Stabilization of stormwater biofilters: Impacts of wetting and drying phases and the addition of organic matter to filter media

Subramaniam, Daniel Niruban, Egodawatta, Prasanna, Mather, Peter, & Rajapakse, Jay (2015) Stabilization of stormwater biofilters: Impacts of wetting and drying phases and the addition of organic matter to filter media. Environmental Management, 56(3), pp. 630-642.

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Ripening period refers to a phase of stabilization in sand filters in water treatment systems that follows a new installation or cleaning of the filter. Intermittent wetting and drying, a unique property of stormwater biofilters, would similarly be subjected to a phase of stabilization. Suspended solids, is an important parameter that is often used to monitor the stabilization of sand filters in water treatment systems. Stormwater biofilters however, contain organic material that is added to the filter layer to enhance nitrate removal, the dynamics of which is seldom analysed in stabilization of stormwater biofilters. Therefore, in this study of stormwater biofiltration in addition to suspended solids (Turbidity), organic matter (TOC, DOC, TN and TKN) was also monitored as a parameter for stabilization of the stormwater biofilter. One Perspex bioretention column (94 mm internal diameter) was fabricated with filter layer that contained 8% organic material and fed with tapwater with different antecedent dry days (0 – 40 day) at 100 mL/min. Samples were collected from the outflow at different time intervals between 2 – 150 minutes and were tested for Total Organic Carbon, Dissolved Organic Carbon, Total Nitrogen, Total Kjeldhal Nitrogen and Turbidity. The column was observed to experience two phases of stabilization, one at the beginning of each event that lasted for 30 minutes while the other phase was observed across subsequent events that related to the age of filter.

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ID Code: 85943
Item Type: Journal Article
Refereed: Yes
Keywords: Stabilization, Stormwater biofilters, Antecedent Dry Days, Organic Matter, Turbidity, Age of Filter
DOI: 10.1007/s00267-015-0530-0
ISSN: 1432-1009
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Water Quality Engineering (090508)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Springer Science+Business Media New York
Copyright Statement: The final publication is available at Springer via
Deposited On: 22 Jul 2015 23:01
Last Modified: 03 Oct 2016 05:37

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