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King Fahd University of Petroleum and Minerals. (KFUPM) 2015

INFLUENCE OF TREATED SEWAGE EFFLUENTS ON SAUDI COAST OF THE ARABIAN GULF FROM WATER QUALITY AND MICROBIAL ASPECTS

ABDUL-RAHMAN AKINKUNMI YUSUF

Titre : INFLUENCE OF TREATED SEWAGE EFFLUENTS ON SAUDI COAST OF THE ARABIAN GULF FROM WATER QUALITY AND MICROBIAL ASPECTS

Auteur : ABDUL-RAHMAN AKINKUNMI YUSUF

Université de soutenance : King Fahd University of Petroleum and Minerals. (KFUPM)

Grade : Master of Science (MS) 2015

Résumé
This study investigated the influence of sewage effluents on water quality and microbial aspects of Saudi Arabian coastal waters of the Arabian Gulf. Water samples were analysed for nutrients, chlorophyll a, heterotrophic plate counts, total Coliforms and environmental variables in three outfall locations and a control location (Half Moon Bay). All three outfalls were found to serve as important sources of inorganic nutrient into the coastal waters. Significantly higher concentrations of nitrate and nitrite in Dammam and Rahima ; ammonia in Al-Khobar and Dammam ; and phosphate in all three outfall locations were recorded relative to the control. The mean nitrate, nitrite, ammonia, and phosphate concentrations in sampling stations ranged from 0.30 to 29.12 μmol/L, 0.17 to 10.66 μmol/L, 0.51 to 1.15 μmol/L, 0.35 to 25.00 μmol/L and 0.62 to 64.76 μg/L respectively. Chlorophyll a concentrations were significantly high only in Dammam at levels indicative of poor water quality. Total Coliform counts in sampling stations ranged from 4000 to 310000 CFU/100ml while heterotrophic plate counts ranged from 70 to 210000 CFU/ml. The lowest bacteria counts in effluent samples were recorded in Rahima. Microbiological quality of stations close to the outfalls is generally not safe for activities such as recreation and shell-fish harvesting based on international standards

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Page publiée le 19 novembre 2017, mise à jour le 18 janvier 2019