], • TWs treating greywater [31], and • TWs treating run-off from agricultural sites [32,33].…”