Efficiency of Wastewater Treatment Plant at Zagazig City for Removing Microbial and Chemical Pollutants (Case Study) (original) (raw)

2016, Journal of Agricultural Research

Biological urban wastewater treatment plants utilize microorganisms for wastewater treatment so that microbiological characterization of processes is very important. In addition, the removal of these microorganisms in the effluent for their reuse is important. This study aims to characterize the presence of microbial flora and chemical pollutants along the processes in Wastewater Treatment Plant (WTP) at ZagazigCity. The removal efficiency of total bacterial counts was approximately 20 -74% during all the periods of study from April 2011 up to January 2012. However, the average total Enterobacteriaceae count in the wastewater samples reduced in all the periods by 85% except in June and December 2011in which the reduction was varied between 29-37%. The results show a high level of coliforms, Escherichia coli, Salmonella and Shigella in the raw wastewater; although their total removal is not achieved (the removal efficiency was 11 to 83 %). Candida spp., which is a yeast indicator, al...