| Title: | Modeling organic matter and nitrogen removal from domestic wastewater in a pilot-scale vertical subsurface flow constructed wetland |
| Author(s): | Bustillo-Lecompte CF; Mehrvar M; Quinones-Bolanos E; Castro-Faccetti CF; |
| Address: | "a Graduate Program in Environmental Applied Science and Management, Ryerson University , Toronto , Ontario , Canada. b Department of Chemical Engineering , Ryerson University , Toronto , Ontario , Canada. c Faculty of Engineering, University of Cartagena, Cartagena de Indias , Colombia" |
| Journal Title: | J Environ Sci Health A Tox Hazard Subst Environ Eng |
| DOI: | 10.1080/10934529.2015.1120528 |
| ISSN/ISBN: | 1532-4117 (Electronic) 1093-4529 (Linking) |
| Abstract: | "Constructed wetlands have become an attractive alternative for wastewater treatment. However, there is not a globally accepted mathematical model to predict their performance. In this study, the VS2DTI software was used to predict the effluent biochemical oxygen demand (BOD) and total nitrogen (TN) in a pilot-scale vertical flow constructed wetland (VFCW) treating domestic wastewater. After a 5-week adaptation period, the pilot system was monitored for another 6 weeks. Experiments were conducted at hydraulic retention times (HRTs) in the range of 2-4 days with Typha latifolia as the vegetation. The raw wastewater concentrations ranged between 144-430 and 122-283 mg L(-1) for BOD5 and TN, respectively. A first-order kinetic model coupled with the advection/dispersion and Richards' equations was proposed to predict the removal rates of BOD5 and TN from domestic wastewater. Two main physical processes were modeled in this study, porous material water flow and solute transport through the different layers of the VFCW to simulate the constructed wetland (CW) conditions. The model was calibrated based on the BOD5 and TN degradation constants. The model indicated that most of BOD and TN (88 and 92%, respectively) were removed through biological activity followed by adsorption. It was also observed that the evapotranspiration was seen to have a smaller impact. An additional data series of effluent BOD and TN was used for model validation. The residual analysis of the calibrated model showed a relatively random pattern, indicating a decent fit. Thus, the VS2DTI was found to be a useful tool for CW simulation" |
| Keywords: | "Colombia *Denitrification Models, Theoretical Nitrogen/analysis/*metabolism Pilot Projects Typhaceae/*metabolism Volatile Organic Compounds/*metabolism Wastewater/analysis/*chemistry Water Pollutants, Chemical/analysis/*chemistry *Wetlands Bod Vs2dti cons;" |
| Notes: | "MedlineBustillo-Lecompte, Ciro Fernando Mehrvar, Mehrab Quinones-Bolanos, Edgar Castro-Faccetti, Claudia Fernanda eng Research Support, Non-U.S. Gov't England 2016/01/29 J Environ Sci Health A Tox Hazard Subst Environ Eng. 2016; 51(5):414-24. doi: 10.1080/10934529.2015.1120528. Epub 2016 Jan 28" |
