Abstract:
The aim of the present study was to study the performance of bio-treatment ponds after one year of functioning at
National Agricultural Research Center, Islamabad, Pakistan. The physical parameters (colour, pH, EC, TDS, turbidity) and
chemical parameters (Zn, Cu, Cd, Ni, Mn, Fe and Pb) are within the limits which are not sub-lethal for fish rearing. Lemna
accumulates higher concentration of heavy metals as compared to wastewater and best for phytoremediation purpose. The
treated wastewater is currently used for rearing of fish and irrigation of crops and plants. The plants around the bio-treatment
ponds are healthy, green and showing enough production. The present investigation indicates that in future it would be
possible to construct bio-treatment ponds in polluted areas of Pakistan
