The wastewater sample was collected from the aeration tank of
sewage treatment plant in a pre-cleaned, sterilized polyethylene
bottles. The collected samples were labeled, taken to the laboratory
and stored in a laboratory refrigerator at 4 C. All the
chemicals used in the study are purchased from Thomas baker
Ltd. (Mumbai, India) and the reagents were prepared using
double distilled water. The analysis of various characteristics
of the sample has been carried out as per standard procedure
prescribed by American public health association [22] and
the results are presented in