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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : The role of tropical shrub with enhanced bioretention media in nutrient richrunoff treatment
The role of tropical shrub with enhanced bioretention media in nutrient richrunoff treatment
Bioretention systems with sedges as vegetation for the system are one of the popular Best Management Practices (BMPs)
in temperate countries. However, there are lack of studies using shrub in tropical countries, which has been used widely
as landscape plants. In recent years, use of additives for nutrient removal from water bodies has been proven to be
successful in various applications but the potential of using waste material as additives in bioretention has not been fully
discovered. In this study, the effect of tropical shrub with enhanced bioretention media, which contain 4 different types of
additives from waste materials (cockle shell, newspaper, coconut husk and printed paper) was examined. Natural runoff
with high pollutant concentration was used in this study. Comparison between 20 bioretention mesocosm planted with and
without Red Hot Chinese Hibiscus (Hibiscus rosa-sinensis) showed that tropical shrub with well-developed root systems
played an important role in maintaining hydraulic conductivity within the range stated in various guidelines. Results show
that after 16 weeks of runoff test, mean of hydraulic conductivity for mesocosm without shrub was ranging from 79 to
286mm/hour, whereby for mesocosm with shrub, the hydraulic conductivity was maintain within 170 to 190 mm/hour. For
total suspended solid (TSS) and total phosphorus (TP) mass removal, mesocosm with shrub containing cockle shell has
higher TSS and TP removal (95.7% and 93.3% respectively) compared to standard mesocosm (85.4% and 84.9%
respectively). For total nitrogen (TN) mass removal, mesocosm with shrub containing newspaper (80.4%) perform better
compared to standard mesocosm (57.4%), which proven that with selected bioretention media, Hibiscus rosa-sinensis is
recommended to be used for bioretention system in tropical climate to treat nutrient rich runoff.
File Size : 494,638 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 20/08/2015
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