Biological surface water treatment: Replacing copper sulfate with aquatic macrophytes for the control of micro-algae in surface water.

摘要

his thesis examines the results of a project using aquatic vegetation, specifically Ceratophyllum demersum and Elodea densa, instead of copper sulfate, to control microalgae blooms and problem macrophytes that are responsible for the eutrophication of surface waters.;Weekly concentrations of phosphate and nitrate in both the project and control lakes were determined, coupled with observations of water clarity, and a laboratory analyses of phytoplankton abundance throughout the 1993-94 data collection year.;The results indicate that the phosphate levels in the project lake were significantly lower than those in the control lake (t = 3.65; df= 42;