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

Water

Parneet Paul²  Kiran Tota-Maharaj¹ 

[1] Department of Civil Engineering, Faculty of Engineering and Science, University of Greenwich, Medway Campus, Chatham Maritime, Kent ME4 4TB, UK; E-Mail:;School of Civil Engineering and Construction, Faculty of Science, Engineering and Computing, Kingston University, Kingston upon Thames, Surrey KT1 1LQ, UK

关键词: adsorption;    biofilm;    geomembrane;    sustainable urban drainage system (SUDS);    stormwater harvesting;   

DOI  :  10.3390/w7041595

来源: mdpi

【 摘 要 】

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).

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.