Green wall height and design optimisation for effective greywater pollution treatment and reuse

Journal of Environmental Management
Veljko ProdanovicAna Deletic

Abstract

Green walls that effectively treat greywater have the potential to become a part of the solution for the issues of water scarcity and pollution control in our cities. To develop reliable and efficient designs of such systems, the following two research questions were addressed: what would be the optimal design of a green wall for greywater treatment, and how tall should the system be to assure adequate treatment. This paper reports on (i) a long-term pollutant removal comparison study of two typical green wall configurations: pot and block designs, and (ii) a short-term profile study exploring pollutant retention at different heights of a three-level green wall, across different plant species. Removal of suspended solids (TSS), nitrogen (TN), phosphorus (TP), chemical oxygen demand (COD) and Escherichia coli was tested, as well as various physical parameters. Pot and block designs were found to exhibit similar pollutant removal performance for standard and high inflow concentrations, while the block design was more resistant to drying. However, due to its multiple practical advantages, pot designs are favoured. The greatest removal was achieved within the top green wall level for all studied pollutants, while subsequent levels ...Continue Reading

References

Jul 3, 2002·Genome Biology·Jose M Pardo, Francisco J Quintero
May 4, 2006·Annual Review of Plant Biology·Harsh P BaisJorge M Vivanco
Mar 3, 2009·The Science of the Total Environment·Fangyue LiRalf Otterpohl
Feb 22, 2012·Water Research·Sébastien Le CoustumerPeter Poelsma
Nov 22, 2016·Nature·E W SlessarevO A Chadwick
Dec 25, 2016·Water Research·Harsha S FowdarAna Deletic

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Citations

Dec 15, 2020·The Science of the Total Environment·Nicola Dal FerroMaurizio Borin
Oct 20, 2021·The Science of the Total Environment·V ThomaidiM S Fountoulakis

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