Application of the self-organizing map (SOM) to assess the heavy metal removal performance in experimental constructed wetlands

Lee, Byoung-Hwa; Scholz, Miklas

doi:10.1016/j.watres.2006.07.027

Cited by 70 publications

(36 citation statements)

References 23 publications

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“…Vertical flow beds employing the tidal flow strategy have however been developed and demonstrated to enhance oxygen supply (Green et al, 1998;Scholz and Xu, 2002;Zhao et al, 2004;Lee and Scholz, 2006), making them a viable system for the treatment of such wastewaters. In this study, the BOD 5 loading varied from 35.8  8.5 g/m 2 .d to 111.7±13 g/m 2 .d.…”

Section: Discussionmentioning

confidence: 99%

Two strategies for improving animal farm wastewater treatment in reed beds

Babatunde

Zhao

2010

Environmental Technology

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In this study, dewatered alum sludge cakes were used as substrate in a laboratory scale tidal vertical flow reed bed system treating animal farm wastewater. The "tidal flow" operation was employed to enhance oxygen transfer into the reed bed system, while dewatered alum sludge cake was used to enhance phosphorus (P) removal in the system through ligand exchange. Except for the removal of P which was consistently high throughout the experiment, the removal of organics

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Section: Discussionmentioning

confidence: 99%

Two strategies for improving animal farm wastewater treatment in reed beds

Babatunde

Zhao

2010

Environmental Technology

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“…Experimental results have shown that under hydraulic and organic loading rates as high as 0.43 m 3 /m 2 d and 1055 gCOD/m 2 d, removal efficiencies of 77% (COD), 78% (BOD 5 ), 66% (SS), 68% (NH 4 -N) and 38% (P) can be achieved using a multistage "tidal flow" reed bed system (Zhao et al, 2004a). In a separate study, Lee and Scholz (2006) also employed the tidal flow concept to encourage air penetration through the aggregates of CWs filters treating gully pot liquor in a cold climate. The CWs filters were periodically inundated (100%) with pre-treated inflow gully pot liquor and partially drained (50%) or entirely drained (0%).…”

Section: Tidal Flow Constructed Wetland Systemsmentioning

confidence: 99%

“…Unlike the current trend of assessing and predicting CWs treatment performance by applying novel and well-known modelling approaches such as self organizing maps (SOM) (Lee and Scholz, 2006); multiple regression analysis (MRA) (Volodymyr et al, 2007); and the CW2D model (Malte et al, 2007), most of CWs assessment are still limited to input-ouput data analysis only. While it is appreciated that most of the systems are still relatively young and data may be insufficient, it is well noted that such modelling approaches cannot be done without, in line with current trends.…”

Section: Treatment Performancesmentioning

confidence: 99%

Constructed wetlands for environmental pollution control: A review of developments, research and practice in Ireland

Babatunde

Zhao

O'Neill

et al. 2008

Environment International

164

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For the purpose of synthesizing a compendium of efforts aimed at environmental pollution control through the use of constructed wetlands systems (CWs) in Ireland, a detailed review of CWs was undertaken. Emphasis was placed on the diverse range of development, practice and researches on CWs technology, placing them in the overall context of the need for lowcost and sustainable wastewater treatment systems. The potential use of CWs in protecting estuarine quality within the current legislative framework is considered, as well as the emerging concept of integrated constructed wetlands (ICWs). In addition, an assessment of the efficiency of CWs in operation in Ireland towards abating environmental pollution was done, and compared with CWs operating in other European countries. The need for sufficient and appropriate data to assist in further development of CWs and modelling studies, and instilling confidence in the public is also highlighted.

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“…Among them, a very general distinction can be made: those focusing on simulation of the hydraulics (Dittmer et al 2005;Fan et al 2008;Galvão et al 2010;Korkusuz et al 2007;Kotti et al 2013), the hydrodynamics and clogging (or any of them individually) Giraldi et al 2009Giraldi et al , 2010Hua et al 2013;Knowles and Davies 2011;Suliman et al 2006) and those focusing on the removal of a specific pollutant or a set of pollutants (which generally also include hydraulic and hydrodynamic models of diverse complexity). Among the latter, the most commonly targeted pollutants are organic compounds (Akratos et al 2008;Henrichs et al 2007;Liolios et al 2012;Toscano et al 2009), nitrogen (Akratos et al 2009;Henrichs et al 2009;Mayo and Bigambo 2005;McBride and Tanner 2000;Meyer et al 2006Meyer et al , 2011Morvannou et al 2013;Moutsopoulos et al 2011;Toscano et al 2009), sulphur (Lloyd et al 2004), phosphorous (Hafner and Jewell 2006), heavy metals and mine drainage (Goulet 2001;Lee and Scholz 2006;Mitsch and Wise 1998), arsenic , pesticides (Krone-Davis et al 2013) and emerging pollutants (Hijosa-Valsero et al 2011).…”

Section: Model Selectionmentioning

confidence: 99%

Subsurface Flow Constructed Wetland Models: Review and Prospects

Samsó

Meyer²,

García

2014

The Role of Natural and Constructed Wetlands in Nutrient Cycling and Retention on the Landscape

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Numerical models are recognized nowadays as a powerful tool to increase the understanding of the internals of constructed wetlands and to help improve their design. Over the last decade many models have been developed, and many simulation studies have been published. Despite diversity is generally a positive thing, having so many different models can be confusing for potential users and may also hinder further development of the existing ones. The aim of this paper is to summarize the state of the art of this discipline, focussing the attention on the most feature-rich process-based models for constructed wetlands for urban wastewater treatment. Their description is combined with a feature comparison in a tabular format to facilitate the selection of one or another based on the specific needs of the potential user. Moreover, a discussion is made regarding the advantages of each reviewed model regarding features, licencing and expected evolution of each of them. Later in the document, we describe the essential phenomena, parameters and processes that we believe that future generation of constructed wetlands models should incorporate, to guide further research on this discipline. Although this paper is focused on models used in academic circles, a model developed to optimize the design of combined sewer overflow wetlands is presented as an example of the potential of design-focused wetlands. At the end of the paper we provide an overview of the past, present and future of constructed wetlands models and analyse were we stand and which is the way to go and the main goals in the near future.

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Application of the self-organizing map (SOM) to assess the heavy metal removal performance in experimental constructed wetlands

Cited by 70 publications

References 23 publications

Two strategies for improving animal farm wastewater treatment in reed beds

Two strategies for improving animal farm wastewater treatment in reed beds

Constructed wetlands for environmental pollution control: A review of developments, research and practice in Ireland

Subsurface Flow Constructed Wetland Models: Review and Prospects

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