Abstract :
Due to the continuous increase in industrialisation and urbanization, wastewater has been released regularly into the
environment in excess amount, causing noteworthy impacts on human and wild life. Management and eco-friendly
treatment of the waste water whether industrial and domestic is the challenge of this century. In the present study an
attempt has been made to treat the waste water using three aquatic macrophytes viz. water hyacinth (Eichhornia
crassipes), canna (Cana indica) and duckweed (Lemna minor) for assessing the potential of these plants in the treatment of
sewage collected from drain located nearby Graphic Era University, Dehradun using phytoremediation technology on the
basis of different physicochemical parameters such as pH, EC, DO, ORP, Salinity, TDS, BOD, COD, Hardness and
Temperature. The study was divided into seven consecutive assessment periods of five days interval each. Highest
removal was observed in the experiment containing canna in each parameters which suggest that in the present study
canna (C. indica) was found most efficient plant in comparison to E. crassipes and L. minor. The capability of these plants
in the treatment of wastewater was established from the study. For efficient water purification, it is recommended to
remove the aquatic macrophytes from water bodies. If the harvesting of these aquatic macrophytes will not be performed
properly, the vast majority of the nutrients that have been absorbed and stored into the plant tissue will released again
into the water bodies due to decomposition of these macrophytes.
Keyword :
Harvesting, Eichhornia crassipes, IWMI, O and M problem, sullage