A Floating Treatment Wetland System is a key sustainable method to aid in reducing and preventing nutrient rich stormwater from entering inland water channels and causing eutrophication. The nutrient uptake efficiency for local macrophytes species in Australia is limited, with many studies completed overseas. The research conducted in this project tested the TSS, TN, TP, Growth Rate, Root Biomass Ratio and Aesthetic Ranking of 6 different local plant species, and a control tank, for the Sunshine Coast region. The final outcome determined the two plants suitable for FTWS as the Ficinia Nodosa and Philydrum Lanuginosum with TSS reduction values of 100% each and TP removal of 63% for Nodosa and 52% Philydrum. Both species had the highest growth rate ranging between 15 – 18% over a seven day period and a biomass ratio of 1.55 and 1.56. Using the data analysed in the study, a correlation can be established between the growth rate, root biomass ratio and the nutrient uptake efficiencies of plant species, in order to provide guidelines for developers and Councils to design and install FTWS.
Submitted in the fulfilment of the requirements of the degree of Bachelor of Engineering (Civil) (Hons), University of the Sunshine Coast, 2016.