Effects of solids accumulation and plant root on water flow characteristics in horizontal subsurface flow constructed wetland

Liu, Huaqing; Hu, Zhen; Zhang, Jian; Ji, Mingde; Zhuang, Lin-Lan; Liu, Zhengyu

doi:10.1016/j.ecoleng.2018.07.003

Cited by 22 publications

(18 citation statements)

References 30 publications

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“…This means that the main flow is at the bottom. Bonner et al (2016) and Liu et al (2018) came to a similar conclusion from their results.…”

Section: Resultssupporting

confidence: 68%

“…Similar hydraulic behaviour was observed as described by Netter (1994); however, the authors attributed it to dead zones and hydraulic shortcuts. Liu et al (2018) investigated the effect of solids accumulation and root growth on the hydrodynamics of HSFCWs. They used three laboratory-scale HSFCWs.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al ( 2018 ) investigated the effect of solids accumulation and root growth on the hydrodynamics of HSFCWs. They used three laboratory-scale HSFCWs.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of conservative tracer measurement results inside a planted horizontal subsurface flow constructed wetland filled with coarse gravel using Frechet distribution

Dittrich

Klincsik

Somfai

et al. 2020

Environ Sci Pollut Res

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We worked out a method in Maple environment to help understand the difficult transport processes in horizontal subsurface flow constructed wetlands filled with coarse gravel (HSFCW-C). With this process, the measured tracer results of the inner points of a HSFCW-C can be fitted more accurately than with the conventionally used distribution functions (Gaussian, Lognormal, Fick (Inverse Gaussian) and Gamma). This research outcome only applies for planted HSFCW-Cs. The outcome of the analysis shows that conventional solutions completely stirred series tank reactor (CSTR) model and convection-dispersion transport (CDT) model do not describe the internal transport processes with sufficient accuracy. This study may help us develop better process descriptions of very complex transport processes in HSFCW-Cs. Our results also revealed that the tracer response curves of planted HSFCW-C conservative inner points can be fitted well with Frechet distribution only if the response curve has one peak.

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“…This means that the main flow is at the bottom. Bonner et al (2016) and Liu et al (2018) came to a similar conclusion from their results.…”

Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of conservative tracer measurement results inside a planted horizontal subsurface flow constructed wetland filled with coarse gravel using Frechet distribution

Dittrich

Klincsik

Somfai

et al. 2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…In this paper we intended to prove that this principle is valid with regard to the inner points of HSSFCWs. Liu et al (2018) investigated the effect of solids accumulation and root growth on the hydrodynamics of the HSFCWs. They used three laboratory-scale HSFCWs.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al ( 2018 ) investigated the effect of solids accumulation and root growth on the hydrodynamics of the HSFCWs. They used three laboratory-scale HSFCWs.…”

Section: Introductionmentioning

confidence: 99%

Application of divided convective-dispersive transport model to simulate variability of conservative transport processes inside a planted horizontal subsurface flow constructed wetland

Dittrich

Klincsik

Somfai

et al. 2020

Environ Sci Pollut Res

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This paper offers a novel application of our model worked out in Maple environment to help understand the very complex transport processes in horizontal subsurface flow constructed wetland with coarse gravel (HSFCW-C). We made tracer measurements: Inside a constructed wetland, we had 9 sample points, and samples were taken from each point at two depths. Our model is a divided convective-dispersive transport (D-CDT) model which makes a fitted response curve from the sum of two separate CDT curves showing the contributions of the main and side streams. Analytical solutions of CDT curves are inverse Gaussian distribution functions. This model was fitted onto inner points of the measurements to demonstrate that the model gives better fitting to the inner points than the commonly used convective-dispersive transport model. The importance of this new application of the model is that it can resemble transport processes in these constructed wetlands more precisely than the regularly used convective-dispersive transport (CDT) model. The model allows for calculations of velocity and dispersion coefficients. The results showed that this model gave differences of 4–99% (of velocity) and 2–474% (of dispersion coefficient) compared with the CDT model and values were closer to actual hydraulic behavior. The results also demonstrated the main flow path in the system.

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Wetlands for wastewater treatment

Ghimire

Nandimandalam

Martinez‐Guerra

et al. 2019

Water Environment Research

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This article presents an update on the research and practical demonstration of wetland treatment technologies for wastewater treatment. Applications of wetlands in wastewater treatment (as an advanced treatment unit or a decentralized system) and stormwater management or treatment for nutrient and pollutant removal (metals, industrial and emerging pollutants including pharmaceutical compounds and pathogens) are highlighted. A summary of studies involving the effects of vegetation, wetland design and operation, and configurations for efficient treatment of various municipal and industrial wastewaters is also included.

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Effects of solids accumulation and plant root on water flow characteristics in horizontal subsurface flow constructed wetland

Cited by 22 publications

References 30 publications

Analysis of conservative tracer measurement results inside a planted horizontal subsurface flow constructed wetland filled with coarse gravel using Frechet distribution

Analysis of conservative tracer measurement results inside a planted horizontal subsurface flow constructed wetland filled with coarse gravel using Frechet distribution

Application of divided convective-dispersive transport model to simulate variability of conservative transport processes inside a planted horizontal subsurface flow constructed wetland

Wetlands for wastewater treatment

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