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Water 2015, 7(4), 1595-1609; doi:10.3390/w7041595

Laboratory Studies on Granular Filters and Their Relationship to Geotextiles for Stormwater Pollutant Reduction

School of Civil Engineering and Construction, Faculty of Science, Engineering and Computing, Kingston University, Kingston upon Thames, Surrey KT1 1LQ, UK
Water Sustainability Research Centre, Department of Mechanical, Aerospace and Civil Engineering, Brunel University, London, Uxbridge, Middlesex UB8 3PH, UK
Department of Civil Engineering, Faculty of Engineering and Science, University of Greenwich, Medway Campus, Chatham Maritime, Kent ME4 4TB, UK
Author to whom correspondence should be addressed.
Academic Editor: Say-Leong Ong
Received: 28 November 2014 / Revised: 1 April 2015 / Accepted: 2 April 2015 / Published: 15 April 2015
(This article belongs to the Special Issue Water Quality Control and Management)
View Full-Text   |   Download PDF [1091 KB, uploaded 9 June 2015]   |  


Applications of geotextiles within tertiary stormwater treatment systems and for stormwater infiltration can provide a substrate for biofilm formation, enabling biological treatment of contaminants. Geotextiles can serve as an efficient part of stormwater filtration within the urban water environment. The project assessed the applications of three experimental granular filters as a sustainable urban drainage system (SUDS) for the decomposition of organic pollutant loading present in stormwater. The three filter rigs were packed with alternating layers of filter media consisting of gravel, pea gravel, sand and either a single, double or no layer of geotextile membrane. A nonwoven geotextile was layered within the filter media. The hydraulic loading capacity for the three filters matched that commonly used with conventional sand filters systems. Water quality parameters were quantified by measuring suspended solids, chemical oxygen demand, dissolved oxygen, pH, nitrate-nitrogen, and phosphate concentrations. It was found that Filter Rig No. 3 (upper and lower geotextile membrane) and Filter Rig No. 2 (single geotextile membrane) had a significant statistical difference in treatment performance from Filter Rig No. 1 (no geotextile membrane). View Full-Text
Keywords: adsorption; biofilm; geomembrane; sustainable urban drainage system (SUDS); stormwater harvesting adsorption; biofilm; geomembrane; sustainable urban drainage system (SUDS); stormwater harvesting

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Paul, P.; Tota-Maharaj, K. Laboratory Studies on Granular Filters and Their Relationship to Geotextiles for Stormwater Pollutant Reduction. Water 2015, 7, 1595-1609.

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