The objective of this research was to analyze the performance of pond lily (Eichhornia crassipes (Mart.) Solms), in pig wastewater treatment, operating in static and dynamic conditions. In the study, solutions were used with concentrations in the range of 100 to 400 mg L-1 of BOD. The parameters used to evaluate the pig wastewater treatment were: initial concentration, minimum concentration, day of occurrence of the minimum concentration, maximum removal and maximum efficiency of removal. For the experimental conditions, it was observed that the use of pond lily resulted in the significant BOD reduction from the pig wastewater solutions. The maximum removal efficiencies for the static and dynamic systems were in the ranges of 69 to 79% and 83 to 91%, respectively. The performance parameters of these two systems were, in general, better for wastewater with higher initial BOD concentrations.
wastewater; purification; pond lily; BOD
