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Water 2017, 9(1), 32; doi:10.3390/w9010032

A Laboratory Study on the Filtration and Clogging of the Sand-Bottom Ash Mixture for Stormwater Infiltration Filter Media

Department of Civil and Environmental Engineering, Kongju National University, 1223-24 Cheonan-Daero, Cheonan 31080, Korea
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Academic Editor: Marco Franchini
Received: 4 May 2016 / Revised: 3 November 2016 / Accepted: 30 December 2016 / Published: 7 January 2017
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Abstract

The performance of stormwater infiltration systems depends significantly on the infiltration/filtration characteristics of filter media. Sand media have been frequently used due to their abundance and acceptable pollutant removal efficiency. Bottom ash media, which was known to have a high sorption capacity, are being considered as alternative and/or complement filter media to enhance the overall treatment efficiency. To verify the applicability of bottom ash as filter media, a series of 1-D column infiltration tests were conducted in this study. The filtration and clogging characteristics of the sand-bottom ash mixtures at different mixing ratios were investigated with limitedly focusing on the Total Suspended Solids (TSS) present in stormwater runoff. As a result, the presence of bottom ash was identified to improve the TSS removal efficiency in spite of having a significant increase in clogging potential. All media configurations were observed to experience the premature clogging and the clogging state for varying and constant head flow conditions, respectively. The noticeable amount of crushed bottom ash particles brought by seepage force could be accountable for the rapid occurrence of clogging phenomena. Overall, a homogeneous sand filter is preferred as long as the lifespan of filter system is the primary concern. View Full-Text
Keywords: infiltration; stormwater management; physical clogging; sand-bottom ash filter infiltration; stormwater management; physical clogging; sand-bottom ash filter
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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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MDPI and ACS Style

Segismundo, E.Q.; Kim, L.-H.; Jeong, S.-M.; Lee, B.-S. A Laboratory Study on the Filtration and Clogging of the Sand-Bottom Ash Mixture for Stormwater Infiltration Filter Media. Water 2017, 9, 32.

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