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

Kiran Tota-Maharaj, Parneet Paul*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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 - 3 Oct 2015


  • geofilter
  • geotextile
  • granular-filtration
  • low impact development (LID)
  • stormwater management
  • sustainable urban drainage system (SUDS)


Dive into the research topics of 'Investigating the influence of geotextile layers as biofilm granular filters to treat stormwater'. Together they form a unique fingerprint.

Cite this