Abstract
Nutrient removal ability of a constructed wetland channel planting with Luffa cylindrica was examined for eutrophic lake water. The DIP removal by the channel was expressed as primary reaction with a reaction rate constant of 20.8 day-1. Nutrient absorbed by filamentous green algae (FGA) breeding in the channel occupied 67 and 90 % of total DIN and DP removed in the channel, revealing the significance of FGA in the nutrient removal. Since the FGA existed around the root of L. cylindrica, it could be considered that L. cylindrica contributed to support the inhabitation of FGA. High nutrient removal ability despite low nutrient concentration in the lake water demonstrates the applicability of the channel planting L. cylindrica on direct nutrient removal from eutrophic lake water.
