Water Quality Simulation in a Subsurface-Flow Constructed Wetland
Date Issued
2009
Date
2009
Author(s)
Hsu, Chia-Chuan
Abstract
This study aims at simulating water treatment efficiency of an oyster-shell subsurface flow constructed wetland and assessing the effects of biofilms on water quality improvement by a dynamic simulation model of biochemical processes in wetlands developed by some wildly-applied equations. AQUASIM 2.1 was used as the interface of mathematical calculations to develop the simulation model. Specifically, the Mixed Reactor and Saturated Soil Column were linked with the Biofilm Reactor respectively as two different types of hydrologic systems. The equations of biochemical processes in wetlands were combined into two hydrologic systems respectively to develop water quality simulation models for constructed wetlands.ield sampling data conducted by Guo(2009) were applied in this study for model calibration and validation. To improve the efficiency of model calibration and realize the major factors of water quality in wetlands, sensitivity analysis of parameters in each nutrient cycle was performed before model calibration stage. The error comparison between the simulation and measured outflow concentrations was carried on through statistical analysis to validate the availability of the model. Consequently, the results of the study, including the finding of feasible ranges for major affecting parameter values and the predicted water treatment efficiencies of constructed wetlands with various designs, are expected to give some valuable information for design, construction, manipulation, management, and diagnosis of constructed wetlands in the future.
Subjects
Subsurface flow constructed wetland
Water quality simulation
Biofilm
Oyster shell
SDGs
Type
thesis
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