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Microbial Quality of Irrigation Water of Public Parks in Dubai, United Arab Emirates

Journal of Environmental Science and Engineering(B) 2014年第4期3卷 218-223页

作者： Munawwar Ali Khan Hessa Saeed Ali Obaid Alkitibi Alia Ali Ahmad Aljanahi husna rasool baksh Rania Dghaim Department of Natural Science and Public Health College of Sustainability Science and Humanities Zayed University Dubai19282 United Arab Emirates Department of Safety and Environment Dubai Ports World Jebel Ali 17000 United Arab Emirates

In this study, the microbial quality of treated wastewater used for irrigation of three public parks in Dubai was evaluated. A total of 23 samples of TWW (treated wastewater) and 12 samples of irrigated soils from three public parks were collected and tested for Legionella, Salmonella, traditional bacterial indicators, Cryptosporidium oocyst and Giardia cysts using membrane filtration and direct immune-fluorescence assay. The majority of the tested water samples were found contaminated with LLO (Legionella like organisms), Salmonella and traditional bacterial indicators. Both Cryptosporidium oocysts and Giardia cysts were detected in these samples with a higher occurrence of Cryptosporidium oocysts (96%) than Giardia cysts (35%). The fecal coliform bacteria were detected in 60.8% of water samples and 58% of soil samples. Total coliform bacteria were detected in most of the water and soil samples with a higher occurrence than the fecal coliform bacteria. The results of this study indicate that microorganisms are surviving the chlorination method used for disinfecting wastewater, and are further multiplying in the public parks irrigation network system. Therefore, monitoring the treated wastewater for bacterial pathogens, protozoan parasites and controlling their growth at the point of end use are vital to reducing the risk of environmental contamination with microbial pathogens.

关键词：阿拉伯联合酋长国微生物灌溉水公园迪拜质量隐孢子虫卵囊土壤样品

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