The Investigation of Coliform Bacteria Removal Efficiency of Elazığ City Wastewater Treatment Plant

M.Esra TUNÇ, Ayhan ÜNLÜ


In this study, microbial pollution that is important for public health and have not been
found in discharge standards of Turkish Regulation of Water Pollution Control was determined. For this
reason, coliform bacteria removal efficiency of primary settling tank and treatment plant,
microbiological quality of effluent and receiving water (Kehli stream) were investigated by
bacteriological analysis of the samples taken from wastewater of the plant. Total and fecal coliform in
the primary settling tank were removed in the range of 43.33 - 91.87% and 44.44%, respectively. Overall
removal efficiency of total and fecal coliform in the treatment plant varied in the range of 72.0 – 99.5%
and 98.13 – 99.88%, respectively. However, it was seen that microbiological pollution of effluent of the
plant that discharged to receiving water was high. While fecal coliforms were between 1.3x103 and 7x104
MNP/100ml before discharge into Kehli Stream, whereas the amounts increased to 1.3x106-9x106
MNP/100ml after discharge.


Wastewater treatment; total and fecal coliform; coliform removal.

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