Floating treatment wetlands for P and N removal from runoff effluents

MUFARREGE, M.M.; DI LUCA, G.A.; DE LA PEÑA, R.J.; JIMÉNEZ CATTALIN, M.J.; CARRERAS, A.A.; HADAD, H.R.; MAINE, M.A.

Valencia

Conferencia; 16th IWA International Conference on Wetlands Systems for Water Pollution Control; 2018

The International Water Association (IWA)

The aim of this work was to evaluate the P and N removal from a synthetic runoff effluent using microcosms-scale floating treatment wetlands (FTW). Each FTW consists of a raft constructed with a plastic net where plants were disposed. In six reactors, FTWs were disposed, 3 reactors were exposed to a synthetic effluent containing 10 mg L-1 N + 2 mg L-1 P (reactors A), and 3 were used as biological controls (BC: without addition of the effluent). There were also six reactors without FTWs, 3 were exposed to synthetic effluent (reactor B: with effluent) and 3 were used as chemical controls (CC: with sampling site water). Three effluent dumps were made. SRP, TP, N-NH4+ and N-NO3- were efficiently removed from water, demonstrating the efficiency of the FTW. In plant tissues TP and TKN were significantly higher in reactor A than in BC reactors. The use of FTW is a promising strategy for the sustainable treatment of water bodies affected by urban runoff.