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Research Journal of Environmental Toxicology

Year: 2016 | Volume: 10 | Issue: 2 | Page No.: 100-108
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Authors

Amal A. Othman

Sayeda M. Ali

Mohammed T. Abbas

Keywords

Research Article

Microbial Water Quality and Diazotrophic Bacteria Community in Lake Nasser Khors, Egypt

Amal A. Othman, Sayeda M. Ali and Mohammed T. Abbas
Management of water quality, control of water pollution and environmental protection necessitated careful routine monitoring, especially Lake Nasser and Khors. Lake Nasser represents a fresh water reservoir and provides more than 95% of the Egyptian fresh water budget. Therefore, this study was carried out to investigate the microbial quality of Lake Nasser Khors (Kalabsha, Wadi-Abyad, Korosko and Tushka) through estimate total bacteria count at 22 and 37°C, total and Faecal Coliforms (FC), Faecal Streptococci (FS) and diazotrophic bacteria. As well as the potential diazotrophs isolates, having >5 n M C2H4/culture/hour, were identified by API 20E and API 20NE profiles. The results showed that the microbial load significant differences were attributed to the seasons and the sites. In general, among Khors the downstream Khors (Kalabsha and Wadiabyad) were higher microbial load than the upstream Khors (Toushka and Korosko). The low FC:FS ratio were reported in majority of sample indicating the non-human source of pollution. In addition, diazotrophs were existent in high population densities in all waters sampled along the experimental period. In conclusion, Khors water is generally acceptable for irrigation and was not suitable for drinking purpose without pre-treatment.
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