Investigating the influence of geotextile layers as biofilm granular filters to treat stormwater

Kiran Tota-Maharaj, Parneet Paul

    Research output: Contribution to journalArticle

    3 Citations (Scopus)


    This study investigated the application of geotextiles as sustainable urban drainage systems for degradation of organic pollutant load present in stormwater. Three experimental granular filter rigs were used, packed with alternating layers made up of gravel, pea gravel, sand and either an upper layer, an upper and lower layer or no layer of geotextile. The hydraulic loading capacity matched that commonly used on conventional sand filters. Standard water quality parameters were measured and collated data was evaluated using an ANOVA and Levine's test of homogeneity of variance procedure. It was found that the rig with both upper and lower geotextiles had a statistically significant difference in data from the rig with only a single geotextile layer. High chemical oxygen demand (58–80%) and suspended solids (88–99.99%) removal rates occurred for all rigs. However, the control rig showed increased outflow concentration of nutrients indicating the potential of geotextiles for stormwater treatment.
    Original languageEnglish
    Pages (from-to)559-569
    Number of pages11
    JournalUrban Water Journal
    Issue number7
    Early online date17 Jun 2014
    Publication statusPublished - 2015

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