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Modeling the effect of plants and peat on evapotranspiration in constructed wetlands

Florent Chazarenc, Simon Naylor, Yves Comeau, Gérard Merlin and Jacques Brisson

Article (2010)

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Cite this document: Chazarenc, F., Naylor, S., Comeau, Y., Merlin, G. & Brisson, J. (2010). Modeling the effect of plants and peat on evapotranspiration in constructed wetlands. International Journal of Chemical Engineering, 2010, p. 1-6. doi:10.1155/2010/412734
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Abstract

Evapotranspiration (ET) in constructed wetlands (CWs) represents a major factor affecting hydrodynamics and treatment performances. The presence of high ET was shown to improve global treatment performances, however ET is affected by a wide range of parameters including plant development and CWs age. Our study aimed at modelling the effect of plants and peat on ET in CWs; since we hypothesized peat could behave like the presence of accumulated organic matter in old CWs. Treatment performances, hydraulic behaviour, and ET rates were measured in eight 1 m2 CWs mesocosm (1 unplanted, 1 unplanted with peat, 2 planted with Phragmites australis, 2 planted with Typha latifolia and 2 planted with Phragmites australis with peat). Two models were built using first order kinetics to simulate COD and TKN removal with ET as an input. The effect of peat was positive on ET and was related to the better growth conditions it offered to macrophytes. Removal efficiency in pilot units with larger ET was higher for TKN. On average, results show for COD a k20 value of 0.88 d−1 and 0.36 d−1 for TKN. We hypothesized that the main effect of ET was to concentrate effluent, thus enhancing degradation rates.

Open Access document in PolyPublie
Subjects: 1000 Génie civil > 1006 Génie hydrologique
4500 Hydrologie > 4500 Hydrologie
4800 Science du sol > 4800 Science du sol
Department: Département des génies civil, géologique et des mines
Research Center: Non applicable
Funders: CRSNG / NSERC
Date Deposited: 18 Jul 2019 14:33
Last Modified: 19 Jul 2019 01:20
PolyPublie URL: https://publications.polymtl.ca/3652/
Document issued by the official publisher
Journal Title: International Journal of Chemical Engineering (vol. 2010)
Publisher: Hindawi
Official URL: https://doi.org/10.1155/2010/412734

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