Publicação: Performance Evaluation of First-Order Hydraulic Models for COD Removal in Horizontal Subsurface-Flow Constructed Wetlands
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Asce-amer Soc Civil Engineers
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
The aims of the present study are to verify the performance of four first-order hydraulic models and identify the model that best described the kinetics of the chemical oxygen demand (COD) removal in constructed wetlands. Three horizontal subsurface-flow constructed wetlands (HSSFCWs) were examined: two were planted with Typha latifolia and one was left unplanted. Each HSSFCW received 50 L of secondary effluent daily, resulting in a hydraulic retention time of 3.2 days. The COD concentrations were determined throughout the HSSFCWs and compared in terms of the coefficient of determination with estimated values provided by hydraulic models. The performance of the models was verified under two different conditions: (1) without, and (2) with evapotranspiration (ET) effects. Among the studied models, the plug-flow hydraulic model revealed the poorest performance, whereas the modified plug-flow model (incorporating the coefficient of decay resistance) was the model that best described COD removal kinetics throughout the HSSFCW. The incorporation of water losses by ET improved the performance of all of studied models. (C) 2017 American Society of Civil Engineers.
Descrição
Palavras-chave
Constructed wetlands, First-order kinetic models, Hydraulic models, Chemical oxygen demand (COD) removal, Evapotranspiration
Idioma
Inglês
Como citar
Journal Of Environmental Engineering. Reston: Asce-amer Soc Civil Engineers, v. 143, n. 10, 4 p., 2017.
