Nourhan Fekry Ali Abdou <br/><br/>
Improvement of water quality at drinking water treatment plants intakes on the River Nile /  
 تحسين جودة المياه عند مآخذ محطات  معالجة مياه الشرب 
Nourhan Fekry Ali Abdou ; Supervised Zeinat Kamel Mohamed , Sabry Zaghloul Wahba 
 - Cairo :   Nourhan Fekry Ali Abdou ,   2021 
 - 102 P. :   charts ;   25cm  
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Botany - Microbiology 
<br/><br/> Laboratory experiments were performed to study the effects of ultrasonic on the raw water quality by exposure to different time intervals (15,30,45,60 min) at various frequencies (20,40, 60 KHz). The study revealed that there was a positive correlation between ultrasonic intensity, sonication time and bacterial removal. Also, there was clear morphological changes in Nile water algae and blue green algae strains. No change was detected in chlorophyll 2a3 content of Nile water algae, while, remarkable decrease in chlorophyll "a" content of blue green algae strains was detected. There were a reduction in the alum dose and disinfectant byproducts formation. Finally, Ultrasound is an environmentally friendly due to no chemicals were added 
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<br/><br/><label>Subjects--Index Terms: </label>Coliform  Fecal Streptococcus  Ultrasonic