To evaluate this hypothesis, a facultative tank was constructed
between a water hyacinth tank and a swine facility for sequential
treatment of wastewater discharged from the pens. Water surface
of the facultative tank was covered with plastic netting bags of
sliced water hyacinth for the determination of the pollutant reduction
effect. Concurrently, a TP-adsorption experiment was carriedout in the laboratory to investigate the possible mechanism associated
with the phenomenon