3. Results and Discussions
The wastewater treatment system was found performing satisfactorily in achieving the standards prescribed
by CPCB, New Delhi [10] for discharge of treated effluent into the natural water body (as depicted in Table
3.1). Besides the adequate performance for the removal of physico-chemical pollutants, the system was also
found effective in removal of total coliform, fecal coliform and fecal streptococci. The overall percentage
removal of the system for the total coliform, fecal coliform and fecal streptococci were found 99.988, 99.965
and 99.9567, respectively. This high removal may be achieved by virtue of the presence of high number of
protozoan in facultative and maturation ponds which has found responsible for direct killing of bacteria [3].
The plant operator reported that the fish species namely Katla which was currently being cultivated has been
found the maximum survival potential among commonly used fish species in tolerating higher organic
pollution. During the course of treatment, the density of fish was found to be increased during the course of
treatment which gives the direct indication of improved quality of treated effluent.
3. Results and DiscussionsThe wastewater treatment system was found performing satisfactorily in achieving the standards prescribedby CPCB, New Delhi [10] for discharge of treated effluent into the natural water body (as depicted in Table3.1). Besides the adequate performance for the removal of physico-chemical pollutants, the system was alsofound effective in removal of total coliform, fecal coliform and fecal streptococci. The overall percentageremoval of the system for the total coliform, fecal coliform and fecal streptococci were found 99.988, 99.965and 99.9567, respectively. This high removal may be achieved by virtue of the presence of high number ofprotozoan in facultative and maturation ponds which has found responsible for direct killing of bacteria [3].The plant operator reported that the fish species namely Katla which was currently being cultivated has beenfound the maximum survival potential among commonly used fish species in tolerating higher organicpollution. During the course of treatment, the density of fish was found to be increased during the course oftreatment which gives the direct indication of improved quality of treated effluent.
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