An integrated model of substrate clogging in vertical flow constructed wetlands

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Title: An integrated model of substrate clogging in vertical flow constructed wetlands
Authors: Hua, G. F.
Li, L.
Zhao, Y.Q.
et al.
Permanent link: http://hdl.handle.net/10197/4860
Date: Apr-2013
Abstract: This paper presents an integrated model of substrate clogging in a vertical flow constructed wetland (VFCW). The model simulates the reduction of pore space in the wetland substrate due to combined influences of various physical, biogeochemical and plant-related processes. A series of experiments based on laboratory-scale VFCWs were conducted to examine and measure key parameters related to clogging of the wetland substrate during operation under different conditions. The model was then validated using data collected from the experiments. The results showed that the model was able to replicate the clogging phenomenon as observed in the experiments, in particular, the characteristic clogging time. The model also predicted well individual contributions to clogging by accumulated inert suspended solids, microbial biomass and plant root materials during the wetland operation. Although the validation was based on the laboratory data, the results indicated that the model describes well the processes underlying the clogging and has the potential to become a tool for assessing the performance of prototype CWs in relation to clogging at both the design and operation stages.
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2013 Elsevier
Keywords: Constructed wetland (CW);Substrate clogging;Microbial biomass;Plant roots;Organic suspended solids
DOI: 10.1016/j.jenvman.2013.01.023
Language: en
Status of Item: Peer reviewed
Appears in Collections:Earth Institute Research Collection
Civil Engineering Research Collection

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