Treatment to water from oxidation second lagoon effluents with water hyacinth

The removal of coliforms and pathogenic organisms from effluents of oxidati on lagoons with Eichhornia crassipes (water hyacinth) was demonstrated and nitrogen, phosphorus, carbon and plumb were eliminated The removal of Giard ia cysts, SST and BOD from polish effluents was measured. Analysis accordin g to standard methods, were made in collected samples. Giardia cyst concent rations in water samples from effluents with water hyacinth were significan tly (p<0.05) less than from samples treated without hyacinths. There was no removal of the SST and BOD during study, The oxidation lagoons were effici ent for Giardia sp, cysts removal.